Part Number: MSPM0G3519
Tool/software:
I have a button configured as GPIO input on PA28 and labeled as MCU_BTNn in syscfg. This is an active low button that when I hold the button down for >3 secs, we call the below shutdown() function, which successfully shuts the application down but does not wake the application up when I press the button. I have verified on my scope that the button is pulling the i/o down to logic 0 when the button is pushed. Does anybody see any issues with my shutdown function that is not properly setting up the wakeup function for that pin?
void shutdown()
{
// operating mode SHUTDOWN
DL_GPIO_clearPins(GPIOC, DL_GPIO_PIN_5); // LED BLUE GPIO
DL_GPIO_clearPins(GPIOB, DL_GPIO_PIN_0); // DEBUG LED
// helpful info from my ti_msp_dl_config.h:
/* Defines for USER_BTN: GPIOA.28 with pinCMx 3 on package pin 3 */
// pins affected by this interrupt request:["USER_BTN"]
// #define MCU_BTNn_INT_IRQN (GPIOA_INT_IRQn)
// #define MCU_BTNn_INT_IIDX (DL_INTERRUPT_GROUP1_IIDX_GPIOA)
// #define MCU_BTNn_USER_BTN_IIDX (DL_GPIO_IIDX_DIO28)
// #define MCU_BTNn_USER_BTN_PIN (DL_GPIO_PIN_28)
// #define MCU_BTNn_USER_BTN_IOMUX (IOMUX_PINCM3)
DL_GPIO_initDigitalInputFeatures(MCU_BTNn_USER_BTN_IOMUX, DL_GPIO_INVERSION_DISABLE,
DL_GPIO_RESISTOR_NONE, DL_GPIO_HYSTERESIS_DISABLE, DL_GPIO_WAKEUP_ON_0);
for (int i=0; i<100000; i++) { __asm("nop"); } // pause a moment
DL_SYSCTL_setPowerPolicySHUTDOWN();
while (1)
{
__WFI(); /* Enter selected power policy */
}
}
