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TMS570的PWM输入捕获无法识别断路故障

yuanqiang hu1
Prodigy 142 points

大家好！我在用HalCoGen里配置TMS570的PWM输入捕获功能，调用void capGetSignal(hetRAMBASE_t * hetRAM, uint32 cap, hetSIGNAL_t *signal)获取捕获的周期的占空比，调节输入信号的周期和占空比，可以实现准确测量。当断开输入的PWM时，发现调用void capGetSignal(hetRAMBASE_t * hetRAM, uint32 cap, hetSIGNAL_t *signal)得到得的值还是断开前的数值，请问软件上怎样做可以检测这种断线故障？