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4 Decimal, 7-Segment counter (0-9999)

 
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TselelTJ



Joined: 10 Mar 2010
Posts: 3

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4 Decimal, 7-Segment counter (0-9999)
PostPosted: Wed Mar 10, 2010 11:27 am     Reply with quote
Good Day ppl.

I'm taking my baby steps with ccs code.
May somebody help me with the code for the following:

The cct must count from 0 to 9999 and it uses a switch which stops the count at any moment, when switch closes it starts again at 0.

1. PIC18F2220
2. Switch at RC0.
3. Bus Wire [RB0-RB7] to U1-U4 (74HC373)
4. Four 7-Segment displays (Common Anode)
5. RC1-RC4 LE wires to U1-U4 (74HC373)
6. OE is Grounded (74HC373)

Thanks in advance.
TselelTJ



Joined: 10 Mar 2010
Posts: 3

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PostPosted: Fri Mar 12, 2010 3:26 am     Reply with quote
I was able to do the ff but now i need help with the switch, If the switch is open all segments must be off and when closed it must start from 0.


Code:

#include "Counter_7Seg.h"

char map[10]={0xc0,oxf9,0xa4,0xb0,0x99,0x82,0xf8,0x80,0x09};

void main (){

int i, j, k, l;

       port_b_pullups(TRUE);
       setup_adc_ports(NO_ANALOGS|VSS_VDD);
       setup_adc(ADC_OFF|ADC_TAD_MUL_0);
       setup_spi(SPI_SS_DISABLED);
       setup_wdt(WDT_OFF);
       setup_timer_0(RTCC_INTERNAL);
       setup_timer_1(T1_DISABLED);
       setup_timer_2(T2_DISABLED,0,1);
       setup_comparator (NC_NC_NC);
       setup_vref(FALSE);
//Setup_Oscillator parameter not selected from Intr Oscillator Config tab

    i=0;
    j=0;
    k=0;
    l=0;

    delay_ms(1000);
    while(TRUE)
    {
     if(input(PIN_C0))
     output_b(map[i]);
     output_high(PIN_C4);
     delay_ms(30);
     output_low(PIN_C4);

     if(input(PIN_C0))
     output_b(map[j]);
     output_high(PIN_C3);
     delay_ms(30);
     output_low(PIN_C3);

     if(input(PIN_C0))
     output_b(map[k]);
     output_high(PIN_C2);
     delay_ms(30);
     output_low(PIN_C2);

     if(input(PIN_C0))
     output_b(map[l]);
     output_high(PIN_C1);
     delay_ms(30);
     output_low(PIN_C1);

     if(i<10)
     {
      i++;
      }
            if(i==10)
      {
       j++;
       i=0;
       }
            if(j==10)
      {
       k++;
       j=0;
       }
            if(k==10)
      {
       l++;
       j=0;
       }
            if(l==10)
       {
        i=0;
        j=0;
        k=0;
        l=0;}
       }
}
jbmiller



Joined: 07 Oct 2006
Posts: 73
Location: Greensville,Ontario

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PostPosted: Sun Mar 14, 2010 7:09 am     Reply with quote
Just a tip on coding...
It'll help if you name variables with what they mean instead of i,j,k,...
Same goes true for I/P pins...tens_digit,ones_digit,....

While you may remember them for the next few days, a week or so from now, you'll be asking, What does this mean !! Been there..did that !

It also helps everyone else trying to help you out !

Also if you need to reassign a pin, it can be done with one line of code at the beginning, instead of looking for all of them in a few hundred lines of code!

Hope this helps

Jay
TselelTJ



Joined: 10 Mar 2010
Posts: 3

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PostPosted: Thu Mar 18, 2010 8:17 am     Reply with quote
Here is the working code, I finally got it right...

Code:
#include "Assignment.h"

char map[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

void main(){

int8 DD1=0, DD2=0, DD3=0, DD4=0;

   port_b_pullups(TRUE);
   setup_adc_ports(NO_ANALOGS|VSS_VDD);
   setup_adc(ADC_OFF|ADC_TAD_MUL_0);
   setup_spi(SPI_SS_DISABLED);
   setup_wdt(WDT_OFF);
   setup_timer_0(RTCC_INTERNAL);
   setup_timer_1(T1_DISABLED);
   setup_timer_2(T2_DISABLED,0,1);
   setup_comparator(NC_NC_NC_NC);
   setup_vref(FALSE);
//Setup_Oscillator parameter not selected from Intr Oscillotar Config tab
   
   output_high(PIN_C4);
   output_high(PIN_C3);
   output_high(PIN_C2);
   output_high(PIN_C1);
   
   while(TRUE)
   {
   if(input(PIN_C0))
   {
   output_b(0xff);
   output_b(map[DD1]);
   output_high(PIN_C4);
   delay_ms(30);
   output_low(PIN_C4);
   
   output_b(map[DD2]);
   output_high(PIN_C3);
   delay_ms(30);
   output_low(PIN_C3);
   
   output_b(map[DD3]);
   output_high(PIN_C2);
   delay_ms(30);
   output_low(PIN_C2);
   
   output_b(map[DD4]);
   output_high(PIN_C1);
   delay_ms(30);
   output_low(PIN_C1);
   
   if(DD1<10)
   {
   DD1++;
   }
      if(DD1==10)
   {
   DD1=0;
   DD2++;
   }
       if(DD2==10)
   {
   DD2=0;
   DD3++;
   }
       if(DD3==10)
   {
   DD3=0;
   DD4++;
   }
       if(DD4==10)
   DD4=0;
   }
   else
   {
   output_high(PIN_C4);
   output_high(PIN_C3);
   output_high(PIN_C2);
   output_high(PIN_C1);
   output_b(0xff);
   DD1=0;
   DD2=0;
   DD3=0;
   DD4=0;
   }

}
}
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