2025-09-30 11:56:06 +08:00
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Read time: 11 minute(s)
< / div > < div class = "- topic/body body" > < section class = "- topic/section section" id = "id__section_ubd_v3n_fdc" data-ofbid = "id__section_ubd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 信息配置< / h2 >
< p class = "- topic/p p" data-ofbid = "d200335e25__20250121171634" > SDK 中 UART 的配置信息包括< / p >
< ul class = "- topic/ul ul simple" id = "id__ul_ccd_v3n_fdc" data-ofbid = "id__ul_ccd_v3n_fdc" > < li class = "- topic/li li" data-ofbid = "d200335e29__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e31__20250121171634" > SoC 配置： Kconfig.chip< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e34__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e36__20250121171634" > 开发板配置： < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e39__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e41__20250121171634" > Pimux 配置： < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e44__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e46__20250121171634" > 设备配置： < / p >
< / li > < / ul >
< div class = "- topic/div div section" id = "id__soc" >
< strong class = "+ topic/ph hi-d/b ph b" > SoC 配置< / strong >
< p class = "- topic/p p" data-ofbid = "d200335e55__20250121171634" > SoC 的 UART 模块的基础信息配置在 bsp/artinchip/sys/soc name/Kconfig.chip 中设置< / p > < ul class = "- topic/ul ul simple" id = "id__ul_dcd_v3n_fdc" data-ofbid = "id__ul_dcd_v3n_fdc" > < li class = "- topic/li li" data-ofbid = "d200335e58__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e60__20250121171634" > 驱动版本信息< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e63__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e65__20250121171634" > UART 数目信息< / p >
< / li > < / ul > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_ecd_v3n_fdc" data-ofbid = "id__codeblock_ecd_v3n_fdc" > config AIC_UART_DRV
bool
< strong class = "hl-keyword" > default< / strong > n
config AIC_UART_DRV_V10
bool
< strong class = "hl-keyword" > default< / strong > y < strong class = "hl-keyword" > if< / strong > AIC_UART_DRV
config AIC_UART_DRV_VER
string
< strong class = "hl-keyword" > default< / strong > < span class = "hl-string" > "10"< / span > < strong class = "hl-keyword" > if< / strong > AIC_UART_DRV_V10
config AIC_UART_DEV_NUM
< strong class = "hl-keyword" > int< / strong >
< strong class = "hl-keyword" > default< / strong > < span class = "hl-number" > 8< / span > < strong class = "hl-keyword" > if< / strong > AIC_UART_DRV< / pre >
< / div >
< div class = "- topic/div div section" id = "id__id3" >
< strong class = "+ topic/ph hi-d/b ph b" > 开发板配置< / strong >
< p class = "- topic/p p" data-ofbid = "d200335e77__20250121171634" > 在 target/soc name/board name/Kconfig.board 中完成某一开发板中 UART 的相关信息设置， 一般会配置需要的 UART
端口 < / p > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_fcd_v3n_fdc" data-ofbid = "id__codeblock_fcd_v3n_fdc" > config AIC_USING_UART0
bool < span class = "hl-string" > "Using uart0"< / span >
< strong class = "hl-keyword" > default< / strong > n
select AIC_UART_DRV
config AIC_USING_UART1
bool < span class = "hl-string" > "Using uart1"< / span >
< strong class = "hl-keyword" > default< / strong > n
select AIC_UART_DRV< / pre > < / div >
< div class = "- topic/div div section" id = "id__pinmux" >
< strong class = "+ topic/ph hi-d/b ph b" > Pinmux< / strong >
< p class = "- topic/p p" data-ofbid = "d200335e88__20250121171634" > 在 target/soc name/board name/pinmux.c 中配置 UART 端口的
pinmux< / p > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_gcd_v3n_fdc" data-ofbid = "id__codeblock_gcd_v3n_fdc" > < strong class = "hl-keyword" > struct< / strong > aic_pinmux aic_pinmux_config[] = {
...
