// Function to get current state (high\low) of a digital pin on AVR
//
// Calling Sequence
//     u8AVRDigitalIns(port,pin)
//
// Parameters
//     port : port of microcontroller to be used (1 for PORTA, 2 for PORTB,...)
//     pin : pin of port (mentioned above) to be used
//   Returns->  
//     state : state of the pin (0 for low and 1 for high)
//
// Description
//     Each AVR microcontroller has pins which can be configured as digital
//     outputs. These are normally divided among some 'ports' (group of pins).
//     User has to select one of these port and which pin of that port is to 
//     be read. Function returns current state of the pin '1' (high) or '0' (low).
//          
//
// Examples
//     state = u8AVRDigitalIns(1,0)
//
// Authors
//     Siddhesh Wani
//


#include "AVRPeripheralGPIO.h"

uint8 u8AVRDigitalIns(uint8 port,uint8 pin)
{
    uint8 state = 0;
    if(port == PORT_A)
    {
	state = (uint8)(PINA & (1<<pin));
	return state;
    }
    if(port == PORT_B)
    {
	state = (uint8)(PINB & (1<<pin));
	return state;
    }
    if(port == PORT_C)
    {
	state = (uint8)(PINC & (1<<pin));
	return state;    
    }
    if(port == PORT_D)
    {
	state = (uint8)(PIND & (1<<pin));
	return state;
    }

//return state;
}