[PIC] Need help for pic12f675

FvM · Nov 29, 2016

Using timer interrupts is possible of course, but not actually necessary for this simple application.

uzzalpic · Nov 29, 2016

Yes, I searched for OSCON but didn't find it in the Compiler and hence thought there is no Internal Oscillator. Later found that INTRC Oscillator is set in config fuses and it has just 4 MHz INTRC Oscillator.

There was a hidden bug. Fixed it. In the project settings.

New code.

Code C - [expand]
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#define ON  1
#define OFF 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
 
//Timer1
//Prescaler 1:8; TMR1 Preload = 3036; Actual Interrupt Time : 500 ms
//Place/Copy this part in declaration section
void InitTimer1() {
    T1CON = 0x31;
    TMR1IF_bit = 0;
    TMR1H = 0x0B;
    TMR1L = 0xDC;    
    INTCON = 0xC0;    
}
 
void Interrupt() {
    if((TMR1IE_bit) && (TMR1IF_bit)) { 
        //Enter your code here        
        if(led_flag == 0) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
        
           if(++counter == ten_seconds_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        else if(led_flag == 1) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
           
           if(++counter == three_minutes_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        
        TMR1IF_bit = 0;
        TMR1H = 0x0B;
        TMR1L = 0xDC;        
    }
}
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void Enable_Timer1_Interrupts() {
    TMR1IE_bit = 1;
}
 
void main() {
       
    CMCON = 0x07;
    ANSEL = 0x00;
    TRISIO = 0x08;
    GPIO = 0x00;
    
    InitTimer1();
    
    button_state = 1;
    
    while(1) {
    
           if((!SW) && (!button_state)){
               Delay_ms(50);
               if((!SW) && (!button_state)){
                  Turn_Off_Leds_And_Reset_Counters();
                  led_flag = 0;
                  Enable_Timer1_Interrupts();
                  button_state = 1;
               }
           }
           else if((SW) && (button_state)) {
                  Delay_ms(50);
                  if((SW) && (button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 1;
                      Enable_Timer1_Interrupts();
                      button_state = 0;
                  }
           }
    }
}

when unpressed switch yellow led is blinking 3 min and then green ledglowing, its fine but when I pressed switch all light stay off. I want when I pressed switch yellow led blinking 10 sec then green led will glow and yellow will off. please check this code

Okada · Nov 29, 2016

Here is the new project which uses delays instead of timer interrupts.

@andre_teprom

I had to post all project files without cleaning the project folder because if I clear the project folder of unnecessary files and then compile the code then projects (config) settings were changing to default.

Using Delays

Code C - [expand]
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#define ON  1
#define OFF 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
sbit run_flag at myFlags.B2;
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void main() {
       
    CMCON = 0x07;
    ANSEL = 0x00;
    TRISIO = 0x08;
    GPIO = 0x00;
    
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }   
    
    while(1) {
    
           Delay_ms(500);
           
           if((!SW) && (!button_state)){
               Delay_ms(50);
               if((!SW) && (!button_state)){
                  Turn_Off_Leds_And_Reset_Counters();
                  led_flag = 0;                  
                  button_state = 1;
                  run_flag = 1;
               }
           }
           else if((SW) && (button_state)) {
                  Delay_ms(50);
                  if((SW) && (button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 1;                      
                      button_state = 0;
                      run_flag = 1;
                  }
           }
           
           if(run_flag) {
               if(led_flag == 0) {
                   if(++blink_counter == 2) {
                        blink_counter = 0;
                        Yellow_Led = ~Yellow_Led;
                   }
                
                   if(++counter == ten_seconds_delay_count) {
                        counter = 0;
                        Green_Led = ON;
                        run_flag = 0;                                   
                   }
               }
               else if(led_flag == 1) {
                   if(++blink_counter == 2) {
                        blink_counter = 0;
                        Yellow_Led = ~Yellow_Led;
                   }
                   
                   if(++counter == three_minutes_delay_count) {
                        counter = 0;
                        Green_Led = ON;
                        run_flag = 0;                                   
                   }
               }              
           }
    }
}

Using Timer Interrupt

Code C - [expand]
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#define ON  1
#define OFF 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
 
