RTOS/MSP432P401R: Interrupt Service Routine (ISR) never called in NO-RTOS based project ( after including TI-RTOS)

Hello,

Based on your response from this post, you picked TI-RTOS, therefore please do the following:

1. Start with the fatsdraw example (brand new).

• Import the project into CCS and make sure you can write/read to the sdcard

2. Using the gpiointerrupt example as reference, do the following in your fatsdraw project:

• In fatsdraw.c add the following code (inside your mainThread after GPIO_init)

    /* Turn on user LED */
    GPIO_write(Board_GPIO_LED0, Board_GPIO_LED_ON);

    /* install Button callback */
    GPIO_setCallback(Board_GPIO_BUTTON0, gpioButtonFxn0);

    /* Enable interrupts */
    GPIO_enableInt(Board_GPIO_BUTTON0);

• Also make sure you add this function

/*
 *  ======== gpioButtonFxn0 ========
 *  Callback function for the GPIO interrupt on Board_GPIO_BUTTON0.
 */
void gpioButtonFxn0(uint_least8_t index)
{
    /* Clear the GPIO interrupt and toggle an LED */
    GPIO_toggle(Board_GPIO_LED0);
}

• Note: Please keep in mind that by default the board file "MSP_EXP432P401R.c" initialize P1.1 and P1.4 as inputs and as external interrupts (gpioPinConfigs). If for some reason you want to use a different GPIO, you will need to modify this table.
• Build your project and make sure that your LED0 toggles every time you press S1

For more information, please take a look at this SimpleLink Academy training - Learn how to setup GPIO interrupts using TI Drivers with the SimpleLink SDK

3. Now the only thing missing is to enable the deep sleep mode, and I will use I'll use the powersleep example as reference:

• Please add this code in fatsdraw.c, we will use S2 to enable the deep sleep policy.

    GPIO_setCallback(Board_GPIO_BUTTON1, gpioButtonFxn1);
    GPIO_enableInt(Board_GPIO_BUTTON1);

• Also, make sure to add this function:

void gpioButtonFxn1(uint_least8_t x)
{
    GPIO_clearInt(Board_GPIO_BUTTON1);

    /* Put all GPIOs in lowest power configuration. This is done by MSP432 specific driverlib accesses*/
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PA, PIN_ALL16);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PB, PIN_ALL16);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PC, PIN_ALL16);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PD, PIN_ALL16);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PE, PIN_ALL16);
    MAP_GPIO_setOutputLowOnPin(GPIO_PORT_PJ, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PA, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PB, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PC, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PD, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PE, PIN_ALL16);
    MAP_GPIO_setAsOutputPin(GPIO_PORT_PJ, PIN_ALL16);


    /* Turn off PSS high-side supervisors to consume lower power after deep sleep */
    MAP_PSS_disableHighSide();

    /* Select PowerMSP432_deepSleepPolicy to enable transition
     * into the PowerMSP432_DEEPSLEEP_1 (LPM4)state
     */
    Power_setPolicy((Power_PolicyFxn)PowerMSP432_deepSleepPolicy);

    /* Refer to Device datasheet for Wake-up Sources From Low Power Modes to wake up from
     * PowerMSP432_DEEPSLEEP_1
     */
}

• So after you press S2, the device will be entering to LPM4 and you can use S1 to wake it up and toggle a LED0

You may also want to take a look at this other SimpleLink Academy Training - A simple Thermostat example which introduces multi-threading using the POSIX API calls because you may want to add more threads to your system.

  Hopefully this helps.

    David