View Source GRiSP 2 Support
This might be the base Nerves System configuration for the GRiSP 2.
This is a work in progress. It may change in backwards incompatible ways and the documentation might be lacking.
To do:
- [x] Bring up Ethernet
- [x] Bring up WiFi (currently requires unreleased VintageNetWiFi)
- [x] Verify RGB LEDs
- [ ] Verify DIP switches
- [ ] Enable 1-Wire and test
- [ ] Verify SPI
- [x] Verify MicroSD card works
- [ ] Verify ATECC608B
- [ ] Verify HW watchdog
- [ ] Add ramoops support
- [ ] Review GRiSP2 specs to see what else there is to verify
- [x] Check that
TARGET_GCC_FLAGS
are right - [x] Update Linux kernel to 5.10
- [x] Update Nerves Toolchain 1.5.0 version
- [x] Implement A/B firmware updates work
- [ ] Create example app that uses GRiSP2? Perhaps Nerves Livebook?
- [ ] Review Linux kernel options and compare with other systems
- [ ] Clean up debug and low hanging items to improve boot time
- [ ] Clean up changes to GRiSP repositories and send PRs
Feature | Description |
---|---|
CPU | NXP iMX6ULL, ARM Cortex-A7 @ 696 MHz |
Memory | 512 MB DRAM |
Storage | 4 GB eMMC and optional MicroSD |
Linux kernel | 5.10 w/ Phytec patches |
IEx terminal | ttymxc0 |
GPIO, I2C, SPI | Yes - Elixir Circuits |
LEDs | Yes - grisp-rgb[12]-(red or blue or green) via sys/class/leds |
ADC | - |
PWM | - |
UART | ttymxc0-ttymxc5 |
Camera | None |
Ethernet | Yes |
WiFi | Yes - 2.4GHz |
HW Watchdog | i.MX6 watchdog enabled on boot |
Using
The most common way of using this Nerves System is create a project with mix nerves.new
and to export MIX_TARGET=grisp2
. See the Getting started
guide
for more information.
If you need custom modifications to this system for your device, clone this repository and update as described in Making custom systems
Boot notes
This system isn't ready for general use. If you know how to build a Nerves system, then it will probably be a little frustrating, but you'll get something to boot.
Build the system
Create a test Nerves project or modify
circuits_quickstart
to use it. Until the Linux kernel is updated, you'll have to delete all other Nerves systems to avoid dependency conflicts on the toolchain.Build the project with
mix firmware
. Then runmix firmware.image
to get an image file.gzip the image file and copy to a FAT-formatted MicroSD card
Boot the GRiSP2, but press a key to break into the bootloader.
Run:
uncompress /mnt/mmc/myfirmware.img.gz /dev/mmc1 reset
Now you should be able to use
mix upload
or./upload.sh
for subsequent updates. The firmware is set to auto-validate.
Console access
The console is configured to output to ttymxc0
by default.
TODO: Change to a UART that's doesn't require the debug daughter board.
Provisioning devices
TODO: The GRiSP 2 includes an ATECC608A so provisioning the board for use with NervesHub can be done without setting U-Boot environment variables.
Linux versions
TBD
We're currently using PHYTEC's Linux kernel fork from git.phytec.de/linux-mainline.