AVR-Chat

Assembler2 - - I thought it was standard in the latter version of AVR
Studio.

USB to RS232 - having bought and tosses a few of these, for reasons you
cite, the one I have now works quite well.  It's a China no-name but uses
the FTDI chipset.  You can end it all by buying a 4 or 8 port USB to serial
box on eBay, really cheap, made by Edgeport. Super reliable. See item
5788134094 on eBay


-----Original Message-----
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
Of Gustavo Goretkin
Sent: Monday, July 11, 2005 8:24 PM
To: AVR-Chat@yahoogroups.com
Subject: Re: [AVR-Chat] Bootloader troubles E2END

Hmm, I don't have that directory, I have AVR studio 4, the most recent I 
believe, and the help file mentions Avr Assembler 2. Anyways, I assume 
that is the end of the Eeprom  memory for the device since the Mega 8 
has 512k , like the Mega 16.
I assembled the code, and I tried the boot loader, and if didn't work 
:(. It didn't even recognize the device.

Anyways, I found the problem with the USB to RS232 converter, and the 
actual level translator is powered from the TX line of the  serial port, 
and apparently the STK500's MAX232 isnt supplying enough power, im 
getting + and - 6 volts on its TX line, any suggestions please?

Thank you

stevech wrote:

> I found E2END in this directory and file:
> C:\Program Files\Atmel\AVR Tools\AvrAssembler2\Appnotes\m8def.inc
> It is NOT in this file
> C:\Program Files\Atmel\AVR Tools\AvrAssembler\Appnotes
>
> Note the "2" in the pathname for the former, not the latter.
> Go figure.
>
> Steve
> ===========
>
> Mega8 chip...
>
>                  ; ***** DATA MEMORY DECLARATIONS
> *****************************************
>                  .equ      FLASHEND      = 0x0fff      ; Note: Word 
> address
>                  .equ      IOEND      = 0x003f
>                  .equ      SRAM_START      = 0x0060
>                  .equ      SRAM_SIZE      = 1024
>                  .equ      RAMEND      = 0x045f
>                  .equ      XRAMEND      = 0x0000
>                  .equ      E2END      = 0x01ff
>                  .equ      EEPROMEND      = 0x01ff
>                  .equ      EEADRBITS      = 9
>                  #pragma AVRPART MEMORY PROG_FLASH 8192
>                  #pragma AVRPART MEMORY EEPROM 512
>                  #pragma AVRPART MEMORY INT_SRAM SIZE 1024
>                  #pragma AVRPART MEMORY INT_SRAM START_ADDR 0x60
>
> ======================================================================
> '
>
>
> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
> Of Kathy Quinlan
> Sent: Sunday, July 10, 2005 7:47 AM
> To: AVR-Chat@yahoogroups.com
> Subject: Re: [AVR-Chat] Bootloader troubles
>
> Gustavo Goretkin wrote:
> > Thank you for your reply. I'm trying to assemble the code, but im
> > experiencing some trouble,
> >         ldi     R26,low(E2END-1)         ; increment Chip Erase Counter
> > located at address E2END-1
> >         ldi     R27,high(E2END-1)         ;
> >
> > I don't quite understant what E2END is, and where it is supposed to be
> > defined/ equated
> > thanks again
> >
> > stevech wrote:
>
>
> I would hazard a guess that  E2END is value equivalent to the last
> location of the EEPROM. I am not sure if this is an Atmel define or a
> complier one.
>
> Regards,
>
> Kat.
>
>
>
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