#ifdef AIC_USING_UART0
< em class = "hl-comment" > /* uart0 */< / em >
{< span class = "hl-number" > 5< / span > , PIN_PULL_DIS, < span class = "hl-number" > 3< / span > , < span class = "hl-string" > "PA.0"< / span > },
{< span class = "hl-number" > 5< / span > , PIN_PULL_DIS, < span class = "hl-number" > 3< / span > , < span class = "hl-string" > "PA.1"< / span > },
#endif< / pre >
< / div >
< div class = "- topic/div div section" id = "id__id4" >
< strong class = "+ topic/ph hi-d/b ph b" > 设备配置< / strong >
< p class = "- topic/p p" data-ofbid = "d200335e99__20250121171634" > 在 bsp/artinchip/drv/uart/Kconfig.dev 中设置设备的工作参数< / p > < ul class = "- topic/ul ul simple" id = "id__ul_hcd_v3n_fdc" data-ofbid = "id__ul_hcd_v3n_fdc" > < li class = "- topic/li li" data-ofbid = "d200335e102__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e104__20250121171634" > clock< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e107__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e109__20250121171634" > baudrate< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e112__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e114__20250121171634" > data bites< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e117__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e119__20250121171634" > stop bits< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e122__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e124__20250121171634" > parity< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e127__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e129__20250121171634" > function< / p >
< / li > < / ul > < pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_icd_v3n_fdc" data-ofbid = "id__codeblock_icd_v3n_fdc" > config AIC_DEV_UART0_BAUDRATE
< strong class = "hl-keyword" > int< / strong > < span class = "hl-string" > "uart0 baudrate"< / span >
< strong class = "hl-keyword" > default< / strong > < span class = "hl-number" > 115200< / span >
config AIC_DEV_UART0_DATABITS
< strong class = "hl-keyword" > int< / strong > < span class = "hl-string" > "uart0 data bits"< / span >
range < span class = "hl-number" > 0< / span > < span class = "hl-number" > 15< / span >
< strong class = "hl-keyword" > default< / strong > < span class = "hl-number" > 8< / span >
config AIC_DEV_UART0_STOPBITS
< strong class = "hl-keyword" > int< / strong > < span class = "hl-string" > "uart0 stop bits"< / span >
range < span class = "hl-number" > 0< / span > < span class = "hl-number" > 3< / span >
< strong class = "hl-keyword" > default< / strong > < span class = "hl-number" > 1< / span > < / pre > < / div >
< / section > < section class = "- topic/section section" id = "id__section_wbd_v3n_fdc" data-ofbid = "id__section_wbd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 源码说明< / h2 >
< p class = "- topic/p p" data-ofbid = "d200335e141__20250121171634" > UART 的功能通过三层包装实现：< / p >
< ul class = "- topic/ul ul simple" id = "id__ul_jcd_v3n_fdc" data-ofbid = "id__ul_jcd_v3n_fdc" > < li class = "- topic/li li" data-ofbid = "d200335e145__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e147__20250121171634" > HAL 层： bsp/artinchip/hal/uart/aic_hal_uart.c< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e150__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e152__20250121171634" > 驱动层： bsp/artinchip/drv/uart/aic_drv_uart.c< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d200335e155__20250121171634" >
< p class = "- topic/p p" data-ofbid = "d200335e157__20250121171634" > 应用层： kernel/rt-thread/components/drivers/serial/serial.c< / p >
< / li > < / ul >
< / section > < section class = "- topic/section section" id = "id__section_xbd_v3n_fdc" data-ofbid = "id__section_xbd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > HAL 层< / h2 >
< p class = "- topic/p p" data-ofbid = "d200335e166__20250121171634" > HAL 层主要完成对寄存的操作，对基础功能块的封装< / p >
< div class = "- topic/div div section" id = "id__id6" >
< strong class = "+ topic/ph hi-d/b ph b" > 寄存器< / strong >
< div class = "- topic/p p" data-ofbid = "d200335e176__20250121171634" > 代码中通过一个数据结构来完整的保存寄存器的数据，对数据结构变量的操作将直接操作到对寄存器< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_xzw_zhn_fdc" data-ofbid = "id__codeblock_xzw_zhn_fdc" > < strong class = "hl-keyword" > typedef< / strong > < strong class = "hl-keyword" > struct< / strong >
{
< strong class = "hl-keyword" > union< / strong >
{
__IM uint32_t RBR; < em class = "hl-comment" > /* Offset: 0x000 (R/ ) Receive buffer register */< / em >
__OM uint32_t THR; < em class = "hl-comment" > /* Offset: 0x000 ( /W) Transmission hold register */< / em >
__IOM uint32_t DLL; < em class = "hl-comment" > /* Offset: 0x000 (R/W) Clock frequency division low section register */< / em >
};
< strong class = "hl-keyword" > union< / strong >
{
