Garbled Characters Issue in Serial Port 1 with STM32CubeMX 6.13.0 and STM32Cube_FW_H7_V1.12.0

[zhengjianxing]

The serial port 1 code generated by the latest STM32CubeMX 6.13.0 will print garbled characters, and using the serial port routine UART_Printf in STM32Cube_FW_H7_V1.12.0 will also print garbled characters.

It doesn't work when using the serial port routine UART_Printf in STM32Cube_FW_H7_V1.11.2. After comparison, there is a difference here. I can’t understand the function here. I will be careful whether changing it will affect other functions.

*This post has been translated from Chinese to comply with the ST Community guidelines.

[KDJEM.1]

Hello @zhengjianxing,

Thank you for bringing this issue to our attention.

const uint8_t D1CorePrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; 

should be 

const uint8_t D1CorePrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9}

I reported this issue internally.

Thank you for your contribution to the community.

Internal ticket number: 197431 (This is an internal tracking number and is not accessible or usable by customers).

Thank you.

Kaouthar

[Andrew Neil]

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@zhengjianxing wrote:

The serial port 1 code generated by the latest STM32CubeMX 6.13.0 will print garbled characters, and using the serial port routine UART_Printf in STM32Cube_FW_H7_V1.12.0 will also print garbled characters.

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Which suggests that the baud rate is wrong:

https://learn.sparkfun.com/tutorials/serial-communication/all#:~:text=If%20all%20the%20receiving%20device%20sees%20on%20its%20receive%20line%20is%20garbage%2C%20check%20to%20make%20sure%20the%20baud%20rates%20match%20up