Error when Run code

[moafaneh]

Hello Everyone, the following code display an error when i press error i can know what is the problem

Code: Select all

//Interface of DHT11 with PIC16F84A MikroC code
//Please read the datasheet of DHT11 sensor to understand the code
//Written by: BENCHEROUDA Okba
//electronnote@gmail.com
//Use at your own risk

// LCD module connections
 sbit LCD_RS at RB5_bit;
 sbit LCD_EN at RB4_bit;
 sbit LCD_D4 at RB3_bit;
 sbit LCD_D5 at RB2_bit;
 sbit LCD_D6 at RB1_bit;
 sbit LCD_D7 at RB0_bit;
 sbit LCD_RS_Direction at TRISB5_bit;
 sbit LCD_EN_Direction at TRISB4_bit;
 sbit LCD_D4_Direction at TRISB3_bit;
 sbit LCD_D5_Direction at TRISB2_bit;
 sbit LCD_D6_Direction at TRISB1_bit;
 sbit LCD_D7_Direction at TRISB0_bit;
 // End LCD module connections
 unsigned char *text,mytext[4];
 unsigned  a, b, i, t, rh;

 void StartSignal(){
 TRISB.F6 = 0;    //Configure RB6 as output
 PORTB.F6 = 0;    //RB6 sends 0 to the sensor
 delay_ms(18);
 PORTB.F6 = 1;    //RB6 sends 1 to the sensor
 delay_us(30);
 TRISB.F6 = 1;    //Configure RB6 as input
  }
 void CheckResponse(){
 a = 0;
 delay_us(40);
 if (PORTB.F6 == 0){
 delay_us(80);
 if (PORTB.F6 == 1)   a = 1;   delay_us(40);}
 }
 void ReadData(){
 for(b=0; b<8; b++){
 while(!PORTB.F6);                   //Wait until PORTB.F6 goes HIGH
 delay_us(30);
 if(PORTB.F6 == 0)  i&=~(1<<(7-b));   //Clear bit (7-b)
 else{i|= (1 <<( 7 - b));             //Set bit (7-b)
 while(PORTB.F6);}                    //Wait until PORTB.F6 goes LOW
 }
 }
 void error(){
 text="ERROR";
  Lcd_Out(1,6,text);
  }
 void main() {
 TRISB = 0;        //Configure PORTB as output
 PORTB = 0;        //Initial value of PORTB
 Lcd_Init();
 while(1){
 Lcd_Cmd(_LCD_CURSOR_OFF);        // cursor off
 Lcd_Cmd(_LCD_CLEAR);             // clear LCD
  StartSignal();
  CheckResponse();
  if(a == 1){
  ReadData();
  rh = i;
  ReadData();
  ReadData();
  t = i;
  ReadData();
  ReadData();
  if(i = rh + t){
  text = "Temp:  .0C";
  Lcd_Out(1, 4, text);
  text = "Humi:  .0%";
  Lcd_Out(2, 4, text);
  ByteToStr(t,mytext);
  Lcd_Out(1, 9, Ltrim(mytext));
  ByteToStr(rh,mytext);
  Lcd_Out(2, 9, Ltrim(mytext));}
  else error();
  }
  else error();
  delay_ms(2000);
  }
  }
 

This is the errors


Please help me with this
thanks

[filip]

Hi,

The identifier a is already declared in the definition file of the MCU, please change the name to aa (for example) and the code will compile.

Regards,
Filip.