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56 lines
1.8 KiB
56 lines
1.8 KiB
#ifndef BSP_I2C_H
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#define BSP_I2C_H
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#include "bsp_config.h"
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#ifdef USE_I2C
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#include "main.h"
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#include <stdint.h>
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#include <stdio.h>
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//IO方向设置
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// 请根据实际引脚修改 PIN_NUMBER
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#define SDA_PIN_NUM 5
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// 计算掩码和偏移
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#define SDA_MODER_MASK (~(0x03U << (SDA_PIN_NUM * 2)))
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#define SDA_MODER_INPUT_VAL (0x00U << (SDA_PIN_NUM * 2))
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#define SDA_MODER_OUTPUT_VAL (0x01U << (SDA_PIN_NUM * 2))
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// 配置为输入 (MODER = 00)
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#define SDA_IN() do { \
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GPIOB->MODER &= SDA_MODER_MASK; \
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GPIOB->MODER |= SDA_MODER_INPUT_VAL; \
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} while(0)
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// 配置为输出 (MODER = 01) - I2C 通常需要开漏，还需要配置 OTYPER
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#define SDA_OUT() do { \
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GPIOB->MODER &= SDA_MODER_MASK; \
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GPIOB->MODER |= SDA_MODER_OUTPUT_VAL; \
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GPIOB->OTYPER |= (1U << SDA_PIN_NUM); /* 设置为开漏 Output Open Drain */ \
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} while(0)
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//IO操作
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#define IIC_SCL(sta) HAL_GPIO_WritePin(SCL_GPIO_Port, SCL_Pin, sta) //SCL
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#define IIC_SDA(sta) HAL_GPIO_WritePin(SDA_GPIO_Port, SDA_Pin, sta) //SDA
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#define READ_SDA HAL_GPIO_ReadPin(SDA_GPIO_Port, SDA_Pin) //输入SDA
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#define PCF8591 0x90
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extern uint8_t D[4];
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//IIC所有操作函数
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void IIC_Init(void); //初始化IIC的IO口
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void IIC_Start(void); //发送IIC开始信号
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void IIC_Stop(void); //发送IIC停止信号
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void IIC_Send_Byte(uint8_t txd); //IIC发送一个字节
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uint8_t IIC_Read_Byte(unsigned char ack);//IIC读取一个字节
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uint8_t IIC_Wait_Ack(void); //IIC等待ACK信号
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void IIC_Ack(void); //IIC发送ACK信号
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void IIC_NAck(void); //IIC不发送ACK信号
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void IIC_Write_One_Byte(uint8_t daddr,uint8_t addr,uint8_t data);
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uint8_t IIC_Read_One_Byte(uint8_t daddr,uint8_t addr);
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void IIC_TEST(void);
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#endif
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#endif /* end of include guard: BSP_I2C_H */
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