MFC opens the serial port, and the stm32 microcontroller stops running

nuk

MFC opens the serial port, and the stm32 microcontroller stops running [Copy link]

I wrote a program that sends data to the serial port after pressing a stm32 button, and uses MFC to read the serial port data; but when MFC opens the serial port connected to the microcontroller, the microcontroller stops running (the indicator light is on during normal operation, but it goes out when the serial port is opened, and it will recover after turning off the mfc). Is there any expert who can point out the reason or possible error direction? Thank you very much

jeansonm

There is no interrupt function defined. Is there any data sent when MFC is turned on?

nuk

jeansonm posted on 2017-12-12 17:28 There is no interrupt function defined. Is there data sent when MFC is turned on?

The microcontroller has an interrupt function, but it is just an add function. In order to facilitate debugging

En-jong

Unplug it and try again. I've encountered this before.

nuk

There are two possible reasons: 1. Handshake protocol; 2. USB serial port power supply. I am trying it. Thanks for your answers.