21ic问答首页 - E503R,根据捕获的PWMA产生PWMB,发现AB相位差过大
E503R,根据捕获的PWMA产生PWMB,发现AB相位差过大 赏1000家园币
使用的是GD32E503R,PB10引脚对应timer1_CH2,用于捕获外部PWM信号A的上升沿和下降沿；待捕获信号是50%占空比的200KHZ的PWM信号A；PA8,对应的SHRTIMER_ST0CH0,用于产生PWM信号B；。目标是PB10捕获到上升沿、下降沿，PA8产生的PWM信号翻转一次电平。现在B不能准确跟随A，相位差过大。PA8的PWM.C配置是 outcfg_para.set_request = SHRTIMER_CHANNEL_SET_NONE ;
outcfg_para.reset_request = SHRTIMER_CHANNEL_RESET_NONE;
PB10的CAP.C，中断函数中， if ( fanzhuan==0 )
{
shrtimer_slavetimer_waveform_channel_software_request (SHRTIMER0,SHRTIMER_SLAVE_TIMER0, SHRTIMER_ST0_CH0,SHRTIMER_CHANNEL_SOFTWARE_SET);
fanzhuan=1;
}
else
{
shrtimer_slavetimer_waveform_channel_software_request (SHRTIMER0,SHRTIMER_SLAVE_TIMER0, SHRTIMER_ST0_CH0,SHRTIMER_CHANNEL_SOFTWARE_RESET);
fanzhuan=0;
}； Q420471259
outcfg_para.reset_request = SHRTIMER_CHANNEL_RESET_NONE;
PB10的CAP.C，中断函数中， if ( fanzhuan==0 )
{
shrtimer_slavetimer_waveform_channel_software_request (SHRTIMER0,SHRTIMER_SLAVE_TIMER0, SHRTIMER_ST0_CH0,SHRTIMER_CHANNEL_SOFTWARE_SET);
fanzhuan=1;
}
else
{
shrtimer_slavetimer_waveform_channel_software_request (SHRTIMER0,SHRTIMER_SLAVE_TIMER0, SHRTIMER_ST0_CH0,SHRTIMER_CHANNEL_SOFTWARE_RESET);
fanzhuan=0;
}； Q420471259
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