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/* test streaming sample data
* bluetooth
* TJR 141011
want: 1 second
16M / 1024 prescale =
*/
#include <stdlib.h>
#include <avr/io.h>
#include <avr/interrupt.h>
//include <avr/signal.h>
#include <avr/pgmspace.h>
#include <math.h>
#include "uart.h"
//#include "HardwareSerial.h"
#define SAMPLES 512
#ifndef F_CPU
#define F_CPU 16000000UL
#endif
#define UART_BAUD_RATE 57600
//unsigned char dd[SAMPLES]; // ram buffer
int enabled=0;
int loopCount=0;
int sample=0;
int main(void)
{
Serial.begin(57600);
//uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
DDRB |= (1 << 5); // port B bit 6 = arduino pin 13
PORTB = (1 << 5); //turn on to start
TCCR1B |= (1 << WGM12); // Configure timer 1 for CTC mode
TIMSK1 |= (1 << OCIE1A); // Enable CTC interrupt
OCR1A = 1562; // Set CTC compare value to 1Hz at 1MHz AVR clock, with a prescaler of 64
sei(); // Enable global interrupts
TCCR1B |= ((1<<CS10)|(1 << CS12)); // Set up timer at Fcpu/1024
//fill_sinewave();
unsigned int c;
/* while(1) {
c = uart_getc();
if (!( c & UART_NO_DATA ))
{
uart_putc( (unsigned char)c );
if ((unsigned char)c=="a") {
uart_puts_P("Welcome to electic");
enabled=1;
}
}
}
*/
}
ISR(TIMER1_COMPA_vect)
{
if (enabled) PORTB ^= (1 << 5);
}
/*
void fill_sinewave(){
float pi = 3.141592;
float fcnt=0;
float fd;
float dx=2 * pi / SAMPLES; // fill the 512 byte bufferarry
int bb;
http://www.johnhenryshammer.com/WOW2/pagesHowTo/atmelPage.php#index for (int i = 0; i <= (SAMPLES-1); i++){ // with 50 periods sinewawe
fd= 127*sin(fcnt); // fundamental tone
fcnt=fcnt+dx; // in the range of 0 to 2xpi and 1/512 increments
bb=127+fd; // add dc offset to sinewawe
dd[i]=bb; // write value into array
}
}
*/
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