/*
 * I2C_MASTER.c
 *
 * Created: 4/2/2018 7:38:20 PM
 * Author : suwas
 */
 #define F_CPU 16000000UL						/* Define CPU clock Frequency e.g. here its 16MHz */
 #include <avr/io.h>							/* Include AVR std. library file */
 #include <util/delay.h>						/* Include inbuilt defined Delay header file */
 #include <stdio.h>							/* Include standard I/O header file */
 #include <string.h>							/* Include string header file */
 #include <avr/lcd4bits.h>				/* Include I2C header file */
 #include "I2C_Master_H_file.h"				/* Include LCD header file */
#include <avr/dht11.h>
 #define Slave_Write_Address		0x20
 #define Slave_Read_Address			0x21
 unsigned int I_RH=0,D_RH=0,I_Temp=0,D_Temp=0,CheckSum=0;

char data[5];

unsigned int count=0;
 int main()
 {
	 DDRB = 0XFF;
	 DDRD &=~(1<<PIND6); //input for sensors
	 PIND &=~(1<<PIND6);
	 lcd_init();								/* Initialize LCD */
	 I2C_Init();								/* Initialize I2C */
	 LCDWriteStringXY(0,0, "Master Device");

	 while (1)
	 {
		 I2C_Start_Wait(Slave_Write_Address);
		 _delay_ms(20);
		 Request();
		 _delay_us(40);  /* send start pulse */
		 Response();  /* receive response */
		 I_RH=Receive_data();	               /* store first eight bit in I_RH */
		 D_RH=Receive_data();	               /* store next eight bit in D_RH */
		 I_Temp=Receive_data();                 /* store next eight bit in I_Temp */
		 D_Temp=Receive_data();	               /* store next eight bit in D_Temp */
		 CheckSum=Receive_data();               /* store next eight bit in CheckSum */
  		 if ((I_RH + D_RH + I_Temp + D_Temp) != CheckSum)
  		 {
  			 lcd_gotoLineOne();
  			 dis_string("Error");
  		 }
		lcd_gotoLineOne();
		dis_string("  ROSA FARMING  ");
		lcd_gotoLineTwo();
		itoa(I_RH,data,10);
		dis_string("RH: ");
		dis_string(data);
		dis_string("%");
		itoa(I_Temp,data,10);
		dis_string("T: ");
		dis_string(data);
		dis_data(0xDF);
		dis_string("C  ");
		dis_string("         ");
		I2C_Write(I_RH);
		I2C_Write(I_Temp);
   		_delay_ms(5);
   		I2C_Repeated_Start(Slave_Read_Address);	/* Repeated Start I2C communication with SLA+R */
   		_delay_ms(5);
		 I2C_Stop();
	 }
}