Shahariar
Published © GPL3+

Integrated Solar ChargeController, Inverter, PowerBank, Lamp

Microcontroller based Solar PV System's charge controller, inverter, PowerBank & LED lamp with menu-based navigation system on LCD display

IntermediateFull instructions provided12 hours24,699
Integrated Solar ChargeController, Inverter, PowerBank, Lamp

Things used in this project

Hardware components

Microchip Atmega8
×1
Buck Converter
×1
SparkFun LED - 3W Aluminum PCB (5 Pack, Warm White
×1
Nokia 5110 Display
×1
SparkFun Heat Sink
×1
SparkFun N-Channel MOSFET
×4
SparkFun P-Channel Mosfet
×1
Solar Panel 40 Watt or Less for 12 V system
×1
SparkFun Lithium Ion Battery - 18650 Cell
×1
DC-DC 0.9V-5V to USB Module 5V DC Boost Step-up Power Supply
×1
General Purpose Transistor NPN
General Purpose Transistor NPN
×1
12-0-12/220 Center Tapped Transformer
×1
1N4007 – High Voltage, High Current Rated Diode
1N4007 – High Voltage, High Current Rated Diode
×1
Male-Header 36 Position 1 Row- Long (0.1")
Male-Header 36 Position 1 Row- Long (0.1")
×1
Slide Switch
Slide Switch
×1
Pushbutton switch 12mm
SparkFun Pushbutton switch 12mm
×1
Arduino Proto Shield
Arduino Proto Shield
×1
Strip/Vero/Proto Board 8x11 cm
×1
Arduino UNO
Arduino UNO
×1
Arduino Nano R3
Arduino Nano R3
×1
Arduino Mega 2560
Arduino Mega 2560
×1
Low FW Voltage Schottky Diode 5822
×1
Capacitor 10 µF
Capacitor 10 µF
×1
Capacitor 100 nF
Capacitor 100 nF
×1

Software apps and online services

Arduino IDE
Arduino IDE
AutoDesk 123D

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Drill Motor
Hot glue gun (generic)
Hot glue gun (generic)

Story

Read more

Schematics

Circuit

Code

Single Tab Code

Arduino
#define PIN_SCE   12
#define PIN_RESET 13
#define PIN_DC    8
#define PIN_SDIN  7
#define PIN_SCLK  6

#define PIN_INVP  4
#define PIN_INVN  5


#define PIN_LOAD    9    // 12 v dc load
#define PIN_LAMP  10   // WHITE LED LIGHT
#define PIN_BATTPWM 11 // Drives PMOS for Ext BAtt Charging 

#define PIN_BATTint_Sense A2
#define PIN_SOLAR_Sense A0
#define PIN_BATText_Sense A3

#define ADC_VREF 2.695  // internal ref voltage, around 1.11V for Arduino Uno aka Atmega328P, here my Atmega8A gives this !
#define ADCVDIV_R1 22   // 22 K voltage divider lower Resistor
#define ADCVDIV_R2 175  // 175 K voltage divider upper Resistor

//const uint8_t  skulljoke[] PROGMEM ={2,} ;
// PIN 2 & 3 USED AS INTERRUPT SWITCH
// PIN 0 & 1 AS PROGRAMMING
// PIN RESET AS


#define LCD_C     LOW
#define LCD_D     HIGH

#define LCD_X     84
#define LCD_Y     48
uint8_t x=0;
uint8_t level=0;
uint8_t blinker=0; 
boolean Load_Auto_Enable=0;

float maxADC_Voltage=0.0;
float BattInt_Voltage=0.0;
float BattExt_Voltage=0.0;
float PV_Voltage=0.0;

volatile int y=0;
volatile uint8_t dp =0;
volatile uint8_t ds =0;
volatile boolean cycle=0;
volatile uint8_t cdc_level =0;


//int i;


void setup(void)
{
  LcdInitialise();
  LcdClear();
   LcdString("*ARDUBOY PV*");
   LcdString(" CONTROLLER,");
   LcdString("AC INVERTER,");
   LcdString("POWER BANK, ");
   LcdString("LAMP THING!!");
  delay(3000);
  analogReference(INTERNAL);
  maxADC_Voltage=(ADC_VREF/ADCVDIV_R1)*(ADCVDIV_R1+ADCVDIV_R2);
  
  pinMode(PIN_LOAD,OUTPUT);
  digitalWrite(PIN_LOAD,LOW);
  pinMode(2, INPUT_PULLUP);
  attachInterrupt(0, SW1, FALLING);// Interrupt for Swithc 1

  pinMode(3, INPUT_PULLUP);
  attachInterrupt(1, SW2, FALLING);// Interrupt for Swithc 2
  
