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Running LED

.

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unsigned char flash;

void setup() {DDRD = B11111111; //Port D as output

}

void loop() {

flash = B10000000;

for(int i = 0;i>=1;

}

} 3

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1. unsigned char flash; char flash;

2. flash>>=1; flash

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8x8 LED Dot Matrix

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5x7 LED Dot Matrix

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8x8 LED Dot Matrix Arduino

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Arduino

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Timer Counter ATMega168

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Timer1

ATMega168

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TCCR1A Timer/Counter 1 Control Register ATCCR1B Timer/Counter 1 Control Register BTCCR1C Timer/Counter 1 Control Register CTCNT1H Timer/Counter 1 High RegisterTCNT1L Timer/Counter 1 Low Register

OCR1AH Output Compare Register 1 A HighOCR1AL Output Compare Register 1 A LowOCR1BH Output Compare Register 1 B HighOCR1BL Output Compare Register 1 B LowICR1H Input Capture Register 1 HighICR1L Input Capture Register 1 Low

TIMSK1 Timer/Counter Interrupt Mask RegisterTIFR1 Timer/Counter Interrupt Flag Register

http://www.protostack.com/blog/2010/09/timer-interrupts-on-an-atmega168/

10

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Timer1Arduino

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Library timer 11.

http://www.arduino.cc/playground/code/timer1

LAB

2. Copy Mylibraries Sketch

Arduino \Arduino\libraries

11

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Libraries Timer1

Timer1.initialize(n);

timer 1 nmicroseconds n long

Timer1.attachInterrupt( timerIsr );

http://playground.arduino.cc/code/timer1

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http://playground.arduino.cc/code/timer1http://playground.arduino.cc/code/timer1http://playground.arduino.cc/code/timer1

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#include //TimerOne

unsigned char col;//const unsigned char pattern[] = {0xff,0x7e,0x3c,0x18,0x81,0x42,0x24,0x18};unsigned char dis_buf[8]; //

//--------------------------------------------------------------------------------

void setup() {DDRD = B11111111; //Port D as outputDDRC = B11111111; //Port C as outputDDRB = B11111111; //Port B as output

// timer 1 1000 microsecondsTimer1.initialize(1000);Timer1.attachInterrupt( timerIsr ); //

col = 0;copymem(pattern); //

}

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()

void copymem(const unsigned char image[]){int i;for (i=0;i

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()//--------------------------------------------------------------------------------

/// Scan display/// 1 //--------------------------------------------------------------------------------void timerIsr(){

switch (col) {case 0:PORTD = dis_buf[col];PORTC = 0B11111110;PORTB = 0B11111111;break;

case 1:PORTD = dis_buf[col];PORTC = 0B11111101;PORTB = 0B11111111;

break;case 2:PORTD = dis_buf[col];PORTC = 0B11111011;PORTB = 0B11111111;break;

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()

case 3:PORTD = dis_buf[col];PORTC = 0B11110111;PORTB = 0B11111111;break;

case 4:PORTD = dis_buf[col];PORTC = 0B11101111;PORTB = 0B11111111;break;

case 5:

PORTD = dis_buf[col];PORTC = 0B11011111;PORTB = 0B11111111;break;

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()

case 6:PORTD = dis_buf[col];PORTC = 0B11111111;PORTB = 0B11101111;break;

case 7:PORTD = dis_buf[col];PORTC = 0B11111111;PORTB = 0B11011111;break;

}col++;if (col > 7) col = 0;

}

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