gnupic@linuxhacker.org

gnupic@linuxhacker.org


Subject: Re: Nearly done picp 18F252/452 & similar parts
From: Alexandre Pereira Nunes
Date: Tue, 14 Oct 2003 01:18:28 -0300

Scott Dattalo wrote:

>Alexandre,
>
>I finally got around to upgrading my PICStart+ firmware. I tried your new 
>patches for programming an 18F452. They work!
>
>I verified that program memory and the configuration fuses can be written.  
>I was a little confused when erase failed to work, but determined that
>this was not a problem. (The write operation will re-program each location
>anyways). With MPLAB, I noticed that the erase operation is very brief
>(less than a couple of seconds). With picp, it takes about a minute and
>then it reports that it failed.
>
>I have not tested code protection, data memory program, or ID location 
>programming.
>
>Thanks for the work!
>
>  
>


That's great news (at least for me)! :-)

But this behaviour with the erase command is curious ... Here it (i.e. 
-ef command) takes a couple of seconds and return ok. In fact, the 
reply  from the picstart to the erase operation is almost instantaneous, 
the delay is due to the verify command issued afterwards, which is 
perceptible on devices with some amount of memory, like the 18f452.

What firmware version are you using on the ps+?

Thanks for your report, I hope to release a new version of the patch 
next week, if I find the time to implement some few missing things.

Cheers,

Alexandre


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