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void WSCH_PwmChannel(TIM_TypeDef *TIMx, uint16_t TIM_Channel_x, uint16_t TIM_PulseVal)
{
? ? TIM_OCInitTypeDef ? ? ? ? TIM_OCInitStructure;
? ??
? ? STM32_GPIO_Init(PIN_T38, GPIO_Mode_AF_PP);//引脚配置
?? ?
? ? //独立配置-PWM引脚
? ? TIM_OCInitStructure.TIM_Pulse = 0;//占空比=0，在下面的TIM_SetCompareX中设定
? ? TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//当计时器值小于比较器设定值时则TIMX输出脚此时输出有效高电位。
? ? TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;//关闭引脚输出
?? ?TIM_OCInitStructure.TIM_OutputNState = TIM_OutputState_Disable;//关闭引脚输出
? ? TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;//极性
? ? TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//极性
?? ?
?? ?//指定在空闲状态下的TIM输出比较引脚的状态。仅供TIM1和TIM8有效。
? ? //TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;//收到刹车信号后，空闲状态，输出低
? ? //TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//收到刹车信号后，空闲状态，输出低
?? ?
?? ?//配置以上参数
? ? TIM_OC2Init(TIMx, &TIM_OCInitStructure);//TIM_OC1Init TIM_OC2Init TIM_OC3Init TIM_OC4Init
?? ?
?? ?//其它配置
? ? TIM_OC2PreloadConfig(TIMx, TIM_OCPreload_Enable);//【独立配置】重装,最好开启，可以屏蔽
? ? TIM_ITConfig(TIMx, TIM_IT_CC2, DISABLE);//在定时器CC2溢出中断里面更新PWM,必须要
?? ?
?? ?//设定占空比
? ? TIM_SetCompare2(TIMx, TIM_PulseVal); //TIM_OCInitStructure.TIM_Pulse或TIMx->CCRx
?? ?
?? ?//开启那个引脚TIMx->CCER = 0x00000010;
? ? TIM_CCxCmd(TIMx, TIM_Channel_x, TIM_CCx_Enable);//TIM_OutputState
? ? TIM_CCxNCmd(TIMx, TIM_Channel_x, TIM_CCxN_Disable);//TIM_OutputNState
}
void WSCH_PwmInit(TIM_TypeDef *TIMx, uint16_t TIM_Prescaler, uint16_t TIM_Period)
{
? ? TIM_TimeBaseInitTypeDef ? TIM_TimeBaseInitStructure;
?? ?
? ? TIM_DeInit(TIMx);
? ? //全局配置-定时器
? ? TIM_TimeBaseInitStructure.TIM_Prescaler = TIM_Prescaler;
? ? TIM_TimeBaseInitStructure.TIM_Period = TIM_Period;
? ? TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;//【固定TIM_CounterMode_Up】
? ? TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;//【固定TIM_CKD_DIV1】
? ? TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;//【固定0】重复多少次来一次中断！
? ? TIM_TimeBaseInit(TIMx, &TIM_TimeBaseInitStructure);
? ? TIM_ARRPreloadConfig(TIMx, ENABLE);
? ??
? ? //TIM_CtrlPWMOutputs(TIMx, ENABLE);//【TIM1/8高级定时器才需要这句话】
? ? TIM_Cmd(TIMx, ENABLE);
}
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