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9 years, 1 month ago.
How to use more than 64Kb flash memory for the K64F
If the value for NUM_SECTORS is greater than 16 (64kB) then the MCU locks up or freezes during the for loop using function erase_sector(), with no errors reported.
It would be nice to use more than 128KB of flash memory realizing that the functions with
__attribute__((section(".ARM.__at_0x10080"))) static void setupserial(void) {
are using the upper sectors which should not be erased.
I suspect the bootloader function with address
__attribute__((section(".ARM.__at_0x10000"))) void bootloader(void) {
is being erased when NUM_SECTORS is greater than 16, since
0x10000
is decimal 65536.
Would I be correct in concluding that for the FRDM-K64F with 1MB flash I need to change the start address mapping to a larger number?
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1 Answer
9 years, 1 month ago.
You are correct, I randomly choose that value, you will need to move it to a larger value if you need more flash. I randomly picked that one, and since it is sufficient for just demonstrating how to do it I never changed it. Now if you do more than 16 sectors it indeed erases its own bootloader.