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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef DEBUG
#define DEBUG_LOG(e) printf("DEBUG: %s\n", e);
#else
#define DEBUG_LOG(e)
#endif
struct output_status {
char value[4];
float active_power;
float current;
float voltage;
float power_factor;
float energy_sum;
};
int parse_output(int id, struct output_status *ret);
void print_output(struct output_status *status);
int parse_output(int id, struct output_status *ret)
{
int done;
FILE *fp;
char filename[13] = {0};
if (id > 9 || id < 1) {
DEBUG_LOG("Output identifier greater out of range");
return 1;
}
snprintf(filename, 12, "/dev/power%d", id);
fp = fopen(filename, "r");
if (fp == NULL) {
DEBUG_LOG("Error opening output device");
return 1;
}
done = fscanf(fp, "%s %f\n %f\n %f\n %f\n %f",
ret->value, &ret->active_power,
&ret->current, &ret->voltage,
&ret->power_factor, &ret->energy_sum);
fclose(fp);
if (done != 6) {
DEBUG_LOG("parse_output did not receive enough fields");
return 1;
}
return 0;
}
void print_output(struct output_status *status)
{
printf("Value: %s\n", status->value);
printf("Active Power: %f\n", status->active_power);
printf("Current: %f\n", status->current);
printf("Voltage: %f\n", status->voltage);
printf("Power Factor: %f\n", status->power_factor);
printf("Energy Sum: %f\n", status->energy_sum);
}
int main(int argc, char **argv)
{
int ret;
int output;
struct output_status status;
memset(&status, 0, sizeof(status));
if (argc != 2) {
printf("Pass output number\n");
return 1;
}
output = atoi(argv[1]);
if (output > 9 || output <= 0) {
printf("Output out of range\n");
return 1;
}
if ((ret = parse_output(output, &status)) != 0) {
printf("Failed to parse output\n");
return 1;
}
print_output(&status);
return 0;
}
|
