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			@ -1,238 +1,238 @@
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## READ FIRST
 | 
			
		||||
- **README** of top directory : https://github.com/tmk/tmk_keyboard/blob/master/README.md
 | 
			
		||||
- **README** of target project(keyboard/converter) directory.
 | 
			
		||||
 | 
			
		||||
Note that you'll need to read **both**.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Build
 | 
			
		||||
- [[FAQ/Build]]
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Keymap
 | 
			
		||||
- [[FAQ/Keymap]]
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Debug Console
 | 
			
		||||
## hid_listen can't recognize device
 | 
			
		||||
When debug console of your device is not ready you will see like this:
 | 
			
		||||
 | 
			
		||||
    Waiting for device:.........
 | 
			
		||||
 | 
			
		||||
once the device is pluged in then *hid_listen* finds it you will get this message:
 | 
			
		||||
 | 
			
		||||
    Waiting for new device:.........................
 | 
			
		||||
    Listening:
 | 
			
		||||
 | 
			
		||||
Check if you can't get this 'Listening:' message:
 | 
			
		||||
- build with `CONSOLE_ENABLE=yes` in **Makefile**.
 | 
			
		||||
 | 
			
		||||
You may need privilege to access the device on OS like Linux.
 | 
			
		||||
- try `sudo hid_listen`
 | 
			
		||||
 | 
			
		||||
## Can't get message on console
 | 
			
		||||
Check:
 | 
			
		||||
- *hid_listen* finds your device. See above.
 | 
			
		||||
- Enable debug with pressing **Magic**+d. See [Magic Commands](https://github.com/tmk/tmk_keyboard#magic-commands).
 | 
			
		||||
- set `debug_enable=true` usually in `matrix_init()` in **matrix.c**.
 | 
			
		||||
- try using 'print' function instead of debug print. See **common/print.h**.
 | 
			
		||||
- disconnect other devices with console function. See [Issue #97](https://github.com/tmk/tmk_keyboard/issues/97).
 | 
			
		||||
 | 
			
		||||
## Linux or UNIX like system requires Super User privilege
 | 
			
		||||
Just use 'sudo' to execute *hid_listen* with privilege.
 | 
			
		||||
```
 | 
			
		||||
$ sudo hid_listen
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
Or add an *udev rule* for TMK devices with placing a file in rules directory. The directory may vary on each system.
 | 
			
		||||
 | 
			
		||||
File: /etc/udev/rules.d/52-tmk-keyboard.rules(in case of Ubuntu)
 | 
			
		||||
```
 | 
			
		||||
# tmk keyboard products     https://github.com/tmk/tmk_keyboard
 | 
			
		||||
SUBSYSTEMS=="usb", ATTRS{idVendor}=="feed", MODE:="0666"
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
***
 | 
			
		||||
 | 
			
		||||
# Miscellaneous
 | 
			
		||||
## NKRO Doesn't work
 | 
			
		||||
First you have to compile frimware with this build option `NKRO_ENABLE` in **Makefile**.
 | 
			
		||||
 | 
			
		||||
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 you need to switch to **6KRO** mode, in particular when you are in BIOS.
 | 
			
		||||
 | 
			
		||||
If your firmeare 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 keeped over power cycles.
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard#boot-magic-configuration---virtual-dip-switch
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## TrackPoint needs reset circuit(PS/2 mouse support)
 | 
			
		||||
Without reset circuit you will have inconsistent reuslt due to improper initialize of the hardware. See circuit schematic of TPM754.
 | 
			
		||||
 | 
			
		||||
- http://geekhack.org/index.php?topic=50176.msg1127447#msg1127447
 | 
			
		||||
- http://www.mikrocontroller.net/attachment/52583/tpm754.pdf
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Can't read column of matrix beyond 16 
 | 
			
		||||
Use `1UL<<16` instead of `1<<16` in `read_cols()` in **matrix.h** when your columns goes beyond 16.
 | 
			
		||||
 | 
			
		||||
In C `1` means one of **int** type which is **16bit** in case of AVR so you can't shift left more than 15. You will get unexpected zero when you say `1<<16`. You have to use **unsigned long** type with `1UL`.
 | 
			
