stm32f103rct6 serial port 485 can receive, send error

说人不说见

Please help. I am facing such a problem. The 485 communication can be received and the receiving interrupt can be entered. However, an error occurs when sending the array. The sending is not executed or the sending is incorrect. The control pin also changes state. There is also a delay after the sending function. The TX pin frequency is also set during initialization. There is no problem with the hardware design. The pin is only used in 485.

The initialization code is as follows:

Interrupt

Main function call

damiaa

Your receiving and sending do not seem to be closely related. You only allow sending after receiving a data of 0xb5.

You can focus on sending to see if there is any problem.

First turn off the receive interrupt, and then send periodically to see if it works properly.