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28335同步信号时钟EPWMxSYNCO

ruobing wang
Prodigy 30 points


请教一下，EPWMxSYNCO信号波形是不是应该是脉冲信号啊？

我按照以下程序输出的同步信号，用示波器看是一条3.3V的直线，

EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO；

EALLOW;

GpioDataRegs.GPBCLEAR.bit.GPIO33 = 1;

GpioCtrlRegs.GPBPUD.bit.GPIO33 = 1;

GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 2

EDIS;