[参考译文] TMS320F280025C：ePWM 初始化问题

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https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1060504/tms320f280025c-epwm-initialisation-issues

器件型号：TMS320F280025C
主题中讨论的其他器件：LAUNCHXL-F280025C

你好。

我在设置 ePWM 模块时遇到了一些问题。

当 GPIO12和 GPIO13多路复用为 ePWM7时、下面针对 ePWM7的初始化代码片段正常工作、而当 GPIO28和 GPIO29多路复用为 ePWM7时则不能正常工作。

此外、相同的代码(复制和粘贴、除了改变时钟使能、引脚复用和寄存器文件)适用于 ePWM1至 ePWM4、但不适用于 ePWM5、ePWM6和 ePWM7。

如果情况很重要、我将在 LAUNCHXL-F280025C 上尝试这种方法。

我不知道我错过了什么-任何帮助都将不胜感激。

此致、

Vishnu

    EALLOW;
    CpuSysRegs.PCLKCR2.bit.EPWM7 = 1;

    GpioCtrlRegs.GPAGMUX2.bit.GPIO28 = 0x0;
    GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 0x3;
    GpioCtrlRegs.GPAGMUX2.bit.GPIO29 = 0x0;
    GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 0x3;
    GpioCtrlRegs.GPAQSEL2.bit.GPIO28=0x3;
    GpioCtrlRegs.GPAQSEL2.bit.GPIO29=0x3;

//    GpioCtrlRegs.GPAGMUX1.bit.GPIO12 = 0x0;
//    GpioCtrlRegs.GPAMUX1.bit.GPIO12 = 0x1;
//    GpioCtrlRegs.GPAGMUX1.bit.GPIO13 = 0x0;
//    GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 0x1;
//    GpioCtrlRegs.GPAQSEL1.bit.GPIO12=0x3;
//    GpioCtrlRegs.GPAQSEL1.bit.GPIO13=0x3;
    EDIS;

    EPwm7Regs.TBPRD = 500;

    EPwm7Regs.CMPA.bit.CMPA = 125;
    EPwm7Regs.CMPB.bit.CMPB = 250;

    EPwm7Regs.TBCTL.bit.CLKDIV = 0x0;
    EPwm7Regs.TBCTL.bit.HSPCLKDIV = 0x1;

    EPwm7Regs.TBCTL.bit.PHSEN=TB_DISABLE;
    EPwm7Regs.TBPHS.bit.TBPHS=0;

    EPwm7Regs.TBCTR=0;
    EPwm7Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN;

    EPwm7Regs.TBCTL.bit.PRDLD = TB_SHADOW;

    EPwm7Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
    EPwm7Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;

    EPwm7Regs.CMPCTL.bit.LOADAMODE = CC_CTR_ZERO; // load on CTR = Zero
    EPwm7Regs.CMPCTL.bit.LOADBMODE = CC_CTR_ZERO; // load on CTR = Zero

    EPwm7Regs.AQCTLA.bit.CAU = AQ_CLEAR;
    EPwm7Regs.AQCTLA.bit.CAD = AQ_SET;
    EPwm7Regs.AQCTLB.bit.CBU = AQ_CLEAR;
    EPwm7Regs.AQCTLB.bit.CBD = AQ_SET;

    EPwm7Regs.ETSEL.bit.SOCAEN=0;
    EPwm7Regs.ETSEL.bit.SOCASEL=1;
    EPwm7Regs.ETSOCPS.bit.SOCAPRD2=1;
    EPwm7Regs.ETSEL.bit.SOCAEN=1;

3 年多前