issue regarding waveform generation with atmega16

[lokesh tiwari]

sir i want to generate 4 square waves at 4 saperate pins of atmega 16 MCU….for 250ms time period for each………….now tell me that how can i do it……………..

one more thing i studied the article on this wavesite(engineersgarage.com)named as waveform generation….bt at the time of compilation through avr studio4 it shows an error…..

may you plz check it and plz tell me that what is the error….and am i doing right?

my code is…

 

 

#include<avr/io.h>

#include<util/delay.h>

#include<avr/interrupt.h>

void t0_init(void);

 

#define FREQ 1000000 // crsytal freqeuncy

#define PRECSALER 1024

#define F_OUT 4 // output frequency

#define OCR0_VALUE ((((FREQ)/PRECSALER)/F_OUT)-1)

int main()

{

t0_init(); // timer initialize

sei(); // enable global interrupts

while(1);

}

 

void t0_init()

{

// WGM0[1:0]= 10, for CTC mode

// COM0[1:0]= 01, to toggle OC0 on compare match

// CS0[2:0] =010. for prescaler 8

 

TCCR0=(1<<WGM01)|(1<<COM00)|(1<<CS02)|(1<<CS00);

DDRB|=(1<<PB3);

DDRD|=(1<<PD4)|(1<<PD5)|(1<<PD7) // select as output pin 

TIMSK|=(1<<OCIE0); //enable output compare interrupt

}

 

ISR(TIMER0_COMP_vect) // interrupt subroutine

{

OCR0=(uint8_t)OCR0_VALUE; //put OCR value

}

 

 

 

and the error is………………

../demo1.c:26: error: called object ‘128’ is not a function

plz guide me plz

 

 

 

[AJISH ALFRED]

Can you please tell me whcih is your line number 26 in the .c file?

[Author]

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