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LPC546XX: Add check for GPIO IRQ #6735

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merged 1 commit into from Apr 25, 2018
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LPC546XX: Add check for GPIO IRQ #6735

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6 changes: 6 additions & 0 deletions targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_LPC/gpio_irq_api.c
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Expand Up @@ -25,6 +25,8 @@
#include "fsl_pint.h"
#include "mbed_error.h"

#define INTERRUPT_PORTS 2
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I suppose all LPC targets only have two ports that are interruptible?

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Yes.


static uint32_t channel_ids[NUMBER_OF_GPIO_INTS] = {0};
static gpio_irq_handler irq_handler;
/* Array of PORT IRQ number. */
Expand Down Expand Up @@ -83,6 +85,10 @@ int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32
obj->pin = pin & 0x1F;
obj->port = pin / 32;

if (obj->port >= INTERRUPT_PORTS) {
return -1;
}

/* Connect trigger sources to PINT */
INPUTMUX_Init(INPUTMUX);

Expand Down