How to set Proteus 7 Segment Refresh rate with PIC 16F628A

asking · Dec 22, 2012

Hello,

i m trying to build one counter circuit with 4 7-Segment multiplexing... my program is correct but still not properly working with proteus simulation...so guyz.. i need to calculate how to calculate refresh rate "Minimum Trigger" setting in 7 segment display properties....should i keep it default or some calculation is required ?

i have attached the image...i have kept 5ms refresh rate for display but still proteus is not showing proper...data..on display....please help...

MikroC Code:

Code:

unsigned short i, DD0, DD1, DD2, DD3;
unsigned int Count;
//------ Function to Return mask for common anode 7-seg. display
unsigned short mask(unsigned short num) {
 switch (num) {
  case 0 : return 0x3F;
  case 1 : return 0x06;
  case 2 : return 0x5B;
  case 3 : return 0x4F;
  case 4 : return 0x66;
  case 5 : return 0x6D;
  case 6 : return 0x7D;
  case 7 : return 0x07;
  case 8 : return 0x7F;
  case 9 : return 0x6F;
 } //case end
}
void main() {
  CMCON  |= 7;        // Disable Comparators
  TRISB = 0x00; // Set PORTB direction to be output
  PORTB = 0xff;    // Turn OFF LEDs on PORTB
  TRISA = 0b00100000; // RA5 is input only
  Count   =    0;  // Initial Value of Counter

  do {
  DD0 = Count%10;  // Extract Ones Digit
  DD0 = mask(DD0);
  DD1 = (Count/10)%10; // Extract Tens Digit
  DD1 = mask(DD1);
  DD2 = (Count/100)%10; // Extract Hundreds Digit
  DD2 = mask(DD2);
  DD3 = (Count/1000);  // Extract Thousands Digit
  DD3 = mask(DD3);

  for (i = 0; i<=50; i++) {
      PORTB = DD0;
      RA0_bit = 0;      // Select Ones Digit
      RA1_bit = 1;
      RA2_bit = 1;
      RA3_bit = 1;
      delay_ms(5);
      PORTB = DD1;
      RA0_bit = 1;
      RA1_bit = 0;     // Select Tens Digit
      RA2_bit = 1;
      RA3_bit = 1;
      delay_ms(5);
      PORTB = DD2;
      RA0_bit = 1;
      RA1_bit = 1;
      RA2_bit = 0;     // Select Hundreds Digit
      RA3_bit = 1;
      delay_ms(5);
      PORTB   = DD3;
      RA0_bit = 1;
      RA1_bit = 1;
      RA2_bit = 1;
      RA3_bit = 0;     // Select Thousands Digit
      delay_ms(5);
      }
      Count = Count + 1 ;
      if (Count > 9999) Count = 0;
  } while(1);          // endless loop
}

peiwei_Studio · Dec 25, 2012

Code:

unsigned short i, DD0, DD1, DD2, DD3;
unsigned int Count;
//------ Function to Return mask for common anode 7-seg. display
unsigned short mask(unsigned short num) {
 switch (num) {
  case 0 : return 0x3F;
  case 1 : return 0x06;
  case 2 : return 0x5B;
  case 3 : return 0x4F;
  case 4 : return 0x66;
  case 5 : return 0x6D;
  case 6 : return 0x7D;
  case 7 : return 0x07;
  case 8 : return 0x7F;
  case 9 : return 0x6F;
 } //case end
}
void main() {
  CMCON  |= 7;        // Disable Comparators
  TRISB = 0x00; // Set PORTB direction to be output
  PORTB = 0xff;    // Turn OFF LEDs on PORTB
  TRISA = 0b00100000; // RA5 is input only
  Count   =    0;  // Initial Value of Counter

  do {
  DD0 = Count%10;  // Extract Ones Digit
  DD0 = mask(DD0);
  DD1 = (Count/10)%10; // Extract Tens Digit
  DD1 = mask(DD1);
  DD2 = (Count/100)%10; // Extract Hundreds Digit
  DD2 = mask(DD2);
  DD3 = (Count/1000);  // Extract Thousands Digit
  DD3 = mask(DD3);

  for (i = 0; i<=50; i++) {
  
  
      RA3_bit = 1;		//disable RA3
      PORTB = DD0;
      RA0_bit = 0;      // Select Ones Digit
      RA1_bit = 1;
      RA2_bit = 1;
      delay_ms(5);
	  