		||||
 | 
			
		||||
http://deskthority.net/workshop-f7/rebuilding-and-redesigning-a-classic-thinkpad-keyboard-t6181-60.html#p146279
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Pull-up Resistor
 | 
			
		||||
In some case converters needed to have pull-up resistors to work correctly. Place the resistor between VCC and signal line in parallel.
 | 
			
		||||
 | 
			
		||||
For example:
 | 
			
		||||
```
 | 
			
		||||
Keyboard       Conveter
 | 
			
		||||
               ,------.
 | 
			
		||||
5V------+------|VCC   |
 | 
			
		||||
        |      |      |
 | 
			
		||||
        R      |      |
 | 
			
		||||
        |      |      |
 | 
			
		||||
Signal--+------|PD0   |
 | 
			
		||||
               |      |
 | 
			
		||||
GND------------|GND   |
 | 
			
		||||
               `------'
 | 
			
		||||
R: 1K Ohm resistor
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/71
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Arduino Micro's pin naming is confusing
 | 
			
		||||
Note that Arduino Micro PCB marking is different from real AVR port name. D0 of Arduino Micro is not PD0, PD0 is D3. Check schematic yourself.
 | 
			
		||||
http://arduino.cc/en/uploads/Main/arduino-micro-schematic.pdf
 | 
			
		||||
 | 
			
		||||
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		||||
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		||||
## Bootloader jump doesn't work
 | 
			
		||||
Properly configure bootloader size in **Makefile**. With wrong section size bootloader won't probably start with **Magic command** and **Boot Magic**.
 | 
			
		||||
```
 | 
			
		||||
# Size of Bootloaders in bytes:
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#   Atmel DFU loader(ATmega32U4)   4096    
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		||||
#   Atmel DFU loader(AT90USB128)   8192    
 | 
			
		||||
#   LUFA bootloader(ATmega32U4)    4096             
 | 
			
		||||
#   Arduino Caterina(ATmega32U4)   4096             
 | 
			
		||||
#   USBaspLoader(ATmega***)        2048             
 | 
			
		||||
#   Teensy   halfKay(ATmega32U4)   512              
 | 
			
		||||
#   Teensy++ halfKay(AT90USB128)   2048
 | 
			
		||||
OPT_DEFS += -DBOOTLOADER_SIZE=4096
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```
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		||||
AVR Boot section size are defined by setting **BOOTSZ** fuse in fact. Consult with your MCU datasheet.
 | 
			
		||||
Note that **Word**(2 bytes) size and address are used in datasheet while TMK uses **Byte**.
 | 
			
		||||
 | 
			
		||||
AVR Boot section is located at end of Flash memory like the followings.
 | 
			
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```
 | 
			
		||||
byte     Atmel/LUFA(ATMega32u4)          byte     Atmel(AT90SUB1286)
 | 
			
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0x0000   +---------------+               0x00000  +---------------+
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         |               |                        |               |
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		||||
         |               |                        |               |
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         |  Application  |                        |  Application  |
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		||||
         |               |                        |               | 
 | 
			
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         =               =                        =               =
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		||||
         |               | 32KB-4KB               |               | 128KB-8KB
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		||||
0x6000   +---------------+               0x1E000  +---------------+
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		||||
         |  Bootloader   | 4KB                    |  Bootloader   | 8KB
 | 
			
		||||
0x7FFF   +---------------+               0x1FFFF  +---------------+
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		||||
 | 
			
		||||
 
 | 
			
		||||
byte     Teensy(ATMega32u4)              byte     Teensy++(AT90SUB1286)
 | 
			
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0x0000   +---------------+               0x00000  +---------------+
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |  Application  |                        |  Application  |
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         =               =                        =               =
 | 
			
		||||
         |               | 32KB-512B              |               | 128KB-2KB
 | 
			
		||||
0x7E00   +---------------+               0x1FC00  +---------------+
 | 
			
		||||
         |  Bootloader   | 512B                   |  Bootloader   | 2KB
 | 
			
		||||
0x7FFF   +---------------+               0x1FFFF  +---------------+
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
And see this discussion for further reference.
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/179
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Special Extra key doesn't work(System, Audio control keys)
 | 
			
