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// Function to decide direction of a digital pin on AVR
//
// Calling Sequence
// AVRDigitalSetup(port,pin,direction)
//
// Parameters
// port : port of microcontroller to be used (1 for PORTA, 2 for PORTB,...)
// pin : pin of port (mentioned above) to be used
// direction : direction to be set for pin (0 for input, 1 for output)
//
// Description
// Each AVR microcontroller has pins which can be configured as digital
// outputs/inputs. These are normally divided among some 'ports' (group of pins).
// User has to select one of these port and which pin of that port to be
// used as digital output/input. Also, desired direction must be specified as
// 'INPUT' or 'OUTPUT'.
//
// Examples
// AVRDigitalSetup(1,0,1)
//
// Authors
// Siddhesh Wani
//
#include "AVRPeripheralGPIO.h"
void u8AVRDigitalSetups(uint8 port,uint8 pin,uint8 direction)
{
if (direction == INPUT)
{/*Set pin as input*/
if(port == PORT_A)
{
DDRA = DDRA & ~(1<<pin);
}
if(port == PORT_B)
{
DDRB = DDRB & ~(1<<pin);
}
if(port == PORT_C)
{
DDRC = DDRC & ~(1<<pin);
}
if(port == PORT_D)
{
DDRD = DDRD & ~(1<<pin);
}
}
else
{/*Set pin as output*/
if(port == PORT_A)
{
DDRA = DDRA | (1<<pin);
}
if(port == PORT_B)
{
DDRB = DDRB | (1<<pin);
}
if(port == PORT_C)
{
DDRC = DDRC | (1<<pin);
}
if(port == PORT_D)
{
DDRD = DDRD | (1<<pin);
}
}
}
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