/*
 * iic.c
 *
 *  Created on: Oct 24, 2021
 *      Author: wuwenfeng
 */

#include "iic.h"
#include "gpio.h"
#define iic_sda(x)	HAL_GPIO_WritePin(iic_sda_GPIO_Port, iic_sda_Pin, x)
#define iic_scl(x)	HAL_GPIO_WritePin(iic_scl_GPIO_Port, iic_scl_Pin, x)
#define read_iic_sda  HAL_GPIO_ReadPin(iic_sda_GPIO_Port, iic_sda_Pin)


void iic_start()
{
	iic_sda(1);
	iic_scl(1);
	iic_sda(0);
	iic_scl(0);
}

void iic_stop()
{
	iic_sda(0);
	iic_scl(1);
	iic_sda(1);
}

void iic_ack()
{
	iic_scl(1);
	iic_scl(0);
}

void IIC_Write_Byte(unsigned char IIC_Byte){
	iic_scl(0);
	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0);
	for(unsigned char i=0;i<8;i++)
	{
		if(IIC_Byte & 0x80)
		{
			iic_sda(1);
		}else{
			iic_sda(0);
		}
		IIC_Byte<<=1;
		iic_scl(1);
		iic_scl(0);
	}
}

unsigned char IIC_Read_Byte()
{
	unsigned char k=0;
	iic_scl(0);
	change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1);
	for(unsigned char i=0; i<8; i++)
	{
		iic_scl(1);
		if(read_iic_sda==1)
		{
			k|=0x01;
		}
		k<<=1;
		iic_scl(0);
	}
	return(k);
}


void IIC_SAND_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
{
	iic_start();
	IIC_Write_Byte(DEVICE_ADD);
	iic_ack();
	IIC_Write_Byte(IN_DEVICE_ADD);
	iic_ack();
	for(int a=0;a<LONG;a++)
	{
		IIC_Write_Byte(*DATAS);
		DATAS++;
	}
	iic_ack();
	iic_stop();
}

void IIC_READ_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
{
	iic_start();
	IIC_Write_Byte(DEVICE_ADD);
	iic_ack();
	IIC_Write_Byte(IN_DEVICE_ADD);
	iic_ack();
	iic_start();
	IIC_Write_Byte(IN_DEVICE_ADD+1);
	iic_ack();
	for(int a=0;a<LONG;a++)
	{
		*DATAS=IIC_Read_Byte();
		DATAS++;
	}
	iic_ack();
	iic_stop();
}