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请问28377D的ADCSOCAO如何配置?



现需要使用PWM来触发外置AD,但始终未配置成功

配置程序如下


void XBAR_ADCSOCAO_Init()
{
EALLOW;
GpioCtrlRegs.GPAGMUX2.bit.GPIO24 = 0x0;
GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 0x1; //Set GPIO24 to OUTPUTXBAR1
GpioCtrlRegs.GPADIR.bit.GPIO24 = 0x1;

OutputXbarRegs.OUTPUT1MUX0TO15CFG.bit.Mux13 = 0x1; //Set OUTPUTXBAR1 to MUX13.2-ADCSOCA
TrigRegs.EXTADCSOCSELECT.bit.PWM1SOCAEN = 0x1; //Set PWM1 as the ADCSOC triggle source

EPwm1Regs.ETSEL.bit.SOCAEN = 0x1; //Enable EPWM1 ADCSOC pluse
EPwm1Regs.ETSEL.bit.SOCASEL = 0X3; //Enable event counter on TBCTR = 0 or TBCTR = Peroid
EPwm1Regs.ETPS.bit.SOCAPRD = 0x1; //Generate SOC pluse on first event
EDIS;
}

EPWM1有正确输出

目前结果是已经可以在ETFLG中看到SOCA置1,但是GPIO24上没有对应的脉冲

请问还需要配置其他寄存器么?