How reinit UART?

[EAlek.2]

1. After reset MCU init UART - 8bits, no parity bit, init DMA RX and TX, interrupts on - works Ok.
2. Reinit UART - 9 bits, even parity bit, no DMA - works Ok.
3. Reinit UART the same as p.1 - doesn't work interrupts.

[TDK]

Before reinitializing, reset the peripheral with the RCC force/release reset bits to get it back to the as-reset configuration.

__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();

The initialization is likely expecting this to be as-reset.

[Tesla DeLorean]

DMA would need to be 16-bit for the 9-bit mode.

Perhaps you could double check the content of the DMA controller registers, and share those. If this is a bug it could probably be added to the list.

[waclawek.jan]

> doesn't work interrupts

Which interrupts? How do you know they don't work?

Debug as usually: read out and check relevant UART, DMA, NVIC registers.

JW