__IOM uint32_t DLH; < em class = "hl-comment" > /* Offset: 0x004 (R/W) Clock frequency division high section register */< / em >
__IOM uint32_t IER; < em class = "hl-comment" > /* Offset: 0x004 (R/W) Interrupt enable register */< / em >
};
< strong class = "hl-keyword" > union< / strong >
{
__IM uint32_t IIR; < em class = "hl-comment" > /* Offset: 0x008 (R/ ) Interrupt indicia register */< / em >
__IOM uint32_t FCR; < em class = "hl-comment" > /* Offset: 0x008 (W) FIFO control register */< / em >
};
__IOM uint32_t LCR; < em class = "hl-comment" > /* Offset: 0x00C (R/W) Transmission control register */< / em >
__IOM uint32_t MCR; < em class = "hl-comment" > /* Offset: 0x010 (R/W) Modem Control register */< / em >
__IM uint32_t LSR; < em class = "hl-comment" > /* Offset: 0x014 (R/ ) Transmission state register */< / em >
__IM uint32_t MSR; < em class = "hl-comment" > /* Offset: 0x018 (R/ ) Modem state register */< / em >
uint32_t RESERVED1[< span class = "hl-number" > 24< / span > ]; < span class = "hl-tag-doctype-comment" > /**/
__IM uint32_t USR; /* Offset: 0x07c (R/ ) UART state register */< / span >
uint32_t RESERVED2[< span class = "hl-number" > 1< / span > ];
__IM uint32_t RFL; < em class = "hl-comment" > /* Offset: 0x084 (R/ ) UART rx fifo level register */< / em >
__IOM uint32_t HSK; < em class = "hl-comment" > /* Offset: 0x088 (R/W) UART dma hsk register */< / em >
uint32_t RESERVED3[< span class = "hl-number" > 6< / span > ];
__IOM uint32_t HALT; < em class = "hl-comment" > /* Offset: 0x0A4 */< / em >
} aic_usart_reg_t;< / pre > < / div > < / div >
< div class = "- topic/div div section" id = "id__id7" >
< strong class = "+ topic/ph hi-d/b ph b" > 扩展寄存器< / strong >
< div class = "- topic/p p" data-ofbid = "d200335e186__20250121171634" > 扩展寄存器是 ArtInChip 的特殊寄存器，从 0XB8
地址开始，采用和寄存一样的使用方式< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_xsn_13n_fdc" data-ofbid = "id__codeblock_xsn_13n_fdc" > < strong class = "hl-keyword" > typedef< / strong > < strong class = "hl-keyword" > struct< / strong >
{
__IOM uint32_t RS485DE; < em class = "hl-comment" > /* Offset: 0x0B8 (R/W ) RS485 DE Time register*/< / em >
uint32_t RESERVED0;
__IOM uint32_t RS485CTL; < em class = "hl-comment" > /* Offset: 0x0C0 (R/W ) RS485 Control and Status register*/< / em >
__IOM uint32_t RS485AM; < em class = "hl-comment" > /* Offset: 0x0C4 (R/W ) RS485 Address Match register*/< / em >
__IOM uint32_t RS485BIC; < em class = "hl-comment" > /* Offset: 0x0C8 (R/W ) RS485 Bus Idle Check register*/< / em >
} aic_usart_exreg_t;< / pre > < / div > < / div >
< / section > < section class = "- topic/section section" id = "id__section_ybd_v3n_fdc" data-ofbid = "id__section_ybd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 接口设计< / h2 >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_q5w_n3n_fdc" data-ofbid = "id__table_q5w_n3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 1< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_initialize< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_q5w_n3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_q5w_n3n_fdc__entry__2" > static int hal_usart_initialize(int32_t idx, usart_event_cb_t
cb_event, void *handler)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__2" > 初始化 UART 端口< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > index - UART 端口号< / div >
< div class = "- topic/div div" > cb_event - event call back< / div >
< div class = "- topic/div div" > handler - 生成的工作句柄< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_q5w_n3n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_q5w_n3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_q5w_n3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_zf1_43n_fdc" data-ofbid = "id__table_zf1_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 2< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_uninitialize < / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_zf1_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_zf1_43n_fdc__entry__2" > int hal_usart_uninitialize(void *handler)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__2" > 关闭 UART 端口< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handler - UART 句柄< / div >
< div class = "- topic/div div" > cb_event - event call back< / div >
< div class = "- topic/div div" > handler - 生产的工作句柄< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zf1_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_zf1_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_zf1_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_tyd_43n_fdc" data-ofbid = "id__table_tyd_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 3< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_config< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_tyd_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_tyd_43n_fdc__entry__2" > int hal_usart_config(usart_handle_t handle, ……)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__2" > 配置 UART 的工作参数< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > baud - 波特率< / div >
