Re: BL4S100 delay rutine and conversion analog to digital

On 8/20/2012 8:55 PM, Nestor Hernandez wrote:
>
> Hello,
> This is the first time I use a bl4s100. I created a program to made
> data acquisition of 50 point, between each point there is a delay of
> 100 ms. The delay time is calculate using this equation Td=
> Mc*(13*Ni+6)*(32*No+6), where Mc is the time per machine cycle, and Ni
> and No represent immediate values load into HL and BC, respectively.
> The program compile and run well, the problems is on conversion analog
> to digital does not work and the delay time neither. Someone  could
> help me, in order to make this program work well. Is there any other
> way to create a delay routine of 100 ms?
> Thanks in advance,
>  
> I add the program
> #use "BL4S1xx.LIB"
> main ()
> {
>    int tiempo,i,a;
>    auto char buffer[10];
>    auto float Volts1,Volts2,A1,A2,*a1,*a2;
>    auto float Volts_A1[50],Volts_A2[50];
>  
>    brdInit();
>  
>    printf("\nPRESS ENTER TO START\n");
>    gets(buffer);
>  
>    for ( i = 0; i <50; i++)
>        {
>             Volts1=anaInVolts(1,1);
>                         Volts2=anaInVolts(2,1);
>                         A1=(10*Volts1);
>                         A2=(0.5*Volts2)-1,1389;
>             a2=&A2;
>                         a1=&A1;
>                         Volts_A1[i]=*a1;
>                         Volts_A2[i]=*a2;
>  
>             #asm
>             PUSH  AF;
>             PUSH  BC;
>             PUSH  HL;
>             LD                  BC,0x17h;
> OUTER:                      LD                   HL,0x19Fh;
> INNER:                       DEC    HL;
>                                                LD                   A,H;
>             OR      L;
>             JP    NZ, INNER;
>             DEC    BC;
>             LD                  A,B;
>             OR                  C;
>             JP                    NZ,OUTER;
>             POP    HL;
>             POP    BC;
>             POP    AF;
>             #endasm
>                         printf("%f\t %f\t
> %d\n",Volts_A1[i],Volts_A2[i], i);
>                         }
>   }

I seem to remember there is a init function to set up the A/D.

As for a delay:

void delayMS((unsigned long millisecs)
{
    unsigned long stime=MS_TIMER;
    while ((MS_TIMER-stime)<millisecs)
        ;
}

You can put stime=MS_TIMER at the start of your for loop. Then the while
loop at the end. That will make each loop 100ms.

Also, printf's will slow things way down.

-- 
------------------------------------------
     Scott G. Henion, Consultant
Web site:    http://SHDesigns.org
------------------------------------------