Saitek St290 User Manual download pdf (Page 8)

USB-Chicklet 1/2/2007

Cross The Road Electronics, LLC Page 8 1/2/2007

end the calibration routine so don't worry about accidentally hitting them.

8. The LED will again blink: green, red, green, red, and then will stay red after

centering the joystick(s). Remove calibration header and use as normal.

6.) Suggestions

1. The USB-Chicklet stores the user calibration data internally. Because some of this

information, such as axis calibration data, can be unique per device, for example

because of mechanical imperfections, it is recommended that users keep the same

USB-Chicklet with the same device. For example if you have two Logitech gamepads

and two USB-Chicklets, keep the gamepad and USB-Chicklet pairs the same to

prevent from having to continually calibrate.

2. Keep all analog devices, joysticks axes, etc... centered when plugging into the

USB-Chicklet. Most HID USB devices recenter themselves internally on power up

based on their initial state, so if a joystick is pushed full forward and then plugged in,

position 127 may be read at full forward. In the case of joystick throttle on the

supported joysticks, move throttle to one extreme end prior to plugging into USB-

Chicklet.

3. Due to the asynchronous nature of USB, there may be instances where you plug in

a USB device, and USB-Chicklet may not recognize the peripheral until you disconnect

and reconnect the device. Although such instances are rare, we recommend including

a disconnect in custom-built operator interfaces to prevent from having to take the

interface apart just to disconnect/reconnect device. Cycling power to USB-Chicklet will

have the same effect as reconnecting the device.

7.) Functional Limitations

1. The Logitech NASCAR Racing Wheel may not connect immediately. It may even

require frequent (three or more) reconnects in order for USB-Chicklet to recognize

device. However this issue only occurs on initial power up of the device. Once the

steering wheel is connected (LED is green), device should not disconnect or show any

erroneous behavior. It is also recommended that the pedals be connected to the

steering wheel.

2. The analog outputs of USB-Chicklet may not extend the entire 0-255 range. Worst-

case range would be approximately 20- 235, in which case it is recommended that the

application code scale the input. For example if 20-235 is the observed range of your

USB-Chicklet then the following algorithm will scale [20,235] into [0,255].

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Saitek St290 User Manual Page 8