AVR-Chat

At 04:49 PM 2/12/04 -0000, you wrote:
>
>Made some changes, I wondered if I should be use .db instead of .EQU=, tried
>that, same thing.
>

.db puts the data in physically into the flash, .equ does NOT. So your
array MUST be made up by the define byte directive.

ORG 0200	;make it 0x0200 to be safe

array:		;assign a label
.db	0x00,0x01,0x02			;, etc ,etc

	ldi	xl,low(array*2)
	ldi	xh,high(array*2)	;x now points to the start of array

	add	xl,step			;I presume that step and num  are registers
	adc	xh,num			;x now should point to your data..(may need to multiply
somewhere)
	
	LPM  				;data in r0 or  LPM  r18,Z
...................				

ORG 0200	;make it 0x0200 to be safe

array:		;assign a label
.db	0x00,0x01,0x02			;, etc ,etc


>  MOV  r30,step  //this one 0-255?
>  MOV  r31,num   //this one 0-15?
>  SUBI r31,HIGH(-array)
>  LPM  r18,Z
>  OUT  PORTD,r18


Regards

John Samperi

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