; ******************************************************
; BASIC .ASM template file for AVR
; ******************************************************

.include "E:\EEET22~1\TEACHI~1\Tools\VMLab\include\m32def.inc"
.DEF TEMP = R16 ;GENERAL PURPOSE ACCUMULATOR
.def TEMP1 = R17
.ORG $0000 ;STARTUP VECTOR

.ORG $0006 ;COMPARE MATCH VECTOR
.CSEG

;------ Reset and interrupt vectors ------------------------------
;
.ORG  0x00
START:
  rjmp ON_RESET
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
   reti
	ON_RESET:
	  ;  SBI DDRB,0           ;SET PORTB0 FOR OUTPUT
	   ; LDI TEMP,0b11001101    ;SET TO FAST PWM MODE 7
	  ;  OUT TCCR0, TEMP
	    LDI TEMP,0b00001101    ;SET PRESCALER/DIVIDER TO /1024
	    OUT TCCR0,TEMP
	   LDI TEMP, 128            ;SET COMPARE TO 128
	    OUT OCR0, TEMP




;	clr	R0				  			; use as zero value
   ldi   TEMP, low(RAMEND)   ; Init stack pointer
   out   SPL,  TEMP    			; RAMEND defined in M32DEF.INC
   ldi	TEMP, high(RAMEND)
   out	SPH,  TEMP                        ; Start of program source code
                              ;
 ldi TEMP,0xFF                 ; Set all pins of port D to be output
 out DDRC,TEMP
 ldi ZH,HIGH(2*SineTable)     ; Point Z to Table in flash
 ldi ZL,LOW(2*SineTable)
 clr TEMP

loop1:
       nop
       nop
       nop

       call Delay

loop2:
       lpm                    ; Read from table
                ; Write value to port D
       adiw ZL,1              ; point to next value
       dec TEMP                ; End of Table reached
       brne loop1
       ldi ZH,HIGH(2*SineTable); Point Z to Table in flash
       ldi ZL,LOW(2*SineTable)

       rjmp loop2

                              ;
                              ; End of source code
                              ;
                              ; Include sinewave table
                              ;
                              ;
                              ; Sinewave table for 8 bit D/A
                              ; VCC=5.000V, uLow=0.000V, uHigh=2.500V
                              ; (generated by sinewave.pas)
                              ;


	MAIN_LOOP: RJMP MAIN_LOOP;A DO-NOTHING LOOP

Sinetable:
.DB 64,65,67,68,70,72,73,75
.DB 76,78,79,81,82,84,85,87
.DB 88,90,91,92,94,95,97,98
.DB 99,100,102,103,104,105,107,108
.DB 109,110,111,112,113,114,115,116
.DB 117,118,118,119,120,121,121,122
.DB 123,123,124,124,125,125,126,126
.DB 126,127,127,127,127,127,127,127
.DB 128,127,127,127,127,127,127,127
.DB 126,126,126,125,125,124,124,123
.DB 123,122,121,121,120,119,118,118
.DB 117,116,115,114,113,112,111,110
.DB 109,108,107,105,104,103,102,100
.DB 99,98,97,95,94,92,91,90
.DB 88,87,85,84,82,81,79,78
.DB 76,75,73,72,70,68,67,65
.DB 64,62,61,59,58,56,54,53
.DB 51,50,48,47,45,44,42,41
.DB 39,38,36,35,34,32,31,30
.DB 28,27,26,25,23,22,21,20
.DB 19,18,17,15,14,13,13,12
.DB 11,10,9,8,8,7,6,5
.DB 5,4,4,3,3,2,2,2
.DB 1,1,1,0,0,0,0,0
.DB 0,0,0,0,0,0,1,1
.DB 1,2,2,2,3,3,4,4
.DB 5,5,6,7,8,8,9,10
.DB 11,12,13,13,14,15,17,18
.DB 19,20,21,22,23,25,26,27
.DB 28,30,31,32,34,35,36,38
.DB 39,41,42,44,45,47,48,50
.DB 51,53,54,56,58,59,61,62

Delay:   ret
         PUSH R16			; save R16 and 17 as we're going to use them
         PUSH R17       ; as loop counters
         PUSH R0        ; we'll also use R0 as a zero value for compare
         CLR R0
         CLR R16        ; init inner counter
         CLR R17        ; and outer counter
L1:      DEC R16         ; counts down from 0 to FF to 0
			CPSE R16, R0    ; equal to zero?
			RJMP L1			 ; if not, do it again
			CLR R16			 ; reinit inner counter
L2:      DEC R17
         CPSE R17, R0    ; is it zero yet?
         RJMP L1			 ; back to inner counter
;
         POP R0          ; done, clean up and return
         POP R17
         POP R16
         RET