topic Cannot wake up 11u68 with pin interrupt by GPIO in LPC Microcontrollers

Cannot wake up 11u68 with pin interrupt by GPIO

leechen — Wed, 18 Apr 2018 01:19:26 GMT

I'm able to make my LPC11u68 into deep sleep mode, but i cannot wake it up. Can anyone help me?

The pin interrupt works if I don't put the MCU into Deep Sleep. However, I cannot wake up the MCU if putting it to deep sleep mode by interrupting with GPIO.

#define GPIO_PININT_PIN 0

#define GPIO_PININT_PORT 1

#define GPIO_PININT_INDEX 0

#define PININT_IRQ_HANDLER PIN_INT0_IRQHandler

#define PININT_NVIC_NAME PIN_INT0_IRQn

void PININT_IRQ_HANDLER(void)

{

Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(GPIO_PININT_INDEX));

}

int main(void)

{

CHIP_PMU_MCUPOWER_T crntPowerSetting;

SystemCoreClockUpdate();

Board_Init();

SysTick_Config(SystemCoreClock / 10000 / 30);

Chip_IOCON_PinMuxSet(LPC_IOCON, GPIO_PININT_PORT, GPIO_PININT_PIN,

(IOCON_FUNC0 | IOCON_MODE_PULLUP | IOCON_CLKDIV(0) | IOCON_S_MODE(3)));

Chip_GPIO_SetPinDIRInput(LPC_GPIO, GPIO_PININT_PORT, GPIO_PININT_PIN);

Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_PINT);

Chip_SYSCTL_SetPinInterrupt(GPIO_PININT_INDEX, GPIO_PININT_PORT, GPIO_PININT_PIN);

Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(GPIO_PININT_INDEX));

Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(GPIO_PININT_INDEX));

Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(GPIO_PININT_INDEX));

NVIC_ClearPendingIRQ(PININT_NVIC_NAME);

NVIC_EnableIRQ(PININT_NVIC_NAME);

Chip_SYSCTL_EnablePeriphWakeup(SYSCTL_WAKEUP_GPIOINT1);

crntPowerSetting = PMU_MCU_DEEP_SLEEP;

while (1) {

ProcessPowerState(crntPowerSetting);

}

return 0;

}

Re: Cannot wake up 11u68 with pin interrupt by GPIO

jeremyzhou — Fri, 20 Apr 2018 02:43:14 GMT

Hi Lee Chen,

Thank you for your interest in NXP Semiconductor products and

the opportunity to serve you.

To provide the fastest possible support, I'd highly recommend you to refer to the periph_pinint demo in the LPCOpen library.

LPCOpen Software for LPC11XX|NXP

TIC

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Re: Cannot wake up 11u68 with pin interrupt by GPIO

magicoe_niu — Mon, 23 Apr 2018 02:55:10 GMT

i intend use pin interrupt to wake-up MCU from power down modes.

Feel the pin interrupt can not wake up MCU from deep sleep and power down modes, after check your post content and the UM.

Only Group interrupt can help us wake up MCU from DSleep and Pdown modes.

Thank refer my codes as attached.

Thank you!