moved isolation switch control into pi_program.sh

This makes it easier to use pi_program.sh from the command line (if you'd like to make this call without relying on test.py and the capsense)

Author: Pete Lewis

disable_switch.py

@@ -0,0 +1,16 @@
+# Raspberry Pi stand alone AVR programmer
+# DISable Isolation switch for programming via command line
+# SparkFun Electronics
+# Pete Lewis 7/13/2018
+
+import RPi.GPIO as GPIO
+
+GPIO.setwarnings(False)
+
+GPIO.setmode(GPIO.BOARD)
+
+PGM_SWITCH = 36
+
+GPIO.setup(PGM_SWITCH, GPIO.OUT)
+
+GPIO.output(PGM_SWITCH, GPIO.LOW)

enable_switch.py

@@ -0,0 +1,16 @@
+# Raspberry Pi stand alone AVR programmer
+# Enable Isolation switch for programming via command line
+# SparkFun Electronics
+# Pete Lewis 7/13/2018
+
+import RPi.GPIO as GPIO
+
+GPIO.setwarnings(False)
+
+GPIO.setmode(GPIO.BOARD)
+
+PGM_SWITCH = 36
+
+GPIO.setup(PGM_SWITCH, GPIO.OUT)
+
+GPIO.output(PGM_SWITCH, GPIO.HIGH)

pi_program.sh

@@ -17,9 +17,12 @@ DEVICE=atmega328p
 #FUSE BITS
 HIGH_FUSE=0xD8
 LOW_FUSE=0xFF
-EXT_FUSE=0xFD # due to masking, 0x05 = 0xFD, 0x07 = 0xFF, ***Note on an ATMEGA2560, ext fuse writes and verifies as 0xFD
+EXT_FUSE=0x05 # due to masking, 0x05 = 0xFD, 0x07 = 0xFF, ***Note on an ATMEGA2560, ext fuse writes and verifies as 0xFD
 LOCK=0x0F # due to masking, 0x0F = 0xCF
 
+#enable programming isolation switch
+sudo python enable_switch.py
+
 #erase and then write FUSE bits
 sudo avrdude -p $DEVICE -C /home/pi/avrdude_gpio.conf -c linuxspi -P /dev/spidev0.0 -b 125000 -D -v -e -u -U hfuse:w:$HIGH_FUSE:m -u -U lfuse:w:$LOW_FUSE:m -u -U efuse:w:$EXT_FUSE:m 2>/home/pi/fuse_results.txt
 
@@ -31,3 +34,6 @@ sleep 0.1
 
 #program flash and lock bits
 sudo avrdude -p $DEVICE -C /home/pi/avrdude_gpio.conf -c linuxspi -P /dev/spidev0.0 -b 2000000 -D -v -u -U flash:w:$firmware:i -u -U lock:w:$LOCK:m 2>/home/pi/flash_results.txt
+
+#DISable programming isolation switch
+sudo python disable_switch.py