Hello,

I have a basic understanding problem regarding the EFC internal latch buffer.

The datasheet mentions:


Basically this is clear, and should be the data source, which has to be written to the flash. However, I do not understand how to tell the EFC which buffer to use. In the examples they use the

uint8_t pPageBuffer[AT91C_IFLASH_PAGE_SIZE];

but I did not find the spot, where the EFC is told to use this buffer. However, it seems to work but I just don't understand this.

Can someone shine a light on this?

Thanks,
Bas

Hello -



The EFC doesn't actually use this buffer it is just a staging buffer, what the EFC requires is the page number to write the latch buffer data to.

If you study the code you should see that:
- this staging buffer is populated with the data to be written.
- then, this staging buffer is copied to flash memory addresses (this copy is actually storing the data into the latch buffer).
- finally, this is followed by an EFC command to write the latch buffer data to a page number in flash (data is written a page at a time).

Hope this helps.

Regards,

Hi,

yes thanks, it helped a lot and also makes sence .

Everything is clear now.

Thanks again,
Bas