TMS570LS1224: NHET edge interrupt

Strong ZHANG

Part Number: TMS570LS1224

Hi Team,

when configure the both rising edge and falling edge interrupt as below, when interrupt occur, how to know the interrupt come from rising edge or falling edge?

over 6 years ago

0 QJ Wang over 6 years ago

TI__Guru**** 196246 points

Hello Strong,

The event triggering the counter will be rising and falling edge on the pin4.

0 Strong ZHANG over 6 years ago in reply to QJ Wang

TI__Expert 4400 points

Hi QJ,

Which flag can tell whether the interrupt come from rising edge or falling edge?

Strong

0 QJ Wang over 6 years ago in reply to Strong ZHANG

TI__Guru**** 196246 points

Hi Strong,

There is no flag associated to those edges. The interrupt is generated by either edge of the input signal. The NHET instruction which handles this input edge is ECNT.

N2HET interrupts can be generated by any instruction that has an interrupt enable bit in its instruction format. The number in HETOFF1 or HETOFF2 provides the number of the highest priority source instruction.

Please refer to Table 21-12: Interrupt Sources and Corresponding Offset Values in Registers HETOFFx

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TMS570LS1224: NHET edge interrupt