Guys, let me know what the reason is.

血叶星辰

Guys, let me know what the reason is. [Copy link]

The drivers have been updated and powered on.

ddllxxrr

Use your serial port to power the chip to be burned, or click download first and then power on the development board. The principle is that firmware download will only work when powered on.

ienglgge

Make sure the com port is correctly identified by the computer. Select the correct port number. Cold start the download. Is the USB to serial port cable good? Check the hardware connection carefully. Including the pins of the microcontroller.

qwqwqw2088

If it is the first time, check the download line, serial communication settings, etc. in this way. It is also the reason for the cold start. Click to download first, power off and then power on. STC is like this