RE: [avrdude-dev] Speeding up flash/eeprom download

[Bernard Fouché]

For avarice, since my target is clocking at 3.6866Mhz, I have to
use -B500Khz. Would that mean that transfers are close to 500Kbs ? (that
would be 4 times the avrisp speed and so would be good!)

With avrdude the flashing system writes the flash & eeprom, read them back
to be sure everything is okay, then the target performs some tests and at
last the eeprom is read again to get the results from the tests. Is a
similar scheme possible with avarice? I just saw the '--program' option and
nothing to get back full images from the target. I suppose that it is
possible since JTAG allows a lot more than ISP however that would mean
modifiying avarice ?


-----Message d'origine-----
De : E. Weddington [mailto:address@hidden
Envoyé : mardi 2 novembre 2004 17:38
À : address@hidden
Cc : Bernard Fouché; address@hidden
Objet : Re: [avrdude-dev] Speeding up flash/eeprom download


Matthias Weißer wrote:

> Bernard Fouché schrieb:
>
>> Hi there.
>>
>> I'm currently using avrdude to flash some products with an AVRISP.
>> The FLASH
>> & EEPROM images are actually in Intel Bin Hex file format and I'm
>> looking
>> for ways to shorten the download time. I don't know what serial speed is
>> used by avrdude, I think it's 115 200bps. Can I go to a higher speed?
>> Would
>> the download be faster if I switch to binary file format? Any hint
>> welcome!
>
>
> No it wouldn't. The AVRISP get's it's data in binary format. The only
> way to go is to use a faster programmer (with a faster interface than
> RS232 and maybe higher SPI clock rates to the target AVR).
>

I've also heard that you can get faster downloads using a JTAG ICE with
avarice.

Eric