USART1 working but USART2 and USART3 no

[LOnGr.1]

Hi!

I am working on a project where multiple sensors are connected to the stm32f4 transmistting data on a very high baud rate and then the received data is transmitted through USB VCP. For these matters I used DMA with USART1, USART2 and USART3 and implemented usb cdc. I created a circular buffer for each USART to receive the data and then send it via usb. Each time an idle line occurs, I calculate the head and length of the received packet and transmit it (all the calculations are inside the interruption).The thing is that I wanted to test each UART apart, and UART1 is working perfectly (I am receiving the data I want continiously ) but when I do exactly the same thing on UART2, I receive data once (approx 2000caracters) and then it stops. What can be the origin of such a problem? I checked the code multiple times and all the configurations are good. Maybe I am forgetting something

[TDK]

Check for an overrun condition on the ones that only work once. Check for other error conditions in either the DMA or UART registers.