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href="../../../topics/sdk/usb/usb_user_guide_2.html" id="usb_user_guide-d5856e5951-link">USB 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e6011" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e6011-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mac/mac_user_guide_2.html" id="id-d5856e6011-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/uart/uart_design_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
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：Kconfig.board</p>
|
||
</li><li class="- topic/li li" data-ofbid="d200335e39__20250121171634">
|
||
<p class="- topic/p p" data-ofbid="d200335e41__20250121171634">Pimux 配置：pinmux.c</p>
|
||
</li><li class="- topic/li li" data-ofbid="d200335e44__20250121171634">
|
||
<p class="- topic/p p" data-ofbid="d200335e46__20250121171634">设备配置：Kconfig.dev</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，成功； < 0，失败</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，成功； < 0，失败</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，RS232，RF485 等</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，成功； < 0，失败</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，成功； < 0，失败</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，成功； < 0，失败</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，成功； < 0，失败</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，成功； < 0，失败</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，成功</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，成功</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，数据的多少</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，成功</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，成功</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，成功</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：kernel/rt-thread/components/drivers/serial/serial.c
|
||
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>
|
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<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，成功； 其他，失败</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，成功； 其他，失败</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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