Resolved! QSPI TCIE self clearing? STM32H743I QSPI peripheral sometimes hangs Writing to external flash via QSPI transmit using MDMA and both MDMA and QSPI interrupts. Sometimes the QSPI peripheral gets hung up indefinitely.
With the ICD I found that sometimes, between the MDMA IRQ Handler - where the QSPI TCIE bit is set, and the QUADSPI_IRQHandler, the TCIE bit is cleared. But I haven't been able to determine where or how it is being cleared; I've eliminated all loca...