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126 lines
3.8 KiB
126 lines
3.8 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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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 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; //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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uint8_t addr; //器件地址
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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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}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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void IIC_Send_Byte(const IIC_SOFT_TypeDef *pSoftIIC,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_Read_Byte( const IIC_SOFT_TypeDef *pSoftIIC);//IIC读取一个字节
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uint8_t 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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uint8_t IIC_Read_Test(const IIC_SOFT_TypeDef *pSoftIIC, uint8_t reg_addr, uint8_t *buf, uint8_t len);
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uint8_t IIC_Write_Test(const IIC_SOFT_TypeDef *pSoftIIC , uint8_t reg_addr, uint8_t *buf, uint8_t len);
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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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HAL_I2C_MspDeInit( &hi2c1 );
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uint8_t readout[256] = {0};
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uint8_t writein[1] = {0xFB};
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// IIC_Init( );
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// IIC_Write_Test( 0xA0, 0, writein, 1 );
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// HAL_Delay( 200 );
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// IIC_Read_Test( 0xA0, 0, readout, 1 );
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// log_i("iic test %02X .... ", *readout);
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IIC_SOFT_TypeDef sIIC = {
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GPIOB, GPIO_PIN_6, GPIOB, GPIO_PIN_7,
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7,0xA0,1,
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};
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IIC_Init( &sIIC );
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IIC_Write_Test( &sIIC,0xA0, 0, writein, 1 );
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HAL_Delay( 200 );
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IIC_Read_Test(&sIIC, 0xA0, 0, readout, 1 );
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log_i("iic test %02X .... ", *readout);
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*/ |