When the serial port assistant is sending and receiving data, the baud rate is too high and it will be garbled

 In the STM32printf redirection experiment, when using printf to output information to the serial port, the output data will appear garbled or missing data, as shown in the figure:

It should output 122 bits of data. When the baud rate is 115200, the output is 2 bits and garbled.

Solution: Lower the baud rate, take 9600 as an example

As shown