Atmega128 타이머 참고

타이머에 관련된 것만 체크하면

mcu 클럭이 있고(외부 16Mhz X-TAL 혹은 내부8MHz 등)

TCNT 카운터용 타이머 클럭이 있습니다.

16Mhz를 프리스케일러를 사용해서 분주 시켜서 타이머 클럭을 만들고

그 클럭마다 1씩 TCNT가 증가합니다.

// TCCR0 FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00

// TCCR0=1:1/1, TCCR0=2:1/8, TCCR0=3:1/32, TCCR0=4:1/64, TCCR0=5:1/128, TCCR0=6:1/256, TCCR0=7:1/1024

//

// Compare Output Mode & Waveform Generation Mode

// TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 COM1C1 COM1C0 WGM11 WGM10

//

// TCCR1B ICNC1 ICES1 ? WGM13 WGM12 CS12 CS11 CS10

// TCCR1B=1:1/1, TCCR1B=2:1/8, TCCR1B=3:1/64, TCCR1B=4:1/256, TCCR1B=5:1/1024

//

// TIMSK OCIE2 TOIE2 TICIE1 OCIE1A OCIE1B TOIE1 OCIE0 TOIE0

// Compare Overflow InputCapture CompareA CompareB Overflow Compare Overflow

//=====================================================

// 타이머0 오버플로우 인터럽트

TCCR0=4; TCNT0=6; TIMSK=1; //16000000/ 64/250=1000Hz=1ms, (256-250)=6

TCCR0=5; TCNT0=131; TIMSK=1; //16000000/ 128/125=1000Hz=1ms, (256-125)=131

TCCR0=5; TCNT0=6; TIMSK=1; //16000000/ 128/250= 500Hz=2ms, (256-250)=6

TCCR0=6; TCNT0=6; TIMSK=1; //16000000/ 256/250= 250Hz=4ms, (256-250)=6

TCCR0=7; TCNT0=6; TIMSK=1; //16000000/1024/250=62.5Hz=16ms, (256-250)=6

// 타이머0 매치 인터럽트

TCCR0=0x0B; OCR0= 49; TIMSK=2; //16000000/ 32/(1+ 49)=10000Hz=100us

TCCR0=0x0C; OCR0=249; TIMSK=2; //16000000/ 64/(1+249)= 1000Hz=1ms

TCCR0=0x0D; OCR0=124; TIMSK=2; //16000000/ 128/(1+124)= 1000Hz=1ms

TCCR0=0x0D; OCR0=249; TIMSK=2; //16000000/ 128/(1+249)= 500Hz=2ms

TCCR0=0x0E; OCR0=249; TIMSK=2; //16000000/ 256/(1+249)= 250Hz=4ms

TCCR0=0x0F; OCR0=155; TIMSK=2; //16000000/1024/(1+155)= 100.16..Hz=9.984ms

TCCR0=0x0F; OCR0=249; TIMSK=2; //16000000/1024/(1+249)= 62.5Hz=16ms

// 타이머1 오버플로우 인터럽트

TCCR1B=1; TCNT1=49536; TIMSK=4; //16000000/ 1/16000=1000Hz=1ms, (65536-16000)=49536

TCCR1B=1; TCNT1=33536; TIMSK=4; //16000000/ 1/32000= 500Hz=2ms, (65536-32000)=33536

TCCR1B=2; TCNT1=63536; TIMSK=4; //16000000/ 8/ 2000=1000Hz=1ms, (65536- 2000)=63536

TCCR1B=2; TCNT1=61536; TIMSK=4; //16000000/ 8/ 4000= 500Hz=2ms, (65536- 4000)=61536

TCCR1B=2; TCNT1=45536; TIMSK=4; //16000000/ 8/10000= 200Hz=5ms, (65536-10000)=45536

TCCR1B=2; TCNT1=35536; TIMSK=4; //16000000/ 8/20000= 100Hz=10ms, (65536-20000)=35536

TCCR1B=4; TCNT1=59286; TIMSK=4; //16000000/256/ 6250= 10Hz=100ms,(65536- 6250)=59286

TCCR1B=4; TCNT1= 3036; TIMSK=4; //16000000/256/62500= 1Hz=1sec, (65536-62500)= 3036

// 타이머1 A매치 인터럽트

TCCR1B=0x09; OCR1A=1474; TIMSK=0x10; //14745600/ 1/(1+ 1474)=9997.01695Hz=100.02984us

TCCR1B=0x09; OCR1A=1599; TIMSK=0x10; //16000000/ 1/(1+ 1999)=10KHz=100us

TCCR1B=0x09; OCR1A=15999; TIMSK=0x10; //16000000/ 1/(1+15999)=1000Hz=1ms

TCCR1B=0x09; OCR1A=31999; TIMSK=0x10; //16000000/ 1/(1+31999)= 500Hz=2ms

TCCR1B=0x0A; OCR1A= 1999; TIMSK=0x10; //16000000/ 8/(1+ 1999)=1000Hz=1ms

TCCR1B=0x0A; OCR1A= 3999; TIMSK=0x10; //16000000/ 8/(1+ 3999)= 500Hz=2ms

TCCR1B=0x0A; OCR1A= 9999; TIMSK=0x10; //16000000/ 8/(1+ 9999)= 200Hz=5ms

TCCR1B=0x0A; OCR1A=19999; TIMSK=0x10; //16000000/ 8/(1+19999)= 100Hz=10ms

TCCR1B=0x0C; OCR1A= 6249; TIMSK=0x10; //16000000/256/(1+ 6249)= 10Hz=100ms

TCCR1B=0x0C; OCR1A=31249; TIMSK=0x10; //16000000/256/(1+31249)= 2Hz=500ms

TCCR1B=0x0C; OCR1A=62499; TIMSK=0x10; //16000000/256/(1+62499)=1Hz=1sec

// 타이머2 매치 인터럽트

TCCR2=0x0B; OCR2=249; TIMSK=0x80; //16000000/ 64/(1+249)=1000Hz=1ms