快速 开始：
STM32F103RET6
基础IO
#define LEDYELL_PIN GET_PIN(A, 12)
#define LEDRED_PIN GET_PIN(C, 7)
#define LEDGREE_PIN GET_PIN(C, 8)
#define LEDBLUE_PIN GET_PIN(C, 10)
#define BUZZ_PIN GET_PIN(B, 3)
#define KEY1_PIN GET_PIN(C, 13)
#define KEY2_PIN GET_PIN(C, 11)
#define KEY3_PIN GET_PIN(C, 12)
#define KEY4_PIN GET_PIN(D, 2)
PB10----------SCL
PB11-------SDA
只有2个线 地址都是0