ATMEGA128
ATMEGA128, CodeVisonAVR, TIMER, timer_compare_intr_1ms
CoyoteUgly
2018. 8. 30. 16:15
ATMEGA128, CodeVisonAVR, TIMER, timer_compare_intr_1ms
0. 참고 자료
1. 모듈
2. HW 구성
3. Ports > Bit0 out
LED Port
4. Timers > Timer0
5. SW 구성
#include <mega128.h>
// Timer 0 output compare interrupt service routine
interrupt [TIM0_COMP] void timer0_comp_isr(void)
{
// Place your code here
// 16MHz / 64 = 0.004ms
// 0.004ms * 250 = 1ms
PORTA ^= 0x01;
}
// Declare your global variables here
void main(void)
{
// Declare your local variables here
// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x01;
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: 16000.000 kHz
// Mode: CTC top=OCR0
// OC0 output: Disconnected
ASSR=0x00;
//TCCR0=0x09;
TCCR0 = // 64 prescaler
(0 << FOC0) | (0 << WGM00) | (0 << COM01) | (0 << COM00) |
(1 << WGM01) | (1 << CS02) | (0 << CS01) | (0 << CS00);
TCNT0=0x00;
OCR0=0xF9; // 249
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x02;
ETIMSK=0x00;
// Global enable interrupts
#asm("sei")
while (1)
{
// Place your code here
}
} |
6. 소스
7. 결과
1ms 마다 LED가 반응합니다.