		||||
You need to define `EXTRAKEY_ENABLE` in **makefile** to use them in TMK.
 | 
			
		||||
```
 | 
			
		||||
EXTRAKEY_ENABLE = yes          # Audio control and System control
 | 
			
		||||
```
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		||||
http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-60.html#p157919
 | 
			
		||||
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		||||
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		||||
## Wakeup from sleep doesn't work
 | 
			
		||||
In Windows check `Allow this device to wake the computer` setting in Power **Management property** tab of **Device Manager**. Also check BIOS setting.
 | 
			
		||||
 | 
			
		||||
Pressing any key during sleep should wake host.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Using Arduino?
 | 
			
		||||
**Note that Arduino pin naming is different from actual chip.** For example, Arduino pin `D0` is not `PD0`. Check circuit with its schematics yourself.
 | 
			
		||||
 | 
			
		||||
- http://arduino.cc/en/uploads/Main/arduino-leonardo-schematic_3b.pdf
 | 
			
		||||
- http://arduino.cc/en/uploads/Main/arduino-micro-schematic.pdf
 | 
			
		||||
 | 
			
		||||
Arduino leonardo and micro have **ATMega32U4** and can be used for TMK, though Arduino bootloader may be a problem.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Using PF4-7 pins of USB AVR?
 | 
			
		||||
You need to set JTD bit of MCUCR yourself to use PF4-7 as GPIO. Those pins are configured to serve JTAG function by default. MCUs like ATMega*U* or AT90USB* are affeteced with this.
 | 
			
		||||
 | 
			
		||||
If you are using Teensy this isn't needed. Teensy is shipped with JTAGEN fuse bit unprogrammed to disable the function.
 | 
			
		||||
 | 
			
		||||
See this code.
 | 
			
		||||
```
 | 
			
		||||
    // JTAG disable for PORT F. write JTD bit twice within four cycles.
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		||||
    MCUCR |= (1<<JTD);
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		||||
    MCUCR |= (1<<JTD);
 | 
			
		||||
```
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/blob/master/keyboard/hbkb/matrix.c#L67
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		||||
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		||||
And read **26.5.1 MCU Control Register – MCUCR** of ATMega32U4 datasheet.
 | 
			
		||||
 | 
			
		||||
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		||||
## Adding LED indicators of Lock keys
 | 
			
		||||
You need your own LED indicators for CapsLock, ScrollLock and NumLock? See this post.
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		||||
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		||||
http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-120.html#p191560
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		||||
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		||||
## Program Arduino Micro/Leonardo
 | 
			
		||||
Push reset button and then run command like this within 8 seconds.
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		||||
 | 
			
		||||
```
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		||||
avrdude -patmega32u4 -cavr109 -b57600 -Uflash:w:adb_usb.hex -P/dev/ttyACM0
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		||||
```
 | 
			
		||||
 | 
			
		||||
Device name will vary depending on your system.
 | 
			
		||||
 | 
			
		||||
http://arduino.cc/en/Main/ArduinoBoardMicro
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		||||
https://geekhack.org/index.php?topic=14290.msg1563867#msg1563867
 | 
			
		||||
 | 
			
		||||
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## USB 3 compatibility
 | 
			
		||||
I heard some people have a problem with USB 3 port, try USB 2 port.
 | 
			
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 | 
			
		||||
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		||||
## Mac compatibility
 | 
			
		||||
### OS X 10.11 and Hub
 | 
			
		||||
https://geekhack.org/index.php?topic=14290.msg1884034#msg1884034
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Problem on BIOS(UEFI)/Resume(Sleep&Wake)/Power cycles
 | 
			
		||||
Some people reported their keyboard stops working on BIOS and/or after resume(power cycles).
 | 
			
		||||
 | 
			
		||||
As of now root of its cause is not clear but some build options seem to be related. In Makefile try to disable those options like `CONSOLE_ENABLE`, `NKRO_ENABLE`, `SLEEP_LED_ENABLE` and/or others. 
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/266
 | 
			
		||||
https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## FLIP doesn't work
 | 
			
		||||
### AtLibUsbDfu.dll not found
 | 
			
		||||
Remove current driver and reinstall one FLIP provides from DeviceManager.
 | 
			
		||||
## READ FIRST
 | 
			
		||||
- **README** of top directory : https://github.com/tmk/tmk_keyboard/blob/master/README.md
 | 
			
