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使用20049的PWM1和 PWM2控制全桥DCDC。
EPWM_1A、EPWM_2B为前半周期开通驱动; ZRO = SET,CAU = CLR
EPWM_1B、EPWM_2A为后半周期开通驱动; PRD = SET,CBD = CLR
CMPC = CAU/2:利用CMPC SOC触发AD采样,采样PWM开通中点的电感电流作为平均电流。
当HRPWM功能未开通时,电流采样和实际值一致。
当HRPWM功能开通后,电流采样是实际值有比较大的偏差。虽然CMPC的值不支持高精度,但是只和实际的中点差不到1个 PWM CNT的值,所以差距不会太大。
请问:是能HRPWM功能后,SOC触发AD采样需要什么特殊的配置吗?