STM32L475 wake up from STOP 2 mode
HI ,
I am working with low power modes on STM32L475. The device doesn't wake up from STOP2 mode,
I am keeping the x-cubel4 examples as reference
en.stm32cubel4\STM32Cube_FW_L4_V1.14.0\Projects\NUCLEO-L476RG\Examples\PWR\PWR_STOP2_RTC.
My LED doesn't turn on after the time is elapsed, i don't know when my device has woken up, it says target not responding, I am having to erase the flash memory everytime i do this, i believe its going to STOP mode but not waking up, cannot understand whats wrong with below code which i am using.
while(1){
/* Insert 5 second delay */
HAL_Delay(5000);
/* Set all GPIO in analog state to reduce power consumption */
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
/* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
/* Note: Debug using ST-Link is not possible during the execution of this */
/* example because communication between ST-link and the device */
/* under test is done through UART. All GPIO pins are disabled (set */
/* to analog input mode) including UART I/O pins. */
GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Pin = GPIO_PIN_All;
HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOE, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOF, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOG, &GPIO_InitStructure);
HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
/* Disable GPIOs clock */
__HAL_RCC_GPIOA_CLK_DISABLE();
__HAL_RCC_GPIOB_CLK_DISABLE();
__HAL_RCC_GPIOC_CLK_DISABLE();
__HAL_RCC_GPIOD_CLK_DISABLE();
__HAL_RCC_GPIOE_CLK_DISABLE();
__HAL_RCC_GPIOF_CLK_DISABLE();
__HAL_RCC_GPIOG_CLK_DISABLE();
__HAL_RCC_GPIOH_CLK_DISABLE();
/* Disable all used wakeup source */
HAL_RTCEx_DeactivateWakeUpTimer(&hrtc);
HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0x0FFFF, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
printf("Entering stop1 mode....\r\n");
/* Enter STOP 2 mode */
HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
/* Re-configure the system clock to 80 MHz based on MSI, enable and
select PLL as system clock source (PLL is disabled in STOP mode) */
SYSCLKConfig_STOP();
/* Re-configure and turn on LED1 */
printf("Exiting stop1 mode....\r\n");
BSP_LED_Init(LED_GREEN);
BSP_LED_On(LED_GREEN);