SYNOPSIS

mxt-app [command] [options]...

DESCRIPTION

mxt-app is a utility for managing Atmel maXTouch touch controllers and other devices that support Atmel Object Based Protocol.

If no command is not given, mxt-app will provide an interactive menu based interface.

OBJECT PROTOCOL

The Atmel Object Based Protocol defines how device registers (normally accessed via I2C) are mapped to different functions within the devices. This interface organises the register map into separate objects each of which is given a T number. mxt-app can inspect and alter the object configuration, and view diagnostic data, while the device is running.

For a description of object protocol, see Atmel AT42QT1085 Object Protocol Guide, available from atmel.com.

The meaning of the configuration bytes within the objects may be found in the Protocol Guide documentation released with each device, and is only provided by Atmel under NDA.

GENERAL COMMANDS

-h [--help]

Display a brief summary of available options and exit.

-i [--info]

Print the ID information and object table.

-M [--messages] [*timeout*]

Prints the messages until timeout seconds have passed. If no timeout is provided, continue until user presses Ctrl-C. Zero timeout reads once. Provide -F [--msg-filter] option to filter by a specific object.

-F [--msg-filter] *TYPE*

Filters messages by object TYPE.

--reset

Reset device.

--calibrate

Send calibrate command.

--backup[*=COMMAND*]

Backup configuration to NVRAM where the optional argument, COMMAND, is the BACKUPNV command.

-g

Write Golden Reference calibration to NVRAM.

--self-cap-tune-config

Tune and calibrate the self capacitance settings and store them to the device configuration.

--self-cap-tune-nvram

Tune and calibrate the self capacitance settings and store them to NVRAM without updating the Config Checksum.

--version

print version of mxt-app.

--block-size *BLOCKSIZE*

Sets the i2c block size.

CONFIGURATION FILE COMMANDS

--load *FILE*

Upload config from FILE, write it to NVRAM, and reset device. The configuration may be in .xcfg or OBP_RAW format.

--save *FILE*

Save config to FILE in either OBP_RAW or .xcfg format.

--checksum *FILE*

Read the contents of FILE and recalculate the configuration checksum.

REGISTER READ/WRITE COMMANDS

-R [--read]

Read data from the device.

-W [--write]

Write data to the device.

-n [--count] *COUNT*

read/write COUNT registers

-f [--format]

format register output

-I [--instance] *INSTANCE*

select object INSTANCE

-r [--register] *REGISTER*

start at REGISTER (offset in object when used with TYPE)

-T [--type] *TYPE*

select object TYPE

--zero

zero all configuration settings

EXAMPLES

Read info block:

$ mxt-app -R -n7 -r0
82 19 11 AA 18 0E 16

Read T7 Power Config object:

$ mxt-app -R -T7
32 FF 05 43

Zero first two bytes of T7:

$ mxt-app -W -T7 0000

Read T7 Power Config object, formatted output:

$ mxt-app -R -T7 --format
GEN_POWERCONFIG_T7
00: 0x00    0 0000 0000
01: 0x00    0 0000 0000
02: 0x05    5 0000 0101
03: 0x43   67 0100 0011

TCP SOCKET COMMANDS

mxt-app supports connection over TCP using a ASCII protocol which allows mxt-app to act as a bridge so that Atmel proprietary tools such as Object Server can access the device.

-C [--bridge-client] *HOST*

Connect over TCP to HOST

-S [--bridge-server]

Start TCP socket server

-p [--port] PORT

TCP port (default 4000)

BOOTLOADER COMMANDS

--bootloader-version

Query and print ID and version of bootloader.

--flash *FIRMWARE*

Flash FIRMWARE to device. The firmware file should be in .enc format.

--reset-bootloader

Reset device in bootloader mode. In bootloader mode the device will cease normal operation until a firmware is sent. The I2C address or USB PID will change. The only valid command in this mode is --flash. A hard power cycle will return the device to normal Object Protocol mode, unless the firmware image is corrupted. This command is only provided for debugging purposes: in most cases --flash will manage the change to/from bootloader mode before/after flash.

--firmware-version *VERSION*

The .enc file format does not provide the firmware version in a form available to mxt-app. If it is provided via this switch, mxt-app can check firmware VERSION before and after flash. It will skip the flash process if the firmware version is already correct. It will also check for a successful flash on completion. The version must be provided in the format 1.0.AA. # T25 SELF TEST OPTIONS

The Self Test T25 object runs self-test routines in the device to find faults in the sense lines and electrodes. The Self Test T25 object runs a series of test sequences.

-t [--test]

Run all self tests.

-t*XX* [--test=*XX*]

Run individual self test specified by the CMD hex value.

-t01

run analog power test.

-t11

run pin fault test.

-t12

run pin fault 2 test.

-t13

run AND gate test.

-t17

run signal limit test.

-t20

run gain test.

-t21

run offset fault test.

T37 DIAGNOSTIC DATA OPTIONS

Capture frames of diagnostic data. The default mode is to capture touch deltas. Self capacitance measurements are only available on some devices.

--debug-dump *FILE*

The T37 Diagnostic Data object provides raw access to touch reference/delta measurements from the touch screen. Diagnostic data is written to FILE in CSV format. The format is compatible with the Atmel Hawkeye utility.

--frames *N*

Capture N frames of data.

--references

Capture references data.

--self-cap-signals

Capture self cap signals.

--self-cap-deltas

Capture self cap deltas.

