STM32 HID device for arcade builds
Compound HID device containing keyboard, mouse, two joysticks and a virtual com port. Plug into a retropie or something and wire cool buttons and joysticks and whatnot.
See /cad - here you'll find a reference design with 26 pins for an STM32F1 128kB flash variant. Any STM32F1 board would do, as long as pin-headers are broken out.
Each pin can be configured with combinations of a keyboard keypress, mouse movement or click, or joystick movement or button press.
Every pin can hold up to eight different combinations. There is also ternary support meaning a pin's config can change depending on if another pin is active or not.
Accelerators for mouse and joystick are supported.
Everything is configured in the command line interface, either via UART pins or via virtual com port.
Different configurations can be saved and loaded, using the internal flash of the STM32F1 (128 kb variant) - no extra storage chip needed.
Depends on pellepl/generic_embedded and pellepl/niffs.
Now also with the Annoyatron support, drive your friends mad...
// define pin 1 to send keyboard character A
def pin1 = a
// define pin 2 to move mouse up
def pin2 = mouse_y(-1)
// define pin 3 to move mouse right if pin 4 is pressed else left
def pin3 = pin4 ? mouse_x(1) : mouse_x(-1)
// define pin 5 to send keyboard sequence CTRL+ALT+DEL
def pin5 = LEFT_CTRL LEFT_ALT DELETE
For certain definitions, numerators are possible. A numerators normally tells how much to move something, e.g. a mouse or joystick. In addition, all numerators can have accelerators, meaning the control will move more and more over time.
A numerator <num> is defined as (ACC)[(+)|-][1..127].
// move joystick 10 steps right on x axis
def pin7 = joy1_x(10)
// move joystick accelerating from 1 to 10 steps right on x axis
def pin8 = joy1_x(ACC10)
// and left
def pin8 = joy1_x(ACC-10)
Accelerator speed is controlled by cli commands
set_mouse_pos_acc
set_mouse_wheel_acc
set_joy_acc
Following is a list of all definitions possible.
KEYBOARD SYMBOLS:
A B C D
E F G H
I J K L
M N O P
Q R S T
U V W X
Y Z 1 2
3 4 5 6
7 8 9 0
ENTER ESCAPE BACKSPACE TAB
SPACE MINUS EQUAL LEFTBRACKET
RIGHTBRACKET BACKSLASH NONUS_HASH SEMICOLON
QUOTE GRAVE COMMA DOT
SLASH CAPSLOCK F1 F2
F3 F4 F5 F6
F7 F8 F9 F10
F11 F12 PRINTSCREEN SCROLLLOCK
PAUSE INSERT HOME PGUP
DELETE END PGDOWN RIGHT
LEFT DOWN UP NUMLOCK
KP_SLASH KP_ASTERISK KP_MINUS KP_PLUS
KP_ENTER KP_1 KP_2 KP_3
KP_4 KP_5 KP_6 KP_7
KP_8 KP_9 KP_0 KP_DOT
NONUS_BACKSLASH APPLICATION POWER KP_EQUAL
F13 F14 F15 F16
F17 F18 F19 F20
F21 F22 F23 F24
EXECUTE HELP MENU SELECT
STOP AGAIN UNDO CUT
COPY PASTE FIND MUTE
VOLUME_UP VOLUME_DOWN LOCKING_CAPS LOCKING_NUM
LOCKING_SCROLL KP_COMMA KP_EQUAL_AS400 INT1
INT2 INT3 INT4 INT5
INT6 INT7 INT8 INT9
LANG1 LANG2 LANG3 LANG4
LANG5 LANG6 LANG7 LANG8
LANG9 ALT_ERASE SYSREQ CANCEL
CLEAR PRIOR RETURN SEPARATOR
OUT OPER CLEAR_AGAIN CRSEL
EXSEL SYSTEM_POWER SYSTEM_SLEEP SYSTEM_WAKE
AUDIO_MUTE AUDIO_VOL_UP AUDIO_VOL_DOWN MEDIA_NEXT_TRACK
MEDIA_PREV_TRACK MEDIA_STOP MEDIA_PLAY_PAUSE MEDIA_SELECT
MEDIA_EJECT MAIL CALCULATOR MY_COMPUTER
WWW_SEARCH WWW_HOME WWW_BACK WWW_FORWARD
WWW_STOP WWW_REFRESH WWW_FAVORITES MEDIA_FAST_FORWARD
MEDIA_REWIND LEFT_CTRL LEFT_SHIFT LEFT_ALT
LEFT_GUI RIGHT_CTRL RIGHT_SHIFT RIGHT_ALT
RIGHT_GUI
MOUSE SYMBOLS:
MOUSE_X(<num>) MOUSE_Y(<num>) MOUSE_BUTTON1 MOUSE_BUTTON2
MOUSE_BUTTON3 MOUSE_WHEEL(<num>)
JOYSTICK SYMBOLS:
JOY1_X(<num>) JOY1_Y(<num>) JOY1_BUTTON1 JOY1_BUTTON2
JOY1_BUTTON3 JOY1_BUTTON4 JOY1_BUTTON5 JOY1_BUTTON6
JOY1_BUTTON7 JOY1_BUTTON8 JOY1_BUTTON9 JOY1_BUTTON10
JOY1_BUTTON11 JOY1_BUTTON12 JOY1_BUTTON13 JOY1_BUTTON14
JOY2_X(<num>) JOY2_Y(<num>) JOY2_BUTTON1 JOY2_BUTTON2
JOY2_BUTTON3 JOY2_BUTTON4 JOY2_BUTTON5 JOY2_BUTTON6
JOY2_BUTTON7 JOY2_BUTTON8 JOY2_BUTTON9 JOY2_BUTTON10
JOY2_BUTTON11 JOY2_BUTTON12 JOY2_BUTTON13 JOY2_BUTTON14
Make sure you clone submodules.
human-entity@machine ~$ git clone --recursive https://github.com/pellepl/arcadehid
You'll need an arm toolchain, let's say it lies in /home/human-entity/toolchain/arm-none-eabi-toolchain-gcc-6.3.0.
Then you simply do this:
human-entity@machine ~$ cd arcadehid
human-entity@machine ~/arcadehid$ make clean
human-entity@machine ~/arcadehid$ CROSS_COMPILE=/home/human-entity/toolchain/arm-none-eabi-toolchain-gcc-6.3.0/bin/arm-none-eabi- make all
Alternatively. you tinker a bit with the makefile.
This will produce target files in elf, binary, and ihex flavours in the build folder. Flash using your favourite dongle and tool. I use OpenOCD, there are some scripts in the repo which might be helpful to others.