Hi,
I currently intend to use the on chip flash memory to store application data. But it looks like the maximum number of items I can store is 256 (0xFF). Additionally, the the system writes only to one page (2KB), even thought 2 pages are available (4KB). Here I describe my experiment.
1. Write to the fresh memory with the following code.
2. Boot the system and read the flash memory into a hex file. The following is what I get.
I get a few questions regarding this experiment.
a, Why the higher byte of the Item IDs are set to 0x00, even I wrote the IDs to be 0x01** ? That results in only 256 items can be written to the flash.
b.Why the second available page is not used.
c. I look through the source code, the beginning page number is 29. And we know the page header offset is 0. Then the calculated address is
memory address=(offset>>2)+(page<<9) (taken from the code) = 0x3a00. Why the actual address begins at 0xF000?
Thank in advance for your input.
HQ
