I want to write 2 C51 programs, and they don't not run simulanesouly. One of the hex will reside at CODE area, the other will locate at XDATA area. Because the two hex file have some common functions. I want to save XDATA area space, how could I link some functions in XDATA HEX program to the CODE HEX program ? Is it possible or not? Thank for your reviewing .....
Online firmware updates are wonderful for the user, but a nightmare for the programmer...! which usually end up with it being a nightmare for the user. I refuse to update PC software where the software is "updated". If I can not install the new version and keep the old I do not update. In the embedded world the problem is that, invariably, some user will use the program in a way that discloses a previously unknown problem with the new release. Such a costomer will then install the previous rel and go on. How are you going to do that with "automatic updates"? Erik I am planning a system for updating a network of '51s and the means will be an USB disk. That way the user can start over (since this has been forseen) if the update fails. If there is a problem with the new SW, the customer can just reinstall the previous.