< div class = "- topic/div div" > mode - 工作模式，同步还是异步< / div >
< div class = "- topic/div div" > parity - 极性< / div >
< div class = "- topic/div div" > stopbits - 停止位< / div >
< div class = "- topic/div div" > bits - 数据位< / div >
< div class = "- topic/div div" > func - 功能， ， < / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_tyd_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_tyd_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_tyd_43n_fdc__entry__2" > - < / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_rrg_43n_fdc" data-ofbid = "id__table_rrg_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 4< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_send< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_rrg_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_rrg_43n_fdc__entry__2" > int32_t al_usart_send(usart_handle_t handle, const void *data,
uint32_t num)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__2" > 发送数据< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > data - 待发送数据< / div >
< div class = "- topic/div div" > num - 数据长度< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rrg_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_rrg_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_rrg_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_yhj_43n_fdc" data-ofbid = "id__table_yhj_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 5< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_receive< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_yhj_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_yhj_43n_fdc__entry__2" > int32_t hal_usart_receive(usart_handle_t handle, void *data,
uint32_t num)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__2" > 接收数据< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > data - 接收数据 buffer< / div >
< div class = "- topic/div div" > num - 要接收的数据长度< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_yhj_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_yhj_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_yhj_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_wyl_43n_fdc" data-ofbid = "id__table_wyl_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 6< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_receive_query< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_wyl_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_wyl_43n_fdc__entry__2" > int32_t hal_usart_receive_query(usart_handle_t handle, void
*data, uint32_t num)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__2" > 查询要接收的数据的长度< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > data - 接收数据 buffer< / div >
< div class = "- topic/div div" > num - buffer 的大小< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_wyl_43n_fdc__entry__2" > 长度< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_wyl_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_wyl_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_iv4_43n_fdc" data-ofbid = "id__table_iv4_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 7< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_get_status< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_iv4_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_iv4_43n_fdc__entry__2" > usart_status_t hal_usart_get_status(usart_handle_t
handle)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__2" > 获取 UART 的状态< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__2" > handle - UART 句柄< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_iv4_43n_fdc__entry__2" > 状态值< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_iv4_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_iv4_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_zvt_43n_fdc" data-ofbid = "id__table_zvt_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 8< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_flush< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_zvt_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_zvt_43n_fdc__entry__2" > int32_t hal_usart_flush(usart_handle_t handle, usart_flush_type_e
type)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__2" > flush 发送或接收的数据< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > type - 发送或者接收< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_zvt_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_zvt_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_zvt_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_f4w_43n_fdc" data-ofbid = "id__table_f4w_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 9< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_config_flowctrl< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_f4w_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_f4w_43n_fdc__entry__2" > int32_t hal_usart_config_flowctrl(usart_handle_t handle，
