Subversion Repositories neorv32

#!/usr/bin/env bash

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 <port> <NEORV32 executable>"

  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 clocal cread

# 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 "u" > $1                    # send upload command 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 3s                           # 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."