Re: [Amforth-devel] Help getting started with a atmeg644PA

[Andy K. <an...@ki...>]

Personaly i would go with the 644p (picopower 644) for the 644pa (644 picopower, automotive grade) 

grades for chips tend to be stuff like commercial, industrial, automotive, military. These normaly refer to how well the chip should survive lifes nastys like temperature ranges, radiation, vibration etc

so basicaly can be ignored by the average hobyist or commercial constructor. Go with the cheapest. (Military grade is normaly stupidly expensive).

Hope this helps.

Cheers

andy kirby 


-- 
Like a rolling stone
----- Original message -----
> Hello everyone,
> 
> I'm not sure if this it the right place to request help, but I don't
> see where else to do it, so I apologize if I'm asking in the wrong
> place.
> 
> As the subject suggests, I'm interested in getting amforth working on
> a atmega644PA chip. I've tried assembling amforth in Linux with avra,
> in Linux with wine/avrasm2, and in Windows with AVR Studio -- all
> without success.
> 
> Although the first two methods interest me more, perhaps we should
> start with the third, because there I was following instructions (from
> amforth-AVR-Studio.pdf -- are there instructions for the other two?) I
> get 10 errors and 2 warnings:
> 
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(2): warning:
> Use of undefined or forward referenced symbol 'UBRRL' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(3): warning:
> Use of undefined or forward referenced symbol 'UBRRH' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(4): warning:
> Use of undefined or forward referenced symbol 'UCSRC' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(5): warning:
> Use of undefined or forward referenced symbol 'UCSRB' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(6): warning:
> Use of undefined or forward referenced symbol 'UCSRA' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(7): warning:
> Use of undefined or forward referenced symbol 'UDR' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(8): warning:
> Use of undefined or forward referenced symbol 'RXC' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart.asm(9): warning:
> Use of undefined or forward referenced symbol 'UDRE' in .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\appl\HandHeldForth\template.asm(22):
> warning: Use of undefined or forward referenced symbol 'TXEN' in
> .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\appl\HandHeldForth\template.asm(23):
> warning: Use of undefined or forward referenced symbol 'UCSZ0' in
> .equ/.set
> C:\Users\Leon\Desktop\amforth-4.0\core\drivers/usart-isr-rx.asm(4):
> error: Use of undefined or forward referenced symbol 'URXCaddr' in
> .org
> C:\Users\Leon\Desktop\amforth-4.0\core\devices/atmega644p/device.asm(13):
> error: Overlap in .cseg: addr=0x1 conflicts with 0x0:0x2
> 
> Please let me know if I can provide any information that might help
> identify what I'm doing wrong.
> 
> After getting this to assemble, the next problem is getting it on a
> device. As I said, I'd like to use a atmega644PA, but I only see
> atmega644 and atmega644P in the devices directory. Can I use one of
> them, and if so, which one?
> 
> Thanks.
> -Leon
> 
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