usart_flowctrl_type_e flowctrl_type)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__2" > 配置 UART 的流控< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > flowctrl_type - 流控类型< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_f4w_43n_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_f4w_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_f4w_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_jdz_43n_fdc" data-ofbid = "id__table_jdz_43n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 10< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_uart_set_fifo< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_jdz_43n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_jdz_43n_fdc__entry__2" > int32_t hal_uart_set_fifo(usart_handle_t handle)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__2" > 设置 UART-DMA 模式下 rx_fifo 和 tx_fifo 的触发阈值< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_jdz_43n_fdc__entry__2" > 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_jdz_43n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_jdz_43n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_ndc_p3n_fdc" data-ofbid = "id__table_ndc_p3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 11< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_set_hsk< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_ndc_p3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_ndc_p3n_fdc__entry__2" > int32_t hal_usart_set_hsk(usart_handle_t handle)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__2" > 配置 UART-DMA 握手模式< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ndc_p3n_fdc__entry__2" > 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_ndc_p3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_ndc_p3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_vvg_p3n_fdc" data-ofbid = "id__table_vvg_p3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 12< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_get_rx_fifo_num< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_vvg_p3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_vvg_p3n_fdc__entry__2" > int32_t hal_usart_get_rx_fifo_num(usart_handle_t handle)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__2" > 读取 rx_fifo 里面的数据量< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_vvg_p3n_fdc__entry__2" > fifo_num， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_vvg_p3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_vvg_p3n_fdc__entry__2" > - < / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_xwj_p3n_fdc" data-ofbid = "id__table_xwj_p3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 13< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_uart_rx_dma_config< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_xwj_p3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_xwj_p3n_fdc__entry__2" > int32_t hal_uart_rx_dma_config(usart_handle_t handle, uint8_t
*buf, uint32_t size)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__2" > 配置 UART-DMA 接收的参数< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > buf - DMA 搬运的目标地址< / div >
< div class = "- topic/div div" > size - 搬运数据的大小< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_xwj_p3n_fdc__entry__2" > 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_xwj_p3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_xwj_p3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_dgm_p3n_fdc" data-ofbid = "id__table_dgm_p3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 14< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_uart_send_by_dma< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_dgm_p3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_dgm_p3n_fdc__entry__2" > int32_t hal_uart_send_by_dma(usart_handle_t handle, uint8_t *buf,
uint32_t size)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__2" > 配置 UART-DMA 发送的参数< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > buf - DMA 搬运的源端地址< / div >
< div class = "- topic/div div" > size - 搬运数据的大小< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_dgm_p3n_fdc__entry__2" > 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_dgm_p3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_dgm_p3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_cn4_p3n_fdc" data-ofbid = "id__table_cn4_p3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 15< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > hal_usart_halt_tx_enable< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_cn4_p3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_cn4_p3n_fdc__entry__2" > int32_t hal_usart_halt_tx_enable(usart_handle_t handle, uint8_t
halt_tx_enable)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__2" > 控制设备发送数据的开关< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > handle - UART 句柄< / div >
