I2C1-Slave  

        one board      another board
            I2C1                   I2C1
SCL:      PD8       <-->     PD8
SDA:     PD9       <-->     PD9

շ PC0 
շPC1


ע: ȸλӻٸλ

: ʹӻPC0ΪⲿĬ͵ƽİ