> Many of our devices have serial ports so we use a Bootloader > for programming > these. > For those devices without a serial port, we want to supply a ICSP > programming function > that can be run within our main software. Can't you just call the vendor-provided b the source of the PC software and work from that. Mine is in Python, but a C port exists (google for XWisp2). Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products docent Hogeschool van Utrecht: www.voti.nl/hvu -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist