pcb rev B0

• this board requires firmware 2.0 or newer
• #2 — fixed a limitation where the workstation drops you into an ok prompt when resetting the adapter
• #11 — fixed a bug where the adapter can hang until power cycled after being reset, especially when reset frequently
• #10 — added support for logging over UART_TX/UART_RX without disabling the sun keyboard interface
• reworked component layout and routing for sun interfaces and led indicators — none of the user-facing component locations have changed
• replaced transistors Q1 through Q4 (2N7000) with dual transistors Q1 and Q3 (2N7002DW)
• removed solder jumpers JP1 and JP2, which were added in rev A2 in case of errata

firmware 2.0

• pio_pkg_list.txt = dependency tree at time of release
• added support for adapters with pcb rev B0 — these use pinout v2, while older revs use pinout v1
• added a mouse baud setting that can be set to 9600 baud (default), 4800, 2400, or 1200 baud
  • this adds support for NeXTSTEP and Plan 9, which require the mouse to run at a lower baud rate (#8)
• you can now choose whether to save or discard settings changes when you close the menu
  • this change was made as part of a workaround for usb devices that malfunction when saving settings (#14); if you have any affected devices, hold Shift while pressing Enter to reboot the adapter after saving settings
• the displayed version number can now include uncommitted and/or unreleased changes (2.0+ / 2.0+1 / 2.0+1+)
• several other improvements to the user interface
  • you can now close the menu by pressing Esc
  • the menu now automatically closes after Reprogram idprom and Wipe idprom (AAh)
  • the menu now shows four menu items, rather than three menu items and the version number
  • Click duration now beeps to preview your changes, regardless of whether clicks are enabled
  • Reprogram idprom now tells you what hostid is being programmed into your idprom
• updated our usb host stack, making usb devices enumerate faster
  • Adafruit TinyUSB Library (2.0.1 → 3.1.0), Pico PIO USB (0.5.2 → 0.5.3)
  • this may affect compatibility with your usb devices; please report any regressions or improvements
• added support for logging over UART_TX/UART_RX without disabling the sun keyboard interface (#10)
  • this feature requires pcb rev B0 or newer, due to the pinout changes required
  • please report any regressions with the buzzer or sun mouse interface; the buzzer had to be moved from pio to hardware pwm, and the sun mouse had to be moved from hardware uart to pio
• added a debug cli over UART_RX — this lets you press keys and move the mouse without a usb keyboard or mouse
• the firmware can now be built as a normal program for linux, thanks to a new hardware abstraction layer; as a result:
  • added an interactive demo (run-demo.sh) that can be used to play with or develop the user interface
  • added a test suite (run-tests.sh) for the setup and pinout routines, sun keyboard interface (reset sequence), buzzer (click and bell), settings (reads, writes, upgrades), and menu (confirm-save, hostid, i/o)
  • we can catch some memory access violations with dynamic analysis by AddressSanitizer (asan)
• added some build tests (run-build-tests.sh) to catch compile errors with custom build flags
• fixed some potential future compatibility issues in the settings formats (variable-width integer types and variable struct padding)
  • your existing settings in their v1 formats will be upgraded automatically
• fixed a compile error when debug logging was enabled (PICOPROBE_ENABLE, now known as DEBUG_OVER_UART)
• fixed all compile warnings under -Wall with the current toolchains for pico and linux (via nix-shell)
• fixed incorrect debug log output for report id, usage, and usage page when enumerating usb hid devices
• fixed missing newline in debug log output when reporting ErrorRollOver inputs from usb keyboards
• fixed missing newline in UHID_VERBOSE output when reporting inputs from non-boot-protocol usb devices
• removed the splash screen from debug logging — this significantly slowed down the setup routine
• removed the fake sun emulation feature — this wasn’t too useful, and was broken by the pinout changes
• several changes to config.h
  • added DEBUG_OVER_CDC to disable logging over usb cdc
  • added UHID_LED_ENABLE to opt into experimental usb hid led support
  • added UHID_LED_TEST to blink leds on all usb keyboards
  • added pin definitions PINOUT_V2_PIN, KTX_ENABLE, DISPLAY_ENABLE, DEBUG_UART, SUNK_UART_V1, SUNK_UART_V2, and SUNM_UART_V1
  • removed SUNM_BAUD in favour of the new menu setting
  • renamed PICOPROBE_ENABLE to DEBUG_OVER_UART
  • renamed PICOPROBE_BAUD to DEBUG_UART_BAUD
  • renamed PICOPROBE_TX to DEBUG_UART_TX
  • renamed PICOPROBE_RX to DEBUG_UART_RX
  • SUN_KTX, SUN_KRX, SUN_MTX, and SUN_MRX were split into pinout v1 and v2 variants
  • DEBUG_OVER_UART no longer disables logging over usb cdc (see DEBUG_OVER_CDC)
  • SUNK_ENABLE was moved to platformio.ini, and takes precedence over DEBUG_OVER_UART in pinout v1
  • SUNM_ENABLE was moved to platformio.ini