}

void loop(void)
{
  
Get_ADCVal();
Context_Control();
Charging_Control();
Discharging_Control();
Load_Control();
LcdClear();;

}


///////////// ADC ///////////////
void Get_ADCVal(void)
{
int I=0;
int J=0;
int K=0;

for(x=0;x<20;x++)
  {
I=I+analogRead(PIN_BATTint_Sense);
J=J+analogRead(PIN_BATText_Sense);
K=K+analogRead(PIN_SOLAR_Sense);

  }
// average voltage  
BattInt_Voltage=I/20.0;
BattExt_Voltage=J/20.0;
PV_Voltage=K/20.0;

BattInt_Voltage=maxADC_Voltage*BattInt_Voltage/1023.0;
BattExt_Voltage=maxADC_Voltage*BattExt_Voltage/1023.0;
PV_Voltage=maxADC_Voltage*PV_Voltage/1023.0;


}


//////////// Display and Control //////////////


void Context_Control(void)
{ 
   if(ds==0)
  {show_menu();}
  
  if(ds==1 && dp == 0)
  {show_info(); delay(100);} //LcdClear();Get_ADCVal();}
///////////////////////Enters 1st Sub Menu////////////////////////////
  if(ds==1 && dp == 1)
  {
    level=1;
    dp=0;
    while(level==1)
    {
        int temp=ds;
   LcdClear(); show_load_ctrl();delay(250); 
    if (dp==0){ if(ds!=temp){Load_Auto_Enable=0;digitalWrite(PIN_LOAD,LOW);}}
     if (dp==1){if(ds!=temp){Load_Auto_Enable=0; digitalWrite(PIN_LOAD,HIGH);}}
      if (dp==2){ if(ds!=temp){Load_Auto_Enable=1;}}
       if (dp==3){show_load_ctrl();delay(250);level=0;dp=0;ds=0;}
    }
  }
//////////////////////Enters 2nd Sub Menu//////////////////////////////
if(ds==1 && dp == 2)
  {
    level=2;
    dp=0;
    while(level==2)
    { 
      int temp=ds;
 show_inv_ctrl();delay(250); LcdClear();
  if (dp==0){ if(ds!=temp){Timer1_Init();}}
     if (dp==1){ if(ds!=temp){Timer1_DeInit();}}
     if (dp==2){ if(ds!=temp){Timer1_DeInit();digitalWrite(PIN_INVP,1);digitalWrite(PIN_INVN,1);}}     
  if (dp==3){show_inv_ctrl();delay(250);level=0;dp=0;ds=0;}
  
    }
  }
 ///////////////////////////////////////////////////////// 
 ////////////////Enters 3rd Sub Menu/////////////////////////////
if(ds==1 && dp == 3)
  {
    level=3;
    dp=0;
    while(level==3)
    {
      int temp=ds;
      LcdClear(); show_led_ctrl();delay(250); 
  if (dp==0){blinker=0;if(ds!=temp) {if(y<=255){y=y+15;analogWrite(PIN_LAMP,y);}}}
  if (dp==1){blinker=0;if(ds!=temp) {if(y>=0){y=y-15;analogWrite(PIN_LAMP,y);}}}
  if (dp==2){if(ds!=temp) {blinker^=1;analogWrite(PIN_LAMP,127);delay(250);analogWrite(PIN_LAMP,0);}}
  if (dp==3){show_led_ctrl();delay(250);level=0;dp=0;ds=0;}
    }
  }
 /////////////////////////////////////////////////////////  
//  {show_inv_ctrl();}
//  {show_led_ctrl();}
//}
if(blinker==1)
{analogWrite(PIN_LAMP,0);}
delay(250);
if(blinker==1)
{analogWrite(PIN_LAMP,127);}


