JoyAdapter
USB Adapter for Gameport Joysticks and Atari, C64,
Amiga Joysticks
Introduction:
JoyAdapter is for connecting an analog gameport joystick or a digital
(atari, c64, amiga ...) joystick to the USB port.
The firmware is based on the MJoy-project from Mindaugas Milasauskas
which is based on the USB firmware from Igor Cesko.
No additional software or driver is needed - just plug and play.
Features:
- supports analog gameport joysticks and digital joysticks (atari,
c64, amiga ...)
- no driver required
- USB powered
Changes, Modifications:
- interrupt pin is now connected to "D-" line because
due to the 1.5 kOhm resistor it is more robust against electrical
interference
- modified "INT0Handler" - removed possible deadlock situation
if wrong interrupts occur
- modified "SendPreparedUSBAnswer" - level changes of
"D+" and "D-" lines at same time instance
- ReportDescriptor now describes a simple joystick with X/Y (8bit)
and two buttons with transmission of data in one report only
- string reported to windows is not resctricted to 4 characters
anymore (the solution for this problem was posted on the USB-IF
Developers Discussion Forum by "Grendel")
Images of my assembly:
Schematic (click for a bigger image):
Partlist:
| IC2 |
Atmel AVR Mega8 |
| Q1 |
Crystal, 12 MHz |
| C1, C2 |
22p |
| C3, C4, C6, C7, C8 |
100n |
| C5 |
10u |
| R1 |
4k7 |
| R6 |
2k2 |
| R2, R5 |
100k |
| R3, R4 |
100 |
| SV1 |
pinheader 5x2 |
| X2 |
d-sub connector, 15-pol, female |
| X4 |
d-sub connector, 9-pol, male
|
| X3 |
usb connector (B) |
Download:
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