|
Last change
on this file since 18066 was 17632, checked in by dneise, 11 years ago |
|
whitespace changes, using global register
|
|
File size:
644 bytes
|
| Line | |
|---|
| 1 | #include "application.h"
|
|---|
| 2 | #include <avr/interrupt.h>
|
|---|
| 3 |
|
|---|
| 4 | // We use the global volatile register!
|
|---|
| 5 | // gVolReg.time_sec and
|
|---|
| 6 |
|
|---|
| 7 | void timer_init() {
|
|---|
| 8 | // TIMER2 is used as local clock:
|
|---|
| 9 | // configure timer 2
|
|---|
| 10 | TCCR2 = (1<<WGM21); // CTC Modus
|
|---|
| 11 | TCCR2 |= (1<<CS21) | (1<<CS20); // Prescaler 64 --> counts up every 8us
|
|---|
| 12 | OCR2 = 125-1; // --> output compare interrupt occurs every 125 x 8us = 1ms
|
|---|
| 13 | // Compare Interrupt erlauben
|
|---|
| 14 | TIMSK |= (1<<OCIE2);
|
|---|
| 15 | }
|
|---|
| 16 |
|
|---|
| 17 | ISR (TIMER2_COMP_vect) {
|
|---|
| 18 | if (gVolReg.time_ms < 999)
|
|---|
| 19 | ++gVolReg.time_ms;
|
|---|
| 20 | else {
|
|---|
| 21 | gVolReg.time_ms = 0;
|
|---|
| 22 | gVolReg.time_sec++;
|
|---|
| 23 | }
|
|---|
| 24 | }
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
