I am having problem of receiving characters from ADUCM360. I am using HAL_UART_Receive_DMA for USART2 but I am receiving one character from ADUCM360 to STM32. I can see the characters transmit from ADUCM360 using putty.

[cjaya.1]

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[JPeac.1]

The ST USART will halt DMA if a receive error occurs. Do you have interrupts enabled for USART RX errors, and do you check/clear the USART status if an error does occur? If not, you will never get past the first time a parity/framing/overrun error occurs.

I've seen this many times, where clock jitter in the baud rate clock causes a framing or overrun error. Putty on a PC isn't using the same baud rate generator as the ST, so the fact it works with a PC would tend to point to the USART clock rate. Are you using HSI for the clock source? The oscillator tolerance is significant at high USART baud rates.

[cjaya.1]

Thank you for the reply. Yes I am using HSI for the clock source. How can I overcome this overrun error?. How can I clear the USART status if an error does occur?

[Tesla DeLorean]

Duplicative questions, not identifying "STM32" in question

https://community.st.com/s/question/0D53W00001pZG2XSAW/i-am-having-difficulty-receiving-data-on-

usart2-it-is-receiving-one-character-when-i-use-haluartreceiveit-interrupts-i-am-trying-to-receive-some-characters-from-aducm360-usart