Anders 
Need to konw how to debug the 1 wire interface. The intrface stops after some hour. Need to know if it is the microcontroller on the 7" display or the 1 wire device driver causing the problem. Belive there is a thread in the 1 wire driver which stops of some reason. Is the driver allocating memory in runtime. What happens if some other application has a memory leek? Can any body help? Thanks