--self-cap-refs

Capture self cap references.

--active-stylus-deltas

Capture active stylus deltas.

--active-stylus-refs

Capture active stylus references.

T68 SERIAL DATA COMMANDS

--t68-file *FILE*

Upload FILE to the device via the T68 Serial Data object.

--t68-datatype *DATATYPE*

Set DATATYPE of the file. This will be automatically detected from the file itself in most cases.

FINDING AND SPECIFYING DEVICE

By default mxt-app will scan available devices and connect to the first device it finds.

-q [--query]

Scan for devices and output a list.

-d [--device] *DEVICESTRING*

Connect to a particular device specified by DEVICESTRING which is given in the same format as output by --query.

There are three connection methods supported for hardware access:

sysfs

This is used in conjunction with the Linux kernel driver. It accesses sysfs attributes under the directory

/sys/bus/i2c/drivers/dddddddd/b-00xx/

Where

d

driver name - atmel_mxt_ts, Atmel MXTXXXX, etc

b

i2c adapter

xx

i2c address

A specific USB device can be specified by giving a device option -d sysfs:PATH as given by -q/--query option

The sysfs attributes used under this directory are

mem_access

Access to raw I2C address space.

debug_enable

Output messages from the device to dmesg log as hexadecimal.

debug_v2_enable, debug_msg, debug_notify

Optional improved binary interface to retrieve messages

They are provided when using the Atmel kernel driver from github, and may be supported by other devices.

USB

Many maXTouch devices support a USB mode which reports touches via USB HID. In addition, evaluation boards may use a "bridge chip" which interfaces I2C to the same protocol.

USB mode will be built by autotools when libusb is available.

A specific USB device can be specified by giving a device option -d usb:001-003 which corresponds to the bus and device numbers given by the -q/--query option and lsusb.

I2C debug interface

Devices can be accessed directly via the i2c-dev I2C debug interface by giving adapter and address on command line.

The i2c-dev interface is documented in the Linux kernel source, in Documentation/i2c/dev-interface

The I2C debug interface support must be enabled using the CONFIG_I2C_CHARDEV kernel configuration option. It is enabled on a system if files /dev/i2c-* are present.

To use i2c-dev, provide a device string such as -d i2c-dev:1-004a.

Messages from the maXTouch devices are read by polling. If a kernel driver is also present on the system, reading messages on interrupt, then no messages will be received by the tool. A workaround is to set T18.COMMAND (byte 1) to 2 "Force the CHG line high (inactive)" so the kernel driver does not receive an interrupt.

There is no scanning support. This is because reading from every possible maXTouch address on every I2C bus might adversely affect some unrelated hardware that does not understand Object Protocol. You must manually identify the correct adapter and address by reference to the protocol guide or to the platform setup.

It is possible to use the --flash command with a device already in bootloader mode, by specifying the bootloader address.

HIDRAW

The hidraw backend supports maXTouch devices which connect using USB or HID over I2C.

The hidraw interface is documented in the Linux kernel source, in Documentation/hid/hidraw.txt

The device must have /dev/hidraw raw HID device support enabled using the CONFIG_HIDRAW kernel configuration option.

To use hidraw, provide a device string such as -d hidraw:/dev/hidraw0.

There is no scanning support.

Bootloading is not supported in this mode.

DEBUG OPTIONS

-v [--verbose] *LEVEL*

set debug level. LEVEL is one of 0 (Silent), 1 (Warnings and Errors), 2 (Info - default), 3 (Debug), 4 (Verbose). Debug and Verbose are only available if built in.

COMPILING FROM SOURCE

To download the source code using git:

git clone https://github.com/atmel-maxtouch/mxt-app.git

There are two build harnesses, for Android and autotools:

Android

To download libusbdroid submodule:

git submodule init
git submodule update

To compile using Android NDK:

ndk-build

To enable debug:

ndk-build NDK_DEBUG=1

To enable PIE support (for Android L):

ndk-build APP_PLATFORM=android-16

Binaries will be placed in libs/

The Android NDK is available from https://developer.android.com/tools/sdk/ndk/

Running on Android

adb push libs/armeabi/mxt-app /data/local/tmp/
adb shell /data/local/tmp/mxt-app [command]

If executable permissions have not been set, run:

adb shell chmod 777 /data/local/tmp/mxt-app

autotools

To compile using autotools:

./autogen.sh && make

To cross-compile:

./autogen.sh --host=arm-linux-gnueabi && make

To enable debug:

./autogen.sh --enable-debug

To enable generation of the man page using pandoc:

./autogen.sh --enable-man

To build the doxygen documentation (this requires doxygen and graphviz to be installed):

make doc

VERSION NUMBERING

A version number is generated by git describe during the build process and is reported by --version and to debug logs.

A typical version might be 1.15-29-g8321 which means, 29 commits after the release tag 1.15, with a git SHA id beginning with 8321.

If the source is not checked out using git (for example by clicking on the github "Download ZIP" link), then the version from the file VERSION in the source archive is used.

The suffix -mod is appended if there are uncommitted changes in the source code.

TROUBLESHOOTING

klogctl error

If you see the warning

W: klogctl error 1 (Operation not permitted)

this indicates that mxt-app has been unable to retrieve messages from dmesg. Various features will not work properly. It may be possible to unrestrict dmesg by doing

# echo 0 > /proc/sys/kernel/dmesg_restrict