各位專家您好，我在使用CH32V307的時(shí)候希望通過(guò)軟件觸發(fā)輸出單脈沖信號(hào)，我的意思先初始化單脈沖，然后每隔一毫秒在PWM1,PWM2,PWM3,PWM4,輸出一個(gè)脈沖信號(hào)，現(xiàn)在無(wú)法輸出脈沖信號(hào),煩請(qǐng)各位老師百忙之中指導(dǎo)，看看問(wèn)題在哪哈。
我是用的TIMER1，然后需要IO口重定向到 PE14,PE13,PE11,PE9上面，
我的程序如下：
準(zhǔn)備通過(guò)軟件觸發(fā)，網(wǎng)上說(shuō)的是軟件觸發(fā)只需要再次使能Timer1即可。
? ?
//初始化TIMER1單脈沖信號(hào)輸出
void?stepper_one_pulse_init(uint16_t?PolarityPins)
{
????const?uint16_t?arr=0xffff;
????const?uint16_t?ccp=0xffff;
????GPIO_InitTypeDef?GPIO_InitStructure={0};
????TIM_OCInitTypeDef?TIM_OCInitStructure={0};
????TIM_ICInitTypeDef?TIM_ICInitStructure={0};
????TIM_TimeBaseInitTypeDef?TIM_TimeBaseInitStructure={0};
????RCC_APB2PeriphClockCmd(?RCC_APB2Periph_GPIOE,?ENABLE?);
????RCC_APB1PeriphClockCmd(?RCC_APB2Periph_TIM1,?ENABLE?);
????GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_11|GPIO_Pin_9;
????GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AF_PP;
????GPIO_InitStructure.GPIO_Speed?=?GPIO_Speed_50MHz;
????GPIO_Init(?GPIOE,?&GPIO_InitStructure?);
????//重定向TIMER1
????AFIO->PCFR1|=(0x3<<6);
????
????TIM_TimeBaseInitStructure.TIM_Period?=?arr;
????//TIM_TimeBaseInitStructure.TIM_Prescaler?=?psc;
????//設(shè)置時(shí)鐘為8M,TIMER_COUNTER_FREQ=8000000
????TIM_TimeBaseInitStructure.TIM_Prescaler?=
????????????????(int)?(((((float)?SystemCoreClock)?/?TIMER_COUNTER_FREQ))?+?0.5f)
????????????????????????-?1;
????TIM_TimeBaseInitStructure.TIM_ClockDivision?=?TIM_CKD_DIV1;
????TIM_TimeBaseInitStructure.TIM_CounterMode?=?TIM_CounterMode_Up;
????TIM_TimeBaseInit(?TIM1,?&TIM_TimeBaseInitStructure);
????TIM_ARRPreloadConfig(TIM1,?DISABLE);
????TIM_OCInitStructure.TIM_OCMode?=?TIM_OCMode_PWM2;
????TIM_OCInitStructure.TIM_OutputState?=?TIM_OutputState_Enable;
????TIM_OCInitStructure.TIM_Pulse?=?ccp;
????TIM_OCInitStructure.TIM_OCPolarity?=?(PolarityPins&0x08)???TIM_OCPolarity_High:TIM_OCPolarity_Low;
????TIM_OC1Init(TIM1,?&TIM_OCInitStructure);
????TIM_OCInitStructure.TIM_OCPolarity?=?(PolarityPins&0x04)???TIM_OCPolarity_High:TIM_OCPolarity_Low;
????TIM_OC2Init(TIM1,?&TIM_OCInitStructure);
????TIM_OCInitStructure.TIM_OCPolarity?=?(PolarityPins&0x02)???TIM_OCPolarity_High:TIM_OCPolarity_Low;
????TIM_OC3Init(TIM1,?&TIM_OCInitStructure);
????TIM_OCInitStructure.TIM_OCPolarity?=?(PolarityPins&0x01)???TIM_OCPolarity_High:TIM_OCPolarity_Low;
????TIM_OC4Init(TIM1,?&TIM_OCInitStructure);
????TIM_SelectOnePulseMode(?TIM1,TIM_OPMode_Single);
}
//觸發(fā)一個(gè)單脈沖
void?stepper_one_pulse_start(uint16_t?arr)
{
????TIM_Cmd(TIM1,?DISABLE);
????TIM1->CNT=0;
????TIM1->ATRLR=(arr<<1)+(arr<<2);
????TIM1->CH1CVR=TIM1->ATRLR>>1;
????TIM1->CH2CVR=TIM1->ATRLR>>1;
????TIM1->CH3CVR=TIM1->ATRLR>>1;
????TIM1->CH4CVR=TIM1->ATRLR>>1;
????TIM_Cmd(TIM1,?ENABLE);
}
OneTimeTest()
{
??//4路初始化默認(rèn)低電平
??stepper_one_pulse_init(0x0000);
??while(1)
??{
?????//延時(shí)1ms
?????Delay(1);
?????//4路PWM全部輸出一個(gè)脈沖脈沖
?????stepper_one_pulse_start(1000);
??}
}
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