MSP432E401Y: SimpleLink GPIO API - Any way to detect which edge caused an interrupt?

figsys66

Part Number: MSP432E401Y

Is there a ways using SimpleLink SDK GPIO API to detect which edge has caused an ISR in the callback function when both transitions are enabled? Suppose can read the GPIO input (or other register) at the ISR but looking for a direct method to reduce ISR latency. Tx!

over 5 years ago

0 Eason Zhou over 5 years ago

TI__Mastermind 39875 points

Hi,

No, the driverlib doesn't support this function. You need to judge it by yourself by reading the registers, if you choose 2 edge interrupt.

Eason

0 figsys66 over 5 years ago in reply to Eason Zhou

Prodigy 20 points

Thanks for the reply. These registers are "set" only I believe and thus reading GPIOIEV does not get the edge of the interrupt. If I follow the demo in driverlib\gpio_bothedge_interrupt I need to read the actual state of the input which introduces a delay. Is there any register that captures the edge?

0 Eason Zhou over 5 years ago in reply to figsys66

TI__Mastermind 39875 points

If you want to short the delay. You can use register level code. From this view, you read the register GPIODATA or any other one, take the same time.

Eason

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MSP432E401Y: SimpleLink GPIO API - Any way to detect which edge caused an interrupt?