}
/////////////////////////// Menu Text to be shown on Nokia 5110 display ///////////////////

void show_menu(void)
{

LcdXY(0,dp);
LcdString("->");
LcdXY(15,0);
LcdString("Sys Info");
LcdXY(15,1);
LcdString("DC Load+");
LcdXY(15,2);
LcdString("AC Load~");
LcdXY(15,3);
LcdString("LED Lamp");
}

void show_info(void)
{
  
LcdXY(0,0);
LcdString("Bat_I=");
LcdNumtoString(BattInt_Voltage);
LcdString("v");
LcdXY(0,1);
LcdString("Bat_E=");
LcdNumtoString(BattExt_Voltage);
LcdString("v");
LcdXY(0,2);
LcdString("Sol_P=");
LcdNumtoString(PV_Voltage);
LcdString("v");
LcdXY(0,3);
if(BattExt_Voltage >8.0)
{LcdString("Batt Conn OK");}
else
{LcdString("Connect Batt");}


if (PV_Voltage > 10.5 && cdc_level!=3 && cdc_level!=0)
{LcdString("Charging:ON ");}
else
{LcdString("Charging:OFF");}

if (TCNT1 >=45535 )
{LcdString("Inverter:ON");}
else
{LcdString("Inverter:OFF");}




}

void show_load_ctrl(void)
{

LcdXY(0,dp);
LcdString("->");
LcdXY(15,0);
LcdString("Load Off");
LcdXY(15,1);
LcdString("Load On");
LcdXY(15,2);
LcdString("Load Auto");
LcdXY(15,3);
LcdString("Return");
LcdXY(0,4);
LcdString("Must Connect");
LcdString("12V DC Load");

}

void show_inv_ctrl(void)
{

LcdXY(0,dp);
LcdString("->");
LcdXY(15,0);
LcdString("AC Inv On");
LcdXY(15,1);
LcdString("AC Inv Off");
LcdXY(15,2);
LcdString("2XDC Load");
LcdXY(15,3);
LcdString("Return");
LcdXY(0,4);
LcdString("2XDC Load,NO");
LcdXY(0,5);
LcdString("TRANSFORMER!");



}


void show_led_ctrl(void)
{

LcdXY(0,dp);
LcdString("->");
LcdXY(15,0);
LcdString("LED ++");
LcdXY(15,1);
LcdString("LED --");
LcdXY(15,2);
LcdString("LED Blk");
LcdXY(15,3);
LcdString("Return");
LcdXY(0,4);
LcdString("LED DISABLEs");
LcdXY(0,5);
LcdString("When INVR On");



}
////////////// Interrupt ISRs //////////////

void SW1()
{

dp++;
if(dp>3){dp=0;}   
}

void SW2()
{

ds^=1;

} 

ISR(TIMER1_OVF_vect)          
{
  noInterrupts(); 
  TCNT1  = 45535; 
//  TCNT1  = 25535;
  cycle^=1;
  if(cycle==0);
  {
  digitalWrite(PIN_INVP,HIGH);
 delayMicroseconds(1);  // dead band
  digitalWrite(PIN_INVN,LOW);
 delayMicroseconds(1);
  }
  if(cycle==1)
  {
  digitalWrite(PIN_INVP,LOW);
 delayMicroseconds(1);  // dead band
  digitalWrite(PIN_INVN,HIGH);
 delayMicroseconds(1);
  }
    
