__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, val); 1. 正点原子mini板的PA8是led灯,定时器3的PWM输出通道2是PA7,所以在板子上用跳线帽将PA8和PA7连接起来即可: int main(void) { uint8_t mode = 1; uint32_t led0pwmval = 0; int i = 0; HAL_Init(); SystemClock_Config(); MX_GPI...