//Timer1
//Prescaler 1:8; TMR1 Preload = 3036; Actual Interrupt Time : 500 ms
//Place/Copy this part in declaration section
void InitTimer1() {
    T1CON = 0x31;
    TMR1IF_bit = 0;
    TMR1H = 0x0B;
    TMR1L = 0xDC;    
    INTCON = 0xC0;    
}
 
void Interrupt() {
    if((TMR1IE_bit) && (TMR1IF_bit)) { 
        //Enter your code here        
        if(led_flag == 0) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
        
           if(++counter == ten_seconds_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        else if(led_flag == 1) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
           
           if(++counter == three_minutes_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        
        TMR1IF_bit = 0;
        TMR1H = 0x0B;
        TMR1L = 0xDC;        
    }
}
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void Enable_Timer1_Interrupts() {
    TMR1IE_bit = 1;
}
 
void main() {
       
    CMCON = 0x07;
    ANSEL = 0x00;
    TRISIO = 0x08;
    GPIO = 0x00;
    
    InitTimer1();
    
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }
    
    while(1) {
    
           if((!SW) && (!button_state)){
               Delay_ms(50);
               if((!SW) && (!button_state)){
                  Turn_Off_Leds_And_Reset_Counters();
                  led_flag = 0;
                  Enable_Timer1_Interrupts();
                  button_state = 1;
               }
           }
           else if((SW) && (button_state)) {
                  Delay_ms(50);
                  if((SW) && (button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 1;
                      Enable_Timer1_Interrupts();
                      button_state = 0;
                  }
           }
    }
}

Made the code non-blocking.

Code C - [expand]
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#define ON  1
#define OFF 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
 
unsigned int ten_seconds_delay_count = 200;
unsigned int three_minutes_delay_count = 3600;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
sbit run_flag at myFlags.B2;
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void main() {
       
    CMCON = 0x07;
    ANSEL = 0x00;
    TRISIO = 0x08;
    GPIO = 0x00;
    
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }   
    
    while(1) {
    
           Delay_ms(50);
           
           if((!SW) && (!button_state)){
               Delay_ms(50);
               if((!SW) && (!button_state)){
                  Turn_Off_Leds_And_Reset_Counters();
                  led_flag = 0;                  
                  button_state = 1;
                  run_flag = 1;
               }
           }
           else if((SW) && (button_state)) {
                  Delay_ms(50);
                  if((SW) && (button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 1;                      
                      button_state = 0;
                      run_flag = 1;
                  }
           }
           
           if(run_flag) {
               if(led_flag == 0) {
                   if(++blink_counter == 20) {
                        blink_counter = 0;
                        Yellow_Led = ~Yellow_Led;
                   }
                
                   if(++counter == ten_seconds_delay_count) {
                        counter = 0;
                        Green_Led = ON;
                        run_flag = 0;                                   
                   }
               }
               else if(led_flag == 1) {
                   if(++blink_counter == 20) {
                        blink_counter = 0;
                        Yellow_Led = ~Yellow_Led;
                   }
                   
                   if(++counter == three_minutes_delay_count) {
                        counter = 0;
                        Green_Led = ON;
                        run_flag = 0;                                   
                   }
               }              
           }
    }
}

uzzalpic · Nov 29, 2016

Okada said:
Here is the new project which uses delays instead of timer interrupts.

@andre_teprom

I had to post all project files without cleaning the project folder because if I clear the project folder of unnecessary files and then compile the code then projects (config) settings were changing to default.

Thanks boss, Its working.......

Now I want to add another red led for high volt and low volt signal. Suppose main line volt under 150v red led glow as low volt signal and over 240v red led glow as high volt signal. when red led will glow yellow led and green led will off and when main volt come back 151v to 239v yellow led will blinking then green led will glow after delay time. please help me about this.

Okada · Nov 29, 2016

This piece of code

Code C - [expand]
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if(++blink_counter == 20) {
                        blink_counter = 0;
                        Yellow_Led = ~Yellow_Led;
                   }

can be moved out of the

Code:

if(led_flag == 0) {

and 

if(led_flag == 1) {

This reduces code size.

- - - Updated - - -

That can be done but it will be a paid job. You can ask the question in EDA Jobs Section.