		||||
- **README** of target project(keyboard/converter) directory.
 | 
			
		||||
 | 
			
		||||
Note that you'll need to read **both**.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Build
 | 
			
		||||
- [[FAQ/Build]]
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Keymap
 | 
			
		||||
- [[FAQ/Keymap]]
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
# Debug Console
 | 
			
		||||
## hid_listen can't recognize device
 | 
			
		||||
When debug console of your device is not ready you will see like this:
 | 
			
		||||
 | 
			
		||||
    Waiting for device:.........
 | 
			
		||||
 | 
			
		||||
once the device is pluged in then *hid_listen* finds it you will get this message:
 | 
			
		||||
 | 
			
		||||
    Waiting for new device:.........................
 | 
			
		||||
    Listening:
 | 
			
		||||
 | 
			
		||||
Check if you can't get this 'Listening:' message:
 | 
			
		||||
- build with `CONSOLE_ENABLE=yes` in **Makefile**.
 | 
			
		||||
 | 
			
		||||
You may need privilege to access the device on OS like Linux.
 | 
			
		||||
- try `sudo hid_listen`
 | 
			
		||||
 | 
			
		||||
## Can't get message on console
 | 
			
		||||
Check:
 | 
			
		||||
- *hid_listen* finds your device. See above.
 | 
			
		||||
- Enable debug with pressing **Magic**+d. See [Magic Commands](https://github.com/tmk/tmk_keyboard#magic-commands).
 | 
			
		||||
- set `debug_enable=true` usually in `matrix_init()` in **matrix.c**.
 | 
			
		||||
- try using 'print' function instead of debug print. See **common/print.h**.
 | 
			
		||||
- disconnect other devices with console function. See [Issue #97](https://github.com/tmk/tmk_keyboard/issues/97).
 | 
			
		||||
 | 
			
		||||
## Linux or UNIX like system requires Super User privilege
 | 
			
		||||
Just use 'sudo' to execute *hid_listen* with privilege.
 | 
			
		||||
```
 | 
			
		||||
$ sudo hid_listen
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
Or add an *udev rule* for TMK devices with placing a file in rules directory. The directory may vary on each system.
 | 
			
		||||
 | 
			
		||||
File: /etc/udev/rules.d/52-tmk-keyboard.rules(in case of Ubuntu)
 | 
			
		||||
```
 | 
			
		||||
# tmk keyboard products     https://github.com/tmk/tmk_keyboard
 | 
			
		||||
SUBSYSTEMS=="usb", ATTRS{idVendor}=="feed", MODE:="0666"
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
***
 | 
			
		||||
 | 
			
		||||
# Miscellaneous
 | 
			
		||||
## NKRO Doesn't work
 | 
			
		||||
First you have to compile frimware with this build option `NKRO_ENABLE` in **Makefile**.
 | 
			
		||||
 | 
			
		||||
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 you need to switch to **6KRO** mode, in particular when you are in BIOS.
 | 
			
		||||
 | 
			
		||||
If your firmeare 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 keeped over power cycles.
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard#boot-magic-configuration---virtual-dip-switch
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## TrackPoint needs reset circuit(PS/2 mouse support)
 | 
			
		||||
Without reset circuit you will have inconsistent reuslt due to improper initialize of the hardware. See circuit schematic of TPM754.
 | 
			
		||||
 | 
			
		||||
- http://geekhack.org/index.php?topic=50176.msg1127447#msg1127447
 | 
			
		||||
- http://www.mikrocontroller.net/attachment/52583/tpm754.pdf
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Can't read column of matrix beyond 16 
 | 
			
		||||
Use `1UL<<16` instead of `1<<16` in `read_cols()` in **matrix.h** when your columns goes beyond 16.
 | 
			
		||||
 | 
			
		||||
In C `1` means one of **int** type which is **16bit** in case of AVR so you can't shift left more than 15. You will get unexpected zero when you say `1<<16`. You have to use **unsigned long** type with `1UL`.
 | 
			
		||||
 | 
			
		||||
http://deskthority.net/workshop-f7/rebuilding-and-redesigning-a-classic-thinkpad-keyboard-t6181-60.html#p146279
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Pull-up Resistor
 | 
			
		||||
In some case converters needed to have pull-up resistors to work correctly. Place the resistor between VCC and signal line in parallel.
 | 
			
