Introduction - If you have any usage issues, please Google them yourself
The experiment will achieve the following functions: This experiment will use disruptive manner, to achieve experiment two functions implemented. Note: 1, the code can only JTAG (SWD) download, but does not support the simulation (simulation error). 2, the download process, you must unplug JLINK to get the correct results, and that this program only the first time be able to with JTAG download, then unless you set the ISP mode, otherwise you have to use the serial port to download the program. Of course, this code can not be JTAG/SWD simulation! 3, 1820, and do not put the jumper cap PA0 jump, it may cause the button " not working."