Uart Parity and Data bit issue in STM32C0 Series

[praveen2]

Hi all,i am using STM32C011F4U6 and i want communication between Uart1 _baud rate -115200 _8N1 and Uart2_Baud rate _4800_7E1.But STM32C0 haven't 7 bit communication option. How can i do this?

Thank you

[Peter BENSCH]

Welcome @praveen2, to the community!

first of all: please don't post the same question twice.

Then: what makes you think that the C011 cannot be set to 7bit?
As @Tesla DeLorean explained in the other thread, you have to programme a word length of 8 bits for 7N1. The RM0490 also mentions under USART main features: Programmable data word length (7, 8 or 9 bits).

Does it answer your question?

Regards
/Peter

[TDK]

CubeMX settings for 7E1 are as follows:

Note that "word length" includes the parity bit.

[Tesla DeLorean]

>>i want communication between

How exactly?

The data rates are significantly different, so you'll likely need some depth of buffering to cope, as long as the overall volume is manageable.

You want to forward data between the two UARTs? One direction, or both?

Writing code will be easier if you can clearly communicate what the actual task is. Perhaps draw a diagram if that's helpful. Break the problem in to pieces.

[Tesla DeLorean]

Rest-of-World

8E1

ST

UartHandle.Init.WordLength = UART_WORDLENGTH_9B; // 8+Parity
UartHandle.Init.StopBits = UART_STOPBITS_1;
UartHandle.Init.Parity = UART_PARITY_EVEN;

Rest-of-World

7E1

ST

UartHandle.Init.WordLength = UART_WORDLENGTH_8B; // 7+Parity
UartHandle.Init.StopBits = UART_STOPBITS_1;
UartHandle.Init.Parity = UART_PARITY_EVEN;