		||||
 | 
			
		||||
For example:
 | 
			
		||||
```
 | 
			
		||||
Keyboard       Conveter
 | 
			
		||||
               ,------.
 | 
			
		||||
5V------+------|VCC   |
 | 
			
		||||
        |      |      |
 | 
			
		||||
        R      |      |
 | 
			
		||||
        |      |      |
 | 
			
		||||
Signal--+------|PD0   |
 | 
			
		||||
               |      |
 | 
			
		||||
GND------------|GND   |
 | 
			
		||||
               `------'
 | 
			
		||||
R: 1K Ohm resistor
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/71
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Arduino Micro's pin naming is confusing
 | 
			
		||||
Note that Arduino Micro PCB marking is different from real AVR port name. D0 of Arduino Micro is not PD0, PD0 is D3. Check schematic yourself.
 | 
			
		||||
http://arduino.cc/en/uploads/Main/arduino-micro-schematic.pdf
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Bootloader jump doesn't work
 | 
			
		||||
Properly configure bootloader size in **Makefile**. With wrong section size bootloader won't probably start with **Magic command** and **Boot Magic**.
 | 
			
		||||
```
 | 
			
		||||
# Size of Bootloaders in bytes:
 | 
			
		||||
#   Atmel DFU loader(ATmega32U4)   4096    
 | 
			
		||||
#   Atmel DFU loader(AT90USB128)   8192    
 | 
			
		||||
#   LUFA bootloader(ATmega32U4)    4096             
 | 
			
		||||
#   Arduino Caterina(ATmega32U4)   4096             
 | 
			
		||||
#   USBaspLoader(ATmega***)        2048             
 | 
			
		||||
#   Teensy   halfKay(ATmega32U4)   512              
 | 
			
		||||
#   Teensy++ halfKay(AT90USB128)   2048
 | 
			
		||||
OPT_DEFS += -DBOOTLOADER_SIZE=4096
 | 
			
		||||
```
 | 
			
		||||
AVR Boot section size are defined by setting **BOOTSZ** fuse in fact. Consult with your MCU datasheet.
 | 
			
		||||
Note that **Word**(2 bytes) size and address are used in datasheet while TMK uses **Byte**.
 | 
			
		||||
 | 
			
		||||
AVR Boot section is located at end of Flash memory like the followings.
 | 
			
		||||
```
 | 
			
		||||
byte     Atmel/LUFA(ATMega32u4)          byte     Atmel(AT90SUB1286)
 | 
			
		||||
0x0000   +---------------+               0x00000  +---------------+
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |  Application  |                        |  Application  |
 | 
			
		||||
         |               |                        |               | 
 | 
			
		||||
         =               =                        =               =
 | 
			
		||||
         |               | 32KB-4KB               |               | 128KB-8KB
 | 
			
		||||
0x6000   +---------------+               0x1E000  +---------------+
 | 
			
		||||
         |  Bootloader   | 4KB                    |  Bootloader   | 8KB
 | 
			
		||||
0x7FFF   +---------------+               0x1FFFF  +---------------+
 | 
			
		||||
 | 
			
		||||
 
 | 
			
		||||
byte     Teensy(ATMega32u4)              byte     Teensy++(AT90SUB1286)
 | 
			
		||||
0x0000   +---------------+               0x00000  +---------------+
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         |  Application  |                        |  Application  |
 | 
			
		||||
         |               |                        |               |
 | 
			
		||||
         =               =                        =               =
 | 
			
		||||
         |               | 32KB-512B              |               | 128KB-2KB
 | 
			
		||||
0x7E00   +---------------+               0x1FC00  +---------------+
 | 
			
		||||
         |  Bootloader   | 512B                   |  Bootloader   | 2KB
 | 
			
		||||
0x7FFF   +---------------+               0x1FFFF  +---------------+
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
And see this discussion for further reference.
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/179
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Special Extra key doesn't work(System, Audio control keys)
 | 
			
		||||
You need to define `EXTRAKEY_ENABLE` in **makefile** to use them in TMK.
 | 
			
		||||
```
 | 
			
		||||
EXTRAKEY_ENABLE = yes          # Audio control and System control
 | 
			
		||||
```
 | 
			
