mirror of
https://github.com/MiSTer-devel/CDi_MiSTer.git
synced 2026-06-14 03:04:32 +00:00
d05f1fb295
- Added servo controller SPI fake communication Behaves as a closed but empty tray - Added pointing device emulation MiSTer joystick data used as input Behaves like a maneuvering device - Added SCI IRQ to 6805 cpu core - Added SPI and SCI to 6805 uC - Fixed spurious 68k chip select for slave - Added documentation about I2C to the Front LCD - Simulated U3090MG no longer causes front panel button presses Lead to spurious IRQs before - Removal of slave memory patches
92 lines
1.7 KiB
Markdown
92 lines
1.7 KiB
Markdown
# Input Device
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## Sources
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https://www.theworldofcdi.com/open-source/hardware-development/the-cd-i-controller-interface/
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https://www.theworldofcdi.com/open-source/hardware-development/cd-i-gamepad-adapter/
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https://github.com/anarterb/SNEStoCDi/blob/master/sketchSNEStoCDi.ino
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Communication starts with device sending 0b11001010 to CD-i player.
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Afterwards a frame of 3 is transmitted
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Idle state:
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0= 0b11000000
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1= 0b10000000
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2= 0b10000000
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## Data format
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* Protocol for Maneuvering Device
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Only 7 bits. The 8th bit is always 1.
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Byte 0 -> 1 1 B1 B2 Y7 Y6 X7 X6
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Byte 1 -> 1 0 X5 X4 X3 X2 X1 X0
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Byte 2 -> 1 0 Y5 Y4 Y3 Y2 Y1 Y0
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## Spoon
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Baud rate is 1200
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Spoon Start
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CA C0 80 80 This is Manuvering Device + No button Press
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CA FF ??
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FE ??
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CA C0 80 80 This is Manuvering Device + No button Press
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Spoon D-Pad Left
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C3 BE 80 Permanently
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C3 B8 80 After a while
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Spoon D-Pad Right
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C0 82 80 Permanently
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C0 88 80 After a while
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Spoon D-Pad Up
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CC 80 BE Permanently
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Spoon D-Pad Down
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C0 80 82 Permanently
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Spoon Left Press
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E0 80 80 Transmitted once
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Spoon Left Release
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C0 80 80 Transmitted once
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Spoon Right Press
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D0 80 80 Transmitted once
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Spoon Right Release
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C0 80 80 Transmitted once
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This means:
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The right button is B2.
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The left button is B1.
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The speed increments over time
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It starts with 2 and changes to 8.
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The relativ coordinates are two's complement.
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Pressing left is negative X.
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Pressing right is positive X.
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Pressing up is negative Y.
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Pressing down is positve Y.
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When the D-Pad is pressed, the Spoon will send permanently. Button presses cause transmission only on event.
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