118 lines
5.4 KiB
Markdown
118 lines
5.4 KiB
Markdown
# Miscellaneous FAQ
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## How do I test my keyboard? :id=testing
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Testing your keyboard is usually pretty straightforward. Press every single key and make sure it sends the keys you expect. You can use [QMK Configurator](https://config.qmk.fm/#/test/)'s test mode to check your keyboard, even if it doesn't run QMK.
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## Safety Considerations
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You probably don't want to "brick" your keyboard, making it impossible
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to rewrite firmware onto it. Here are some of the parameters to show
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what things are (and likely aren't) too risky.
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- If your keyboard map does not include RESET, then, to get into DFU
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mode, you will need to press the reset button on the PCB, which
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requires unscrewing the bottom.
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- Messing with tmk_core / common files might make the keyboard
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inoperable
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- Too large a .hex file is trouble; `make dfu` will erase the block,
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test the size (oops, wrong order!), which errors out, failing to
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flash the keyboard, leaving it in DFU mode.
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- To this end, note that the maximum .hex file size on e.g. Planck
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is 7000h (28672 decimal)
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```
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Linking: .build/planck_rev4_cbbrowne.elf [OK]
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Creating load file for Flash: .build/planck_rev4_cbbrowne.hex [OK]
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Size after:
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text data bss dec hex filename
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0 22396 0 22396 577c planck_rev4_cbbrowne.hex
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```
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- The above file is of size 22396/577ch, which is less than
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28672/7000h
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- As long as you have a suitable alternative .hex file around, you
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can retry, loading that one
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- Some of the options you might specify in your keyboard's Makefile
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consume extra memory; watch out for BOOTMAGIC_ENABLE,
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MOUSEKEY_ENABLE, EXTRAKEY_ENABLE, CONSOLE_ENABLE, API_SYSEX_ENABLE
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- DFU tools do /not/ allow you to write into the bootloader (unless
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you throw in an extra fruit salad of options), so there is little risk
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there.
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- EEPROM has around a 100000 (100k) write cycle. You shouldn't rewrite
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the firmware repeatedly and continually; that'll burn the EEPROM
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eventually.
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## NKRO Doesn't work
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First you have to compile firmware with the build option `NKRO_ENABLE` in **Makefile**.
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Try `Magic` **N** command(`LShift+RShift+N` by default) when **NKRO** still doesn't work. You can use this command to toggle between **NKRO** and **6KRO** mode temporarily. In some situations **NKRO** doesn't work and you will need to switch to **6KRO** mode, in particular when you are in BIOS.
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If your firmware was built with `BOOTMAGIC_ENABLE` you need to turn its switch on by `BootMagic` **N** command(`Space+N` by default). This setting is stored in EEPROM and kept over power cycles.
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https://github.com/tmk/tmk_keyboard#boot-magic-configuration---virtual-dip-switch
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## TrackPoint Needs Reset Circuit (PS/2 Mouse Support)
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Without reset circuit you will have inconsistent result due to improper initialization of the hardware. See circuit schematic of TPM754:
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- https://geekhack.org/index.php?topic=50176.msg1127447#msg1127447
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- https://www.mikrocontroller.net/attachment/52583/tpm754.pdf
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## Can't Read Column of Matrix Beyond 16
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Use `1UL<<16` instead of `1<<16` in `read_cols()` in [matrix.h] when your columns goes beyond 16.
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In C `1` means one of [int] type which is [16 bit] in case of AVR, so you can't shift left more than 15. Thus, calculating `1<<16` will unexpectedly equal zero. To work around this, you have to use [unsigned long] type with `1UL`.
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https://deskthority.net/workshop-f7/rebuilding-and-redesigning-a-classic-thinkpad-keyboard-t6181-60.html#p146279
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## Special Extra Key Doesn't Work (System, Audio Control Keys)
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You need to define `EXTRAKEY_ENABLE` in `rules.mk` to use them in QMK.
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```
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EXTRAKEY_ENABLE = yes # Audio control and System control
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```
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## Wake from Sleep Doesn't Work
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In Windows check `Allow this device to wake the computer` setting in **Power Management** property tab of **Device Manager**. Also check your BIOS settings. Pressing any key during sleep should wake host.
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## Using Arduino?
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**Note that Arduino pin naming is different from actual chip.** For example, Arduino pin `D0` is not `PD0`. Check circuit with its schematics yourself.
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- https://arduino.cc/en/uploads/Main/arduino-leonardo-schematic_3b.pdf
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- https://arduino.cc/en/uploads/Main/arduino-micro-schematic.pdf
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Arduino Leonardo and micro have **ATMega32U4** and can be used for TMK, though Arduino bootloader may be a problem.
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## Enabling JTAG
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By default, the JTAG debugging interface is disabled as soon as the keyboard starts up. JTAG-capable MCUs come from the factory with the `JTAGEN` fuse set, and it takes over certain pins of the MCU that the board may be using for the switch matrix, LEDs, etc.
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If you would like to keep JTAG enabled, just add the following to your `config.h`:
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```c
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#define NO_JTAG_DISABLE
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```
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## USB 3 Compatibility
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Some problems can be fixed by switching from a USB 3.x port to a USB 2.0 port.
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## Mac Compatibility
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### OS X 10.11 and Hub
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See here: https://geekhack.org/index.php?topic=14290.msg1884034#msg1884034
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## Problem in BIOS (UEFI) Setup/Resume (Sleep & Wake)/Power Cycles
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Some people reported their keyboard stops working in BIOS and/or after resume(power cycles).
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As of now the root cause is not clear, but some build options seem to be related. In Makefile, try to disable options like `CONSOLE_ENABLE`, `NKRO_ENABLE`, `SLEEP_LED_ENABLE` and/or others.
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More info:
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- https://github.com/tmk/tmk_keyboard/issues/266
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- https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778
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