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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/xpwm/xpwm_design.dita" > Edit online< / a > < / span > < h1 class = "- topic/title title topictitle1" id = "ariaid-title1" > 设计说明< / h1 > < div class = "date inPage" > 30 Oct 2024< / div > < div style = "color: gray;" >
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< / div > < div class = "- topic/body body" > < section class = "- topic/section section" id = "id__id2" data-ofbid = "id__id2" > < h2 class = "- topic/title title sectiontitle" > 源码说明< / h2 >
< p class = "- topic/p p" data-ofbid = "d285672e22__20250121171754" > 源代码位于 < code class = "+ topic/ph pr-d/codeph ph codeph" > bsp/artinchip/< / code > ： < / p > < ul class = "- topic/ul ul simple" data-ofbid = "d285672e27__20250121171754" > < li class = "- topic/li li" data-ofbid = "d285672e28__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e30__20250121171754" > bsp/artinchip/drv/xpwm/drv_xpwm.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d285672e33__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e35__20250121171754" > bsp/artinchip/hal/xpwm/hal_xpwm.c， < / p >
< / li > < li class = "- topic/li li" data-ofbid = "d285672e38__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e40__20250121171754" > bsp/artinchip/include/hal/hal_xpwm.h， < / p >
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< / section > < section class = "- topic/section section" id = "id__id3" data-ofbid = "id__id3" > < h2 class = "- topic/title title sectiontitle" > 模块架构< / h2 >
< p class = "- topic/p p" data-ofbid = "d285672e49__20250121171754" > XPWM/PWM 驱动 Driver 层采用 RT-Thread 的 PWM 设备驱动框架。HAL 层也可以支持 Baremetal
方式或配合自定义的设备驱动框架进行使用。< / p >
< figure class = "- topic/fig fig fignone" id = "id__id7" data-ofbid = "id__id7" > < br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" src = "../../../images/xpwm/sw_system13.png" alt = "sw_system13" / > < / div > < br / > < figcaption data-caption-side = "bottom" class = "- topic/title title figcapcenter" > < span class = "figtitleprefix fig--title-label" > 图< span class = "fig--title-label-number" > 1< / span > < span class = "fig--title-label-punctuation" > . < / span > < / span > < span class = "fig--title" > XPWM/PWM 驱动的软件架构图< / span > < / figcaption > < / figure >
< / section > < section class = "- topic/section section" id = "id__id4" data-ofbid = "id__id4" > < h2 class = "- topic/title title sectiontitle" > 关键流程设计< / h2 >
< div class = "- topic/div div section" id = "id__id5" >
< strong class = "+ topic/ph hi-d/b ph b" > 初始化流程< / strong >
< p class = "- topic/p p" data-ofbid = "d285672e69__20250121171754" > XPWM/PWM 驱动的初始化接口通过 < code class = "+ topic/ph pr-d/codeph ph codeph" > INIT_DEVICE_EXPORT(drv_xpwm_init)< / code > 完成，主要是通过调用
PWM 子系统的接口 rt_device_pwm_register() 注册一个 PWM 设备。< / p > < p class = "- topic/p p" data-ofbid = "d285672e74__20250121171754" > XPWM/PWM
控制器的初始化过程，主要步骤有：< / p > < ol class = "- topic/ol ol arabic simple" data-ofbid = "d285672e76__20250121171754" > < li class = "- topic/li li" data-ofbid = "d285672e77__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e79__20250121171754" > 初始化模块的 clk< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d285672e82__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e84__20250121171754" > 初始化模块的默认参数< / p >
< / li > < li class = "- topic/li li" data-ofbid = "d285672e87__20250121171754" >
< p class = "- topic/p p" data-ofbid = "d285672e89__20250121171754" > 向设备框架中注册 PWM 设备< / p >
< / li > < / ol > < / div > < / section > < section class = "- topic/section section" id = "id__id6" data-ofbid = "id__id6" > < h2 class = "- topic/title title sectiontitle" > 数据结构设计< / h2 >
< div class = "- topic/div div section" id = "id__struct-aic-xpwm-arg" >
< strong class = "+ topic/ph hi-d/b ph b" > struct aic_xpwm_arg< / strong >
< div class = "- topic/p p" data-ofbid = "d285672e102__20250121171754" > 属于 HAL 层接口，记录每一个 PWM
通道的配置信息：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_dbw_tj3_fdc" data-ofbid = "id__codeblock_dbw_tj3_fdc" > < strong class = "hl-keyword" > struct< / strong > aic_xpwm_arg {
u16 available;
u16 id;
u32 tb_clk_rate;
u32 freq;
u32 period;
u32 duty;
s32 def_level;
u32 dma_en;
u32 fifo_en;
u32 fifo_th;
u32 pul_limit_en;
< strong class = "hl-keyword" > enum< / strong > xpwm_polarity polarity;
< strong class = "hl-keyword" > struct< / strong > xpwm_int_s xpwm_int;
< strong class = "hl-keyword" > struct< / strong > aic_xpwm_transfer_info t_info;
};< / pre > < / div > < / div > < / section > < section class = "- topic/section section" id = "id__driver" data-ofbid = "id__driver" > < h2 class = "- topic/title title sectiontitle" > Driver 层接口设计< / h2 >
< div class = "- topic/p p" data-ofbid = "d285672e111__20250121171754" > 以下接口是 PWM 设备驱动框架需要的标准接口。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_m55_5j3_fdc" data-ofbid = "id__codeblock_m55_5j3_fdc" > < strong class = "hl-keyword" > struct< / strong > rt_pwm_ops
