[sw/image_gen] added script to directly upload an executable to the bootloader from the console

sw/image_gen/uart_upload.sh

@@ -0,0 +1,58 @@
+#!/bin/sh
+
+set -e
+
+# Simple script to upload executable to bootloader
+
+if [ $# -ne 2 ]
+then
+  echo "Upload image via serial port (UART) to the NEORV32 bootloader."
+  echo "Reset processor before starting the upload."
+  echo "Usage:   [sudo] sh uart_upload.sh <tty> <file>"
+  echo "Example: sh uart_upload.sh /dev/ttyS6 neorv32_exe.bin"
+  exit
+fi
+
+# configure serial port
+stty -F "$1" 19200 -hup raw -echo -echoe -echok -echoctl -echoke -crtscts cs8 -cstopb noflsh
+
+# trigger fast upload mode and get response
+exec 3<$1                              # redirect serial output to fd 3
+  cat <&3 > uart_upload.response.dat & # redirect serial output to file
+  PID=$!                               # save pid to kill cat
+    printf "#" > $1                    # send fast/silent upload to serial port
+    sleep 0.5s                         # wait for bootloader response
+  kill $PID                            # kill cat process
+
+exec 3<&- # free fd 3
+
+# check response
+if ! grep -Fq "Awaiting neorv32_exe.bin" uart_upload.response.dat;
+then
+  echo "Bootloader response error."
+  echo "Reset processor before starting the upload."
+  rm -f uart_upload.response.dat
+  exit
+fi
+
+# send executable and get repsonse
+echo -n "Uploading... "
+exec 3<$1                              # redirect serial output to fd 3
+  cat <&3 > uart_upload.response.dat & # redirect serial output to file
+  PID=$!                               # save pid to kill cat
+    cat "$2" > "$1"                    # send executable to serial port
+    sleep 0.5s                         # wait for bootloader response
+  kill $PID                            # kill cat process
+
+exec 3<&- # free fd 3
+
+# check response
+if ! grep -Fq "OK" uart_upload.response.dat;
+then
+  echo "Upload error."
+  rm -f uart_upload.response.dat
+  exit
+fi
+
+rm -f uart_upload.response.dat
+echo "Done."