I have an application running on an STM32F746-Discovery which works when flashed to the board (in both Debug and Release mode). The application uses AWE with FreeRTOS and uGFX as a graphics library.
However, when I disconnect the USB cable that I use to flash the board and reconnect either to the computer or a USB power supply although the application runs (graphics respond to touchscreen and the green LED slowly flashes) no sound is produced.
I have an earlier version of the application (with AWE and FreeRTOS but before I integrated uGFX) that does work after a power cycle.
I think I'm all out of ideas, can anyone offer a solution (please!) or where next I can troubleshoot.