help for reading data using serial port

[majdi_slimi]

hi everybody i am an engenier student and i am a beginner in mikro c
i have a projet that sends data using com port and it will be displayed using 7 segment displays.
when i send data for the first time i will be displayed perfectly but when i send data again 7 segment displays still display the old data
this is my isis project
and my mikro c program
hope that yo help me
************************************************************

Code: Select all

unsigned short count1;
char count;
char message[20]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; //initialisation du message
/*******************************************************************************/
unsigned short mask(char num) {  //fonction affichaage de chaque entier
  switch (num) {
  case '0' : return 0xFC;
  case '1' : return 0x60;
  case '2' : return 0xDA;
  case '3' : return 0xF2;
  case '4' : return 0x66;
  case '5' : return 0xB6;
  case '6' : return 0xBE;
  case '7' : return 0xE0;
  case '8' : return 0xFE;
  case '9' : return 0xF6; } //case end
}
/*******************************************************************************/
void decodeur(int B){  //decodage pour l'affichage de chaque digit
  switch (B) {
  case 0 : PORTD.F4=1;PORTD.F5=0;break;
  case 1 : PORTD.F4=0;PORTD.F5=1;break;
  case 2 : PORTD.F4=1;PORTD.F5=1;break;
  case 3 : PORTD.F6=1;PORTD.F7=0;break;
  case 4 : PORTD.F6=0;PORTD.F7=1;break;
  case 5 : PORTD.F6=1;PORTD.F7=1;break;
  case 6 : PORTE.F1=1;PORTA.F1=0;break;
  case 7 : PORTE.F1=0;PORTA.F1=1;break;
  case 8 : PORTE.F1=1;PORTA.F1=1;break;
  case 9 : PORTE.F2=1;PORTA.F5=0;break;
  case 10 : PORTE.F2=0;PORTA.F5=1;break;
  case 11 : PORTE.F2=1;PORTA.F5=1;break;
  }
}
/*******************************************************************************/
void Send_Data( unsigned short A){
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTB.F0 = 0;
    else PORTB.F0 = 1;
    PORTB.F1 = 1;
    PORTB.F1 = 0;
    Mask = Mask << 1;
  }
  PORTB.F2 = 1;
  PORTB.F2 = 0;
}
/*******************************************************************************/
void Send_Data1( unsigned short A){   //envoie des données
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTB.F3 = 0;
    else PORTB.F3 = 1;
    PORTB.F4 = 1;
    PORTB.F4 = 0;
    Mask = Mask << 1;
  }
  PORTB.F5 = 1;
  PORTB.F5 = 0;
}
/*******************************************************************************/
void Send_Data2( unsigned short A){     //envoie des données
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTB.F6 = 0;
    else PORTB.F6 = 1;
    PORTB.F7 = 1;
    PORTB.F7 = 0;
    Mask = Mask << 1;
  }
  PORTC.F0 = 1;
  PORTC.F0 = 0;
}
/*******************************************************************************/
void Send_Data3( unsigned short A){  //envoie des données
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTC.F1 = 0;
    else PORTC.F1 = 1;
    PORTC.F2 = 1;
    PORTC.F2= 0;
    Mask = Mask << 1;
  }
  PORTC.F3 = 1;
  PORTC.F3 = 0;
}
/*******************************************************************************/
void Send_Data4( unsigned short A){    //envoie des données
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTC.F4 = 0;
    else PORTC.F4 = 1;
    PORTC.F5 = 1;
    PORTC.F5= 0;
    Mask = Mask << 1;
  }
  PORTA.F0 = 1;
  PORTA.F0 = 0;
}
/******************************************************************************/
void DECOD1( unsigned short A){     //envoie des données
  unsigned short Mask=0b00000001 ,t,F;
  for (t=0;t<8;t++){
    F = A & Mask;
    if(F==0) PORTD.F1 = 0;
    else PORTD.F1 = 1;
    PORTD.F2 = 1;
    PORTD.F2= 0;
    Mask = Mask << 1;
  }
  PORTD.F3 = 1;
  PORTD.F3 = 0;
}
/******************************************************************************/
void newline(){
  UART1_Write(13); // Carriage Return 
  UART1_Write(10); // Line Feed 
}
/*******************************************************************************/
void main() {
  ADCON1 = 0x07;
  TRISA=0x00;
  TRISB=0x00;
  TRISC=0x80;
  TRISD=0x00;
  TRISE=0b000;
  PORTA=0x00;
  PORTA=0;
  PORTB=0;
  PORTC=0;
  PORTD=1;
  PORTE=0;
  UART1_Init(9600);    //initialisation du taux d'envoie des données
  Delay_ms(100);    // stabilisation
  UART1_Write_Text("START AFFICHEUR");
  newline();

  while(!UART1_Data_Ready());
  UART1_Read_Text(message,"a",21);
  UART1_write_Text(message);
  newline();
  do {
    /*******************************************************************************/
    DECOD1(0b10111111);
    count1= mask(message[0]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11011111);
    count1= mask(message[1]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11101111);
    count1= mask(message[2]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11110111);
    count1= mask(message[3]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11111011);
    count1= mask(message[4]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11111101);
    count1= mask(message[5]);
    Send_Data(count1);
    delay_ms(2);
    DECOD1(0b11111110);
    count1= mask(message[6]);
    Send_Data(count1);
    delay_ms(2);
    decodeur(0);
    count1= mask(message[7]);
    Send_Data1(count1);
    delay_ms(2);
    decodeur(1);
    count1= mask(message[8]);
    Send_Data1(count1);
    delay_ms(2);
    decodeur(2);
    count1= mask(message[9]);
    Send_Data1(count1);
    delay_ms(2);
    decodeur(3);
    count1= mask(message[10]);
    Send_Data2(count1);
    delay_ms(2);
    decodeur(4);
    count1= mask(message[11]);
    Send_Data2(count1);
    delay_ms(2);
    decodeur(5);
    count1= mask(message[12]);
    Send_Data2(count1);
    delay_ms(2);
    decodeur(6);
    count1= mask(message[13]);
    Send_Data3(count1);
    delay_ms(2);
    decodeur(7);
    count1= mask(message[14]);
    Send_Data3(count1);
    delay_ms(2);
    decodeur(8);
    count1= mask(message[15]);
    Send_Data3(count1);
    delay_ms(2);
    decodeur(9);
    count1= mask(message[16]);
    Send_Data4(count1);
    delay_ms(2);
    decodeur(10);
    count1= mask(message[17]);
    Send_Data4(count1);
    delay_ms(2);
    decodeur(11);
    count1= mask(message[18]);
    Send_Data4(count1);
    delay_ms(2);
    /*******************************************************************************/
  }       while(1);
}
/*******************************************************************************/

[dejan.odabasic]

Hello,

Have you tried to add the code which reads data from serial port:

Code: Select all

  while(!UART1_Data_Ready());
  UART1_Read_Text(message,"a",21);
  UART1_write_Text(message);
  newline();

Inside of your main do{...}while(1) loop?

Best regards.

[majdi_slimi]

yes i tried it but it still not working
the same message is still displayed

[dejan.odabasic]

Hello,

Then probably delay in main while loop is causing a UART data loss.
Try separating UART reading and display update in two separate functions.

Then you can test them separately how program behaves without the other function.

Best regards.