28379D

user5977653

在初始化时将GPIO口配置为PWM模式还能在设定数据寄存器的值为1吗？如下：

GpioCtrlRegs.GPAGMUX1.bit.GPIO0 = 0;
GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 1; //配置为EPWM1A
GpioCtrlRegs.GPAPUD.bit.GPIO0 = 1; //关闭上拉；

GpioDataRegs.GPASET.bit.GPIO0= 1; //默认输出设置为1

5 年多前

0 Susan Yang 5 年多前

TI__Guru**** 252096 points

已经设置为PWM输出的话，是不可以在设定数据寄存器的值的。

例程中的配置如下

//
// InitEPwm3Gpio - Initialize EPWM3 GPIOs
//
void InitEPwm3Gpio(void)
{
    EALLOW;

    //
    // Disable internal pull-up for the selected output pins
    //   for reduced power consumption
    // Pull-ups can be enabled or disabled by the user.
    // This will enable the pullups for the specified pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPAPUD.bit.GPIO4 = 1;    // Disable pull-up on GPIO4 (EPWM3A)
    GpioCtrlRegs.GPAPUD.bit.GPIO5 = 1;    // Disable pull-up on GPIO5 (EPWM3B)

    //
    // Configure EPwm-3 pins using GPIO regs
    // This specifies which of the possible GPIO pins will be EPWM3 functional pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPAMUX1.bit.GPIO4 = 1;   // Configure GPIO4 as EPWM3A
    GpioCtrlRegs.GPAMUX1.bit.GPIO5 = 1;   // Configure GPIO5 as EPWM3B

    EDIS;
}