GINT configuration for LPC55S28 don't trigger interrupt from expander

[Am-Dev]

Hello.

I'm using a LPC55S28JBD100 and i'm trying to trigger an interrupt from a GINT, later on for wakeup it from power down, but it not trigger. The PCB have a button connected to an expander and then connected to the pin PIO1_30 of the micro, if i use a PINT for the interrupt it function right, but if i use a GINT it not work.

This is the configuration 

static void initWakeUpPins (bool exitLowPower)

{

CLOCK_EnableClock(kCLOCK_Iocon);

// Enables the clock for the GPIO0 module

CLOCK_EnableClock(kCLOCK_Gpio0);

CLOCK_EnableClock(kCLOCK_Gpio1);

IOCON->PIO[WAKEUP_DIG_IN_2_PORT][WAKEUP_DIG_IN_2_PIN] =

((IOCON->PIO[WAKEUP_DIG_IN_2_PORT][WAKEUP_DIG_IN_2_PIN] &

/* Mask bits to zero which are setting */

(~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK)))

| IOCON_PIO_MODE(0x0u) // No pullup

| IOCON_PIO_INVERT(0x0u) // Selects pin function.

| IOCON_PIO_FUNC(WAKEUP_DIG_IN_2_ALT_FUNC)

| IOCON_PIO_DIGIMODE(0x01u)); // Select Digital mode: Enable

IOCON->PIO[WAKEUP_INT_MCP_PORT][WAKEUP_INT_MCP_PIN] =

((IOCON->PIO[WAKEUP_INT_MCP_PORT][WAKEUP_INT_MCP_PIN] &

/* Mask bits to zero which are setting */

(~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK)))

| IOCON_PIO_MODE(0x0u) // No pullup

| IOCON_PIO_INVERT(0x0u) // Selects pin function.

| IOCON_PIO_FUNC(WAKEUP_INT_MCP_ALT_FUNC)

| IOCON_PIO_DIGIMODE(0x01u)); // Select Digital mode: Enable

IOCON->PIO[WAKEUP_WSN_BOARD_PORT][WAKEUP_WSN_BOARD_PIN] =

((IOCON->PIO[WAKEUP_WSN_BOARD_PORT][WAKEUP_WSN_BOARD_PIN] &

/* Mask bits to zero which are setting */

(~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK)))

| IOCON_PIO_MODE(0x0u) // No pullup

| IOCON_PIO_INVERT(0x0u) // Selects pin function.

| IOCON_PIO_FUNC(WAKEUP_WSN_BOARD_ALT_FUNC)

| IOCON_PIO_DIGIMODE(0x01u)); // Select Digital mode: Enable

GPIO_PinInit(WAKEUP_DIG_IN_2_GPIO,

WAKEUP_DIG_IN_2_PORT,

WAKEUP_DIG_IN_2_PIN,

&(gpio_pin_config_t){kGPIO_DigitalInput, 0});

GPIO_PinInit(WAKEUP_INT_MCP_GPIO,

WAKEUP_INT_MCP_PORT,

WAKEUP_INT_MCP_PIN,

&(gpio_pin_config_t){kGPIO_DigitalInput, 0});

GPIO_PinInit(WAKEUP_WSN_BOARD_GPIO,

WAKEUP_WSN_BOARD_PORT,

WAKEUP_WSN_BOARD_PIN,

&(gpio_pin_config_t){kGPIO_DigitalInput, 0});

// INPUTMUX_Init(INPUTMUX);

// INPUTMUX_AttachSignal(INPUTMUX, kPINT_PinInt0, WAKEUP_PINT_PIN_INT0_SRC);

// INPUTMUX_AttachSignal(INPUTMUX, kPINT_PinInt1, WAKEUP_PINT_PIN_INT1_SRC);

// INPUTMUX_AttachSignal(INPUTMUX, kPINT_PinInt2, WAKEUP_PINT_PIN_INT2_SRC);

// INPUTMUX_Deinit(INPUTMUX);

//

// PINT_Init(WAKEUP_PINT_PIN_INT_BASE);

// PINT_PinInterruptConfig(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt0, kPINT_PinIntEnableRiseEdge, App_mcpIsr);

// PINT_EnableCallbackByIndex(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt0);

// PINT_PinInterruptConfig(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt1, kPINT_PinIntEnableRiseEdge, App_mcpIsr);

// PINT_EnableCallbackByIndex(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt1);

// PINT_PinInterruptConfig(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt2, kPINT_PinIntEnableFallEdge, App_mcpIsr);

// PINT_EnableCallbackByIndex(WAKEUP_PINT_PIN_INT_BASE, kPINT_PinInt2);

GINT_Init(GINT0);

GINT_SetCtrl(GINT0, kGINT_CombineOr, kGINT_TrigEdge, App_mcpIsr);

GINT_ConfigPins(GINT0, kGINT_Port0,GINT0_POL_MASK, GINT0_ENA_MASK);

GINT_EnableCallback(GINT0);

}

then i call it in the main for the initialization.

Pressing the button go to the expander that generate the interrupt, this arrive to the micro but not trigger. Pressing a resistor nier the botton trigger it. What can be and someone know how resolve it?

[xiangjun_rong]

Hi,

I do not see any NVIC configuration, pls try to add the code:

NVIC_EnableIRQ(GINT0_IRQn);

Pls check if the interrupt happens or not.

If the GINT0 interrupt does not happen, pls check the GINT0->PORT_ENA1 register in the debugger.

Hope it can help you

BR

Xiangjun Rong