topic Re: Could anyone tell me the sequence of operation to be followed in GPIO PIN interrupt in LPC1837 in LPC Microcontrollers

Could anyone tell me the sequence of operation to be followed in GPIO PIN interrupt in LPC1837

ponalagappan — Fri, 23 Sep 2016 05:49:49 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 );

/* 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 );

/* enable active HIGH level interrupt */

/*
LPC_GPIO_PIN_INT->IENF = ( GPIO_PIN_INT_IENF_ENAF0_Msk |
GPIO_PIN_INT_IENF_ENAF1_Msk );

LPC_GPIO_PIN_INT->SIENF = (GPIO_PIN_INT_SIENF_SETENAF0_Msk |
GPIO_PIN_INT_SIENF_SETENAF1_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));

Re: Could anyone tell me the sequence of operation to be followed in GPIO PIN interrupt in LPC1837

jeremyzhou — Tue, 27 Sep 2016 06:37:51 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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Re: Could anyone tell me the sequence of operation to be followed in GPIO PIN interrupt in LPC1837

ponalagappan — Tue, 27 Sep 2016 11:43:10 GMT

Thanks A Lot !!!!

It is very useful

Thanks

Alagappan

On Tue, Sep 27, 2016 at 12:09 PM, jeremyzhou <admin@community.freescale.com>