Started following some tutorial on att85 usi. Downloaded example code from make avr book.

Make AVR Examples/setupProject/createPinDefines.py

@@ -0,0 +1,61 @@
+#! /usr/bin/env python
+
+## Given a list of names and pin defines, runs through a routine that
+## sets up a standard set of macros which can then be cut/paste or
+## otherwise included.
+
+import sys
+try:
+    outputFilename = sys.argv[1]
+except:
+    print
+    print 'No filename passed, saving to "pinDefinitions.h" in this directory.'
+    outputFilename = "pinDefinitions.h"
+
+print
+print
+print "First we need to define macro names and the coresponding AVR pins."
+print "None of the names are case-sensitive -- all are converted to uppercase."
+print "When you're done, hit [enter] for the macro name."
+print " "
+
+
+nicknames = []
+pinouts = []
+while(True):
+    nickname = raw_input("\nPin Macro Name: ").strip().upper()
+    if (nickname == ""):
+        break
+    nicknames.append(nickname)
+    pinout = raw_input("AVR Pinout: ").strip().upper()
+    pinouts.append(pinout)
+    
+output =  "// ---------------\n//   Pin Defines  \n// ---------------\n\n"
+for (nickname, pinout) in zip(nicknames, pinouts):
+    output += "#define %s                     %s\n" % (nickname, pinout)
+    output += "#define %s_PORT                PORT%s\n" % (nickname, pinout[1])
+    output += "#define %s_PIN                 PIN%s\n" % (nickname, pinout[1])
+    output += "#define %s_DDR                 DDR%s\n" % (nickname, pinout[1])
+    output += "#define %s_SET_OUTPUT          %s_DDR |= _BV(%s)\n" %\
+        (nickname, nickname, nickname)
+    output += "#define %s_SET_INPUT           %s_DDR &= ~_BV(%s)\n" %\
+        (nickname, nickname, nickname)
+    output += "#define %s_SET_HIGH            %s_PORT |= _BV(%s)\n" % \
+        (nickname, nickname, nickname)
+    output += "#define %s_SET_LOW             %s_PORT &= ~_BV(%s)\n" % \
+        (nickname, nickname, nickname)
+    output += "#define %s_TOGGLE              %s_PORT ^= _BV(%s)\n" % \
+        (nickname, nickname, nickname)    
+    output += "#define %s_IS_HIGH             (%s_PIN & _BV(%s))\n" % \
+        (nickname, nickname, nickname)
+    output += "#define %s_IS_LOW              !(%s_PIN & _BV(%s))\n" % \
+        (nickname, nickname, nickname)        
+    output += "\n"
+
+    
+try:
+    outfile = open(outputFilename, "w")
+    outfile.write(output)
+    outfile.close()
+except NameError:
+    print output