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想请问一下，EPWM的计数方向能不能实现由向上计数模式开始，当计数器达到某一值时变为向下计数模式；当计数器等于0时再切换为向上计数模式，再达到某一值后变为向下计数模式，这样循环往复。
您好，可以实现的，您说的就是 向上-向下计数模式（Up-Down-Count Mode）。请参考TMS320F28004x Real-Time Microcontrollers Technical Reference Manual (Rev. D)第1780页：
