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TMS320F28069: ADC 转换结果保持不变

Part Number: TMS320F28069


我在调试ADC 时,我让硬件人员给我灌了86Hz 的正弦信号,但ADC采集处理,会有台阶的现象:


我ADC 的主要配置如下:
SOC6 ~11 均通过EPWM 5 周期 200us 中断进行触发,,TRIGSEL = 13;

ACQPS = 6, ADC Clock =45M,

还有什么需要注意的吗? 可以改善这个情况?