< div class = "- topic/div div" > halt_tx_enable - 禁止发送使能标志< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_cn4_p3n_fdc__entry__2" > 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_cn4_p3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_cn4_p3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< / section > < section class = "- topic/section section" id = "id__section_zbd_v3n_fdc" data-ofbid = "id__section_zbd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 驱动层< / h2 >
< p class = "- topic/p p" data-ofbid = "d200335e868__20250121171634" > 驱动层通过调用 HAL 层的接口，完成对 UART 设备的驱动实现, 代码在 bsp/artinchip/drv/uart/aic_drv_uart.c< / p >
< div class = "- topic/div div section" id = "id__id10" >
< strong class = "+ topic/ph hi-d/b ph b" > 驱动参数< / strong >
< div class = "- topic/p p" data-ofbid = "d200335e876__20250121171634" > 驱动的参数配置通过在 Kconfig
中的宏来初始化< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_hg5_f3n_fdc" data-ofbid = "id__codeblock_hg5_f3n_fdc" > < strong class = "hl-keyword" > struct< / strong > drv_uart_dev_para
{
uint32_t index :< span class = "hl-number" > 4< / span > ;
uint32_t data_bits :< span class = "hl-number" > 4< / span > ;
uint32_t stop_bits :< span class = "hl-number" > 2< / span > ;
uint32_t parity :< span class = "hl-number" > 2< / span > ;
uint32_t flag;
uint32_t baud_rate;
uint32_t clk_freq;
uint32_t function;
< strong class = "hl-keyword" > char< / strong > * name;
< strong class = "hl-keyword" > char< / strong > * uart_rts_name;
< strong class = "hl-keyword" > char< / strong > * uart_cts_name;
};
< strong class = "hl-keyword" > const< / strong > < strong class = "hl-keyword" > struct< / strong > drv_uart_dev_para uart_dev_paras[] =
{
#ifdef AIC_USING_UART0
{< span class = "hl-number" > 0< / span > , AIC_DEV_UART0_DATABITS, AIC_DEV_UART0_STOPBITS, AIC_DEV_UART0_PARITY, AIC_UART0_FLAG,
AIC_DEV_UART0_BAUDRATE, AIC_CLK_UART0_FREQ, AIC_DEV_UART0_MODE, < span class = "hl-string" > "uart0"< / span > , AIC_UART0_RTS_NAME, AIC_UART0_CTS_NAME},
#endif
#ifdef AIC_USING_UART1
{< span class = "hl-number" > 1< / span > , AIC_DEV_UART1_DATABITS, AIC_DEV_UART1_STOPBITS, AIC_DEV_UART1_PARITY, AIC_UART1_FLAG,
AIC_DEV_UART1_BAUDRATE, AIC_CLK_UART1_FREQ, AIC_DEV_UART1_MODE, < span class = "hl-string" > "uart1"< / span > , AIC_UART1_RTS_NAME, AIC_UART1_CTS_NAME},
#endif
#ifdef AIC_USING_UART2
{< span class = "hl-number" > 2< / span > , AIC_DEV_UART2_DATABITS, AIC_DEV_UART2_STOPBITS, AIC_DEV_UART2_PARITY, AIC_UART2_FLAG,
AIC_DEV_UART2_BAUDRATE, AIC_CLK_UART2_FREQ, AIC_DEV_UART2_MODE, < span class = "hl-string" > "uart2"< / span > , AIC_UART2_RTS_NAME, AIC_UART2_CTS_NAME},
#endif
#ifdef AIC_USING_UART3
{< span class = "hl-number" > 3< / span > , AIC_DEV_UART3_DATABITS, AIC_DEV_UART3_STOPBITS, AIC_DEV_UART3_PARITY, AIC_UART3_FLAG,
AIC_DEV_UART3_BAUDRATE, AIC_CLK_UART3_FREQ, AIC_DEV_UART3_MODE, < span class = "hl-string" > "uart3"< / span > , AIC_UART3_RTS_NAME, AIC_UART3_CTS_NAME},
#endif
#ifdef AIC_USING_UART4
{< span class = "hl-number" > 4< / span > , AIC_DEV_UART4_DATABITS, AIC_DEV_UART4_STOPBITS, AIC_DEV_UART4_PARITY, AIC_UART4_FLAG,
AIC_DEV_UART4_BAUDRATE, AIC_CLK_UART4_FREQ, AIC_DEV_UART4_MODE, < span class = "hl-string" > "uart4"< / span > , AIC_UART4_RTS_NAME, AIC_UART4_CTS_NAME},
#endif
#ifdef AIC_USING_UART5
{< span class = "hl-number" > 5< / span > , AIC_DEV_UART5_DATABITS, AIC_DEV_UART5_STOPBITS, AIC_DEV_UART5_PARITY, AIC_UART5_FLAG,
AIC_DEV_UART5_BAUDRATE, AIC_CLK_UART5_FREQ, AIC_DEV_UART5_MODE, < span class = "hl-string" > "uart5"< / span > , AIC_UART5_RTS_NAME, AIC_UART5_CTS_NAME},
#endif
#ifdef AIC_USING_UART6
{< span class = "hl-number" > 6< / span > , AIC_DEV_UART6_DATABITS, AIC_DEV_UART6_STOPBITS, AIC_DEV_UART6_PARITY, AIC_UART6_FLAG,
AIC_DEV_UART6_BAUDRATE, AIC_CLK_UART6_FREQ, AIC_DEV_UART6_MODE, < span class = "hl-string" > "uart6"< / span > , AIC_UART6_RTS_NAME, AIC_UART6_CTS_NAME},
#endif
#ifdef AIC_USING_UART7
{< span class = "hl-number" > 7< / span > , AIC_DEV_UART7_DATABITS, AIC_DEV_UART7_STOPBITS, AIC_DEV_UART7_PARITY, AIC_UART7_FLAG,
AIC_DEV_UART7_BAUDRATE, AIC_CLK_UART7_FREQ, AIC_DEV_UART7_MODE, < span class = "hl-string" > "uart7"< / span > , AIC_UART7_RTS_NAME, AIC_UART7_CTS_NAME},
#endif
};< / pre > < / div > < / div >
< div class = "- topic/div div section" id = "id__id11" >
< strong class = "+ topic/ph hi-d/b ph b" > 初始化< / strong >
< div class = "- topic/p p" data-ofbid = "d200335e886__20250121171634" > 初始化工作通过调用 RT-Thread
的标准初始化接口实现< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_tnf_g3n_fdc" data-ofbid = "id__codeblock_tnf_g3n_fdc" > INIT_BOARD_EXPORT(drv_usart_init);
< strong class = "hl-keyword" > int< / strong > drv_usart_init(< strong class = "hl-keyword" > void< / strong > )
{
< strong class = "hl-keyword" > struct< / strong > serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
< strong class = "hl-keyword" > int< / strong > u = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > int< / strong > i = < span class = "hl-number" > 0< / span > ;
