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https://github.com/grymoire/i2c_puppet-Linux.git
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68 lines
2.4 KiB
Markdown
68 lines
2.4 KiB
Markdown
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# I2C Puppet mods for Linux systems
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The original version lacked certain characters, such as <ESCAPE>, and the characters "<>{}[]^&%=\"
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which made it difficult to use on Linux systems
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This version of the firmware has been modified to support Linux systems.
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The following changes have been made
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1) The backspace key works during the GUI login
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2) The Sym key not acts as a Control key, so SYM+C is Control-C
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3) The four top button keys are now used to provide the missing characters.
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The original definiton of the keys were this
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L1 L2 R1 R2 SPKR Mic BS NL SPACE
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$ ~ \b \n
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Shift
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Alt 0
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Sym | TAB
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The current definition of the keys are
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L1 L2 R1 R2 SPKR Mic BS NL Spacebar
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<none> <esc> % = \ $ ~ BS \n <space>
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Alt > ] } & ` ~ x <tab>
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Shift < [ { ^ $ ` BS <space>
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Sym x x x x $ ~ BS | <space>
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#Linux Debug tips
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The keyboard was two "outputs" - one is the USB HID interface, the other is the serial port.
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Any printf() command goes to the serial port.
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When the keyboard is plugged into a Linux system, a new TTY interface will appear. I usually use "ls -lt /dev/tty* | head"
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to learn the name, as the newest port will appear first. On my system, it's /dev/ttyACM0
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So on one terminal, I type
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cat -v </dev/ttyACM0
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while on a second terminal window, I type
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cat -v
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The first one will print all of the printf output, and the second will show you how the keyboard works normally.
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#Compiling on Linux
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I edit the files in <GIT>/ic2_puppet/all/ using my preferred editor. In my case, I use emacs. I have the keystroke combination "Control-C M" bound to compile, using
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(global-set-key "\C-cm" 'compile)
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And when I press these keys, emacs saves all files, and recompiles the
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code. I have a small hub with switchable on/off ports, and restart the
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keyboard into boot mode, and then do a "make install" to load the new
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firmware
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#TODO
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Currently - the SYM+Button keys are defined as the character "x" to indicate it's not been specified.
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I'l like to make these keys to the 4 arrow keys.
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Also - it might be possible to create key combinations by combining the modified keys, like SYM+Alt+key
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