  
  interrupts(); 
}


/////////////Nokia 5110 Functions //////////

static const byte ASCII[][5] =
{
{0x00, 0x00, 0x00, 0x00, 0x00} // 20
,{0x00, 0x00, 0x5f, 0x00, 0x00} // 21 !
,{0x00, 0x07, 0x00, 0x07, 0x00} // 22 "
,{0x14, 0x7f, 0x14, 0x7f, 0x14} // 23 #
,{0x24, 0x2a, 0x7f, 0x2a, 0x12} // 24 $
,{0x23, 0x13, 0x08, 0x64, 0x62} // 25 %
,{0x36, 0x49, 0x55, 0x22, 0x50} // 26 &
,{0x00, 0x05, 0x03, 0x00, 0x00} // 27 '
,{0x00, 0x1c, 0x22, 0x41, 0x00} // 28 (
,{0x00, 0x41, 0x22, 0x1c, 0x00} // 29 )
,{0x14, 0x08, 0x3e, 0x08, 0x14} // 2a *
,{0x08, 0x08, 0x3e, 0x08, 0x08} // 2b +
,{0x00, 0x50, 0x30, 0x00, 0x00} // 2c ,
,{0x08, 0x08, 0x08, 0x08, 0x08} // 2d -
,{0x00, 0x60, 0x60, 0x00, 0x00} // 2e .
,{0x20, 0x10, 0x08, 0x04, 0x02} // 2f /
,{0x3e, 0x51, 0x49, 0x45, 0x3e} // 30 0
,{0x00, 0x42, 0x7f, 0x40, 0x00} // 31 1
,{0x42, 0x61, 0x51, 0x49, 0x46} // 32 2
,{0x21, 0x41, 0x45, 0x4b, 0x31} // 33 3
,{0x18, 0x14, 0x12, 0x7f, 0x10} // 34 4
,{0x27, 0x45, 0x45, 0x45, 0x39} // 35 5
,{0x3c, 0x4a, 0x49, 0x49, 0x30} // 36 6
,{0x01, 0x71, 0x09, 0x05, 0x03} // 37 7
,{0x36, 0x49, 0x49, 0x49, 0x36} // 38 8
,{0x06, 0x49, 0x49, 0x29, 0x1e} // 39 9
,{0x00, 0x36, 0x36, 0x00, 0x00} // 3a :
,{0x00, 0x56, 0x36, 0x00, 0x00} // 3b ;
,{0x08, 0x14, 0x22, 0x41, 0x00} // 3c <
,{0x14, 0x14, 0x14, 0x14, 0x14} // 3d =
,{0x00, 0x41, 0x22, 0x14, 0x08} // 3e >
,{0x02, 0x01, 0x51, 0x09, 0x06} // 3f ?
,{0x32, 0x49, 0x79, 0x41, 0x3e} // 40 @
,{0x7e, 0x11, 0x11, 0x11, 0x7e} // 41 A
,{0x7f, 0x49, 0x49, 0x49, 0x36} // 42 B
,{0x3e, 0x41, 0x41, 0x41, 0x22} // 43 C
,{0x7f, 0x41, 0x41, 0x22, 0x1c} // 44 D
,{0x7f, 0x49, 0x49, 0x49, 0x41} // 45 E
,{0x7f, 0x09, 0x09, 0x09, 0x01} // 46 F
,{0x3e, 0x41, 0x49, 0x49, 0x7a} // 47 G
,{0x7f, 0x08, 0x08, 0x08, 0x7f} // 48 H
,{0x00, 0x41, 0x7f, 0x41, 0x00} // 49 I
,{0x20, 0x40, 0x41, 0x3f, 0x01} // 4a J
,{0x7f, 0x08, 0x14, 0x22, 0x41} // 4b K
,{0x7f, 0x40, 0x40, 0x40, 0x40} // 4c L
,{0x7f, 0x02, 0x0c, 0x02, 0x7f} // 4d M
,{0x7f, 0x04, 0x08, 0x10, 0x7f} // 4e N
,{0x3e, 0x41, 0x41, 0x41, 0x3e} // 4f O
,{0x7f, 0x09, 0x09, 0x09, 0x06} // 50 P
,{0x3e, 0x41, 0x51, 0x21, 0x5e} // 51 Q
,{0x7f, 0x09, 0x19, 0x29, 0x46} // 52 R
,{0x46, 0x49, 0x49, 0x49, 0x31} // 53 S
,{0x01, 0x01, 0x7f, 0x01, 0x01} // 54 T
,{0x3f, 0x40, 0x40, 0x40, 0x3f} // 55 U
,{0x1f, 0x20, 0x40, 0x20, 0x1f} // 56 V
,{0x3f, 0x40, 0x38, 0x40, 0x3f} // 57 W
,{0x63, 0x14, 0x08, 0x14, 0x63} // 58 X
,{0x07, 0x08, 0x70, 0x08, 0x07} // 59 Y
,{0x61, 0x51, 0x49, 0x45, 0x43} // 5a Z
,{0x00, 0x7f, 0x41, 0x41, 0x00} // 5b [
,{0x02, 0x04, 0x08, 0x10, 0x20} // 5c 
,{0x00, 0x41, 0x41, 0x7f, 0x00} // 5d ]
,{0x04, 0x02, 0x01, 0x02, 0x04} // 5e ^
,{0x40, 0x40, 0x40, 0x40, 0x40} // 5f _
,{0x00, 0x01, 0x02, 0x04, 0x00} // 60 `
,{0x20, 0x54, 0x54, 0x54, 0x78} // 61 a
,{0x7f, 0x48, 0x44, 0x44, 0x38} // 62 b
,{0x38, 0x44, 0x44, 0x44, 0x20} // 63 c
,{0x38, 0x44, 0x44, 0x48, 0x7f} // 64 d
,{0x38, 0x54, 0x54, 0x54, 0x18} // 65 e
,{0x08, 0x7e, 0x09, 0x01, 0x02} // 66 f
,{0x0c, 0x52, 0x52, 0x52, 0x3e} // 67 g
,{0x7f, 0x08, 0x04, 0x04, 0x78} // 68 h
,{0x00, 0x44, 0x7d, 0x40, 0x00} // 69 i
,{0x20, 0x40, 0x44, 0x3d, 0x00} // 6a j
,{0x7f, 0x10, 0x28, 0x44, 0x00} // 6b k
,{0x00, 0x41, 0x7f, 0x40, 0x00} // 6c l
,{0x7c, 0x04, 0x18, 0x04, 0x78} // 6d m
,{0x7c, 0x08, 0x04, 0x04, 0x78} // 6e n
,{0x38, 0x44, 0x44, 0x44, 0x38} // 6f o
,{0x7c, 0x14, 0x14, 0x14, 0x08} // 70 p
,{0x08, 0x14, 0x14, 0x18, 0x7c} // 71 q
,{0x7c, 0x08, 0x04, 0x04, 0x08} // 72 r
,{0x48, 0x54, 0x54, 0x54, 0x20} // 73 s
,{0x04, 0x3f, 0x44, 0x40, 0x20} // 74 t
,{0x3c, 0x40, 0x40, 0x20, 0x7c} // 75 u
,{0x1c, 0x20, 0x40, 0x20, 0x1c} // 76 v
,{0x3c, 0x40, 0x30, 0x40, 0x3c} // 77 w
,{0x44, 0x28, 0x10, 0x28, 0x44} // 78 x
,{0x0c, 0x50, 0x50, 0x50, 0x3c} // 79 y
,{0x44, 0x64, 0x54, 0x4c, 0x44} // 7a z
,{0x00, 0x08, 0x36, 0x41, 0x00} // 7b {
,{0x00, 0x00, 0x7f, 0x00, 0x00} // 7c |
,{0x00, 0x41, 0x36, 0x08, 0x00} // 7d }
,{0x10, 0x08, 0x08, 0x10, 0x08} // 7e 
,{0x78, 0x46, 0x41, 0x46, 0x78} // 7f 
};

