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Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?
From: |
Bob Paddock |
Subject: |
Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ? |
Date: |
Sat, 4 Jul 2009 07:37:59 -0400 |
...
> You're perhaps confusing that with debugWIRE. As debugWIRE is a
> one-wire protocol, it has to live with delays, caused by RC time
> constants of the circuitry.
...
> ISP is basically the SPI engine of the controller, running in slave
> mode. As the entire SPI engine is a synchronous system clocked by the
> IO clock of the AVR, the IO clock must be quite a bit faster than the
> ISP clock (the ISP clock line itself is sampled within the SPI engine,
> and ISP clock edges are detected during that sampling).
I have a question related to debugWIRE vs SPI internal to a Tiny88.
A colleague of mine, new to AVRs, tried to use debugWIRE to step
through some code that I gave him. In my code I turned off the SPI
port through the Power Reduction Register.
Once he hit that point, the part died. Anyway to recover them?
I did not expect to see any interaction of the SPI and debugWIRE
myself?
--
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- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Vincent Trouilliez, 2009/07/03
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Joerg Wunsch, 2009/07/03
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Vincent Trouilliez, 2009/07/03
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Joerg Wunsch, 2009/07/04
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?,
Bob Paddock <=
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Vincent Trouilliez, 2009/07/04
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Heike C. Zimmerer, 2009/07/04
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, David Kelly, 2009/07/04
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Joerg Wunsch, 2009/07/05
- PRSPI documentation (was: Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?), Heike C. Zimmerer, 2009/07/05
- Re: PRSPI documentation (was: Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?), Joerg Wunsch, 2009/07/06
- [avr-chat] Re: PRSPI documentation, Heike C. Zimmerer, 2009/07/06
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Joerg Wunsch, 2009/07/04
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Heike C. Zimmerer, 2009/07/06
- Re: [avr-chat] Dragon: mega slow at dumping Flash, normal ?, Vincent Trouilliez, 2009/07/04