ʾʹõԴ
I2C_SCL     ------ PB3
I2C_SDA     ------ PB4

ʾḶ́
1ϵϵͳʱӣRCHΪʱԴΪ48M
2ʼGPIOģI2C SCLSDA
3̣Ѱַд󣬷8ֽݣ
4̣ѰַͶ󣬽8ֽݣ

رע⣺
1MDKŻȼΪdefaultѡOptimize for Time
2IARŻȼΪMedium
