F28379d学习笔记之epwm配置（基于CCS Theia）

f28379d模块及时钟同步学习笔记

原创已于 2024-09-26 19:27:31 修改 · 1.1k 阅读

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#学习 #笔记

于 2024-09-26 16:15:58 首次发布

1.时基模块TB

1.1频率周期计算

1.1.1对于向上/向下技术模式

1.1.2对于up-down计数模式

其中

需要注意的是，在f28379d的时钟树中，EPWMCLK = 100MHz

对应CCS theia的配置

    EPWM_setTimeBasePeriod(base, EPWM_TIMER_TBPRD);
    EPWM_setPhaseShift(base, 0U);
    EPWM_setTimeBaseCounter(base, 0U); 
    EPWM_setTimeBaseCounterMode(base, EPWM_COUNTER_MODE_UP);
    EPWM_disablePhaseShiftLoad(base);
    EPWM_setClockPrescaler(base,EPWM_CLOCK_DIVIDER_8,EPWM_HSCLOCK_DIVIDER_1);

2.计数比较模块CC

    EPWM_setCounterCompareValue(base,EPWM_COUNTER_COMPARE_A,69);
    EPWM_setCounterCompareValue(base,EPWM_COUNTER_COMPARE_B,69);

3.动作模块AC

    EPWM_setActionQualifierAction(base,
                                  EPWM_AQ_OUTPUT_A,
                                  EPWM_AQ_OUTPUT_HIGH,
                                  EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(base,
                                  EPWM_AQ_OUTPUT_B,
                                  EPWM_AQ_OUTPUT_HIGH,
                                  EPWM_AQ_OUTPUT_ON_TIMEBASE_ZERO);
    EPWM_setActionQualifierAction(base,
                                  EPWM_AQ_OUTPUT_A,
                                  EPWM_AQ_OUTPUT_LOW,
                                  EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPA);
    EPWM_setActionQualifierAction(base,
                                  EPWM_AQ_OUTPUT_B,
                                  EPWM_AQ_OUTPUT_LOW,
                                  EPWM_AQ_OUTPUT_ON_TIMEBASE_UP_CMPB);