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Can this be done?

Can this be done?

2004-03-01 by Kathy Quinlan

Can I emulate easily an EEPROM with an AVR ?

Problem: I have an Atmel USB DEV kit, it will not program the EEPROM via
the parallel port like it should. Atmel have taken 3 months soo far and
still it is not resolved.

I need to get an urgent job done, so I was thinking of using an 8515 or
Mega128 to emulate the EEPROM and download the code via RS-232.

The EEPROM is an AT25HP256, it is not the EEPROM that is faulty, it is
the GAL on the BOARD :o( (I wish they would email me the code for it
then I could knock something up.

The two options I am toying with :

#1 an AVR emulates the EEPROM

#2 the AVR programs the EEPROM and then tri states after programming so
that the EEPROM is connected to the DEV board


Which option seems the best ?

I do not want to be plugging and unplugging the EEPROM as it is in a
machine pin socket :o(

Regards,

Kat.

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Re: [AVR-Chat] Can this be done?

2004-03-01 by Mike Murphree

On Feb 29, 2004, at 10:11 PM, Kathy Quinlan wrote:

>
> Can I emulate easily an EEPROM with an AVR ?
>
> Problem: I have an Atmel USB DEV kit, it will not program the EEPROM 
> via
> the parallel port like it should. Atmel have taken 3 months soo far and
> still it is not resolved.
>
> I need to get an urgent job done, so I was thinking of using an 8515 or
> Mega128 to emulate the EEPROM and download the code via RS-232.
>
> The EEPROM is an AT25HP256, it is not the EEPROM that is faulty, it is
> the GAL on the BOARD :o( (I wish they would email me the code for it
> then I could knock something up.
>
> The two options I am toying with :
>
> #1 an AVR emulates the EEPROM
>
> #2 the AVR programs the EEPROM and then tri states after programming so
> that the EEPROM is connected to the DEV board

How about using an AVR to program a SRAM, then connect that to your
development board?

ROM emulators used to be fairly common...

Mike

RE: [AVR-Chat] Can this be done?

2004-03-01 by Kathy Quinlan

> -----Original Message-----
> From: Mike Murphree [mailto:mike@tropo.org] 
> Sent: Monday, 1 March 2004 12:34 PM
> To: AVR-Chat@yahoogroups.com
> Subject: Re: [AVR-Chat] Can this be done?
> 
> 
> 
> On Feb 29, 2004, at 10:11 PM, Kathy Quinlan wrote:
> 
> >
> > Can I emulate easily an EEPROM with an AVR ?
> >
> > Problem: I have an Atmel USB DEV kit, it will not program the EEPROM
> > via
> > the parallel port like it should. Atmel have taken 3 months 
> soo far and
> > still it is not resolved.
> >
> > I need to get an urgent job done, so I was thinking of 
> using an 8515 
> > or Mega128 to emulate the EEPROM and download the code via RS-232.
> >
> > The EEPROM is an AT25HP256, it is not the EEPROM that is 
> faulty, it is 
> > the GAL on the BOARD :o( (I wish they would email me the 
> code for it 
> > then I could knock something up.
> >
> > The two options I am toying with :
> >
> > #1 an AVR emulates the EEPROM
> >
> > #2 the AVR programs the EEPROM and then tri states after 
> programming 
> > so that the EEPROM is connected to the DEV board
> 
> How about using an AVR to program a SRAM, then connect that 
> to your development board?

The EEPROM is question has the ability to do block reads, and is spi, so
I can not make an SRAM do that :o(

 
> ROM emulators used to be fairly common...
> 
> Mike
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> ---
> Incoming mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
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>  
> 

---
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Re: Can this be done?

2004-03-01 by poitsplace

Ummm...can't you just bang out a quickie programmer and use 
ponyprog?  They have some VERY SIMPLE programmer schematics on the 
site as well

