#ifndef BSP_I2C_H

#define BSP_I2C_H

#include "bsp_config.h"
#ifdef USE_I2C
#include "main.h"
#include <stdint.h>
#include <stdio.h>

//IO方向设置
// 请根据实际引脚修改 PIN_NUMBER
#define SDA_PIN_NUM 5 

// 计算掩码和偏移
#define SDA_MODER_MASK (~(0x03U << (SDA_PIN_NUM * 2)))
#define SDA_MODER_INPUT_VAL (0x00U << (SDA_PIN_NUM * 2))
#define SDA_MODER_OUTPUT_VAL (0x01U << (SDA_PIN_NUM * 2))

// 配置为输入 (MODER = 00)
#define SDA_IN()  do { \
    GPIOB->MODER &= SDA_MODER_MASK; \
    GPIOB->MODER |= SDA_MODER_INPUT_VAL; \
} while(0)

// 配置为输出 (MODER = 01) - I2C 通常需要开漏，还需要配置 OTYPER
#define SDA_OUT() do { \
    GPIOB->MODER &= SDA_MODER_MASK; \
    GPIOB->MODER |= SDA_MODER_OUTPUT_VAL; \
    GPIOB->OTYPER |= (1U << SDA_PIN_NUM); /* 设置为开漏 Output Open Drain */ \
} while(0)

//IO操作
#define IIC_SCL(sta)    HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, sta) //SCL
#define IIC_SDA(sta)    HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, sta) //SDA	 
#define READ_SDA   HAL_GPIO_ReadPin(SDA_GPIO_Port, SDA_Pin)  //输入SDA 

#define PCF8591    0x90

extern uint8_t D[4];
//IIC所有操作函数
void IIC_Init(void);                //初始化IIC的IO口				 
void IIC_Start(void);				//发送IIC开始信号
void IIC_Stop(void);	  			//发送IIC停止信号
void IIC_Send_Byte(uint8_t txd);			//IIC发送一个字节
uint8_t IIC_Read_Byte(unsigned char ack);//IIC读取一个字节
uint8_t IIC_Wait_Ack(void); 				//IIC等待ACK信号
void IIC_Ack(void);					//IIC发送ACK信号
void IIC_NAck(void);				//IIC不发送ACK信号

void IIC_Write_One_Byte(uint8_t daddr,uint8_t addr,uint8_t data);
uint8_t IIC_Read_One_Byte(uint8_t daddr,uint8_t addr);	 
void IIC_TEST(void);
#endif

#endif /* end of include guard: BSP_I2C_H */