1 files changed, 54 insertions, 0 deletions
diff --git a/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalIns.c b/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalIns.c
new file mode 100644
index 00000000..6b61a56b
--- /dev/null
+++ b/2.3-1/src/c/hardware/avr/gpio/u8AVRDigitalIns.c
@@ -0,0 +1,54 @@
+// 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;
+}