AVR-Chat

Are you using an external crystal or internal RC Osc ? In case you are using
RC to derive clock you might want to shift the value in UBRR +/- 2.

On Sat, Apr 5, 2008 at 8:26 PM, Brian <blue_eagle74@yahoo.com> wrote:

>   I made a program in asm that kinda works. the only problem is when my
> mega16 xmits to hyperterminal I get weird symbols. I am working with
> 4Mhz 4800 baud. the letters in sram are in hex format. But the
> symbols in HT look like they are from the extended ascII table. My
> baud rate is set at 0x51. Has anyone else have a simliar problem?
>
> Brian
>
> ..........
> main:
> ldi ZH,high(message*2) ; Load high part of byte
> address into ZH
> ldi ZL,low(message*2) ; Load low part of byte
> address into ZL
> clr r0 ;
>
> menu:
> lpm ; Load byte
> from program memory into r0
> nop ;
> nop ;
> tst r0 ; Check if I
> reached the end of the message
> breq run ; If so, continue
> mov treg, r0 ;xmit message
> rcall txcomp ;
> adiw ZL,1 ; Increase Z registers
> rcall menu ;
> .........
> message:
> .db $50,$72 ; P ,r
> .db $65,$73 ; e ,s
> .db $73,$20 ; s ,SP
> .db $61,$6E ; a ,n
> .db $79,$20 ; y ,SP
> .db $6B,$65 ; k ,e
> .db $79,$20 ; y ,SP
> .db $74,$6F ; t ,o
> .db $20,$63 ; SP,c
> .db $6F,$6E ; o ,n
> .db $74,$69 ; t ,i
> .db $6E,$75 ; n ,u
> .db $65,$0A ; e ,LF
> .db $0A,$0D ; LF,CR
> .db $00,$00 ; END
>
>  
>



-- 
Ranjit


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