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TMS320F280039C: 移相角捕获功能实现

Part Number: TMS320F280039C

Hi experts:

我们在项目中有个需求,需要捕获PWM2相对于PWM1的滞后角度比,即(γ/2π),请问有什么方案可以实现吗?我有尝试用两个ecap模块分别去捕获PWM1和PWM2,捕获模式为EC_DELTA_MODE,但是不能保证两个模块时钟同步,所以没办法实现,帮忙看一下有无其他办法,谢谢!