Re: [Amforth] amforth 4.4 & ATMEGA16.txt

[Erich W. <ew....@na...>]

Hello,

On 06/16/2011 02:49 PM, pao...@fa... wrote:
> Hi guys,
> I’m trying to compile a system for an ATMEGA16 board.
<snip>


> atmega16.asm(26): warning: Use of undefined or forward referenced symbol 'TXEN0' in .equ/.set
> atmega16.asm(29): warning: Use of undefined or forward referenced symbol 'TXEN0' in .equ/.set
> atmega16.asm(34): warning: Use of undefined or forward referenced symbol 'UCSZ00' in .equ/.set
> ../../core\drivers/usart_0.asm(1): warning: Use of undefined or forward referenced symbol 'UBRR0L' in .equ/.set
> ../../core\drivers/usart_0.asm(2): warning: Use of undefined or forward referenced symbol 'UBRR0H' in .equ/.set
> ../../core\drivers/usart_0.asm(3): warning: Use of undefined or forward referenced symbol 'UCSR0C' in .equ/.set
> ../../core\drivers/usart_0.asm(4): warning: Use of undefined or forward referenced symbol 'UCSR0B' in .equ/.set
> ../../core\drivers/usart_0.asm(5): warning: Use of undefined or forward referenced symbol 'UCSR0A' in .equ/.set
> ../../core\drivers/usart_0.asm(11): warning: Use of undefined or forward referenced symbol 'UDRIE0' in .equ/.set
> ../../core\drivers/usart_0.asm(11): error: Invalid redefinition of 'UDRIE'
> ../../core\drivers/usart_0.asm(12): warning: Use of undefined or forward referenced symbol 'RXC0' in .equ/.set
> ../../core\drivers/usart_0.asm(13): warning: Use of undefined or forward referenced symbol 'UDRE0' in .equ/.set

This looks familiar ...

Make sure that the controller type is referenced corrctly in the makefile:
MCU=atmega16

yes in the makefile, not in template.asm.



The atmega-16 may need a few more lines in template.asm:

1. after the baud rate add the 5 ".equ ..." lines

; initial baud rate of terminal
.equ BAUD = 115200
; additional .equs for "old fashioned" mcu with usart, not usart0
.equ TXEN0  = TXEN
.equ RXEN0  = RXEN
.equ RXCIE0 = RXCIE
.equ UCSZ00 = UCSZ0
.equ TXCIE0 = TXCIE


2.
.include "drivers/usart.asm"
-----------------------^^ remove the _0 here.

This works for me on atmega-32.

Good luck,
Erich