STM32H743 STOP mode exit problem with LTDC

[sjkarthick]

Entered into low power STOP mode

HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);

Reconfigured LTDC when exiting from STOP mode, LTDC is not driving the display.

SystemClock_Config();

HAL_ResumeTick();

__enable_irq();

MX_LTDC_Init();

[FBL]

Hello @sjkarthick 

You need to configure system clock after wake-up from STOP: enable HSE, PLL ... 

You can try this example as a reference using RTC wakeup timer associated to EXTI line flag:

STM32Cube\Repository\STM32Cube_FW_H7_V1.11.1\Projects\STM32H743IEVAL\Examples\PWR\PWR_STOP_RTC