void LcdCharacter(char character)
{
  LcdWrite(LCD_D, 0x00);
  for (int index = 0; index < 5; index++)
  {
    LcdWrite(LCD_D, ASCII[character - 0x20][index]);
  }
  LcdWrite(LCD_D, 0x00);
}

void LcdClear(void)
{
  for (int index = 0; index < LCD_X * LCD_Y / 8; index++)
  {
    LcdWrite(LCD_D, 0x00);
  }
}



void LcdInitialise(void)
{
  pinMode(PIN_SCE, OUTPUT);
  pinMode(PIN_RESET, OUTPUT);
  pinMode(PIN_DC, OUTPUT);
  pinMode(PIN_SDIN, OUTPUT);
  pinMode(PIN_SCLK, OUTPUT);
  digitalWrite(PIN_RESET, LOW);
  digitalWrite(PIN_RESET, HIGH);
  LcdWrite(LCD_C, 0x21 );  // LCD Extended Commands.
  LcdWrite(LCD_C, 0xA0 );  // Set LCD Vop (Contrast). //0xB1
  LcdWrite(LCD_C, 0x04 );  // Set Temp coefficent. //0x04
  LcdWrite(LCD_C, 0x14 );  // LCD bias mode 1:48. //0x13
  LcdWrite(LCD_C, 0x20 );  // LCD Basic Commands
  LcdWrite(LCD_C, 0x0C );  // LCD in normal mode.
}

void LcdString(char *characters)
{
  while (*characters)
  {
    LcdCharacter(*characters++);
  }
}

void LcdWrite(byte dc, byte data)
{
//  analogWrite(PIN_BL, 127);
  digitalWrite(PIN_DC, dc);
  digitalWrite(PIN_SCE, LOW);
  shiftOut(PIN_SDIN, PIN_SCLK, MSBFIRST, data);
  digitalWrite(PIN_SCE, HIGH);
}

void LcdXY(int x,int y)
{
  
    LcdWrite(LCD_C,0x80|x);
    LcdWrite(LCD_C,0x40|y);
}

void LcdNumtoString(float number)
{
  char string[8];
   LcdString(dtostrf(number,5,2, string));

