Not getting interrupt using GPIO PIN Interrupt in lpc1837 ?

ponalagappan — Fri, 23 Sep 2016 13:16:14 GMT

I am using LPC1837, i need to enable active low interrupt in individual GPIO PIN.

/* enable GPIO port clock */

GPIO_PortClock(1);

/* Set GPIO6[0] pin and GPIO6[2] as input */
GPIO_SetDir(6,0,GPIO_DIR_INPUT);
GPIO_SetDir(6,2,GPIO_DIR_INPUT);

/* enable pin as GPIO Mode pin in pin multiplexing*/
SCU_PinConfigure(0xC,1,( SCU_CFG_MODE_FUNC4 | SCU_SFS_EPUN | SCU_SFS_ZIF ));

SCU_PinConfigure(0xC,3,( SCU_CFG_MODE_FUNC4 | SCU_SFS_EPUN | SCU_SFS_ZIF ));

/* set values for PINTSEL0 to choose GPIO Port 6,pin no 0 on INTPIN0 */
SCU_PinInterruptSourceSelect(0x00, 0x06, 0x00);

/* set values for PINTSEL0 to choose GPIO Port 6,pin no 2 on INTPIN1 */
SCU_PinInterruptSourceSelect(0x01, 0x06, 0x02);

/* enable level interrupt */

LPC_GPIO_PIN_INT->ISEL = (GPIO_PIN_INT_ISEL_PMODE0_Msk |
GPIO_PIN_INT_ISEL_PMODE1_Msk);

/* enable level 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 );

/* IST setting immediately after setting SIENR bit, but my hardware pin state is HIGH only */

/* enable active LOW interrupt */

LPC_GPIO_PIN_INT->IENF = 0x00UL;

LPC_GPIO_PIN_INT->CIENF = (GPIO_PIN_INT_CIENF_CENAF0_Msk |
GPIO_PIN_INT_CIENF_CENAF1_Msk );

NVIC->ICPR[(((uint32_t)(int32_t)33) >> 5UL)] = (uint32_t)(1UL << (((uint32_t)(int32_t)33) & 0x1FUL));

NVIC->ISER[(((uint32_t)(int32_t)33) >> 5UL)] = (uint32_t)(1UL << (((uint32_t)(int32_t)33) & 0x1FUL));

Is that require to write IST->PSTATx to clear inside interrupt??

void GPIO1_IRQHandler(void)
{

/* write IST bits as 1 to clear the interrupt*/
LPC_GPIO_PIN_INT->IST = (GPIO_PIN_INT_IST_PSTAT0_Msk |
GPIO_PIN_INT_IST_PSTAT1_Msk);

}

To enable interrupt is that require any other preliminary settings required? Am i missing something??????

Re: Not getting interrupt using GPIO PIN Interrupt in lpc1837 ?

jeremyzhou — Tue, 27 Sep 2016 06:39:17 GMT

Hi,

I've already given the reply in the GPIO PIN interrupt is not working in LPC 1837 .

Please have a check.

Ping
Have a great day,
(my name)

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LPC MicrocontrollersのトピックRe: Not getting interrupt using GPIO PIN Interrupt in lpc1837 ?

Not getting interrupt using GPIO PIN Interrupt in lpc1837 ?

Re: Not getting interrupt using GPIO PIN Interrupt in lpc1837 ?