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GPIO PIN interrupt IST flag is not setting in LPC 1837

Pon alagappan

Hi,

I am trying to enable GPIO PIN interrupts using following procedure, But not getting why flags in IST itself not setting.

Please anyone point what went wrong here

my code:

NVIC_DisableIRQ(PIN_INT0_IRQn); NVIC_DisableIRQ(PIN_INT1_IRQn);

/* enbale tx interrupt, rx interrupt for module 0 */ SCU_PinInterruptSourceSelect(0x00, 0x06, 0x00); SCU_PinInterruptSourceSelect(0x01, 0x06, 0x02);

/* enable edge interrupt */

LPC_GPIO_PIN_INT->ISEL = 0x00UL;

/* enable rising edge interrupt */

LPC_GPIO_PIN_INT->IENR = (GPIO_PIN_INT_IENR_ENRL0_Msk | GPIO_PIN_INT_IENR_ENRL1_Msk );

LPC_GPIO_PIN_INT->SIENR = (GPIO_PIN_INT_SIENR_SETENRL0_Msk | GPIO_PIN_INT_SIENR_SETENRL1_Msk );

/* enable falling edge interrupt */

LPC_GPIO_PIN_INT->IENF = (GPIO_PIN_INT_IENF_ENAF0_Msk | GPIO_PIN_INT_IENF_ENAF0_Msk);

LPC_GPIO_PIN_INT->SIENF = (GPIO_PIN_INT_SIENF_SETENAF0_Msk | GPIO_PIN_INT_SIENF_SETENAF1_Msk );

/* Clear pending interrupt of pin interrupt 1*/ NVIC->ICPR[1] = (1UL << 1);

/* set priority for pin interrupt 1 */
NVIC_SetPriority(0x21, 1);

/* enable pin interrupt - 0x21 */
NVIC->ISER[1] = (1UL << 1);