Capturing digits from PORTB and send it to screen via UART

[Subashini]

The programme I have done so far works except that it cannot capture the output which is 88 (integer) from PORTB to the screen via UART. Can someone tell me what is the problem with my code that it cannot display the integer but it can send all the characters. When I compile there is no error. But it still cannot display any result.

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Code C - [expand]
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/*
  PIC16F628A at 4.0 MHz external clock, MCLR enabled
*/
 
 
sbit IR_Tx at RA3_bit;
sbit DD0_Set at RA2_bit;
sbit DD1_Set at RA1_bit;
sbit DD2_Set at RA0_bit;
sbit start at RB7_bit;
unsigned short j, DD0, DD1, DD2, DD3;
unsigned short pulserate, pulsecount;
unsigned int i;
//-------------- Function to Return mask for common anode 7-seg. display
unsigned short mask(unsigned short num) {
 switch (num) {
 case 0 : return 0xC0;
 case 1 : return 0xF9;
 case 2 : return 0xA4;
 case 3 : return 0xB0;
 case 4 : return 0x99;
 case 5 : return 0x92;
 case 6 : return 0x82;
 case 7 : return 0xF8;
 case 8 : return 0x80;
 case 9 : return 0x90;
 } //case end
}
 
void delay_debounce(){
 Delay_ms(300);
}
 
void delay_refresh(){
 Delay_ms(5);
}
 
void countpulse(){
 IR_Tx = 1;
 delay_debounce();
 delay_debounce();
 TMR0=0;
 Delay_ms(15000);  // Delay 1 Sec
 IR_Tx = 0;
 pulserate = 22*4;
}
 
void display(){
  DD0 = pulserate%10;
  DD0 = mask(DD0);
  DD1 = (pulserate/10)%10;
  DD1 = mask(DD1);
  DD2 = pulserate/100;
  DD2 = mask(DD2);
  for (i = 0; i<=180*j; i++) {
    DD0_Set = 0;
    DD1_Set = 1;
    DD2_Set = 1;
    PORTB = DD0;
    delay_refresh();
    DD0_Set = 1;
    DD1_Set = 0;
    DD2_Set = 1;
    PORTB = DD1;
    delay_refresh();
    DD0_Set = 1;
    DD1_Set = 1;
    DD2_Set = 0;
    PORTB = DD2;
    delay_refresh();
    }
  DD2_Set = 1;
}
 
 void newline()
{
 UART1_Write(13); // Carriage Return
 UART1_Write(10); // Line Feed
}
 
void main() {
 unsigned char MyError, Temp;
 UART1_Init(9600);
 Delay_ms(100);
 UART1_Write_Text("Ready to know your heartbeat ?? :D ");
 Temp = DD0,DD1,DD2;
 newline();
 UART1_Write_Text("Your Heartbeat rate is : ");
 UART1_Write(Temp);
 newline();
 newline();
 
 CMCON = 0x07;    // Disable Comparators
 TRISA = 0b00110000; // RA4/T0CKI input, RA5 is I/P only
 TRISB = 0b10000000; // RB7 input, rest output
 OPTION_REG = 0b00101000; // Prescaler (1:1), TOCS =1 for counter mode
 pulserate = 0;
 j = 1;
 display();
 
  do {
  if(!start){
   delay_debounce();
   countpulse();
   j= 3;
   display();
  }
 } while(1);  // Infinite loop
 }

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[Er.abdulrehman]

What it is sending when you are pressing 88.

 

[Subashini]

It suppose to send the number 88 to the screen via uart.

 

[internetuser2k12]

This is wrong.

Delay_ms(15000);  // Delay 1 Sec

It should be

Delay_ms(1000);

Have you set the proper baud rate in hyperterminal?

 

[Magvitron]

it might be the problem with your UART setting. double check that.

 

[internetuser2k12]

Can you post your schematic?