#!/bin/bash
# Translates the windows Arduino IDE upload call - something like..
#
# upload_router ttyUSB0 1 1EAF:0003 /tmp/build9114565021046468906.tmp/STM32_Blink.cpp maple_dfu 0
#
# to the linux dfu-util equivalent of the form...
#
# dfu-util -D ./STM32_Blink.cpp.bin -d 1eaf:0003 --intf 0 --alt 1
#
#

function leaf_status() 
{

this_leaf_status=$(lsusb |grep "1eaf" | awk '{ print $NF}')
# Find the mode of the leaf bootloader
case $this_leaf_status in 
   "1eaf:0003")
      echo "dfu"
   ;;
   "1eaf:0004")
      echo "ttyACMx"
   ;;
   *)
      #echo "$this_leaf_status"
      echo "unknown"
   ;;
esac
}


DEVICE="$3"
# Lowercase the 1eaf device name, since in Windows land everybody shouts.
DEVICE=${DEVICE,,}

BINFILE="$4.bin"
INTERFACE="$6"
ALT_INTERFACE="$2"

# You will need the usb-reset code, see https://github.com/rogerclarkmelbourne/Arduino_STM32/wiki/Using-a-generic-stm32-board-on-linux-with-Maple-bootloader
#
USBRESET=$(which usb-reset) || USBRESET="./usb-reset"

# Check to see if a maple compatible board is attached
LEAF_STATUS=$(leaf_status)

# Borard not found, or no boot loader on board.
if [[ $(leaf_status) = "unknown" ]]
then
   echo "STM32 Maple Bootloader compatible board not found."
   sleep 5
   exit 1
fi

# We got this far, so we need to get the board in bootloader mode. 
# After the timeout period, the board goes back in to serial mode, we need it in dfu mode, which happens for the first few seconds at power on 
# so we ask the user to unplug and re-plug the board. 
echo -e "\n\rSTM32 Maple board is in $LEAF_STATUS mode."

echo "Please unplug and replug the USB cable to the Maple device."
sleep 2
# On unplugging the board will be "unknown"
while [[ $(leaf_status) != "unknown" ]]
do
   echo -n "."
   sleep 1
done
# On re-plugging the board will be "dfu"
while [[ $(leaf_status) != "dfu" ]]
do
   echo -n "."
   sleep 1
done

echo -e "\n\rProgramming STM32 device with dfu-util"
until dfu-util  -D "$BINFILE" -d "$DEVICE" --intf "$INTERFACE" --alt "$ALT_INTERFACE" 2>&1
do
    echo -n "."
    sleep 1
done

echo -e "\n\rUnplug and replug the USB cable to the STM32 board again please...."
while [[  $(leaf_status) != "unknown" ]]
do
    echo -n "."
    sleep 1
done

echo -e "\n\rReconnecting"
while [[ $(leaf_status) = "unknown" ]]
do
    echo -n "."
    sleep 1
done

echo -e "\n\rWaiting for bootloader to exit."
for i in {1..6}
do
    echo -n "."
    sleep 1
done

"$USBRESET" "/dev/bus/usb/$(lsusb |grep "1eaf" |awk '{print $2,$4}'|sed 's/\://g'|sed 's/ /\//g')" >/dev/null 2>&1

while [[ $(leaf_status) = "unknown" ]]
do
    echo -n "."
    sleep 1
done
THIS_TTY=$(find /dev/ttyACM* -cmin -2)
echo -e "\n\rSTM32 Maple board serial port re-created..."
echo -e "\n\rSerial port is $THIS_TTY Please allow 15 seconds before attempting to read from serial port."