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https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter
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68 lines
2.7 KiB
Markdown
68 lines
2.7 KiB
Markdown
# Poor man's "Keyrah" to connect C64 keyboard to USB (for BMC64 emulator)
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## Building
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- Solder all keyboard connector pins to Arduino Pro Micro.
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- You can solder Restore key (connector pin "I") paraller to some other pin. I soldered "I" and "G" to Arduino pin A8. (this is actually not needed, because there is one free pin left)
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- You can also connect LED of C64 to VCC/GND of Arduino. I used 220ohm resistor.
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## Firmware/flashing
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- Download Soarer controller firmware: https://geekhack.org/index.php?topic=50437.0
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- Install Arduino IDE
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- Connect RST to GND couple of times to get Arduino Pro Micro to programming mode (notice that com-port is different in programming mode in Windows)
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- Flash firmware
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```
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& "C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude" -C"C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -p m32u4 -c avr109 -P COM5 -b 57600 -U flash:w:firmware\Soarer_Controller_v1.20_beta4_atmega32u4.hex:i
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```
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## Setup
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- Download configfile. Check pin order to match your setup.
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- Compile and upload config file to Arduino Pro Micro
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```
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.\scas C64_matrix.sc C64_matrix.bin
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.\scwr C64_matrix.bin
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```
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## Testing
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- https://keycode.info/
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## Pins I used
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```
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//KeyBoard Arduino Pro Micro
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// Pin Pin Label GPIO pin (kirjaimet = columns (rivit), numerot = rows (otsikot))
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// 20 5 2 - SDA PD1 A
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// 19 6 3 - SCL PD0 B
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// 18 7 4 - A6 PD4 C
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// 17 8 5 PC6 D
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// 16 9 6 - A7 PD7 E
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// 15 10 7 - PE6 F
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// 14 11 8 - A8 PB4 G
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// 13 12 9 - A9 PB5 H
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// 12 13 10 - A10 PB6 0
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// 11 14 16 - MOSI PB2 1
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// 10 15 14 - MISO PB3 2
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// 9 16 15 - SCLK PB1 3
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// 8 17 18 - A0 PF7 4
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// 7 18 19 - A1 PF6 5
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// 6 19 20 - A2 PF5 6
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// 5 20 21 - A3 PF4 7
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// 4 N/C
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// 3 1 1 - TX PD3 8
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// 2 N/C
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// 1 11 8 - A8 PB4 I
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```
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## Issue
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- "+", "-", "£", "@" and "*" doesn't produce GFX-chars when shifted
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## Links
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- https://geekhack.org/index.php?topic=50437.0
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- https://deskthority.net/workshop-f7/soarer-s-keyboard-controller-firmware-t6767.html
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- Soarer_Controller_v1.20_beta4.zip (26.10.2013)
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- https://www.waitingforfriday.com/wp-content/uploads/2017/01/C64_Keyboard_Schematics_PNG.png
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- http://kookye.com/wp-content/uploads/2016/02/Pinout-ProMicro.jpg
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- I used this as starting point: https://github.com/abzman/Keyboard-config-file/blob/master/C64_matrix.sc
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- C64-emulator for Raspberry Pi 2/3: http://accentual.com/bmc64/
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