< strong class = "hl-keyword" > for< / strong > (i=< span class = "hl-number" > 0< / span > ; i< < strong class = "hl-keyword" > sizeof< / strong > (uart_dev_paras)/< strong class = "hl-keyword" > sizeof< / strong > (< strong class = "hl-keyword" > struct< / strong > drv_uart_dev_para); i++) {
u = uart_dev_paras[i].index;
g_serial[u].ops = & drv_uart_ops;
g_serial[u].config = config;
g_serial[u].config.bufsz = < span class = "hl-number" > 2048< / span > ;
g_serial[u].config.baud_rate = uart_dev_paras[i].baud_rate;
g_serial[u].config.data_bits = uart_dev_paras[i].data_bits;
g_serial[u].config.stop_bits = uart_dev_paras[i].stop_bits - < span class = "hl-number" > 1< / span > ;
g_serial[u].config.parity = uart_dev_paras[i].parity;
g_serial[u].config.function = uart_dev_paras[i].function;
g_serial[u].config.flag = uart_dev_paras[i].flag;
g_serial[u].config.uart_index = uart_dev_paras[i].index;
hal_clk_set_freq(CLK_UART0 + u, uart_dev_paras[i].clk_freq);
hal_clk_enable(CLK_UART0 + u);
hal_reset_assert(RESET_UART0 + u);
aic_udelay(< span class = "hl-number" > 10000< / span > );
hal_reset_deassert(RESET_UART0 + u);
#ifdef FINSH_POLL_MODE
uart_handle[u] = hal_usart_initialize(u, NULL, NULL);
#< strong class = "hl-keyword" > else< / strong >
uart_handle[u] = hal_usart_initialize(u, NULL, drv_usart_irqhandler);
#endif
rt_hw_serial_register(& g_serial[u],
uart_dev_paras[i].name,
#ifdef FINSH_POLL_MODE
RT_DEVICE_FLAG_RDWR,
#< strong class = "hl-keyword" > else< / strong >
uart_dev_paras[i].flag,
#endif
uart_handle[u]);
< strong class = "hl-keyword" > if< / strong > (uart_dev_paras[i].flag == AIC_UART_DMA_FLAG) {
hal_uart_set_fifo((aic_usart_priv_t *)g_serial[u].parent.user_data);
hal_uart_attach_callback((aic_usart_priv_t *)g_serial[u].parent.user_data,
drv_uart_callback, NULL);
hal_usart_set_ier((aic_usart_priv_t *)g_serial[u].parent.user_data, < span class = "hl-number" > 1< / span > );
}
drv_usart_function_init(i, u);
}
< strong class = "hl-keyword" > return< / strong > < span class = "hl-number" > 0< / span > ;
}< / pre > < / div > < / div >
< div class = "- topic/div div section" id = "id__id12" >
< strong class = "+ topic/ph hi-d/b ph b" > 对外接口< / strong >
< div class = "- topic/p p" data-ofbid = "d200335e896__20250121171634" > UART 驱动对外的接口主要是实现了 rt_uart_ops 的标准接口，使用 dma_transmit 需要在 menuconfig 打开相应的
uart-dma
使能开关< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_os4_g3n_fdc" data-ofbid = "id__codeblock_os4_g3n_fdc" > < strong class = "hl-keyword" > const< / strong > < strong class = "hl-keyword" > struct< / strong > rt_uart_ops drv_uart_ops =
{
drv_uart_configure,
drv_uart_control,
drv_uart_putc,
drv_uart_getc,
#< strong class = "hl-keyword" > if< / strong > defined (RT_SERIAL_USING_DMA)
drv_uart_dma_transmit,
#endif
};< / pre > < / div > < / div >
< / section > < section class = "- topic/section section" id = "id__section_acd_v3n_fdc" data-ofbid = "id__section_acd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 应用层< / h2 >
< p class = "- topic/p p" data-ofbid = "d200335e906__20250121171634" > UART 在应用层被封装成了一个标准的设备，通过读写进行数据的发送和接收< / p >
< p class = "- topic/p p" data-ofbid = "d200335e909__20250121171634" > 设备实现代码：
使用示例代码：< span class = "+ topic/ph sw-d/filepath ph filepath" > bsp/examples/test-uart/test_uart.c< / span >
< / p >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_rv2_h3n_fdc" data-ofbid = "id__table_rv2_h3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 16< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > rt_device_find< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_rv2_h3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_rv2_h3n_fdc__entry__2" > rt_device_t rt_device_find(const char *name);< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__2" > 找到相应的设备< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__2" > name - 设备名< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_rv2_h3n_fdc__entry__2" > 设备变量或者 NULL< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_rv2_h3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_rv2_h3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_ctf_33n_fdc" data-ofbid = "id__table_ctf_33n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 17< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > rt_device_open< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_ctf_33n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_ctf_33n_fdc__entry__2" > rt_err_t rt_device_open (rt_device_t dev, rt_uint16_t
oflag);< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__2" > 打开设备< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > dev - UART device< / div >
