I2C1-Slave  

        one board      another board
            I2C1                   I2C1
SCL:      PD5       <-->     PD5
SDA:     PD4       <-->     PD4

շ PC0 
շPC1


ע: ȸλӻٸλ

: ʹӻPC0ΪⲿĬ͵ƽİ