Use resistor before the bridge. You are converting 230V AC to DC and if anybody touches the output of bridge it will be dangerous.

How are you powering the PIC. If you are using power supply for PIC then you can use the output of power supply (unregulated) for measuring the mains voltage. It will be safer.

- - - Updated - - -

Here is the code.

0V input is 0V
5V input is 270V

If you scale the adc input voltage differently then change the multiplication factor in adc equation.

Code C - [expand]
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#define ON  1
#define OFF 0
 
#define OK    1
#define ERROR 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
sbit Red_Led at GP2_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
unsigned int raw_adc_value = 0, previous_raw_adc_value = 0;
double mains_voltage = 0.0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
sbit mains_status_flag at myFlags.B2;
 
//Timer1
//Prescaler 1:8; TMR1 Preload = 3036; Actual Interrupt Time : 500 ms
//Place/Copy this part in declaration section
void InitTimer1() {
    T1CON = 0x31;
    TMR1IF_bit = 0;
    TMR1H = 0x0B;
    TMR1L = 0xDC;    
    INTCON = 0xC0;    
}
 
void Interrupt() {
    if((TMR1IE_bit) && (TMR1IF_bit)) { 
        //Enter your code here        
        if(led_flag == 0) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
        
           if(++counter == ten_seconds_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        else if(led_flag == 1) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
           
           if(++counter == three_minutes_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        
        TMR1IF_bit = 0;
        TMR1H = 0x0B;
        TMR1L = 0xDC;        
    }
}
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void Enable_Timer1_Interrupts() {
    TMR1IE_bit = 1;
}
 
void main() {
       
    CMCON = 0x07;
    ANSEL = 0x51;
    ADCON0 = 0x80;    
    TRISIO = 0x09;
    GPIO = 0x00;
    
    InitTimer1();
    
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }
    
    while(1) {
    
           raw_adc_value = ADC_Read(0);
           Delay_us(15);
           
           if(previous_raw_adc_value != raw_adc_value) {
                mains_voltage = (double)raw_adc_value * 270.0 / 1023.0;
                
                if(mains_voltage < 150.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;
                      Turn_Off_Leds_And_Reset_Counters();
                }
                else if(mains_voltage > 240.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;
                      Turn_Off_Leds_And_Reset_Counters();
                }
                else {
                      Red_Led = OFF;
                      mains_status_flag = OK;
                }
           
                previous_raw_adc_value = raw_adc_value;
           }    
    
           if(mains_status_flag == OK) {
               if((!SW) && (!button_state)){
                   Delay_ms(50);
                   if((!SW) && (!button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 0;                  
                      Enable_Timer1_Interrupts();
                      button_state = 1;
                   }
               }
               else if((SW) && (button_state)) {
                      Delay_ms(50);
                      if((SW) && (button_state)){
                          Turn_Off_Leds_And_Reset_Counters();
                          led_flag = 1;
                          Enable_Timer1_Interrupts();
                          button_state = 0;
                      }
               }
           }
    }
}

- - - Updated - - -

This code is correct but it is not working in Proteus. Debugged the code for different adc values in mikroC PRO PIC Simulator and it works fine.

Use the attached Proteus file and Schematic.

Code C - [expand]
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#define ON  1
#define OFF 0
 
#define OK    1
#define ERROR 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
sbit Red_Led at GP2_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
unsigned int raw_adc_value = 0, previous_raw_adc_value = 400;
double mains_voltage = 0.0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
sbit mains_status_flag at myFlags.B2;
sbit run_once_flag at myFlags.B3;
 
//Timer1
//Prescaler 1:8; TMR1 Preload = 3036; Actual Interrupt Time : 500 ms
//Place/Copy this part in declaration section
void InitTimer1() {
    T1CON = 0x31;
    TMR1IF_bit = 0;
    TMR1H = 0x0B;
    TMR1L = 0xDC;    
    INTCON = 0xC0;    
}
 
void Interrupt() {
    if((TMR1IE_bit) && (TMR1IF_bit)) { 
        //Enter your code here        
        if(led_flag == 0) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
        
           if(++counter == ten_seconds_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        else if(led_flag == 1) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
           
           if(++counter == three_minutes_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        
        TMR1IF_bit = 0;
        TMR1H = 0x0B;
        TMR1L = 0xDC;        
    }
}
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void Enable_Timer1_Interrupts() {
    TMR1IE_bit = 1;
}
 
void main() {
    
    asm clrwdt
    OPTION_REG = 0x8F;
       
