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156 lines
4.6 KiB
156 lines
4.6 KiB
#ifndef __BSP_I2C_SOFT_H
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#define __BSP_I2C_SOFT_H
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#include "stm32f4xx_hal.h"
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#include "main.h"
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// #include "sys.h"
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// #define SCL_GPIO_PORT GPIOB
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// #define SCL_PIN GPIO_PIN_6
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// #define SDA_GPIO_PORT GPIOB
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// #define SDA_PIN GPIO_PIN_7
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#define I2C_WRITE (0x00)
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#define I2C_READ (0x01)
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typedef enum {
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IIC_OK = 0x00, //IIC工作正常
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IIC_WAIT_ACK_ERR = 0x01, //slave设备返回ACK错误
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IIC_WRITE_ERR = 0x02, //向slave设备写入错误
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IIC_READ_ERR = 0x04 //从slave设备读取错误
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} IIC_STATUS;
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typedef enum
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{
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I2C_SW_Standard_Mode = 100 * 1000,
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I2C_SW_Fast_Mode = 400 * 1000,
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I2C_SW_Fast_Mode_Plus = 1000 * 1000,
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} I2C_SW_Speed_Mode_TypeDef; //i2c速率 unit Hz
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typedef enum
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{
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I2C_SW_One_Byte = 1,
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I2C_SW_Two_Byte = 2,
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I2C_SW_Four_Byte = 4
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} I2C_SW_Data_Width_TypeDef;//数据长度（寄存器地址或者值的数据长度）
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typedef enum
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{
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I2C_SW_Slave_Address_7Bit,
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I2C_SW_Slave_Address_10Bit,
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} I2C_SW_Slave_Address_Width_TypeDef;//i2c slave address的位宽
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typedef struct
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{
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GPIO_TypeDef *scl_port; //定义IIC时钟使用的端口
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uint16_t scl_pin; //定义IIC时钟使用的PIN脚
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GPIO_TypeDef *sda_port; //定义IIC数据使用的端口
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uint16_t sda_pin; //定义IIC数据使用的PIN脚
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uint8_t sda_pin_num; //SDA Pin ，操作IO Mode
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uint16_t addr; //器件地址， 兼容16bit
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uint32_t delaytick; //定义延时，以适应不同器件对速率的不同要求,具体值要在调试中确定
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I2C_SW_Slave_Address_Width_TypeDef slave_address_width;
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I2C_SW_Data_Width_TypeDef slave_reg_addr_width;
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I2C_SW_Data_Width_TypeDef slave_reg_value_width;
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}IIC_SOFT_TypeDef;
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//IO方向设置
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#define SDA_IN() {SDA_GPIO_PORT->MODER&=~(3<<(7*2));SDA_GPIO_PORT->MODER|=0<<7*2;} //PB7输入模式
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#define SDA_OUT() {SDA_GPIO_PORT->MODER&=~(3<<(7*2));SDA_GPIO_PORT->MODER|=1<<7*2;} //PB7输出模式
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#define GPIO_WRITE_PIN(PORT,PIN,VALUE) HAL_GPIO_WritePin(PORT,PIN,(VALUE)?GPIO_PIN_SET:GPIO_PIN_RESET)
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#define GPIO_READ_PIN(PORT,PIN) HAL_GPIO_ReadPin(PORT,PIN)
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//IIC所有操作函数
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// void IIC_Init( ); //初始化IIC的IO口
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void IIC_Init(const IIC_SOFT_TypeDef *pSoftIIC); //初始化IIC的IO口
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int IIC_READ_SDA_Pin(const IIC_SOFT_TypeDef *pSoftIIC);
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int IIC_SDA_Mode_In(const IIC_SOFT_TypeDef *pSoftIIC);
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int IIC_SDA_Mode_Out(const IIC_SOFT_TypeDef *pSoftIIC);
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void IIC_Start(const IIC_SOFT_TypeDef *pSoftIIC); //发送IIC开始信号
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void IIC_Stop(const IIC_SOFT_TypeDef *pSoftIIC); //发送IIC停止信号
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int IIC_Send_Byte(const IIC_SOFT_TypeDef *pSoftIIC,uint8_t txd); //IIC发送一个字节
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int IIC_Read_Byte( const IIC_SOFT_TypeDef *pSoftIIC);//IIC读取一个字节
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int IIC_Send_Slave_Addr(const IIC_SOFT_TypeDef *pSoftIIC,uint8_t r_w);
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int IIC_Send_Reg_Addr(const IIC_SOFT_TypeDef *pSoftIIC,uint32_t reg_addr );
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int IIC_Wait_Ack(const IIC_SOFT_TypeDef *pSoftIIC); //IIC等待ACK信号
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void IIC_Ack(const IIC_SOFT_TypeDef *pSoftIIC); //IIC发送ACK信号
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void IIC_NAck(const IIC_SOFT_TypeDef *pSoftIIC); //IIC不发送ACK信号
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int IIC_Read_Buf(const IIC_SOFT_TypeDef *pSoftIIC, uint32_t reg_addr , uint8_t *buf, uint8_t len);
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int IIC_Write_Buf(const IIC_SOFT_TypeDef *pSoftIIC , uint32_t reg_addr, uint8_t *buf, uint8_t len);
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int IIC_Device_Check(const IIC_SOFT_TypeDef *pSoftIIC);
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#endif
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/*
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时序
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// * @brief: I2C 开始,SCL为高电平的时候SDA产生一个下降沿信号
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// _____
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// *SDA \_____________
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// * __________
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// *SCL \________
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//
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// * @brief: I2C 停止,SCL为高电平的时候SDA产生一个上升沿信号
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// _______
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// *SDA __________/
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// * ____________
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// *SCL _____/
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// * @brief: I2C 响应
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// ____
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// *SCL ______/ \______
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// * ____ _____
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// *SDA \_______/
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//
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// * @brief: I2C 不响应
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// ____
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// *SCL ______/ \______
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// * __________________
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// *SDA
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//
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十位slave 先发 高位
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0xF00 | ((slave_addr>> 8 & 0x03)<<2) | r_w
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16bit 寄存器 addr ,先发 (addr>>8)&0xFF ,后发 addr&0xFF
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IIC_SOFT_TypeDef sIIC = {
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GPIOB, GPIO_PIN_6, GPIOB, GPIO_PIN_7,
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7,0x50,1,
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I2C_SW_Slave_Address_7Bit,
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I2C_SW_One_Byte,
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I2C_SW_One_Byte,
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};
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IIC_Init( &sIIC );
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if (!IIC_Device_Check(&sIIC))
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log_i( "hello i2c_address= 0x%02X (7bit) is exist\r\n", sIIC.addr);
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IIC_Write_Buf( &sIIC, 0, writein, 1 );
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HAL_Delay( 200 );
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IIC_Read_Buf(&sIIC, 0, readout, 1 );
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log_i("iic test %02X .... \r\n ", *readout);
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*/ |