The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

daisukefukuda_n — Fri, 08 Feb 2019 11:31:21 GMT

Dear Sir/Madam,

This is Daisuke FUKUDA with NEXTY Electronics Japan. Thank you for your support.

I'm developing a certain demo board with LPCxpresso11U68. I designed that PIO_0_23 was IRQ from an IC.

I'm checking whether the interrupt handler is called correctly when PIO_0_23 is asserted. I'm using periph_pinint in lpcopen_3_02_lpcxpresso_lpcxpresso_11u68.zip. However the interrupt handler isn't called when PIO_0_23 is assinged. Also, I found the interrupt handler was called corrently when PIO_0_1, PIO_0_2, PIO_1_5 and PIO_1_6 were assigned. I tried 3 lpcxpressos but the phenomenon is reproduced.

Of cource, I'm going to all of PIOs but it isn't called when PIO_0_23 may be assigned.

Below is my modified code. Only GPIO_PININT_PIN and GPIO_PININT_PORT were changed.

Are there anything incorrect to modify for me?

/*
* @brief Pin Interrupt example
*
* @note
* Copyright(C) NXP Semiconductors, 2013
* All rights reserved.
*
* @par
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* LPC products. This software is supplied "AS IS" without any warranties of
* any kind, and NXP Semiconductors and its licensor disclaim any and
* all warranties, express or implied, including all implied warranties of
* merchantability, fitness for a particular purpose and non-infringement of
* intellectual property rights. NXP Semiconductors assumes no responsibility
* or liability for the use of the software, conveys no license or rights under any
* patent, copyright, mask work right, or any other intellectual property rights in
* or to any products. NXP Semiconductors reserves the right to make changes
* in the software without notification. NXP Semiconductors also makes no
* representation or warranty that such application will be suitable for the
* specified use without further testing or modification.
*
* @par
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors' and its
* licensor's relevant copyrights in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers. This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
*/

#include "board.h"

/*****************************************************************************
* Private types/enumerations/variables
****************************************************************************/

#if defined(BOARD_MANLEY_11U68)
/* GPIO pin for PININT interrupt */
#define GPIO_PININT_PIN     1 /* GPIO pin number mapped to PININT */
#define GPIO_PININT_PORT    0 /* GPIO port number mapped to PININT */
#define GPIO_PININT_INDEX   0 /* PININT index used for GPIO mapping */
#define PININT_IRQ_HANDLER PIN_INT0_IRQHandler /* GPIO interrupt IRQ function name */
#define PININT_NVIC_NAME    PIN_INT0_IRQn /* GPIO interrupt NVIC interrupt name */

#elif defined(BOARD_NXP_LPCXPRESSO_11U68)
/* Mapped to PIO0_1, ISP_EN button on LPCXpresso board */
//#define GPIO_PININT_PIN     1 /* GPIO pin number mapped to PININT */
#define GPIO_PININT_PIN     23 /* GPIO pin number mapped to PININT */
//#define GPIO_PININT_PIN     5 /* GPIO pin number mapped to PININT */
#define GPIO_PININT_PORT    0 /* GPIO port number mapped to PININT */
//#define GPIO_PININT_PORT    1 /* GPIO port number mapped to PININT */
#define GPIO_PININT_INDEX   0 /* PININT index used for GPIO mapping */
#define PININT_IRQ_HANDLER PIN_INT0_IRQHandler /* GPIO interrupt IRQ function name */
#define PININT_NVIC_NAME    PIN_INT0_IRQn /* GPIO interrupt NVIC interrupt name */

#else
#error "PININT not configured for this example"
#endif /* defined (BOARD_MANLEY_11U68) */

/*****************************************************************************
* Public types/enumerations/variables
****************************************************************************/

/*****************************************************************************
* Private functions
****************************************************************************/

/*****************************************************************************
* Public functions
****************************************************************************/

