-
Notifications
You must be signed in to change notification settings - Fork 0
/
delay.c
46 lines (38 loc) · 790 Bytes
/
delay.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
#include "delay.h"
#include <avr/io.h>
#ifdef RUN_TASKS
extern void RunTasks(void);
#endif
#ifndef F_CPU
#warning F_CPU not defined
#elif (F_CPU<2020000)
#define T_PRESCALER 8
#elif (F_CPU<16200000)
#define T_PRESCALER 64
#else
#define T_PRESCALER 256
#endif
#define TIKS_1MS (F_CPU/T_PRESCALER/1000)
void timerDelayInit(void)
{
#if (T_PRESCALER==8)
TCCR0 = (1<<CS01); // prescaler = 8
#elif (T_PRESCALER==64)
TCCR0 = (1<<CS01) | (1<<CS00); // prescaler = 64
#elif (T_PRESCALER==256)
TCCR0 = (1<<CS02); // prescaler = 256
#else
#warning T_PRESCALER not defined
#endif
}
void timerDelayMs(unsigned long int ms)
{
while(ms--){
TCNT0 = 0;
while(TCNT0 < TIKS_1MS) {
#ifdef RUN_TASKS
RunTasks();
#endif
}
}
}