Had used the st-link bootloader from this: https://github.com/Krakenw/Stlink-Bootloaders
stm32f103c8t6-jlink
C8T6核心板JLINK固件
the bibi.bin is FW:J-Link STLink V2 compiled Jun 26 2017 10:34:41, this version can be reflashed to stlink or update the j-link fw.
the bibi21.bin is FW:J-Link STLink V21 compiled Jun 26 2017 10:35:16，while this one cannot!
Target interface speed: 4000 kHz (Fixed)
追求完美就加三个电阻，实际上CLK时钟直接接PB13,DIO数据直接接PB14也一点问题都没有。不过可能不太稳定。
带c的去除了坑爹的许可证条款。
（Files named including 'c' had been remove the daddy-fucking permission terms）