/**
* @brief Handle interrupt from GPIO pin or GPIO pin mapped to PININT
* @return Nothing
*/
void PININT_IRQ_HANDLER(void)
{
Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
Board_LED_Toggle(0);
}

/**
* @brief Main program body
* @return Does not return
*/
int main(void)
{
/* Generic Initialization */
SystemCoreClockUpdate();

/* Board_Init calls Chip_GPIO_Init and enables GPIO clock if needed,
Chip_GPIO_Init is not called again */
Board_Init();
Board_LED_Set(0, false);

/* We'll use an optional IOCON filter (0) with a divider of 64 for the
input pin to be used for PININT */
// Chip_Clock_SetIOCONFiltClockDiv(0, 64);

#if defined(BOARD_MANLEY_11U68)
/* Configure GPIO pin as input */
Chip_GPIO_SetPinDIRInput(LPC_GPIO, GPIO_PININT_PORT, GPIO_PININT_PIN);

/* Configure pin as GPIO with pullup and use optional IOCON divider
0 with 3 filter clocks for input filtering */
Chip_IOCON_PinMuxSet(LPC_IOCON, GPIO_PININT_PORT, GPIO_PININT_PIN,
(IOCON_FUNC0 | IOCON_MODE_PULLUP | IOCON_CLKDIV(0) | IOCON_S_MODE(3)));

#elif defined(BOARD_NXP_LPCXPRESSO_11U68)
/* Configure GPIO pin as input */
Chip_GPIO_SetPinDIRInput(LPC_GPIO, GPIO_PININT_PORT, GPIO_PININT_PIN);

/* Enable PININT clock */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PINT);

/* Configure interrupt channel for the GPIO pin in SysCon block */
Chip_SYSCTL_SetPinInterrupt(GPIO_PININT_INDEX, GPIO_PININT_PORT, GPIO_PININT_PIN);

/* Configure channel interrupt as edge sensitive and falling edge interrupt */
Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(GPIO_PININT_INDEX));

/* Enable interrupt in the NVIC */
NVIC_ClearPendingIRQ(PININT_NVIC_NAME);
NVIC_EnableIRQ(PININT_NVIC_NAME);

/* Go to sleep mode - LED will toggle on each wakeup event */
while (1) {
/* Go to sleep state - will wake up automatically on interrupt */
Chip_PMU_SleepState(LPC_PMU);
}

return 0;
}

Best regards,

Fukuda

Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

Alice_Yang — Thu, 14 Feb 2019 09:15:42 GMT

Hello Daisuke Fukuda,

Thanks to contact our technical support.

PIO_0_1 is standard digital I/O pin, while PIO_0_23 is digital /analog multiplexing pin,

so we need to disable Analog function and enable digital function when using GPIO interrupt.

Just add the below code , it will work:

Chip_IOCON_PinMuxSet(LPC_IOCON, GPIO_PININT_PORT, GPIO_PININT_PIN,
(0x80|IOCON_FUNC0 | IOCON_MODE_PULLUP | IOCON_CLKDIV(0) | IOCON_S_MODE(3)));

Also you can have a look at the register of 6.5.2 Pin control registers for digital/analog I/O pins of User Manual:

Have a great day,
TIC

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Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

daisukefukuda_n — Fri, 15 Feb 2019 01:49:01 GMT

Hi Ms. Alice,

This is Daisuke FUKDUA with NEXTY Electronics Japan. Thnak you for your prompt reply.

Once enabling digital IO in PIO_0_23, I was able to find the handler was called successfully.

Your answer is what I was looking for, thanks!!

Please close it.

Best regards,

Fukuda

Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

Alice_Yang — Fri, 15 Feb 2019 10:14:22 GMT

Hi Fukuda,

OK , good to hear it work.

Alice

LPC MicrocontrollersのトピックThe interrupt handler isn't called when PIO_0_23 is assigned as a PINT

The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT

Re: The interrupt handler isn't called when PIO_0_23 is assigned as a PINT