http://www.lancos.com/prog.html


--- In AVR-Chat@yahoogroups.com, "Kathy Quinlan" <kat-yahoo@k...> 
wrote:
> 
> 
> > -----Original Message-----
> > From: Mike Murphree [mailto:mike@t...] 
> > Sent: Monday, 1 March 2004 12:34 PM
> > To: AVR-Chat@yahoogroups.com
> > Subject: Re: [AVR-Chat] Can this be done?
> > 
> > 
> > 
> > On Feb 29, 2004, at 10:11 PM, Kathy Quinlan wrote:
> > 
> > >
> > > Can I emulate easily an EEPROM with an AVR ?
> > >
> > > Problem: I have an Atmel USB DEV kit, it will not program the 
EEPROM
> > > via
> > > the parallel port like it should. Atmel have taken 3 months 
> > soo far and
> > > still it is not resolved.
> > >
> > > I need to get an urgent job done, so I was thinking of 
> > using an 8515 
> > > or Mega128 to emulate the EEPROM and download the code via RS-
232.
> > >
> > > The EEPROM is an AT25HP256, it is not the EEPROM that is 
> > faulty, it is 
> > > the GAL on the BOARD :o( (I wish they would email me the 
> > code for it 
> > > then I could knock something up.
> > >
> > > The two options I am toying with :
> > >
> > > #1 an AVR emulates the EEPROM
> > >
> > > #2 the AVR programs the EEPROM and then tri states after 
> > programming 
> > > so that the EEPROM is connected to the DEV board
> > 
> > How about using an AVR to program a SRAM, then connect that 
> > to your development board?
> 
> The EEPROM is question has the ability to do block reads, and is 
spi, so
Show quoted textHide quoted text
> I can not make an SRAM do that :o(
> 
>  
> > ROM emulators used to be fairly common...
> > 
> > Mike
> > 
> > 
> > 
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> >  
> > 
> > ---
> > Incoming mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004
> >  
> > 
> 
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004

RE: [AVR-Chat] Re: Can this be done?

2004-03-01 by Kathy Quinlan

> -----Original Message-----
> From: poitsplace [mailto:lmburt@email.uncc.edu] 
> Sent: Monday, 1 March 2004 6:15 PM
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Re: Can this be done?
> 
> 
> Ummm...can't you just bang out a quickie programmer and use 
> ponyprog?  They have some VERY SIMPLE programmer schematics on the 
> site as well
> 
> http://www.lancos.com/prog.html
> 


Hmmmmm yeah that may do it :o)

Regards,

Kat.

 
> --- In AVR-Chat@yahoogroups.com, "Kathy Quinlan" <kat-yahoo@k...> 
> wrote:
> > 
> > 
> > > -----Original Message-----
> > > From: Mike Murphree [mailto:mike@t...]
> > > Sent: Monday, 1 March 2004 12:34 PM
> > > To: AVR-Chat@yahoogroups.com
> > > Subject: Re: [AVR-Chat] Can this be done?
> > > 
> > > 
> > > 
> > > On Feb 29, 2004, at 10:11 PM, Kathy Quinlan wrote:
> > > 
> > > >
> > > > Can I emulate easily an EEPROM with an AVR ?
> > > >
> > > > Problem: I have an Atmel USB DEV kit, it will not program the
> EEPROM
> > > > via
> > > > the parallel port like it should. Atmel have taken 3 months
> > > soo far and
> > > > still it is not resolved.
> > > >
> > > > I need to get an urgent job done, so I was thinking of
> > > using an 8515
> > > > or Mega128 to emulate the EEPROM and download the code via RS-
> 232.
> > > >
> > > > The EEPROM is an AT25HP256, it is not the EEPROM that is
> > > faulty, it is
> > > > the GAL on the BOARD :o( (I wish they would email me the
> > > code for it
> > > > then I could knock something up.
> > > >
> > > > The two options I am toying with :
> > > >
> > > > #1 an AVR emulates the EEPROM
> > > >
> > > > #2 the AVR programs the EEPROM and then tri states after
> > > programming
> > > > so that the EEPROM is connected to the DEV board
> > > 
> > > How about using an AVR to program a SRAM, then connect that
> > > to your development board?
> > 
> > The EEPROM is question has the ability to do block reads, and is
> spi, so
> > I can not make an SRAM do that :o(
> > 
> >  
> > > ROM emulators used to be fairly common...
> > > 
> > > Mike
> > > 
> > > 
> > > 
> > >  
> > > Yahoo! Groups Links
> > > 
> > > 
> > > 
> > >  
> > > 
> > > ---
> > > Incoming mail is certified Virus Free.
> > > Checked by AVG anti-virus system (http://www.grisoft.com).
> > > Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004
> > >  
> > > 
> > 
> > ---
> > Outgoing mail is certified Virus Free.
> > Checked by AVG anti-virus system (http://www.grisoft.com).
> > Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004
> 
> 
> 
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Version: 6.0.593 / Virus Database: 376 - Release Date: 20/02/2004

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