Led Matrix with LPC2148

 WAP to Display 'R' in LED Matrix: #include<lpc21xx.h> void delay(int a); int main() { PINSEL0=0x000000000; PINSEL1=0x000000000;    IO0DIR=0xffffffff;     while(1)     {                   IO0SET=(4063<<0);           delay(100);           IO0CLR=(4063<<0);           delay(1);        ...

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14 segment and16 segment using ARM

WAP to Display 'A' on 14 segment: #include<lpc21xx.h> //#include"delay.h" void delay(unsigned int c) {     unsigned int a; for(a=1;a<=60000;a++); } int main() { int i;   PINSEL0=0x00000000;     PINSEL1=0x00000000;     IO0DIR=0xffffffff;     while(1)    {     i=0; while(i<100) {        IO0SET=0x2633;     delay(100);     IO0CLR=0x2633;     delay(1);    ...

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I2C using AVR:

I2C using AVR: Program for AVR(MOSI): Master: #include<avr/io.h> #include<util/delay.h> void main() { DDRD=0xFF; while(1) { TWBR=0xFF; TWCR=(1<<TWEA)|(1<<TWSTA)|(1<<TWEN)|(1<<TWINT); while((TWCR&(1<<TWINT))==0); if((TWSR&0xF8)!=0x08) PORTD=0x01; TWDR=0x40; TWCR=(1<<TWINT)|(1<<TWEA)|(1<<TWEN); while((TWCR&(1<<TWINT))==0); if((TWSR&0xF8)!=0x18) PORTD=0x02; TWDR=0x55; TWCR=(1<<TWINT)|(1<<TWEA)|(1<<TWEN); while((TWCR&(1<<TWINT))==0); if((TWSR&0xF8)!=0x28) PORTD=0x03; while(1); } } Slave: #include<avr/io.h> #include<util/delay.h> void...

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SPI using AVR:

SPI using AVR: Program for SPI (MOSI): Master: #include<avr/io.h> #include<util/delay.h> void main() { DDRB=0xAC; SPCR=0x70; while(1) { SPDR=0xf0; while((SPSR&0x80)==0); } } Slave: #include<avr/io.h> #include<util/delay.h> void main() { DDRD=0xFF; //DDRB=0X40; SPCR=0x70; while(1) { while((SPSR&0x80)==0); PORTD=SPDR; } } Simulation...

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INTERRUPT using AVR:

Interrupts:An interrupt is an external or internal event that interrupts the microcontroller to inform it that a device needs its service.Interrupts vs. Polling • A single microcontroller can serve several devices. •There are two ways to do that: – interrupts – Polling. •The program which is associated with the interrupt is called the interrupt service routine (ISR) or interrupt handler.Steps in Executing an Interrupt:Finish current instruction and...

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TIMER using AVR

TIMER using AVR: AVR have 3 types of Timer. 1) Timer 0= 8 bit 2)  Timer1= 16 bit 3) Timer 2= 8 bit Program: 1 sec delay using Timer 0: #include<avr/io.h> #include<util/delay.h> void main() { int i; DDRD=0xFF; TCCR0=0x01; while(1) { for(i=0;i<5000;i++) { TCNT0=0x38; while((TIFR&0x01)==0); TIFR=0x01; } PORTD=~PORTD; } } Normal 0 false false false EN-US X-NONE X-NONE ...

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