    CMCON = 0x07;
    ANSEL = 0x51;
    ADCON0 = 0x80;    
    TRISIO = 0x09;
    GPIO = 0x00;
    
    InitTimer1();
    
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }
    
    run_once_flag = 0;
    
    while(1) {
    
           asm clrwdt
    
           raw_adc_value = (unsigned int)ADC_Read(0);
           Delay_us(20);
           
           if(previous_raw_adc_value != raw_adc_value) {
                mains_voltage = (double)raw_adc_value * 288.5 / 1023.0;
                
                if(mains_voltage <= 150.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= 240.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }
                else {
                      Red_Led = OFF;
                      mains_status_flag = 1;
                      
                      if(run_once_flag == 1) {
                         run_once_flag = 0;
                      }                      
                }
                
                if((mains_status_flag == ERROR) && (run_once_flag == 0)) {
                    Turn_Off_Leds_And_Reset_Counters();
                    run_once_flag = 1;
                }
           
                previous_raw_adc_value = raw_adc_value;
           }    
                          
           if(mains_status_flag == OK) {
               if((!SW) && (!button_state)){
                   Delay_ms(50);
                   if((!SW) && (!button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 0;                  
                      Enable_Timer1_Interrupts();
                      button_state = 1;
                   }
               }
               else if((SW) && (button_state)) {
                      Delay_ms(50);
                      if((SW) && (button_state)){
                          Turn_Off_Leds_And_Reset_Counters();
                          led_flag = 1;
                          Enable_Timer1_Interrupts();
                          button_state = 0;
                      }
               }
           }
    }
}

Fixed the code. It is working now. Mistake was in Proteus file. Had not labelled the ADC connection. Use only

PIC12F675 Based LED and Switch Project - Using Timer Interrupt - RevD.rar

Discard all previous files.

Code C - [expand]
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#define ON  1
#define OFF 0
 
#define OK    1
#define ERROR 0
 
sbit SW at GP3_bit;
 
sbit Yellow_Led at GP5_bit;
sbit Green_Led at GP4_bit;
sbit Red_Led at GP2_bit;
 
unsigned char ten_seconds_delay_count = 20;
unsigned int three_minutes_delay_count = 360;
unsigned int counter = 0, blink_counter = 0;
unsigned char myFlags = 0;
unsigned int raw_adc_value = 0, previous_raw_adc_value = 400;
double mains_voltage = 0.0;
 
sbit led_flag at myFlags.B0;
sbit button_state at myFlags.B1;
sbit mains_status_flag at myFlags.B2;
sbit run_once_flag at myFlags.B3;
 
//Timer1
//Prescaler 1:8; TMR1 Preload = 3036; Actual Interrupt Time : 500 ms
//Place/Copy this part in declaration section
void InitTimer1() {
    T1CON = 0x31;
    TMR1IF_bit = 0;
    TMR1H = 0x0B;
    TMR1L = 0xDC;    
    INTCON = 0xC0;    
}
 
void Interrupt() {
    if((TMR1IE_bit) && (TMR1IF_bit)) { 
        //Enter your code here        
        if(led_flag == 0) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
        
           if(++counter == ten_seconds_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        else if(led_flag == 1) {
           if(++blink_counter == 2) {
                blink_counter = 0;
                Yellow_Led = ~Yellow_Led;
           }
           
           if(++counter == three_minutes_delay_count) {
                counter = 0;
                Green_Led = ON;
                TMR1ON_bit = 0;                
           }
        }
        
        TMR1IF_bit = 0;
        TMR1H = 0x0B;
        TMR1L = 0xDC;        
    }
}
 
void Turn_Off_Leds_And_Reset_Counters() {
    Yellow_Led = OFF;
    Green_Led = OFF;
    counter = 0;
    blink_counter = 0;
}
 
void Enable_Timer1_Interrupts() {
    TMR1IE_bit = 1;
}
 
void main() {
    
    asm clrwdt
    OPTION_REG = 0x8F;
       