		||||
http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-60.html#p157919
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Wakeup from sleep doesn't work
 | 
			
		||||
In Windows check `Allow this device to wake the computer` setting in Power **Management property** tab of **Device Manager**. Also check BIOS setting.
 | 
			
		||||
 | 
			
		||||
Pressing any key during sleep should wake host.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Using Arduino?
 | 
			
		||||
**Note that Arduino pin naming is different from actual chip.** For example, Arduino pin `D0` is not `PD0`. Check circuit with its schematics yourself.
 | 
			
		||||
 | 
			
		||||
- http://arduino.cc/en/uploads/Main/arduino-leonardo-schematic_3b.pdf
 | 
			
		||||
- http://arduino.cc/en/uploads/Main/arduino-micro-schematic.pdf
 | 
			
		||||
 | 
			
		||||
Arduino leonardo and micro have **ATMega32U4** and can be used for TMK, though Arduino bootloader may be a problem.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Using PF4-7 pins of USB AVR?
 | 
			
		||||
You need to set JTD bit of MCUCR yourself to use PF4-7 as GPIO. Those pins are configured to serve JTAG function by default. MCUs like ATMega*U* or AT90USB* are affeteced with this.
 | 
			
		||||
 | 
			
		||||
If you are using Teensy this isn't needed. Teensy is shipped with JTAGEN fuse bit unprogrammed to disable the function.
 | 
			
		||||
 | 
			
		||||
See this code.
 | 
			
		||||
```
 | 
			
		||||
    // JTAG disable for PORT F. write JTD bit twice within four cycles.
 | 
			
		||||
    MCUCR |= (1<<JTD);
 | 
			
		||||
    MCUCR |= (1<<JTD);
 | 
			
		||||
```
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/blob/master/keyboard/hbkb/matrix.c#L67
 | 
			
		||||
 | 
			
		||||
And read **26.5.1 MCU Control Register – MCUCR** of ATMega32U4 datasheet.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Adding LED indicators of Lock keys
 | 
			
		||||
You need your own LED indicators for CapsLock, ScrollLock and NumLock? See this post.
 | 
			
		||||
 | 
			
		||||
http://deskthority.net/workshop-f7/tmk-keyboard-firmware-collection-t4478-120.html#p191560
 | 
			
		||||
 | 
			
		||||
## Program Arduino Micro/Leonardo
 | 
			
		||||
Push reset button and then run command like this within 8 seconds.
 | 
			
		||||
 | 
			
		||||
```
 | 
			
		||||
avrdude -patmega32u4 -cavr109 -b57600 -Uflash:w:adb_usb.hex -P/dev/ttyACM0
 | 
			
		||||
```
 | 
			
		||||
 | 
			
		||||
Device name will vary depending on your system.
 | 
			
		||||
 | 
			
		||||
http://arduino.cc/en/Main/ArduinoBoardMicro
 | 
			
		||||
https://geekhack.org/index.php?topic=14290.msg1563867#msg1563867
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## USB 3 compatibility
 | 
			
		||||
I heard some people have a problem with USB 3 port, try USB 2 port.
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Mac compatibility
 | 
			
		||||
### OS X 10.11 and Hub
 | 
			
		||||
https://geekhack.org/index.php?topic=14290.msg1884034#msg1884034
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## Problem on BIOS(UEFI)/Resume(Sleep&Wake)/Power cycles
 | 
			
		||||
Some people reported their keyboard stops working on BIOS and/or after resume(power cycles).
 | 
			
		||||
 | 
			
		||||
As of now root of its cause is not clear but some build options seem to be related. In Makefile try to disable those options like `CONSOLE_ENABLE`, `NKRO_ENABLE`, `SLEEP_LED_ENABLE` and/or others. 
 | 
			
		||||
 | 
			
		||||
https://github.com/tmk/tmk_keyboard/issues/266
 | 
			
		||||
https://geekhack.org/index.php?topic=41989.msg1967778#msg1967778
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
 | 
			
		||||
## FLIP doesn't work
 | 
			
		||||
### AtLibUsbDfu.dll not found
 | 
			
		||||
Remove current driver and reinstall one FLIP provides from DeviceManager.
 | 
			
		||||
http://imgur.com/a/bnwzy
 | 
			
		||||
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