      RA0_bit = 1;		//disable RA0
      PORTB = DD1;
      RA1_bit = 0;     // Select Tens Digit
      RA2_bit = 1;
      RA3_bit = 1;
      delay_ms(5);
	  
      RA1_bit = 1;		//disable RA1
      PORTB = DD2;
      RA0_bit = 1;
      RA2_bit = 0;     // Select Hundreds Digit
      RA3_bit = 1;
      delay_ms(5);
	  
      RA2_bit = 1;		//disable RA2
      PORTB   = DD3;
      RA0_bit = 1;
      RA1_bit = 1;
      RA3_bit = 0;     // Select Thousands Digit
      delay_ms(5);
      }
      Count = Count + 1 ;
      if (Count > 9999) Count = 0;
  } while(1);          // endless loop
}

asking · Dec 28, 2012

thanks...but i did not noticed any changes in program and also how you connected that display with those arrows ? i m not able to find that.......

peiwei_Studio · Jan 3, 2013

These are different.

Code:

/*********************************************************** 
Part of old code
***********************************************************/ 
//for example DD0=0x7D display="6",DD1=0x4F display="3"
PORTB = DD0;//DD0=0x7D
RA0_bit = 0;// Select Ones Digit, display X X X 6
RA1_bit = 1;//display X X X 6
RA2_bit = 1;//display X X X 6
RA3_bit = 1;//display X X X 6
delay_ms(5);//hold
PORTB = DD1;//DD1=0x4F,becasue RA0_bit=0,[COLOR="#FF0000"]display X X X 3,this is the wrong results![/COLOR]
RA0_bit = 1;//display X X X X
RA1_bit = 0;//Select Tens Digit,display X X 3 X
RA2_bit = 1;
RA3_bit = 1;
delay_ms(5);
PORTB = DD2;
RA0_bit = 1;
RA1_bit = 1;
RA2_bit = 0;// Select Hundreds Digit
RA3_bit = 1;
delay_ms(5);
PORTB   = DD3;
RA0_bit = 1;
RA1_bit = 1;
RA2_bit = 1;
RA3_bit = 0;// Select Thousands Digit
delay_ms(5);
/*********************************************************** 
Part of new code
***********************************************************/ 
//for example DD0=0x7D display="6",DD1=0x4F display="3"
RA3_bit = 1;//disable RA3,display X X X X
PORTB = DD0;//DD0=0x7D
RA0_bit = 0;// Select Ones Digit,display X X X 6
RA1_bit = 1;//display X X X 6
RA2_bit = 1;//display X X X 6
delay_ms(5);//hold
RA0_bit = 1;//disable RA0,display X X X X
PORTB = DD1;//DD1=0X4F
RA1_bit = 0;// Select Tens Digit,display X X 3 X
RA2_bit = 1;
RA3_bit = 1;
delay_ms(5);
RA1_bit = 1;//disable RA1
PORTB = DD2;
RA0_bit = 1;
RA2_bit = 0;// Select Hundreds Digit
RA3_bit = 1;
delay_ms(5);
RA2_bit = 1;//disable RA2
PORTB   = DD3;
RA0_bit = 1;
RA1_bit = 1;
RA3_bit = 0;// Select Thousands Digit
delay_ms(5);

- - - Updated - - -

The circuit of the same wire label is connected.Reference ISIS help“wire label”.

asking · Jan 3, 2013

thanks aton for information..

How to set Proteus 7 Segment Refresh rate with PIC 16F628A

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How to set Proteus 7 Segment Refresh rate with PIC 16F628A

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