< div class = "- topic/div div" > oflag - 打开参数< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ctf_33n_fdc__entry__2" > 0， ； < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_ctf_33n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_ctf_33n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_t4r_33n_fdc" data-ofbid = "id__table_t4r_33n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 18< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > rt_device_close< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_t4r_33n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_t4r_33n_fdc__entry__2" > rt_err_t rt_device_close(rt_device_t dev);< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__2" > 关闭设备< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__2" > dev - 设备名< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_t4r_33n_fdc__entry__2" > 0， ； < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_t4r_33n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_t4r_33n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_mxf_j3n_fdc" data-ofbid = "id__table_mxf_j3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 19< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > rt_device_read< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_mxf_j3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_mxf_j3n_fdc__entry__2" > rt_size_t rt_device_read (rt_device_t dev, rt_off_t pos, void
*buffer, rt_size_t size);< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__2" > 接收信息< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > dev - UART device< / div >
< div class = "- topic/div div" > pos - 起始位置< / div >
< div class = "- topic/div div" > buffer - 数据存储区< / div >
< div class = "- topic/div div" > size - 大小< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_mxf_j3n_fdc__entry__2" > 接收数据的大小< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_mxf_j3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_mxf_j3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_lll_j3n_fdc" data-ofbid = "id__table_lll_j3n_fdc" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 20< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > rt_device_write< / span > < / caption > < colgroup > < col style = "width:16.666666666666664%" / > < col style = "width:83.33333333333334%" / > < / colgroup > < thead class = "- topic/thead thead" > < tr class = "- topic/row" > < th class = "- topic/entry entry colsep-1 rowsep-1" id = "id__table_lll_j3n_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_lll_j3n_fdc__entry__2" > rt_size_t rt_device_write (rt_device_t dev, rt_off_t pos, void
*buffer, rt_size_t size);< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__2" > 发送信息< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > dev - UART device< / div >
< div class = "- topic/div div" > pos - 起始位置< / div >
< div class = "- topic/div div" > buffer - 数据存储区< / div >
< div class = "- topic/div div" > size - 大小< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_lll_j3n_fdc__entry__2" > 发送数据的大小< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_lll_j3n_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_lll_j3n_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div >
< / section > < section class = "- topic/section section" id = "id__section_bcd_v3n_fdc" data-ofbid = "id__section_bcd_v3n_fdc" > < h2 class = "- topic/title title sectiontitle" > 使用示例< / h2 >
< div class = "- topic/p p" data-ofbid = "d200335e1130__20250121171634" > 示例可以参考
bsp/examples/test-uart/test_uart.c< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_ucp_y3n_fdc" data-ofbid = "id__codeblock_ucp_y3n_fdc" > < strong class = "hl-keyword" > static< / strong > rt_device_t serial = rt_device_find(< span class = "hl-string" > "uart1"< / span > );
rt_device_open(serial, RT_DEVICE_FLAG_RDONLY);
rt_device_write(serial, < span class = "hl-number" > 0< / span > , str_send, (< strong class = "hl-keyword" > sizeof< / strong > (str_send) - < span class = "hl-number" > 1< / span > ));
rt_device_read(serial, < span class = "hl-number" > 0< / span > , str_send, < span class = "hl-number" > 1< / span > );< / pre > < / div >
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< div class = " wh_topic_toc " > < div class = "wh_topic_label" > 在本页上< / div > < ul > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_ubd_v3n_fdc" data-tocid = "id__section_ubd_v3n_fdc" > 信息配置< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_wbd_v3n_fdc" data-tocid = "id__section_wbd_v3n_fdc" > 源码说明< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_xbd_v3n_fdc" data-tocid = "id__section_xbd_v3n_fdc" > HAL 层< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_ybd_v3n_fdc" data-tocid = "id__section_ybd_v3n_fdc" > 接口设计< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_zbd_v3n_fdc" data-tocid = "id__section_zbd_v3n_fdc" > 驱动层< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_acd_v3n_fdc" data-tocid = "id__section_acd_v3n_fdc" > 应用层< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__section_bcd_v3n_fdc" data-tocid = "id__section_bcd_v3n_fdc" > 使用示例< / a > < / div > < / li > < / ul > < / div >
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