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// Function to change state (high\low) of a digital output pin on AVR
//
// Calling Sequence
// u8AVRDigitalOuts(port,pin,state)
//
// Parameters
// port : port of microcontroller to be used (1 for PORTA, 2 for PORTB,...)
// pin : pin of port (mentioned above) to be used
// state : state to be outputed on 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 as
// digital output. Also, desired output state must be specified as
// '1' (high) or '0' (low).
//
// Examples
// u8AVRDigitalOuts(1,0,1)
//
// Authors
// Siddhesh Wani
//
#include "AVRPeripheralGPIO.h"
void u8AVRDigitalOuts(uint8 port,uint8 pin,uint8 state)
{
if(state == LOW)
{/*Make output pin high*/
if(port == PORT_A)
{
PORTA = PORTA & ~(1<<pin);
}
if(port == PORT_B)
{
PORTB = PORTB & ~(1<<pin);
}
if(port == PORT_C)
{
PORTC = PORTC & ~(1<<pin);
}
if(port == PORT_D)
{
PORTD = PORTD & ~(1<<pin);
}
}
else
{/*Make output pin high*/
if(port == PORT_A)
{
PORTA = PORTA | (1<<pin);
}
if(port == PORT_B)
{
PORTB = PORTB | (1<<pin);
}
if(port == PORT_C)
{
PORTC = PORTC | (1<<pin);
}
if(port == PORT_D)
{
PORTD = PORTD | (1<<pin);
}
}
}
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