> I still get no result but maybe there is a hardware > problem as the program complains about shorted 1-wire bus. I will > try another DS2480B chip to see if there is no misunderstanding > because of faulty or wrongly soldered chips.
Did you take care of pin6 (polarity) of the DS2480B? It makes a difference whether the DS2480B is connected directly to the UART pin or to a RS232 level shifter (which also inverts the polarity of the logic signal). The data sheet says: "pin 6 must be tied to VDD for direct UART connection". I use an original Dallas/Maxim DS9097U serial to 1-wire Adapter (with 9-pin D connector) which contains the DS2480B. Connecting the adapter to /dev/ttyS3 on the Fox socket board works fine with the test programms provided by the Dallas 1-wire SDK (e. g. tstfind). The levels provided by the RS23 level shifter on the socket board are 5 V, so the DS9097U can operate within specs. The DS2480B requires a supply voltage of 5 V, which is drawn from the RTS/CTS lines of the RS232 interface. BTW, this is my first contribution to this group, so I would like to say hallo to all the group members and thank you for the many interesting contributions. Regards Klaus