    CMCON = 0x07;
    ANSEL = 0x51;
    ADCON0 = 0x80;    
    TRISIO = 0x09;
    GPIO = 0x00;
    
    InitTimer1();
        
    if(!SW) {
       Delay_ms(50);
       if(!SW) {
          button_state = 0;
       }
    }
    else if(SW) {
       Delay_ms(50);
       if(SW) {
          button_state = 1;
       }
    }    
    
    run_once_flag = 0;
    
    while(1) {
    
           asm clrwdt
    
           raw_adc_value = (unsigned int)ADC_Read(0);
           Delay_us(20);
           
           if(previous_raw_adc_value != raw_adc_value) {
                mains_voltage = (double)raw_adc_value * 288.5 / 1023.0;
                
                if(mains_voltage <= 150.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= 240.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }
                else {
                      Red_Led = OFF;
                      mains_status_flag = OK;
                      
                      if(run_once_flag == 1) {
                         run_once_flag = 0;
                         Turn_Off_Leds_And_Reset_Counters();
                         Enable_Timer1_Interrupts();
                      }                      
                }
                
                if((mains_status_flag == ERROR) && (run_once_flag == 0)) {
                    Turn_Off_Leds_And_Reset_Counters();
                    run_once_flag = 1;
                    TMR1IE_bit = 0;
                }
           
                previous_raw_adc_value = raw_adc_value;
           }    
                          
           if(mains_status_flag == OK) {
               if((!SW) && (!button_state)){
                   Delay_ms(50);
                   if((!SW) && (!button_state)){
                      Turn_Off_Leds_And_Reset_Counters();
                      led_flag = 0;                  
                      Enable_Timer1_Interrupts();
                      button_state = 1;
                   }
               }
               else if((SW) && (button_state)) {
                      Delay_ms(50);
                      if((SW) && (button_state)){
                          Turn_Off_Leds_And_Reset_Counters();
                          led_flag = 1;
                          Enable_Timer1_Interrupts();
                          button_state = 0;
                      }
               }
           }
    }
}

- - - Updated - - -

Final file. Timer Interrupt based RevD file.

- - - Updated - - -

Completed project. Tested and working.

Moved this piece of code

Code:

if(++blink_counter == 2) {
    blink_counter = 0;
    Yellow_Led = ~Yellow_Led;
}

outside the

Code:

if()
else if()

conditions inside the ISR.

There is only 15% ROM free and so if you need more features then you have to change the PIC and it has to be a paid job.

- - - Updated - - -

Proteus Simulation Videos.

Okada · Nov 30, 2016

Replaced the

Code:

Delay_ms(50);

function calls with

Code:

Debounce();

and this increased the free ROM from 15% to 17% that is 21 bytes was saved.

Okada · Nov 30, 2016

Replaced

Code:

if(mains_voltage <= 150.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= 240.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }

with

Code:

if(mains_voltage <= LOW_VOLTAGE_LIMIT ) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= HIGH_VOLTAGE_LIMIT ) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }

Now Lower and higher voltage limits can be changed easily in the #defines.

uzzalpic · Nov 30, 2016

Okada said:

Replaced

Code:

if(mains_voltage <= 150.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= 240.0) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }

with

Code:

if(mains_voltage <= LOW_VOLTAGE_LIMIT ) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                            
                }
                else if(mains_voltage >= HIGH_VOLTAGE_LIMIT ) {
                      Red_Led = ON;
                      mains_status_flag = ERROR;                                           
                }

Now Lower and higher voltage limits can be changed easily in the #defines.

Not working properly. I want when main voltage will under 150v or over 240v then red led glow as hi or low volt if main voltage stay in 151v to 239v green led will glow .

swapan · Dec 1, 2016

Instead of snapshot post the entire schematic.

Okada · Dec 1, 2016

He is actually making a stabilizer circuit. (reverse engineering stabilizer). Maybe his adc interface circuit is different. In my circuit 5V adc voltage represents 288V AC.

- - - Updated - - -

This is the circuit I have used. It works fine for me. If it is not working for you then you have to show the adc interface circuit. Then only the adc equation has to be changed in my code.

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