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MSPM0G3507: Exit standby mode on MSPM0

Thierry LECARPENTIER
Prodigy 30 points
Part Number: MSPM0G3507

Tool/software: 

Hi experts,
Is it possible to exit standby mode with an instruction (like _BIC_SR_IRQ(CPUOFF); // Clear LPM from 0(SR) on an MSP430).
Thanks in advance.
/*
 * Exit_Standby.c
 *
 *  Created on: 7 août 2024
 *      Author: Test Team
 */

#include "ti_msp_dl_config.h"

volatile unsigned char RX_Data = 0;

int main(void)
{
    SYSCFG_DL_init();

    NVIC_ClearPendingIRQ(UART_0_INST_INT_IRQN);
    NVIC_EnableIRQ(UART_0_INST_INT_IRQN);
    DL_SYSCTL_enableSleepOnExit();

    while (1) {
        __WFI();
        DL_GPIO_togglePins(GPIO_LEDS_PORT,
            GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN);
    }
}

void UART_0_INST_IRQHandler(void)
{
    switch (DL_UART_Main_getPendingInterrupt(UART_0_INST)) {
        case DL_UART_MAIN_IIDX_RX:
            RX_Data = DL_UART_Main_receiveData(UART_0_INST);
            while (DL_UART_isBusy(UART_0_INST));
            DL_UART_Main_transmitData(UART_0_INST, RX_Data);

            if(RX_Data == "@")
            {
                // Exit standby mode only if RX car is "@"
            }
            break;
        default:
            break;
    }
}

  • +1
    TI__Genius 16000 points

    Hi Thierry,

    You can use the DL_SYSCTL_disableSleepOnExit() function to disable re-entering a low power mode in your interrupt service routine. If you'd like to re-enter a low power mode later, you can use the DL_SYSCTL_enableSleepOnExit() function again then use the WFE() or WFI() functions to actually enter the sleep mode.

  • 0 in reply to Dylan OBrien
    Prodigy 30 points 
    Hi Dylan
    DL_SYSCTL_disableSleepOnExit() in interrupt works perfectly.
Thank you so much.

    /*
 * Exit_Standby.c
 *
 *  Created on: 7 août 2024
 *      Author: Test Team
 */

#include "ti_msp_dl_config.h"

volatile unsigned char RX_Data = 0;

int main(void)
{
    SYSCFG_DL_init();

    NVIC_ClearPendingIRQ(UART_0_INST_INT_IRQN);
    NVIC_EnableIRQ(UART_0_INST_INT_IRQN);
    DL_SYSCTL_enableSleepOnExit();

    while (1) {
        __WFI();
        DL_GPIO_togglePins(GPIO_LEDS_PORT,
            GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN);
        DL_SYSCTL_enableSleepOnExit();
    }
}

void UART_0_INST_IRQHandler(void)
{
    switch (DL_UART_Main_getPendingInterrupt(UART_0_INST)) {
        case DL_UART_MAIN_IIDX_RX:
            RX_Data = DL_UART_Main_receiveData(UART_0_INST);
            while (DL_UART_isBusy(UART_0_INST));
            DL_UART_Main_transmitData(UART_0_INST, RX_Data);

            if(RX_Data == "@")
            {
                // Exit standby mode for toggle led in main only if RX car is "@"
                DL_SYSCTL_disableSleepOnExit();
            }
            break;
        default:
            break;
    }
}