AVR-Chat

On Wed, 21 Jun 2006 11:28:04 -0300 you wrote:

>I know that SPIEN default value is 0 to allow Low-voltage Serial Programming
>Mode is ENABLED but AVRStudio  shows it with a ? inside a gray box. 
>
>Is because AVRISP can’t read it?

No, it can't write it using ISP. I presume for safety reasons.

>Ricardo Callejo
>
>SURbyte
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>  _____  
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>De: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] En nombre de
>Ralph Hilton
>Enviado el: Miércoles, 21 de Junio de 2006 09:34 a.m.
>Para: AVR-Chat@yahoogroups.com
>Asunto: Re: [AVR-Chat] Setting ISP frecuency from Codevision
>
> 
>
>On Wed, 21 Jun 2006 09:23:02 -0300 you wrote:
>
>>How can i set to one specific value the ISP frecuency using Codevision and
>STK500? 
>>STK500 firmware was updated with AVRStudio 4.12.
>>If i check Execute User's Program a Command Button called Programm Setting
>is enabled.
>>This button has three options : 
>> Program Directory and Filename -> i set with stk500.exe path
>> Command Line parameters -> i set with -I460.80khz but doesn't work.
>STK500.exe help says that -I frequency is the way to modify this parameter.
>I probe it with or without space.
>> Working directory -> nothing.
>>This was my course of action. But it's wrong.
>>
>>I am programming the flash with AVRSTUDIO, changing the ISP frecuency to
>1/4 Crystal (3.68Mhz) each time i need to reprogram the MCU. 
>>When i set it to 460.8Khz, the systems works, and i can program the flash.
>>I read many threads about this problem. I understand that the main problem
>can be the SPIEN fuse and that you must change it to Internal ISP clock. Of
>course, I did it but Codevisión still can't program the flash. 
>
>The SPIEN fuse must be left in its default programmed state or ISP
>programming is disabled.
>
>--
>Ralph Hilton
>http://www.ralphhil <http://www.ralphhilton.org> ton.org
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--
Ralph Hilton
http://www.ralphhilton.org
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