forked from ic11b025/wetterstation
-
Notifications
You must be signed in to change notification settings - Fork 0
/
writeLED.c
103 lines (85 loc) · 1.81 KB
/
writeLED.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
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
#include <wiringPi.h>
#include <stdio.h>
#include <pthread.h>
#include <time.h>
#include "common.h"
int LED_mode = 0;
pthread_t thread;
/* 1 - red fast blinking - very low
* 2 - red slowly blinking - low
* 3 - red green alternating slowly - normal
* 4 - green slowly blinking - high
* 5 - green fast blinking - very high
* everything else: red and green simultansously blinking - ERROR
*/
void* LED_output() {
while (1) {
switch (LED_mode) {
case 1:
pinMode(2,OUTPUT);
digitalWrite(2,1);
doSleep(0,250000000);
digitalWrite(2,0);
doSleep(0,250000000);
break;
case 2:
pinMode(2,OUTPUT);
digitalWrite(2,1);
doSleep(0,500000000);
digitalWrite(2,0);
doSleep(0,250000000);
break;
case 3:
pinMode(0,OUTPUT);
pinMode(2,OUTPUT);
digitalWrite(0,1);
doSleep(0,500000000);
digitalWrite(0,0);
doSleep(0,500000000);
digitalWrite(2,1);
doSleep(0,500000000);
digitalWrite(2,0);
doSleep(0,500000000);
break;
case 4:
pinMode(0,OUTPUT);
digitalWrite(0,1);
doSleep(0,250000000);
digitalWrite(0,0);
doSleep(0,250000000);
break;
case 5:
pinMode(0,OUTPUT);
digitalWrite(0,1);
doSleep(0,500000000);
digitalWrite(0,0);
doSleep(0,250000000);
break;
default: /*signaling ERROR*/
pinMode(3,OUTPUT);
digitalWrite(3,1);
doSleep(0,750000000);
digitalWrite(3,0);
doSleep(0,250000000);
break;
}
}
return 0;
}
extern void writeLED(uint8_t mode) {
int x = -1;
const char FNAME[] = "writeLED()";
/* start thread only if mode has changed */
if (mode != LED_mode) {
if (mode != 0) {
pinMode(0,OUTPUT);
pinMode(2,OUTPUT);
digitalWrite(0,0);
digitalWrite(2,0);
pthread_cancel(thread); /* cancel old thread*/
}
LED_mode = mode;
x = pthread_create(&thread, NULL, &LED_output, NULL);
if (x != 0) fprintf (stderr, "%s: Thread for LED_output did not start\n", FNAME);
}
}