Hello ST Community,
I'm trying to get started with the HAL-Library using CubeMX on an STM32F4-Discovery board. I'm using the UART interface USART2 and try to receive data via interrupts. The interrupts are fired as usual (so i think my configuration works).
But when the HAL-Driver calls HAL_UART_IRQHandler(&huart2) in stm32f4xx_it.c, the RXNE-flag is cleared, and the processing of the flag inside HAL_UART_IRQHandler(&huart) fails. I know, that the RXNE flag is cleared by hardware, when the SR-register is read. But in my case, the RXNE-flag is cleared right at the moment of the function-call.
As a result, the function UART_Receive_IT() is never called; same with the callback-function. Has anyone any idea what I am doing wrong? Or is there a bug in the HAL-library?
I've tried to use the example of the library for UART on an STM32F4-Discovery, but there is the same problem.
Thank you very much in advance!