working alpha version

raspberry-pi/root/scripts/expose_usb.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+modprobe libcomposite
+cd /sys/kernel/config/usb_gadget/
+mkdir -p g1 && cd g1
+
+# Standard USB descriptors
+echo 0x1d6b > idVendor
+echo 0x0104 > idProduct
+echo 0x0100 > bcdDevice
+echo 0x0200 > bcdUSB
+
+mkdir -p strings/0x409
+echo "TALIA003512M" > strings/0x409/serialnumber
+echo "Debian" > strings/0x409/manufacturer
+echo "EmulatedDrive" > strings/0x409/product
+
+mkdir -p configs/c.1/strings/0x409
+echo "Storage and Serial" > configs/c.1/strings/0x409/configuration
+echo 500 > configs/c.1/MaxPower
+
+mkdir -p functions/mass_storage.usb0
+echo 1 > functions/mass_storage.usb0/stall
+echo 1 > functions/mass_storage.usb0/lun.0/removable
+# CRITICAL: Forces target PC to treat it as Read-Only
+echo 1 > functions/mass_storage.usb0/lun.0/ro 
+
+echo /usb_share.img > functions/mass_storage.usb0/lun.0/file
+ln -sf functions/mass_storage.usb0 configs/c.1/
+
+# Serial connection
+mkdir -p functions/acm.usb0
+ln -sf functions/acm.usb0 configs/c.1/
+
+# Bind to the physical controller to make it appear on the reading PC
+echo $(ls /sys/class/udc/) > UDC

raspberry-pi/root/scripts/serial-wait.sh

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+#!/bin/bash
+
+SERIAL_PORT="/dev/ttyGS0"
+stty -F "$SERIAL_PORT" raw
+
+while true
+do
+    if read -r line < "$SERIAL_PORT"
+    then
+        # wait for done message
+        if [ "$line" = "DONE" ]
+        then
+            echo "" > /sys/kernel/config/usb_gadget/g1/UDC
+            exit
+        fi
+    fi
+    sleep 0.5
+done

raspberry-pi/root/scripts/wait.sh

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+#!/bin/bash
+
+SERIAL_PORT="/dev/ttyGS0"
+USB_FILE="/usb_share.img"
+USB_MOUNT="/mnt/usb_share/"
+LOCAL_DIR="/var/local/talia/"
+FTP_DIR="/home/birikim/out/"
+
+while sleep 3
+do
+    if [ -z "$(cat /sys/kernel/config/usb_gadget/g1/UDC)" ] && \
+       [ -n "$(ls -A $FTP_DIR)" ]
+    then
+        mount $USB_FILE $USB_MOUNT
+        rm -rf $USB_MOUNT/talia-sd
+        mkdir $USB_MOUNT/talia-sd
+
+        # wait writes to be completed
+        while inotifywait -t 60 -r -e close_write -e moved_to "$FTP_DIR"
+        do
+            true
+        done
+
+        # lock dir and mv files to USB storage
+        chown -R root:root $FTP_DIR
+        cd $FTP_DIR
+        for i in $(ls -A $FTP_DIR)
+        do
+            mv "$i" $USB_MOUNT/talia-sd/
+        done
+        chown -R birikim:birikim $FTP_DIR
+        cd $USB_MOUNT/talia-sd/
+        # md5sum
+        find -type f -exec md5sum {} \; > /tmp/talia-md5sum.txt
+        sed -i "s/.\///" /tmp/talia-md5sum.txt
+        cd /tmp
+        mv talia-md5sum.txt $USB_MOUNT/talia-sd/
+        umount $USB_MOUNT
+
+        # expose USB storage
+        /root/scripts/expose_usb.sh
+        # wait serial
+        systemctl start talia-serial-wait.service
+    fi
+done