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hello everyone:
I have a question.
I want to store some datum in my on-chip flash when my appliance programme running.I can write on-chip flash to store the datum .But if I update the software on my hareware,I have to reload the new software on on-chip flash,and the datum stored in on-chip flash is overlay or missing.
Can I lock the datum area without overlayed by reload the programme?
Develop entironment :Keil 3 for C166 MCU: XC167CI-32F
Thank you !
First off, you should reserve the space in your project, so that when building the application you get a code-space overflow when linking if the application becomes so large that it will need the sector(s) reserved for your data.
Some download applications have a feature to not just erase everything in the flash, but instead just erase the flash sectors that are needed by the new application.
If the download application does only support a full erase, then you will have to write an application that retrieves the data from the chip. Then creates a new download file containing both the application and the data and then writes down this custom-built file into the chip.