GD32F130 will immediately enter the serial port interrupt after the serial port idle interrupt is turned on

马超飞燕

GD32F130 will immediately enter the serial port interrupt after the serial port idle interrupt is turned on [Copy link]

MCU model: GD32F130F8P6.
When debugging the serial port idle interrupt, I found that after enabling the serial port idle interrupt, the serial port will immediately enter the serial port interrupt. The serial port idle interrupt was also cleared before it was enabled. I don't know what's going on.

freebsder

I am not familiar with GD, but you can check if there are any relevant parameters to put the idle interrupt after receiving. Some MCUs can set the interrupt to occur before or after data reception, which is interesting.

宋元浩

You can look at the registers to see which flags are set when entering the interrupt