Hi all, I have a problema using STM32F429 USART Hal functions in conjunction with a LIN device, using USART1.
I configure the peripheral as any other UART in the project, using a pattern like:
HAL_NVIC_SetPriority(LIN_UART_IRQ, 5, 0);
Then I try to send a message to a sensor and receive some byte in answer.
I send starting with
then HAL_UART_Transmit to send 0x55 and sensor identifier field.
I verified with an oscilloscope that some byte are indeed exchaged on the physical lines doing so, TX line of the microcontroller show this. But:
1. in case I execute a polling read using HAL_UART_Receive, I got 9 bytes with a wrong crc16.
2. In case I use HAL_UART_Receive_IT (calling the function before the syncronous transmit of course) I got a frame error.
I don't understand what is wrong with my configuration. Any guesses? thanks.