mirror of
https://github.com/Keychron/qmk_firmware.git
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119 lines
4.0 KiB
Markdown
119 lines
4.0 KiB
Markdown
# HHKB Alternate Controller (YANG HHKB BLE Mod)
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An alternative controler for the HHKB designed by YANG (yangdigi)
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based on the hasu controller.
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* Keyboard Maintainer: [Kan-Ru Chen](https://github.com/kanru)
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* Hardware Supported: YANG HHKB BLE Controller
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* Hardware Availability: https://kbdfans.com/products/hhkb-ble-mod-upgrade-module
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Make example for this keyboard (after setting up your build environment):
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make hhkb/yang:default
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To flash, first boot your keyboard into bootloader (hold ESC and attach usb cable)
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then a virtual USB storage should appear. You can copy the `hhkb_yang_default.bin`
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file to the virtual USB storage and override the `HHKB_BLE.BIN` file in there.
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Make sure to unmount and eject the virtual USB storage.
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## Features:
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- [x] QMK (via USB)
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- [x] Bluetooth (BLE)
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- [x] Power saving mode
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- [x] Idle mode
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- [x] Deep sleep mode
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- [x] LEDs
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- [x] Battery service
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- [x] Special commands
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- [x] Switch BT peer
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## Entering flash mode
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Different ways to enter flash mode:
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* Press and hold the ESC key. Insert the USB cable to enter the flash
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mode. When the OS shows the drive disk, you can release the key.
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* Use the magic command LSHIFT+RSHIFT+B to reboot to bootloader then
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quickly hold the ESC key.
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If you reflash the wrong firmware or did not reflash successfully, you
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can no longer enter the flash mode, especially the wireless keyboard
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with battery. You need to turn off the keyboard's power switch, and
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re-enter the flash mode, reflash the correct firmware.
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After entering the bootloader(flash mode), three indicators on the top
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right of the HHKB BLE controller will flash. LED3(green) will flash
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quickly when writing firmware to the controller.
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If these three leds are not soldered or your hhkb case is black, you
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can't know their status, but you can still see LED3 under the right
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USB port.
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## How to reliably flash LUFA MassStorage bootloader on Linux
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The FAT filesystem on Linux very often cannot flush the write cache,
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leading to broken firmware in the flash.
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We can use `dd` to write to the virtual block storage directly to
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bypass the vfs layer.
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```
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dd if=FLASH.bin of=<path of virtual block device> seek=4
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```
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Skip 4 sectors because the default sector size of the virtual device
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and dd is 512 bytes and the emulated flash file starts at 5th sector.
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## How to find the path of the virtual block device
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After the keyboard boots into flash mode, on Linux system you should
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be able to find the block device in `dmesg` logs.
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For exmaple if you type
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```
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sudo dmesg
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```
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You should find something like
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```
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[357885.143593] usb 1-1.4: USB disconnect, device number 24
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[357885.627740] usb 1-1.4: new full-speed USB device number 25 using xhci_hcd
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[357885.729486] usb 1-1.4: New USB device found, idVendor=03eb, idProduct=1962, bcdDevice= 0.01
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[357885.729492] usb 1-1.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
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[357885.745620] SCSI subsystem initialized
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[357885.746712] usb-storage 1-1.4:1.0: USB Mass Storage device detected
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[357885.746818] scsi host0: usb-storage 1-1.4:1.0
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[357885.746919] usbcore: registered new interface driver usb-storage
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[357885.747689] usbcore: registered new interface driver uas
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[357886.766755] scsi 0:0:0:0: Direct-Access LUFA Bootloader 0.00 PQ: 0 ANSI: 0
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[357886.773216] scsi 0:0:0:0: Attached scsi generic sg0 type 0
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[357886.777474] sd 0:0:0:0: [sdx] 134 512-byte logical blocks: (68.6 kB/67.0 KiB)
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[357886.780300] sd 0:0:0:0: [sdx] Write Protect is off
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[357886.780302] sd 0:0:0:0: [sdx] Mode Sense: 00 00 00 00
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[357886.783113] sd 0:0:0:0: [sdx] Asking for cache data failed
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[357886.783114] sd 0:0:0:0: [sdx] Assuming drive cache: write through
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[357886.842676] sdx:
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[357886.859528] sd 0:0:0:0: [sdx] Attached SCSI removable disk
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```
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The `sdx` is the block device name and the full path is at `/dev/sdx`
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The above flash command will become
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```
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dd if=FLASH.bin of=/dev/sdx seek=4
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```
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**Caution**: if set to incorrect device it may wipe out
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your actual disk.
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## Help page of original firmware
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http://help.ydkb.io/doku.php?id=en:kb-mods:hhkb-ble
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