Steering wheel issues

[jgannon]

Originally Posted by Al Skierkiewicz

Joey,
I was not able to find the pinout for this device but what you describe sounds like the interface is using some of the other +5 volt pins in addition to just pin 1. The OI only feeds +5 on pin 1. I would suspect from your description that there is a second pot for right hand turns and that the pedals are also not getting +5 volts. You will need to check all pins with a multimeter. There are a number of places on the web to obtain gameport pinouts. Use one of those as a starting point. There is also the possibility that this is a MIDI device and as such is incompatible with the OI. Many modern audio cards have MIDI enabled game ports.

Al,
I didn't realize that the OI didn't properly set up the other +5 and ground pins. In light of this, since pins 8, 9, and 15 are supposed to be +5, and pin 5 is supposed to be ground, I set Pwm1_green, Pwm1_red, and Pwm2_green high, and Pwm2_red low. This should accurately simulate the appropriate voltages in the wheel. I still only get feedback when turning the wheel to the left. However, I am now getting feedback from the gas pedal. When no pedals are depressed, I get 0. I can ease the gas pedal up over 200, and pressing the brake brings it back down to 0. Pressing the brake by itself does nothing. This seems to be a mirror of what's going on in the wheel. I will be making an adapter to connect pins 5, 8, 9, and 15 appropriately, but this should help me troubleshoot until then. Based on this new info, what's your hypothesis?