QN8027 IIC 模拟接口C语言

IIC
C语言实现
参考原子哥iic代码

时序图

#include "iic.h"

void IIC_Init(void)
{					      
	USER_GPIO->DATA_OUT |= (0x03);
}
void IIC_Start(void)
{
	GPIOWritePin(IIC_SDA,GPIO_SET);
	GPIOWritePin(IIC_SCL,GPIO_SET);
	delay_us(4);
	GPIOWritePin(IIC_SDA,GPIO_RESET);
	delay_us(4);
	GPIOWritePin(IIC_SCL,GPIO_RESET);
}	  
void IIC_Stop(void)
{	
	GPIOWritePin(IIC_SCL,GPIO_RESET);
	GPIOWritePin(IIC_SDA,GPIO_RESET);
	delay_us(6);
	GPIOWritePin(IIC_SCL,GPIO_SET);
	delay_us(3);
	GPIOWritePin(IIC_SDA,GPIO_SET);
	delay_us(3);
}
void IIC_Ack(void)
{
	uint16_t ucErrTime=0;
		delay_us(3);	   
	GPIOWritePin(IIC_SCL,GPIO_SET);
	delay_us(6);	 
	while(1)
	{
		ucErrTime++;
		if(ucErrTime>300)
		{
			//IIC_Stop();
			break;
		}
	}
	GPIOWritePin(IIC_SCL,GPIO_RESET);
	delay_us(15);
	return ;  
} 
	     
	  
void IIC_Send_Byte(uint8_t txd)
{                        
    uint8_t t;    	    
	GPIOWritePin(IIC_SCL,GPIO_RESET);
    for(t=0;t<8;t++)
    {              
			GPIOWritePin(IIC_SDA,(txd&0x80)>>7);
      		txd<<=1; 	  
			delay_us(5);
			GPIOWritePin(IIC_SCL,GPIO_SET);
			delay_us(5);			
			GPIOWritePin(IIC_SCL,GPIO_RESET);
			//opt_delay(12);
			GPIOWritePin(IIC_SDA,GPIO_RESET);
			delay_us(5);
    }	 
} 	    
void IICWrite(int reg, int data)
{
	IIC_Start();
	IIC_Send_Byte(0x58);
	IIC_Ack();
	IIC_Send_Byte(reg);
	IIC_Ack();
	IIC_Send_Byte(data);
	IIC_Ack();
	IIC_Stop();
}
uint8_t IICRead(int reg )
{
	int data=0;
	IIC_Start();
	IIC_Send_Byte(0x58);
	IIC_Ack();
	IIC_Send_Byte(reg);
	IIC_Ack();
	delay_us(5);
	IIC_Start();
	IIC_Send_Byte(0x59);
	IIC_Ack();
	Data = IIC_Read_Byte();
	IIC_Ack();
		IIC_Stop();
	return Data;
}
uint8_t IIC_Read_Byte()
{
	unsigned char i,receive=0;
	READ_SDA;
    for(i=0;i<8;i++ )
	{
        GPIOWritePin(IIC_SCL,GPIO_RESET);
        delay_us(5);
		GPIOWritePin(IIC_SCL,GPIO_SET);
        receive<<=1;
    if(READ_SDA)receive++;   
		delay_us(5); 
  }
        IIC_Ack(); 
    return receive;
}

#ifndef __IIC_H
#define __IIC_H
#include "main.h"


#define IIC_SCL    0
#define IIC_SDA    1 
#define READ_SDA   GPIOReadPin(1)


void IIC_Init(void);                //³õʼ»¯IICµÄIO¿Ú				 
void IIC_Start(void);				//·¢ËÍIIC¿ªÊ¼ÐźÅ
void IIC_Stop(void);	  			//·¢ËÍIICÍ£Ö¹ÐźÅ
void IIC_Send_Byte(uint8_t txd);			//IIC·¢ËÍÒ»¸ö×Ö½Ú
void IIC_Ack(void);					//IIC·¢ËÍACKÐźÅ
void IICWrite(int reg, int data);
uint8_t IICRead(int reg );
uint8_t IIC_Read_Byte();
#endif