[Amforth-devel] Help getting started with a atmeg644PA

[Leon M. <leo...@gm...>]

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