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[bsp/stm32]优化功能(drv_pwm)：设置PWM频率和脉宽时不破坏上一个PWM周期 (#6129) 

* [bsp/stm32]优化功能(drv_pwm)：设置PWM频率和脉宽时不破坏上一个PWM周期
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BreederBai 2022-07-04 10:26:33 +08:00 committed by GitHub
parent b39210dea3
commit 78faea4b8d
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1 changed files with 5 additions and 3 deletions
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8
bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
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@ -330,10 +330,12 @@ static rt_err_t drv_pwm_set(TIM_HandleTypeDef *htim, struct rt_pwm_configuration
pulse = period;
}
__HAL_TIM_SET_COMPARE(htim, channel, pulse - 1);
__HAL_TIM_SET_COUNTER(htim, 0);
/* Update frequency value */
HAL_TIM_GenerateEvent(htim, TIM_EVENTSOURCE_UPDATE);
/* If you want the PWM setting to take effect immediately,
please uncommon the following code, but it will cause the last PWM cycle not complete. */
//__HAL_TIM_SET_COUNTER(htim, 0);
//HAL_TIM_GenerateEvent(htim, TIM_EVENTSOURCE_UPDATE); /* Update frequency value */
return RT_EOK;
}