Hi Marius,
Thank you for your help, you provide the solution is correct, I choose the configuration of FreeMASTER to UART1 with PTB3 as RX and PTB4 as TX, then the HVP-KV46F150 control board and FreeMASTER communication, and I made the necessary changes,Because before I put the system clock frequency wrong, I chose the System Clock Frequency to 150MHz, the XTAL Frequency to 10MHz, when I were changed to 120MHz and 8MHz, the normal communication, I do not know why, I thought my HVP-KV46F150 System Clock Frequency is 150MHz, the following is a modified picture, for others reference it.
At the same time, I also realized that it is very important to read the application manual of the evaluation board, thank you once again.
Best regards,
wangxuan



