Posted on May 17, 2011 at 09:57I know why this is.
There are #define errors in the code.
What it is doing is running from bank 0 which is 512K (or 256).
At 0x80000 the 32K bank 1 resides.
Now when you run the program it only erases the first sector which is 8K.
There is some confusion as it the source thinks it is actually erasing a 64K sector.
You need to do an erase at 0x80000 + 0x2000 and so on....
Then you will have erased all sectors of the 32K bank 1.
You can then download to bank 1 - a max code size of 32K.
When you jump to new application it swaps around the banks so your d/l app will reside at 0x000.
You need to make sure your main app does not try and swap the banks around in init.s.
I have swapped the banks around using a switch accessed by jlink commander so that I have a (default) bootloader running in the 32K bank 1 - this allows me to d/l a much bigger main app.
I am using some bits of AN2475.
It now works for me but I have to work out how to handle the exceptions and reset (which starts up the smaller bootloader) - bootloader will probably check to see if theres a valid main app and run it after a timeout.
