Resolved! How to send a single USART character under interrupt, on an STM32H743?
I have the following code, which is *almost* always working. (It typically gets stuck after 10-100K characters.)void USART3_IRQHandler(void) { if (LL_USART_IsActiveFlag_TXE(USART3)) { stats.txe++; if (LL_USART_IsEnabledIT_TXE(USART3)) { LL_US...