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105 lines
4.2 KiB
Markdown
105 lines
4.2 KiB
Markdown
# Tillitis TKey Quickstart
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This document describes how to build the FPGA bitstream, including the
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firmware, and get this programmed onto the flash memory of the
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Tillitis TKey USB device.
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*Note well*: If you have a TKey which already has been flashed, then
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you don't need to do anything unless you want to set your own Unique
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Device Secret (UDS). You can start running apps on it immediately. See
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[tillitis-key1-apps](https://github.com/tillitis/tillitis-key1-apps)
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for a few examples.
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The Tillitis TKey kit includes:
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- Tillitis TKey USB stick with USB-C plug, marked MTA1-USB V1
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- Programmer board based on Raspberry Pi Pico, with a white holder/jig
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- USB cable with micro-B plug, for connecting the programmer to
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computer
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- USB-C extension cable
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- USB-C to USB-A adapter
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## Programming FPGA bitstream and firmware onto TKey
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Connect the programmer to the computer using the USB cable with
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micro-B plug.
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Place the TKey USB stick correctly in the programming jig and close
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the hatch.
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The USB stick can remain in the jig during repeated development,
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programming and testing cycles. The USB stick should then be connected
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to the computer using the provided USB-C cable (use the USB-C-to-A
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adapter if needed). The jig also has a cutout to allow touching where
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the touch sensor is located (next to the LED on the outer edge). Note
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that connecting the USB stick to the computer is not required for
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programming it. Note also that with this setup, to reset the USB stick
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back to firmware mode after loading an app, you need to unplug both
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the USB cable to the stick and the one to the programmer.
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Alternatively, you can try the script in
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`../hw/application_fpga/tools/reset-tk1` which pokes at the TKey
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that's sitting in the jig, leaving it in firmware mode so that a new
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app can be loaded.
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On Linux, `lsusb` should list the connected programmer as `cafe:4004
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Blinkinlabs ICE40 programmer`. If the USB stick is also connected it
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shows up as `1207:8887 Tillitis MTA1-USB-V1`.
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To install the software needed for building and programming, please
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refer to [toolchain_setup.md](toolchain_setup.md).
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You are now ready to generate the FPGA bitstream (including building
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the standard firmware) and program it onto the flash memory of the USB
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stick. Note that this will give a default Unique Device Secret. If you
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want to personalize your TKey, see under Device personalization below
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first.
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The following should be run as your regular non-root user, but
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the programming is currently done using `sudo` (so sudo is expected to
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be set up for your user; the Makefile runs `sudo tillitis-iceprog …`).
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```
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$ git clone https://github.com/tillitis/tillitis-key1
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$ cd tillitis-key1/hw/application_fpga
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$ make prog_flash
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```
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After programming, the TKey can be connected to your computer (use the
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USB-C-to-A adapter if needed) and will boot the firmware. When boot
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has completed the LED will be steady white. This indicates that it is
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ready to receive and measure an app.
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To try out an app, continue to the README.md the apps repo:
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https://github.com/tillitis/tillitis-key1-apps#readme
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To learn more about the concepts and workings of the firmware, see:
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[system_description/system_description.md](system_description/system_description.md)
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and [system_description/software.md](system_description/software.md).
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## Device personalization - setting Unique Device Secret (UDS)
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To personalize your TKey you need to modify the Unique Device Secret
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(UDS) and, maybe, the Unique Device Identity (UDI).
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The simplest way to generate a new UDS is to:
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```
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$ cd tillitis-key1/hw/application_fpga
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$ make secret
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```
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Then proceed with the `make prog_flash` as discussed above.
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In detail: You need to modify the hex file that contains the Unique
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Device Secret (UDS). You might also want to update the Unique Device
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Identity (UDI). These hex files are located in
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`hw/application_fpga/data/`. Note that after modify the files in this
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directory, you need to rebuild and program the device again (as
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above).
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To make this easier there is a tool that can generate these files. The
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tool can be found in `hw/application_fpga/tools/tpt`. The tool by
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default allow you to supply a secret used as part of the UDS
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generation and only generates a new `uds.hex`. See `--help` for more
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flags.
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