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/*
 * DHT11.h
 *
 * Created: 18-Nov-21 16:12:11
 *  Author: udani
 */ 


#ifndef DHT11_H_
#define DHT11_H_

#define DHT11_PIN 6
uint8_t c=0,I_RH,D_RH,I_Temp,D_Temp,CheckSum;

void Request()				/* Microcontroller send start pulse/request */
{
	DDRD |= (1<<DHT11_PIN);
	PORTD &= ~(1<<DHT11_PIN);	/* set to low pin */
	_delay_ms(20);			/* wait for 20ms */
	PORTD |= (1<<DHT11_PIN);	/* set to high pin */
}

void Response()				/* receive response from DHT11 */
{
	DDRD &= ~(1<<DHT11_PIN);
	while(PIND & (1<<DHT11_PIN));
	while((PIND & (1<<DHT11_PIN))==0);
	while(PIND & (1<<DHT11_PIN));
}

uint8_t Receive_data()			/* receive data */
{
	for (int q=0; q<8; q++)
	{
		while((PIND & (1<<DHT11_PIN)) == 0);  /* check received bit 0 or 1 */
		_delay_us(30);
		if(PIND & (1<<DHT11_PIN))/* if high pulse is greater than 30ms */
		c = (c<<1)|(0x01);	/* then its logic HIGH */
		else			/* otherwise its logic LOW */
		c = (c<<1);
		while(PIND & (1<<DHT11_PIN));
	}
	return c;
}



#endif /* DHT11_H_ */