simple GPIO interrupt example ?

johnbeale — Tue, 17 Nov 2015 01:16:38 GMT

I am using a Kinetis KL16Z128 processor, developing with KDS 3.0.0 and KSDK 1.2.0 / Processor Expert. I am looking for a simple project code example of a GPIO input pin triggering an interrupt. Is there one I can look at? So far I have:

Component Inspector:

gpio1:fsl_gpio Input pin "SYNC_IN" Interrupt/DMA: Interrupt on falling edge

main.h:

extern volatile uint32_t syncCount;

main.c:

syncCount = 0; // count of sync line input signals (updated in interrupt routine)

INT_SYS_EnableIRQ(PORTA_IRQn);

INT_SYS_EnableIRQGlobal();

do { various stuff... } while ( 1 ); // main loop

events.c:

void PORTA_IRQHandler(void) {

PORT_HAL_ClearPortIntFlag(PORTA_BASE);

syncCount++;

}

This compiles OK, and it runs, but I never see syncCount increment from 0, even though I am generating pulses on the PTA_4 input pin ("SYNC_IN") which I can detect using a normal port read from the main.c using GPIO_DRV_ReadPinInput(SYNC_IN).

I have read through the document Interrupt handling with KSDK and Kinetis Design Studio and it has useful information, but not quite enough for me to get a project working. Any suggestions would be appreciated. Thank you!

Re: simple GPIO interrupt example ?

Alice_Yang — Tue, 17 Nov 2015 02:18:13 GMT

Hello John,

- Could you please show your code clearly , or how do you configure the component of fsl_gpio .

- Under the SDK1.2 , there is a GPIO interrupt demo :

Freescale\KSDK_1.2.0\examples\frdmkl26z\driver_examples\gpio

this demo is about KL26, while the configuration is the same with KL16, you can refer to .

Hope it helps

Alice

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simple GPIO interrupt example ?

Re: simple GPIO interrupt example ?