Re: loading hex file
Hi,
If you use a mcu with ISP feature (In System Program), you can download a hex file via serial port. You can do that with the software that the Manufacter have for you to download (free), for example:
if you use a mcu from ATMEL, you can download "flip" programmer, from ATMEL's site;
if you use a mcu from PHILIPS, you can download "Flash Magic" programmer from "h**p://www.esacademy.com/software/flashmagic/";
this 2, i had worked whith and are very easy to work whith.
regards.