各位专家您好，我在使用CH32V307的时候希望通过软件触发输出单脉冲信号，我的意思先初始化单脉冲，然后每隔一毫秒在PWM1,PWM2,PWM3,PWM4,输出一个脉冲信号，现在无法输出脉冲信号,烦请各位老师百忙之中指导，看看问题在哪哈。
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：
准备通过软件触发，网上说的是软件触发只需要再次使能Timer1即可。
//初始化TIMER1单脉冲信号输出
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;
//设置时钟为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);
}
//触发一个单脉冲
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路初始化默认低电平
stepper_one_pulse_init(0x0000);
while(1)
{
//延时1ms
Delay(1);
//4路PWM全部输出一个脉冲脉冲
stepper_one_pulse_start(1000);
}
}
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