Atmega8 časovač2 – Assembler – Fórum – Programujte.com

Ahoj potreboval by som poradiť s časovačom na Atmega8. Nejde mi rozbehať rýchly PWM režím na časovači 2.

.include "m16def.inc"



.def cas0=r15

.def cas1a=r14

.def cas1b=r13

.def cas2=r12





.def temp1=r16 //pomocný register

.def temp2=r29

.def temp3=r30

.def temp4=r31



.def led1=r17   //rosvecuje led 

.def led2=r18

.def led3=r19

.def led4=r20

.def led5=r21

.def led6=r22

.def led7=r23

.def led8=r24

.def led9=r25

.def led10=r26

.def led11=r27

.def led12=r28



.equ casovaca=64  //šírka impulzu

.equ casovacb=191

.equ casovac2=126

//***************************************************************************************************



    

    ldi temp1,low(ramend)

    out spl,temp1

    ldi temp1,high(ramend)

    out sph,temp1







    ldi temp1,7 // nastavý výstupy

    out ddrb,temp1

    

    

/********************************************************************

                    nastavenie časovačov

*********************************************************************/



    ldi temp1,casovaca

    out ocr1bl,temp1

    ldi temp1,casovacb

    out ocr1al,temp1

    ldi temp1,casovac2

    out ocr2,temp1



// nastavy casovace, preddelicka 1





    ldi temp1,(1<<com1a0)|(1<<com1a1)|(1<<wgm10)|(0<<com1b0)|(1<<com1b1)

    mov cas1a,temp1



    ldi temp1,(0<<cs12)|(0<<cs11)|(1<<cs10)

    mov cas1b,temp1

    ldi temp1,(1<<wgm20)|(1<<com20)|(0<<cs22)|(0<<cs21)|(1<<cs20)

    mov cas2,temp1



    ldi temp1,(1<<wgm20)|(1<<wgm21)|(1<<com21)|(0<<com20)|(0<<cs22)|(0<<cs21)|(1<<cs00)

    mov cas2,temp1





    

    out tccr1a,cas1a

    out tccr1b,cas1b

    

    

//    rcall cakaj1

    out tccr2,cas2

















slucka:

    nop

    rjmp slucka





cakaj1:  // caka 64 period

    

        ldi temp1,16

    cakaj1_a:

        ldi temp2,1

    cakaj1_b:

        ldi temp3,1

    cakaj1_c:

        dec temp3

        brne cakaj1_c

        dec temp2

        brne cakaj1_b

        dec temp1

        brne cakaj1_a

        

        nop

        nop



        ret

Nepovolil jsi FOC2... řádek 68

ldi temp1,(1<<FOC2)|(1<<wgm20)|(1<<wgm21)|(1<<com21)|(0<<com20)|(0<<cs22)|(0<<cs21)|(1<<cs00)