Hello,
I am using Keil for development with my FRDM-LKL03Z board. It has the PKL03Z32VFK4 on-board. I would like to segment the flash memory into 3 parts:
1. For storing application(user) data. 2. For storing incoming FW binary for FOTA update. 3. For a custom bootloader. 4. For the running code.
Could you please help me with a template scatter file with these 4 segments defined? I will then modify the bounds of each section to suit my needs.
Thanks very much!
The application data doesn't need a separate partition, unless you have some logic to reconfiguring individual data values.
So one region for boot loader. One region for application. And maybe a third region for a downloaded copy. But this doesn't need to be a separate region in the Scatter file unless you plan to build your application in two versions for running at 2 different load addresses.
If all you need is a region for temporary storage of a new application, then it's enough to use the settings in the dialog to "hide" a large enough part of the flash. Then the application can use direct IAP commands to store the downloaded binary to this region. And then set a flag and reboot to request the boot loader to copy the fully retrieved new application image into the normal application flash region.
But as noted - boot loader and application should be built as individual projects or at least as individual targets, to make sure they are independent.