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This document describes how to build the FPGA bitstream, including the
firmware, and get this programmed onto the flash of the Tillitis Key 1
USB device.
firmware, and get this programmed onto the flash memory of the
Tillitis Key 1 USB device.
The Tillitis Key 1 kit includes:
- Tillitis Key 1 USB device, marked MTA1-USB V1
- Programmer board based on Raspberry Pi Pico, with a white device
holder/jig
- USB-cable with micro-B plug, for connecting the programmer to
- Tillitis Key 1 USB stick with USB-C plug, marked MTA1-USB V1
- Programmer board based on Raspberry Pi Pico, with a white holder/jig
- USB cable with micro-B plug, for connecting the programmer to
computer
- USB-C cable
- USB-C extension cable
- USB-C to USB-A adapter
# Programming FPGA bitstream and firmware onto Tillitis Key 1
Connect the programmer to the computer using the mentioned cable. It
is convenient to connect the USB device to the USB-C cable, and then
connect the cable to the computer. The latter using the USB-C-to-A, if
needed.
Connect the programmer to the computer using the USB cable with
micro-B plug.
`lsusb` should list two new devies: `cafe:4004 Blinkinlabs ICE40 programmer`
and `1207:8887 Tillitis MTA1-USB-V1`.
Place the Tillitis Key 1 (the USB stick) correctly in the programming
jig and close the hatch.
The USB device is then placed correctly in the programming jig, and
the hatch closed. The USB device can remain in the jig during repeated
programming and testing cycles. The jig has a cutout to allow for
touching next to the LED where the touch sensor is located.
The USB stick can remain in the jig during repeated development,
programming and testing cycles. The USB stick should then be connected
to the computer using the provided USB-C cable (use the USB-C-to-A
adapter if needed). Note that connecting the USB stick to the computer
is not required for programming it. For this purpose, the jig also has
a cutout to allow touching where the touch sensor is located, next to
the LED.
On Linux, `lsusb` should list the connected programmer as `cafe:4004
Blinkinlabs ICE40 programmer`. If the USB stick is also connected it
shows up as `1207:8887 Tillitis MTA1-USB-V1`.
To install the software needed for building and programming, please
refer to [toolchain_setup.md](toolchain_setup.md).
You are now ready to generate the FPGA bitstream including the standard
firmware, and program the flash on the connected USB device. This should be run
as your regular non-root user, but the the programming is done (in the
Makefile) with `sudo tillitis-iceprog` (so sudo is expected be set up).
You are now ready to generate the FPGA bitstream (including building
the standard firmware) and program it onto the flash memory of the USB
stick. The following should be run as your regular non-root user, but
the programming is currently done using `sudo` (so sudo is expected to
be set up for your user; the Makefile runs `sudo tillitis-iceprog …`).
```
$ git clone https://github.com/tillitis/tillitis-key1
@ -42,22 +47,24 @@ $ cd tillitis-key1/hw/application_fpga
$ make prog_flash
```
After programming, when your device is connected to the host, it would boot the
firmware. When boot has completed, the device will start flashing the LED
white. This indicates that the device is ready to receive and measure an app.
After programming, the Tillitis Key 1 USB stick can be connected to
your computer (use the USB-C-to-A adapter if needed) and will boot the
firmware. When boot has completed it will start flashing the LED
white. This indicates that it is ready to receive and measure an app.
# Device personalization
To personalize the device, you need to modify the hex file that contains the
Unique Device Secret (UDS). You should also update the Unique Device Identity
(UDI). These hex files are located in `hw/application_fpga/data/`. Note that
after modify the files in this directory, you need to rebuild and program the
device again (as above).
To personalize Tillitis Key 1, you need to modify the hex file that
contains the Unique Device Secret (UDS). You should also update the
Unique Device Identity (UDI). These hex files are located in
`hw/application_fpga/data/`. Note that after modify the files in this
directory, you need to rebuild and program the device again (as
above).
To make this easier there is a tool that can generate these files. The tool can
be found in `hw/application_fpga/tools/tpt`. The tool allow you to supply a
secret used as part of the UDS generation. The tool can be run interactively,
or by suppling inputs on the command line:
To make this easier there is a tool that can generate these files. The
tool can be found in `hw/application_fpga/tools/tpt`. The tool allow
you to supply a secret used as part of the UDS generation. The tool
can be run interactively, or by suppling inputs on the command line:
```
usage: tpt.py [-h] [-v] [--uss USS] [--vid VID] [--pid PID] [--rev REV] [--serial SERIAL]