#ifndef __I2C_USER_H
#define __I2C_USER_H

#include "main.h"

#define SDA_IN()  				{GPIOB->MODER&=~(3<<(7*2));GPIOB->MODER|=0<<7*2;}    
#define SDA_OUT() 				{GPIOB->MODER&=~(3<<(7*2));GPIOB->MODER|=1<<7*2;}

#define Read_I2C_SDA() 		((GPIOB->IDR&I2C_SDA_Pin)!=0)?1:0

#define I2C_SDA_HIGH()		LL_GPIO_SetOutputPin(I2C_SDA_GPIO_Port,I2C_SDA_Pin)
#define I2C_SDA_LOW()			LL_GPIO_ResetOutputPin(I2C_SDA_GPIO_Port,I2C_SDA_Pin)

#define I2C_SCL_HIGH()		LL_GPIO_SetOutputPin(I2C_SCL_GPIO_Port,I2C_SCL_Pin)
#define I2C_SCL_LOW()			LL_GPIO_ResetOutputPin(I2C_SCL_GPIO_Port,I2C_SCL_Pin)

#define I2C_ACK           0         //应答
#define I2C_NOACK         1         //非应答


void uDelay(uint32_t cnt);
void I2C_Start(void);
void I2C_Stop(void);
void I2C_PutAck(uint8_t Ack);
uint8_t I2C_GetAck(void);
void I2C_WriteByte(uint8_t Data);
void I2C_WriteByte7(uint8_t Data);
uint8_t I2C_ReadByte(uint8_t ack);



#endif /* __I2C_USER_H */