initial cleanup and mapping

gpio/pintest

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+#!/bin/bash
+#
+# pintest
+#	Test the Pi's GPIO port
+# Copyright (c) 2013 Gordon Henderson
+#################################################################################
+# This file is part of wiringPi:
+#	Wiring Compatable library for the Raspberry Pi
+#
+#    wiringPi is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Lesser General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    wiringPi is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Lesser General Public License for more details.
+#
+#    You should have received a copy of the GNU Lesser General Public License
+#    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
+#################################################################################
+
+
+# logErr pin, expected got
+################################################################################
+
+logErr ()
+{
+  if [ $errs = 0 ]; then
+    echo ""
+  fi
+  echo " --> Pin $1 failure. Expected $2, got $3"
+  let errs+=1
+}
+
+
+# printErrorCount
+################################################################################
+
+printErrCount()
+{
+  if [ $errs = 0 ]; then
+    echo "No faults detected."
+  elif [ $errs = 1 ]; then
+    echo "One fault detected."
+  else
+    echo "$errs faults detected"
+  fi
+}
+
+
+# testPins start end
+################################################################################
+
+testPins()
+{
+  start=$1
+    end=$2
+   errs=0
+
+  printf "%30s %2d:%2d: "  "$3" $1 $2
+
+# Set range to inputs
+
+  for i in `seq $start $end`; do
+    gpio mode $i in
+  done
+
+# Enable internal pull-ups and expect to read high
+
+  for i in `seq $start $end`; do
+    gpio mode $i up
+    if [ `gpio read $i` = 0 ]; then
+      logErr $i 1 0
+    fi
+  done
+
+# Enable internal pull-downs and expect to read low
+
+  for i in `seq $start $end`; do
+    gpio mode $i down
+    if [ `gpio read $i` = 1 ]; then
+      echo "Pin $i failure - expected 0, got 1"
+      let errs+=1
+    fi
+  done
+
+# Remove the internal pull up/downs
+
+  for i in `seq $start $end`; do
+    gpio mode $i tri
+  done
+
+  if [ $errs = 0 ]; then
+    echo " OK"
+  else
+    printErrCount
+  fi
+
+  let totErrs+=errs
+}
+
+
+intro()
+{
+  revision=`gpio -V`
+  cat <<EOF
+PinTest
+=======
+
+This is a simple utility to test the GPIO pins on your revision $revision
+Raspberry Pi.
+
+NOTE: All GPIO peripherals must be removed to perform this test. This
+  includes serial, I2C and SPI connections. You may get incorrect results
+  if something is connected and it interferes with the test.
+
+This test can only test the input side of things. It uses the internal
+pull-up and pull-down resistors to simulate inputs. It does not test
+the output drivers.
+
+You will need to reboot your Pi after this test if you wish to use the 
+serial port as it will be left in GPIO mode rather than serial mode.
+
+Please make sure everything is removed and press the ENTER key to continue,
+EOF
+
+  echo -n "or Control-C to abort... "
+  read a
+}
+
+
+# Start here
+################################################################################
+
+intro
+gpio unexportall
+gpio reset
+
+   errs=0
+totErrs=0
+
+echo ""
+
+# Main pins
+
+testPins 0 7 "The main 8 GPIO pins"
+
+# P5 pins, if a rev 2:
+
+if [ $revision = 2 ]; then
+  testPins 17 20 "The 4 pins on the P5 connector"
+fi
+
+# SPI
+
+testPins 10 14 "The 5 SPI pins"
+
+# Serial
+
+testPins 15 16 "The serial pins"
+
+# I2C - Needs somewhat different testing
+#	due to the on-board pull-up's
+
+echo -n "                  The I2C pins  8: 9: "
+errs=0
+gpio mode 8 in
+gpio mode 9 in
+
+if [ `gpio read 8` = 0 ]; then
+  echo "Pin 8 failure - expected 1, got 0"
+  let errs+=1
+fi
+
+if [ `gpio read 9` = 0 ]; then
+  echo "Pin 9 failure - expected 1, got 0"
+  let errs+=1
+fi
+
+if [ $errs = 0 ]; then
+  echo " OK"
+else
+  printErrCount
+fi
+
+echo ""
+if [ $totErrs != 0 ]; then
+  echo ""
+  echo "Faults detected! Output of 'readall':"
+  gpio readall
+fi