V23

EXAMPLES/Shell/GPIOTEST/README

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+This bash script tests the user gpios.
+
+Everything should be disconnected from the gpios.
+
+The pigpio daemon must be running (sudo pigpiod).
+
+Video at http://youtu.be/sCJFLKWaxHo

EXAMPLES/Shell/GPIOTEST/gpiotest

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+#!/bin/bash
+
+skipped=""
+tested=""
+failed=""
+
+usage()
+{
+   cat <<EOF
+This program checks the Pi's (user) gpios.
+
+The program reads and writes all the gpios.  Make sure NOTHING
+is connected to the gpios during this test.
+
+The program uses the pigpio daemon which must be running.
+
+To start the daemon use the command sudo pigpiod.
+
+Press the ENTER key to continue or ctrl-C to abort...
+EOF
+
+   read a
+}
+
+restore_mode()
+{
+   # $1 gpio
+   # $2 mode
+
+   case "$2" in
+        0) m="r" ;;
+        1) m="w" ;;
+        2) m="5" ;;
+        3) m="4" ;;
+        4) m="0" ;;
+        5) m="1" ;;
+        6) m="2" ;;
+        7) m="3" ;;
+        *)
+           echo "invalid mode $2 for gpio $1"
+           exit 1
+   esac
+
+   $(pigs m $1 $m)
+}
+
+check_gpio()
+{
+   # $1 gpio
+   # $2 i2c
+
+   m=$(pigs mg $1) # save mode
+   L=$(pigs r $1)  # save level
+
+   s=$(pigs m $1 w)
+
+   if [[ $s  = "" ]]
+   then
+      f=0
+      tested+="$1 "
+
+      # write mode tests
+      $(pigs w $1 0)
+      r=$(pigs r $1)
+      if [[ $r -ne 0 ]]; then f=1; echo "Write 0 to gpio $1 failed."; fi
+
+      $(pigs w $1 1)
+      r=$(pigs r $1)
+      if [[ $r -ne 1 ]]; then f=1; echo "Write 1 to gpio $1 failed."; fi
+
+      # read mode tests using pull-ups and pull-downs
+      $(pigs m $1 r)
+
+      if [[ $2 -eq 0 ]]
+      then
+         $(pigs pud $1 d)
+         r=$(pigs r $1)
+         if [[ $r -ne 0 ]]; then f=1; echo "Pull down on gpio $1 failed."; fi
+      fi
+
+      $(pigs pud $1 u)
+      r=$(pigs r $1)
+      if [[ $r -ne 1 ]]; then f=1; echo "Pull up on gpio $1 failed."; fi
+
+      $(pigs pud $1 o)   # switch pull-ups/downs off
+      $(pigs w $1 $L)    # restore original level
+      restore_mode $1 $m # restore original mode
+
+      if [[ $f -ne 0 ]]; then failed+="$1 "; fi
+   else
+      skipped+="$1 "
+   fi
+}  2>/dev/null
+
+usage
+
+v=$(pigs hwver)
+
+if [[ $v < 0 ]]
+then
+   echo "The pigpio daemon wasn't found.  Did you sudo pigpiod?"
+   exit
+fi
+
+echo "Testing..."
+
+for ((i=0;  i<4;  i++)) do check_gpio $i 1; done
+for ((i=4;  i<16; i++)) do check_gpio $i 0; done
+
+if [[ $v -ge 16 ]];
+then
+   check_gpio 16 0
+else
+   skipped+="16 "
+fi
+
+for ((i=17;  i<28; i++)) do check_gpio $i 0; done
+for ((i=28; i<30; i++)) do check_gpio $i 1; done
+for ((i=30; i<32; i++)) do check_gpio $i 0; done
+
+if [[ $failed = "" ]]; then failed="None"; fi
+
+echo "Skipped non-user gpios: $skipped"
+echo "Tested user gpios: $tested"
+echo "Failed user gpios: $failed"
+