LPC1347 group pin int problem

lubo — Tue, 02 Aug 2016 21:41:07 GMT

Hi,

I have push buttons connected to ground on pins PIO0_1, PIO0_3 and PIO0_11. I want to use GROUP INTs on all three pins. If I use only 1 and 3 - it works! But if I include 11 - it doesn't.

Any help or ideas are appreciated! (tried software polling - everything is OK, they work, no hardware problems)

Regards,

L. B.

===========================================================================

#include "board.h"

#include "uart.h"

void GINT0_IRQHandler(void)

{

Chip_GPIOGP_ClearIntStatus(LPC_GPIO_GROUP_INT0, 0);

DEBUGOUT("INT\n\r");

}

int main(void)

{

SystemCoreClockUpdate();

Board_Init();

init_uart();

DEBUGOUT("Starting ...\n\r");

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 1, IOCON_FUNC0 | IOCON_MODE_PULLUP);

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 3, IOCON_FUNC0 | IOCON_MODE_PULLUP);

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 11, IOCON_FUNC1 | IOCON_MODE_PULLUP);

Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, 0, 1);

Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, 0, 3);

Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, 0, 11);

Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GROUP0INT);

Chip_GPIOGP_SelectLowLevel(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 1);

Chip_GPIOGP_SelectLowLevel(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 3);

Chip_GPIOGP_SelectLowLevel(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 11);

Chip_GPIOGP_EnableGroupPins(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 1);

Chip_GPIOGP_EnableGroupPins(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 3);

Chip_GPIOGP_EnableGroupPins(LPC_GPIO_GROUP_INT0, 0, 0, 1 << 11);

Chip_GPIOGP_SelectOrMode(LPC_GPIO_GROUP_INT0, 0);

Chip_GPIOGP_SelectEdgeMode(LPC_GPIO_GROUP_INT0, 0);

NVIC_EnableIRQ(GINT0_IRQn);

while (1) { }

return 0;

}

Re: LPC1347 group pin int problem

lubo — Wed, 03 Aug 2016 18:13:17 GMT

It appears that pins with both analog and digital function cannot use only this:

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 11, IOCON_FUNC1 | IOCON_MODE_PULLUP);

they must enable the digital circuitry explicitly like this:

Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 11, IOCON_FUNC1 | IOCON_MODE_PULLUP | IOCON_DIGMODE_EN);

This solved the problem for me! Hope it will help others too!

Cheerz,

L. B.

Re: LPC1347 group pin int problem

soledad — Wed, 03 Aug 2016 23:40:57 GMT

Hi L.B.,

Thank you for your input !!

Regards

Sol

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