pcb rev A3

• fixed the inconsistent and excessive brightness of the led indicators (D2, D3)
• fixed a bug where the VBUS indicator led (D2) can be dimly lit without VBUS being connected
• changed J1 from UJ2-ADH-W1-TH to the compatible USB-U267-BWS due to stock shortage
• cleaned up unused kicad libraries, and checked in libraries that were missing from the repo

firmware 1.5

• pio_pkg_list.txt = dependency tree at time of release
• added a macro to reprogram your idprom — this makes it easier to boot your workstation with a dead nvram battery
• added a macro to wipe your idprom — this makes your idprom contents invalid, as if you had a dead nvram battery
• added a hostid setting — this sets the hostid used when reprogramming your idprom
• changed behaviour of builtin led to turn on at the very start of setup — this may help troubleshoot problems with CDC serial port initialisation

firmware 1.4

• pio_pkg_list.txt = dependency tree at time of release
• fixed a serious bug where opening the settings menu can make the adapter start releasing keys at the wrong times
• fixed a serious bug where special key bindings (Right Ctrl) can get stuck down if Right Ctrl is released early
• you can now press special key bindings (Right Ctrl) together with other modifiers (e.g. Shift+Undo for Redo)
• improved performance of keyboard processing — this reduces the latency of key presses by up to 90 µs

you should update your firmware if you have any of the following symptoms:

• modifiers like Shift stop working after closing the settings menu
• modifiers like Shift appear to have a delayed effect after closing the settings menu
• when a key gets stuck down, it remains stuck even after pressing and releasing another key

you can also work around these bugs by resetting the adapter.

firmware 1.3

• pio_pkg_list.txt = dependency tree at time of release
• added firmware version to display — this replaces the logo, which became a bit redundant
• added marquee display for long menu items — this fixes a bug where they would wrap in an unreadable way

pcb rev A2

• added usb-c port J4 — this makes firmware updates much easier, and makes it possible to debug the sun keyboard and mouse interfaces simultaneously
• added polyfuse F3 after power supply switches — this protects the adapter under more fault conditions, in addition to faults in the downstream usb ports
• changed led resistors R12 and R13 from 200R to 1K — this reduces the luminous intensity from ~80% down to ~10% relative to 20mA
• changed tactile switches SW1 and SW2 from TS-1187A-C-H-B to TS-1187A-B-A-B — this reduces the extended parts fee with jlcpcb

firmware 1.2

• pio_pkg_list.txt = dependency tree at time of release
• added audible usb plug/unplug notifications
• added persistence for settings — including click duration!
• added “force click” setting — this replaces the old disable/enable click option in the settings menu, which toggled the same state as the host machine, with an independent override
• changed the initial click mode state to off
• changed the initial led indicator states to off
• fixed theoretical(?) race condition in buzzer management
• fixed errors in the README bindings table

pcb rev A1

• added display mechanical support — committed later in 74b367a12600d
• added tactile switches for reset and hard power key
• added header pins for debug logging over UART0
• added mounting holes for display mechanical support
• added LED indicators for VBUS and VSUN
• improved enclosure compatibility by moving mini-din beyond bottom edge
• improved ground plane islands by stitching vias
• made all corner mounting holes padded on both sides — previously this was only the case for the hole connected to GNDPWR, but not the other three

firmware 1.1

• pio_pkg_list.txt = dependency tree at time of release
• fixed regressions due to dependency updates
  • fixed panic regression with Pico Pio USB 0.5.2 by removing non-idempotent workaround for a bug that was fixed upstream (sekigon-gonnoc/Pico-PIO-USB#77)
  • worked around unsolved usb hid regression (adafruit/Adafruit_TinyUSB_Arduino#296) by pinning Adafruit TinyUSB Library to 2.0.1
• fixed panic when combining PICOPROBE_ENABLE and CFG_TINYUSB_DEBUG
• changed default DISPLAY_ROTATION to 0 — this better suits pcb rev A0 than the old value, and is equally suitable for the breadboard prototype
• changed debug/upload protocols to cmsis-dap — this fixes compatibility with new picoprobe firmware
• pinned sensitive dependencies to reduce future breakage — note that not all dependencies are pinned yet (platformio/platformio-core#4613), but see above for known-good dependency tree