Hi All modules loads fine. The system log tells me that everything is working. I will recheck the chip address and try Rudolf "grounding-some-pins" methode. Thanks again, especially for the force command on the pcf8574. /Andreas > Hi Andreas, > >> So I tried to load the following modules: i2c_core, i2c_algo_bit, >> i2c_pport, i2c_dev, i2c_sensor, pcf8574. >> Should I be able to se my pcf8574 chip that is hooked up on my >> parallel port now? Cause I can not! Do I have to consider cables >> (length and others) or have I done anything else wrong? Some hints on >> trouble shooting would be apreciated. > > First thing to try is to load i2c-algo-bit with bit_test=1. This will > test the lines when you load i2c-pport. If it fails, then you have a > wiring issue, most probably. The debug message should tell you where. > > If the i2c-pport driver loads, try i2cdetect on the bus. This will give > you an idea of whether the bus works as intended or not. > > Hope that helps, > -- > Jean Delvare >