}


////////////// Background Loop Control Functions //////////

// This codelet will automatically enable external load when Sun is Down using PV as Light Sensor
void Load_Control(void)
{
  if (Load_Auto_Enable == 1 && PV_Voltage < 4.5 && cdc_level > 0)
  {digitalWrite(PIN_LOAD,HIGH);}
   if (Load_Auto_Enable == 1 && PV_Voltage >10.5|| cdc_level==0)
  {digitalWrite(PIN_LOAD,LOW);}
  
}

void Charging_Control (void)

{
//  BattExt_Voltage Level 14.3 Charging off, 13.5 or below Charging on, 10.8 Load off, 12.5 Load on 

// this next condition prevenst the attemps of charging during night % night PV is 0 volt !
if (PV_Voltage > 10.5 && BattExt_Voltage >8.0)
{
if (BattExt_Voltage <= 12.5)
  {
    analogWrite(PIN_BATTPWM,255);
    cdc_level = 0;
  }
  
 if (BattExt_Voltage > 12.5 && BattExt_Voltage <=12.9)
  {
    analogWrite(PIN_BATTPWM,200);
    cdc_level = 1;
  }
  
 if (BattExt_Voltage > 12.9 && BattExt_Voltage <=13.3)
  {
    analogWrite(PIN_BATTPWM,160);
    cdc_level = 1;
  }
 if (BattExt_Voltage > 13.3 && BattExt_Voltage <=13.6)
  {
    analogWrite(PIN_BATTPWM,120);
    cdc_level = 2;
  }

 if (BattExt_Voltage > 13.6 && BattExt_Voltage <=13.9 && cdc_level == 2)
  {
    analogWrite(PIN_BATTPWM,80);
    cdc_level = 2;
  }
 if (BattExt_Voltage > 13.9 && BattExt_Voltage <=14.3 && cdc_level == 2)
  {
    analogWrite(PIN_BATTPWM,40);
    cdc_level = 2;
  }

// Over Voltage Lockout, while cdc_level is 3, NO Charging ! Charging Resumes when cdc is 2 which is below 13.5 v  
 if (BattExt_Voltage > 14.3 )
  {
    analogWrite(PIN_BATTPWM,0);
    cdc_level = 3;
  } 
}
else {analogWrite(PIN_BATTPWM,0);cdc_level = 3;}
}


/// Under voltage Lockout
void Discharging_Control (void)
{
if (BattExt_Voltage <= 10.8)
  {
        cdc_level = 0;
   {digitalWrite(PIN_LOAD,LOW);}
  Timer1_DeInit();
  
       
        
  }

}

/////////////// Timer 2 Functions //////////////

// This portion of the code is written in AVR style

void Timer1_Init(void)
{
  noInterrupts();   // disable all interrupts
    pinMode(PIN_INVP,OUTPUT);
    pinMode(PIN_INVN,OUTPUT);

    TCCR1A = 0;
    TCCR1B = 0;
    
    /*
   ========================================
    50 Hz AC means 20 ms Wave which is formed by 2, 10 ms Pulses from PIN_INVP and PIN_INVN pins
    so both this pin should toggle at 100 Hz !
    
    Now 100 Hz = .01 sec
    Arduino System Clock 16 MHz = 16000000 cycle
    in 0,01 sec we have 160000 cycles
    using prescaler of 8 (CS11) makes timer count 160000/8 = 20000 timer ticks
    Since the timer 2 is 16 bit Up Counter and it Overflows at 65635 value
    we need to start counting from 65535-20000 = from 45535 value upto 65535 
    
    thus TCNT1 starts at 45535 ..then tick tick tick ... 46000 .... 50000 .............. 65536  !!! Boom Timer Over Flow Interrupt and
    toggle the Inverter driving pins in ISR and start counting from 45535 Again !!! (This happens in the Background)
    
    
   ========================================
    */
    
  TCNT1  = 45535; 
  //TCNT1  = 25535;
    TCCR1B |= (1 << CS11);    // 8 prescaler 
    TIMSK |= (1 << TOIE1);  // enable timer compare interrupt
  interrupts();
}



void Timer1_DeInit(void)
{
  noInterrupts();   // disable all interrupts
  
    TCCR1A = 0;
    TCCR1B = 0;
    TCNT1  = 0; 
//    TIMSK &= (0 << TOIE1);  // disable timer compare interrupt

  digitalWrite(PIN_INVP,LOW);
  digitalWrite(PIN_INVN,LOW);
   interrupts();
}

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Shahariar

Shahariar

71 projects • 261 followers
"What Kills a 'Great life' is a 'Good Life', which is Living a Life Inside While Loop"

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