Created
November 8, 2019 09:29
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LED点滅生成用のコード
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#include <avr/io.h> | |
#include <stdio.h> | |
#include <avr/sleep.h> | |
#include <avr/interrupt.h> | |
#include <math.h> | |
#define F_CPU 20000000UL | |
//#define INTERVAL_TIME 1 //ms | |
#define CENTRAL_FREQ 8 //Hz | |
#define MODULATION_FREQ 1//Hz | |
#define MODULATION_DEPTH 1 | |
unsigned int _segment=0; | |
float _modArray[1000] = {}; //追加したfloat配列(4Byte*1000 = 4KB) | |
ISR(TIMER0_COMPA_vect){ | |
_segment++; | |
float t = _segment*0.001; | |
float modulationWave=MODULATION_DEPTH*sin(2*M_PI*MODULATION_FREQ*t); | |
float val=cos((2*M_PI*CENTRAL_FREQ*t)+modulationWave); | |
if(val>0.95){ | |
PORTB=0xff; | |
PORTD=0x01; | |
}else{ | |
PORTB=0x00; | |
PORTD=0x00; | |
} | |
if(_segment>=1000){ | |
_segment=0; | |
} | |
} | |
int main(void) | |
{ | |
_modArray[1] = 0; // 配列の使用が確定した時点でコンパイラがメモリ・オーバーフローを吐く | |
TCCR0A= 0b00000010; | |
TCCR0B = 0b00000100; | |
OCR0A = 77; | |
TIMSK0 = 0b00000010; | |
DDRB=0xff;//点滅コマンド | |
DDRD=0xff;//トリガ | |
PORTB=0xff; | |
PORTD=0x00; | |
sei(); | |
/* Replace with your application code */ | |
while (1) | |
{ | |
; | |
} | |
} | |
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