hanson@tramp.colorado.edu (HANSON JEFFREY ALLAN) (01/16/91)
Hello netters, I have been given the task of writing a device driver for a digital i/o board to be used under ISC 2.2 . I have no device driver writing experience which is why I am posting this request. I am looking for : 1. good advice (always welcome) 2. possibly some code segments of examples of similar drivers 3. or even a sample driver of a similar device. I realize as devices go that this is relativley simple but my lack of experience with drivers makes me uncomfortable just 'diving in'. I have looked through the ISC Integrated Software Development Guide but would feel more comfortable after seeing some examples. The device is a RTI-817 card made by Analog Devices and is a 24-bit channel which can be divided into (3) 8 bit ports. Each port can be either input or output (hardware selectable). One port supports an interrupt when the inputs on it have changed. I would like to have read capabilities for one port and write for the other 2. Any experience/advice which anyone would like to share will be much appreciated. The card occupies an 8-bit bus slot also. Thanks, Jeff Hanson hanson@tramp.colorado.edu