Em 25/3/2011 13:27, Olin Lathrop escreveu:
> Isaac Marino Bavaresco wrote:
>> The boot-loader is not yet finished but I did some tests in the real
>> hardware today, and they show that the word-programming works.
> I have done bootloaders for dsPIC parts.  These have to erase a whole era=
se
> block at a time.  My bootloaders then write whole write blocks within eac=
h
> erase block.  So far that seems to have worked without incident.  I don't
> see why a bootloader would want to write individual words.
>
> I think that could wear out the flash faster too.  It's possible that eac=
h
> word write effects the whole write block.  If a write block is 32 words i=
n
> size, then writing each word individually may stress the flash as if the
> whole block were written 32 times.  I don't know if this is true, but I c=
an
> certainly see how it could be.
>
> Again, word writes don't make much sense for a bootloader.


Word-writes serve other purposes also. Microchip has an EEPROM-emulation
library for devices without internal EEPROM, but it only works for
devices that accept word-writes.


Best regards,

Isaac
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