Add start script to simplify oled install

.gitignore

@@ -4,3 +4,6 @@ core
 .idea/
 .DS_Store
 *.swp
+__pycache__
+src/web/current
+src/oled_monitor/current

src/oled_monitor/rascsi_oled_monitor.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
 #
 # RaSCSI Updates:
 #   Updates to output rascsi status to an OLED display

src/oled_monitor/requirements.txt

@@ -0,0 +1,14 @@
+Adafruit-Blinka==6.3.2
+adafruit-circuitpython-busdevice==5.0.6
+adafruit-circuitpython-framebuf==1.4.6
+adafruit-circuitpython-ssd1306==2.11.1
+Adafruit-PlatformDetect==3.2.0
+Adafruit-PureIO==1.1.8
+Pillow==8.1.2
+pkg-resources==0.0.0
+pyftdi==0.52.9
+pyserial==3.5
+pyusb==1.1.1
+rpi-ws281x==4.2.5
+RPi.GPIO==0.7.0
+sysv-ipc==1.1.0

src/oled_monitor/start.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+set -e
+# set -x # Uncomment to Debug
+
+cd $(dirname $0)
+# verify packages installed
+ERROR=0
+if ! command -v dpkg -l i2c-tools &> /dev/null ; then
+    echo "i2c-tools could not be found"
+    echo "Run 'sudo apt install i2c-tools' to fix."
+    ERROR=1
+fi
+if ! command -v python3 &> /dev/null ; then
+    echo "python3 could not be found"
+    echo "Run 'sudo apt install python3' to fix."
+    ERROR=1
+fi
+# Dep to build Pillow
+if ! dpkg -l python3-dev &> /dev/null; then
+    echo "python3-dev could not be found"
+    echo "Run 'sudo apt install python3-dev' to fix."
+    ERROR=1
+fi
+if ! dpkg -l libjpeg-dev &> /dev/null; then
+    echo "libjpeg-dev could not be found"
+    echo "Run 'sudo apt install libjpeg-dev' to fix."
+    ERROR=1
+fi
+if ! dpkg -l libpng-dev &> /dev/null; then
+    echo "libpng-dev could not be found"
+    echo "Run 'sudo apt install libpng-dev' to fix."
+    ERROR=1
+fi
+# Dep to build Pollow
+if ! python3 -m venv --help &> /dev/null ; then
+    echo "venv could not be found"
+    echo "Run 'sudo apt install python3-venv' to fix."
+    ERROR=1
+fi
+if [ $ERROR = 1 ] ; then
+  echo
+  echo "Fix errors and re-run ./start.sh"
+  exit 1
+fi
+
+if ! i2cdetect -y 1 &> /dev/null ; then
+    echo "i2cdetect -y 1 did not find a screen."
+    exit 2
+fi
+if ! test -e venv; then
+  echo "Creating python venv for OLED Screen"
+  python3 -m venv venv
+  echo "Activating venv"
+  source venv/bin/activate
+  echo "Installing requirements.txt"
+  pip install -r requirements.txt
+  git rev-parse HEAD > current
+fi
+
+source venv/bin/activate
+
+# Detect if someone updates - we need to re-run pip install.
+if ! test -e current; then
+  git rev-parse > current
+else
+  if [ "$(cat current)" != "$(git rev-parse HEAD)" ]; then
+      echo "New version detected, updating requirements.txt"
+      echo " This may take some time..."
+      pip install wheel
+      pip install -r requirements.txt
+      git rev-parse HEAD > current
+  fi
+fi
+
+echo "Starting OLED Screen..."
+python3 rascsi_oled_monitor.py