Hello, see here:DMA2D_IRQHandler called with empty ISR register · Issue #31 · STMicroelectronics/stm32h7xx_hal_driver · GitHubor the latest answer in this thread:UI stuck in takeFrameBufferSemaphore - Page 7 - STMicroelectronics Community

Hello,same issue. Did you find a solution?

Hello,same issue. Even the STM32CubeProgrammer fail to read. Do you find a solution?

Same question for me.. did you find a workaround?

Thanks, it works! I only had to add "CLEAR_BIT(DBGMCU->CR, DBGMCU_CR_DBG_STANDBY);" before entering in standby mode, otherwise the OB programming procedure did not works. (Thanks to the comment of @Andreas Bolsch​ )