Stlink-v2-1 burning to cmsis-dap

STLink-V2-1 adopt STLinkReflash.exe Upgrade to JinkOB STM32 After firmware , Use STM32 ST-LINK Utility It is impossible to burn again （ Probably JlinkOB Write protected ）. First use STLinkReflash.exe Return to STLink-V2-1 The firmware , Reuse STM32 ST-LINK Utility burn ：
F103-DAP-SWO-CDC-STLINK_V21.hex

1. It can be debugged normally

PA9 The traffic lights connected above flash alternately .

2. Analog out serial port , The serial port transceiver function is also normal .