/*Tutorial 7
experiment purpose: familiar A/D conversion
segments connected to PORTD
Common Anodes : RA2>thouthands &RA3>hundreds & RA4>tens & RA5>ones
MCU : PIC16F877A 
MikroC PRO
ENG.F.ABDELAZIZ
http://www.eeecb.com/vb/index.php
*/


const char TABLE[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
                                                //define the table of constant 0-9

 void  init();                                         //I/O PORT initialize function declare
 void  display(int x);                           //display function declare
unsigned int  result=0x00;                            //define ADC convert result register
unsigned short i;
//------------------------------------------------


 //main program
 void  main()
 {

init();                                        //call initialize function



 while(1)                 
   {
   result=0x00;                                    //clear the convert result
   result = ADC_Read(0);
   display(result);                                //call display function
   }
  }
//-----------------------------------------------
 //initialize function

 void  init()
  {
    ADCON1=0X8E;              //set RA0 pin > ADC input ,the others general I/O
   TRISA=0X01;                //set RA0 INPUT,the others OUTPUT
   TRISD=0X00;               //set D PORT all OUTPUT   
   //PORTA=0XFF;
   //PORTD=0XFF;               //close all display
     }
//-----------------------------------------------
//display function
 void display(int x)
   {
     int  THOUTH,HAND,TEN,ONE,temp;   //define five temporary variable

     temp=x;                                                     //temporary keep AD convert result
     THOUTH = temp / 1000 ;                        //get display thouthands bit
     HAND = (temp % 1000) /100 ;    //get display hundreds bit
     TEN = (temp % 100) /10 ;                       //get display tens bit
     ONE = (temp % 10) ;                   //get display ones bit
     //
for (i = 0; i<=50; i++) {

     PORTD=TABLE[THOUTH];               //get the display thouthands bit code from table
     PORTA=0x3B;                             //RA2 OUTPUT low,light hundred bit display
     Delay_ms(1);                                 //delay some time,ensure display brightness

     PORTD=TABLE[HAND];         //get the display hundreds bit code from table
     PORTA=0x37;                             //RA3 OUTPUT low,light hundred bit display
     Delay_ms(1);                                 //delay some time,ensure display brightness

     PORTD=TABLE[TEN];                        //get the display tens bit code from table
     PORTA=0x2F;                             //RA4 OUTPUT low,light tens bit display
     Delay_ms(1);                                 //delay some time,ensure display brightness

     PORTD=TABLE[ONE];            //get the display ones bit code from table
     PORTA=0x1F;                             //RA5 OUTPUT low,light ones bit display
     Delay_ms(1);                                 //delay some time,ensure display brightness
   }
//
}

void UART1_Init(const unsigned long baud_rate);

UART1_Init(9600);

char UART1_Data_Ready();

// If data is ready, read it:
if (UART1_Data_Ready() == 1) { 
 receive = UART1_Read();
 }

char UART1_Read();

// If data is ready, read it:
if (UART1_Data_Ready() == 1) { 
 receive = UART1_Read();
 }

void UART1_Write(char _data);

unsigned char _data = 0x1E;
...
UART1_Write(_data);

char Temp = ‘A’;
UART1_Write (Temp);

void UART1_Read_Text(char *Output, char *Delimiter, char Attempts);

UART1_Init(9600);                                           // initialize UART1 module
Delay_ms(100);

while (1) {
  if (UART1_Data_Ready() == 1) {                  // if data is received 
    UART1_Read_Text(output, "OK", 10);    // reads text until 'OK' is found
    UART1_Write_Text(output);                      // sends back text 
 }
}

void UART1_Write_Text(char * UART_text);