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ccs超声波测距

求问怎么读取一个脉冲的时间,是使用

void 

pwmGetSignal (hetRAMBASE_t *hetRAM, uint32 pwm, hetSIGNAL_t *signal)

这个函数吗?

如果是的话,那么脉冲时间是哪个变量呢?谢谢!