Judging from the code, it is cross platform and the only platform code is the serial communication program serial.c. It is a pity that there are very few comments. If not, this may be quite a good learning example for me. Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist