RPi Zero keyboard test

configfs_test.sh

#!/bin/bash

sleep 15

# Create gadget
mkdir /sys/kernel/config/usb_gadget/mykeyboard
cd /sys/kernel/config/usb_gadget/mykeyboard

# Add basic information
echo 0x0100 > bcdDevice # Version 1.0.0
echo 0x0200 > bcdUSB # USB 2.0
echo 0x00 > bDeviceClass
echo 0x00 > bDeviceProtocol
echo 0x00 > bDeviceSubClass
echo 0x08 > bMaxPacketSize0
echo 0x0104 > idProduct # Multifunction Composite Gadget
echo 0x1d6b > idVendor # Linux Foundation

# Create English locale
mkdir strings/0x409

echo "My manufacturer" > strings/0x409/manufacturer
echo "My virtual keyboard" > strings/0x409/product
echo "0123456789" > strings/0x409/serialnumber

# Create HID function
mkdir functions/hid.usb0

echo 1 > functions/hid.usb0/protocol
echo 8 > functions/hid.usb0/report_length # 8-byte reports
echo 1 > functions/hid.usb0/subclass

# Write report descriptor
echo "05010906a101050719e029e71500250175019508810275089501810175019503050819012903910275019505910175089506150026ff00050719002aff008100c0" | xxd -r -ps > functions/hid.usb0/report_desc

# Create configuration
mkdir configs/c.1
mkdir configs/c.1/strings/0x409

echo 0x80 > configs/c.1/bmAttributes
echo 200 > configs/c.1/MaxPower # 200 mA
echo "Example configuration" > configs/c.1/strings/0x409/configuration

# Link HID function to configuration
ln -s functions/hid.usb0 configs/c.1

# Enable gadget
ls /sys/class/udc > UDC

sleep 15

/usr/local/bin/tester.sh &
# /usr/local/bin/tester.py &

tester.py

#!/usr/bin/env python3
#
# Python file to test the gadget by writing "Hello World!"
# If used with the configfs_test.sh, place this file under /usr/local/bin/tester.py
# and uncomment the appropriate line

NULL_CHAR = chr(0)

def write_report(report):
    with open('/dev/hidg0', 'rb+') as fd:
        fd.write(report.encode())


# H (press shift and H)
write_report(chr(32)+NULL_CHAR+chr(11)+NULL_CHAR*5)

# e
write_report(NULL_CHAR*2+chr(8)+NULL_CHAR*5)

# ll
write_report(NULL_CHAR*2+chr(15)+NULL_CHAR*5)
write_report(NULL_CHAR*8)
write_report(NULL_CHAR*2+chr(15)+NULL_CHAR*5)

# o
write_report(NULL_CHAR*2+chr(18)+NULL_CHAR*5)

# SPACE
write_report(NULL_CHAR*2+chr(44)+NULL_CHAR*5)

# W (press shift and W)
write_report(chr(32)+NULL_CHAR+chr(26)+NULL_CHAR*5)

# o
write_report(NULL_CHAR*2+chr(18)+NULL_CHAR*5)

# r
write_report(NULL_CHAR*2+chr(21)+NULL_CHAR*5)

# l
write_report(NULL_CHAR*2+chr(15)+NULL_CHAR*5)

# d
write_report(NULL_CHAR*2+chr(7)+NULL_CHAR*5)

# ! (press shift and 1)
write_report(chr(32)+NULL_CHAR+chr(30)+NULL_CHAR*5)

# Release all keys
write_report(NULL_CHAR*8)

tester.sh

#!/bin/bash
#
# Bash file to test the gadget by writing "Hello World!"
# If used with the configfs_test.sh, place this file under /usr/local/bin/tester.sh
# and uncomment the appropriate line

function write_report {
    echo -ne $1 > /dev/hidg0
}

# H (press shift and H)
write_report "\x20\0\xb\0\0\0\0\0"

# e
write_report "\0\0\x8\0\0\0\0\0"

# ll
write_report "\0\0\xf\0\0\0\0\0"
write_report "\0\0\0\0\0\0\0\0"
write_report "\0\0\xf\0\0\0\0\0"

# o
write_report "\0\0\x12\0\0\0\0\0"

# SPACE
write_report "\0\0\x2c\0\0\0\0\0"

# W (press shift and W)
write_report "\x20\0\x1a\0\0\0\0\0"

# o
write_report "\0\0\x12\0\0\0\0\0"

# r
write_report "\0\0\x21\0\0\0\0\0"

# l
write_report "\0\0\xf\0\0\0\0\0"

# d
write_report "\0\0\x7\0\0\0\0\0"

# ! (press shift and 1)
write_report "\x20\0\x1e\0\0\0\0\0"

# Release al keys
write_report "\0\0\0\0\0\0\0\0"

any idea how to write code to move the mouse? I have this but I can only move the mouse to the right and down as it's a syntax error to use negative values for the chr?

#!/usr/bin/env python3
NULL_CHAR = chr(0)
import time

def ms_write(report):
with open("/dev/hidg1", "wb+") as fd:
fd.write(report.encode())

ms_write(chr(1)+chr(0)+chr(0))
ms_write(NULL_CHAR*3)

any idea how to write code to move the mouse? I have this but I can only move the mouse to the right and down as it's a syntax error to use negative values for the chr?

#!/usr/bin/env python3 NULL_CHAR = chr(0) import time

def ms_write(report): with open("/dev/hidg1", "wb+") as fd: fd.write(report.encode())

ms_write(chr(1)+chr(0)+chr(0)) ms_write(NULL_CHAR*3)

While chr() is good for simple cases (or those that don't need negative values), I'd say you need to use the int.to_bytes() method (https://docs.python.org/3/library/stdtypes.html#int.to_bytes), which will allow you to specify that the value to convert is signed and needs to be stored in a single byte.