Hello,
I was using my Orangutan SVP 1284 for over a year and everything seemed to work corectlly, However, yesterday, when I tried to connect my Sharp analog distance sensor to ports A0-A7, it wasn’t working properly. For example, I connected it to pin A0, made program to read value from that pin (under 10bit conversion) and i started the program- afer startup the value was around 390 and it rapidly lowered to 240, after there was no change, regardless the reading of the sensor. I assumed that the sensor is malfunctioning, so I meassured its output with external voltmeter: it was fine.To eliminate possibility of program error, I decided to try svp-demo-program from examples folder of pololu library, and make it show analog values. Trimpot readings were correct, analog pins readings A-D on second processor were correct, but when i connected my sensor to A0-A7 pin, the value of all 0-7 channels was changing in the same time ( I mean, the sensor was connected to A0, but values of all channels were changing to the same numbers). I tried to compile the program from 2 different computers, with USB programmer and also external ISP programmer and i got the same result. Any ideas? (BTW I tried more then one sensor- i got the same result)