{
rt_err_t (*control)(< strong class = "hl-keyword" > struct< / strong > rt_device_pwm *device, < strong class = "hl-keyword" > int< / strong > cmd, < strong class = "hl-keyword" > void< / strong > *arg);
};< / pre > < / div > < div class = "table-container" > < table class = "- topic/table table frame-all" id = "id__table_ejd_vj3_fdc" data-ofbid = "id__table_ejd_vj3_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" > drv_pwm_control< / 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_ejd_vj3_fdc__entry__1" > 函数原型< / th > < th class = "- topic/entry entry colsep-0 rowsep-1" id = "id__table_ejd_vj3_fdc__entry__2" > static rt_err_t drv_xpwm_control(struct rt_device_pwm *device,
int cmd, void *arg)< / th > < / tr > < / thead > < tbody class = "- topic/tbody tbody" > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__1" > 功能说明< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__2" > （类似 ioctl 的接口方式）配置一个 XPWM/PWM 通道< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__1" > 参数定义< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__2" >
< div class = "- topic/div div" >
< div class = "- topic/div div" > device - 指向 XPWM/PWM 设备的指针< / div >
< div class = "- topic/div div" > cmd - ioctl 命令码< / div >
< div class = "- topic/div div" > arg - 命令参数，指向 struct rt_pwm_configuration 结构的指针< / div >
< / div >
< / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__1" > 返回值< / td > < td class = "- topic/entry entry colsep-0 rowsep-1" headers = "id__table_ejd_vj3_fdc__entry__2" > 0， ； < 0， < / td > < / tr > < tr class = "- topic/row" > < td class = "- topic/entry entry colsep-1 rowsep-0" headers = "id__table_ejd_vj3_fdc__entry__1" > 注意事项< / td > < td class = "- topic/entry entry colsep-0 rowsep-0" headers = "id__table_ejd_vj3_fdc__entry__2" > -< / td > < / tr > < / tbody > < / table > < / div > < / section > < section class = "- topic/section section" id = "id__hal" data-ofbid = "id__hal" > < h2 class = "- topic/title title sectiontitle" > HAL 层接口设计< / h2 >
< div class = "- topic/p p" data-ofbid = "d285672e165__20250121171754" > HAL 层的函数接口声明存放在 hal_xpwm.h
中，主要接口有：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "id__codeblock_xcb_wj3_fdc" data-ofbid = "id__codeblock_xcb_wj3_fdc" > < strong class = "hl-keyword" > void< / strong > hal_xpwm_ch_init(u32 ch, u32 default_level, < strong class = "hl-keyword" > enum< / strong > xpwm_polarity polarity);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_set(u32 ch, u32 duty_ns, u32 period_ns, u32 pulse_cnt);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_get(u32 ch, u32 *duty_ns, u32 *period_ns);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_enable(u32 ch);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_disable(u32 ch);
u32 hal_xpwm_int_stat(u32 ch);
< strong class = "hl-keyword" > void< / strong > hal_xpwm_int_clr(u32 ch, u32 mask);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_set_fifo(u32 ch, u32 pul_num, u32 pul_prd, u32 pul_cmp);
< strong class = "hl-keyword" > void< / strong > hal_xpwm_cnt_en(u32 ch, u32 val);
< strong class = "hl-keyword" > int< / strong > hal_xpwm_is_enable(u32 ch);
< strong class = "hl-keyword" > void< / strong > hal_xpwm_resume(u32 ch);
< strong class = "hl-keyword" > void< / strong > hal_xpwm_fifo_flush(u32 ch);
< strong class = "hl-keyword" > void< / strong > hal_xpwm_irq_en_set(u32 ch, < strong class = "hl-keyword" > struct< / strong > xpwm_int_s *xpwm_int);
bool hal_ch_is_xpwm(u32 ch);
< strong class = "hl-keyword" > int< / strong > xpwm_cal_prd_duty(u32 ch, u32 duty_ns, u32 period_ns);
#< strong class = "hl-keyword" > if< / strong > defined (AIC_XPWM_FIFO_MODE) & & defined (AIC_DMA_DRV)
< strong class = "hl-keyword" > void< / strong > hal_xpwm_dma_config(u32 ch, dma_async_callback callback, < strong class = "hl-keyword" > void< / strong > *callback_param);
#endif< / pre > < / div > < div class = "- topic/note note tip note_tip" id = "id__note_h4n_qn3_ddc" data-ofbid = "id__note_h4n_qn3_ddc" > < span class = "note__title" > 提示：< / span >
< p class = "- topic/p p" data-ofbid = "d285672e171__20250121171754" > 硬件上 PWM 与 XPWM 为同一模块共 24 路。 驱动中的 PWM 是使用 XPWM 的 PWM 功能来实现，软件上划分 0-7 路为 XPWM，
路为 PWM。< / p >
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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__id2" data-tocid = "id__id2" > 源码说明< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__id3" data-tocid = "id__id3" > 模块架构< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__id4" data-tocid = "id__id4" > 关键流程设计< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__id6" data-tocid = "id__id6" > 数据结构设计< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__driver" data-tocid = "id__driver" > Driver 层接口设计< / a > < / div > < / li > < li class = "section-item" > < div class = "section-title" > < a href = "#id__hal" data-tocid = "id__hal" > HAL 层接口设计< / a > < / div > < / li > < / ul > < / div >
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