Added script to wirelessly transfer compiled firmware script

scripts/canflash/README.md

@@ -1 +1,24 @@
 # CAN Flash
+
+## How to run the cantransfer.sh script
+
+### Check if there is a connection with the pi
+
+Type ``ping [ip address]`` in terminal, where ip address is the ip address of the pi.
+
+### Running the script
+
+Run the script by using the command ``sh cantransfer.sh 'bin_files' 'pi_username' 'host' 'destination_path``.
+
+Where the inputs are 'bin files' 'pi username' 'ip address' 'destination path':
+
+- Bin files is the path to where the compiled firmware .bin files are located.
+- Pi_username is the username of the raspberry Pi.
+- ip_address is the ip address of the Pi.
+- Destination path is the folder in the pi where the bin files will be transferred to in the Pi.
+  They will be placed relative to the Raspberry Pi's home directory.
+
+If the directory does not exist in the pi, the script will create the path in the pi relative to the home directory.
+
+If no directory is given in destination path, the bin file will be sent to the home directory of the pi: ``/home/pi_username/``.
+

scripts/canflash/cantransfer.sh

@@ -0,0 +1,49 @@
+#Check if all arguments have been passed
+if [ "$#" -lt 3 ]; then
+    echo "ERROR enter all arguments: sh cantransfer.sh 'bin_files' 'pi_username' 'IP_ADDRESS' 'destination_path'"
+    exit 1
+fi
+
+BIN_FILE=$1
+PI_USERNAME=$2
+IP_ADDRESS=$3
+
+if [ ! -z $4 ]; then
+  echo "4th arguement is: $4"
+  DESTINATION_PATH=$4
+fi
+
+# Check if the bin file exists
+if [ ! -f "$BIN_FILE" ]; then
+    echo "ERROR: File $BIN_FILE not found"
+    exit 1
+fi
+
+# If destination path is set as an argument; it will be set as the destination path
+# Otherwise it is set as the Pi's home directory
+# If the destination path is a file, the path will be the PI's home directory
+if [ ! -z $DESTINATION_PATH ]; then
+  # Check if the path to the Pi exists 
+  # Otherwise create create the path in the PI
+  echo "Check if '$DESTINATION_PATH' path exists on the Pi..."
+
+  ssh "$PI_USERNAME@$IP_ADDRESS" "test -d /home/$PI_USERNAME/$DESTINATION_PATH"
+
+  if [ $? -eq 1 ]; then
+    echo "Path doesn't exist, creating path in Pi..."
+    ssh "$PI_USERNAME@$IP_ADDRESS" "mkdir -p '$DESTINATION_PATH'"
+  else
+    echo "Path exists in Pi"
+  fi
+fi
+
+# Perform file transfer
+if [ ! -z $DESTINATION_PATH ]; then
+  echo "Transferring $BIN_FILE to $PI_USERNAME@$IP_ADDRESS:$DESTINATION_PATH."
+  scp "$BIN_FILE" "$PI_USERNAME@$IP_ADDRESS:$DESTINATION_PATH"
+else
+# If destination path is empty
+# The file will be placed in the the home directory
+  echo "Transferring $BIN_FILE to $PI_USERNAME@$IP_ADDRESS:/home/$PI_USERNAME."
+  scp "$BIN_FILE" "$PI_USERNAME@$IP_ADDRESS:/home/$PI_USERNAME"
+fi