新塘N76E003的PWM5和PWM4为什么不能用

只看该作者 · 2018-2-1 14:54

用N76E003配置输出PWM输出，使用PWM1，PWM2，PWM3都可以输出方波，但是使用PWM4和PWM5就不可以，很不理解。配置代码如下

Set_All_GPIO_Quasi_Mode;
/**********************************************************************
PWM frequency = Fpwm/((PWMPH,PWMPL) + 1) <Fpwm = Fsys/PWM_CLOCK_DIV>
= (22.1184MHz/8)/(0x3FF + 1)
= 2.7KHz
***********************************************************************/
PWM5_P15_OUTPUT_ENABLE;
PWM_INT_PWM5;
PWM_FALLING_INT; //Setting Interrupt happen when PWM0 falling signal

PWM_CLOCK_DIV_8;
PWMPH = 0x03; //Setting PWM period
PWMPL = 0xFF;
PWM5H = 0x01; //PWM0 high duty = 1/2 PWM period
PWM5L = 0xFF;

set_EPWM; //Enable PWM interrupt
set_EA;
set_LOAD;
set_PWMRUN;