1 files changed, 71 insertions, 0 deletions
diff --git a/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalSetups.c b/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalSetups.c
new file mode 100644
index 00000000..46697f70
--- /dev/null
+++ b/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalSetups.c
@@ -0,0 +1,71 @@
+// 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"
+
+
+uint8 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);
+   	}
+    }
+return 0;
+}
+