summaryrefslogtreecommitdiff
path: root/command.c
blob: 7d8c515f099b1be3c09759214d7b4d52cdd47cf3 (plain)
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
#include <avr/io.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "controller.h"
#include "serial.h"

static void handle_set(char *buffer, uint16_t len)
{
	const char *error_msg = "ERR Invalid number for temperature\r\n";
	const char *error_msg2 = "ERR Temperature out of range.\r\n";
	const char *success_msg = "OK Temperature set.\r\n";
	const char *input;
	char *endptr;
	long temperature;

	if (len < 2) {
		serial_send(error_msg, strlen(error_msg), 0);
		return;
	}

	input = buffer + 1;
	temperature = strtol(input, &endptr, 10);
	if (input[0] == '\r' || input[0] == '\n' ||
			(endptr[0] != '\r' && endptr[0] != '\n')) {
		serial_send(error_msg, strlen(error_msg), 0);
		return;
	}

	if (controller_set(temperature)) {
		serial_send(error_msg2, strlen(error_msg2), 0);
		return;
	}

	serial_send(success_msg, strlen(success_msg), 0);
}

static void handle_off(char *buffer, uint16_t len)
{
	const char *success_msg = "OK Powered down.\r\n";
	
	controller_off();
	serial_send(success_msg, strlen(success_msg), 0);
}

static void handle_get(char *buffer, uint16_t len)
{
	char response[128];

	snprintf(response, sizeof(response), "OK t=%ld\r\n", controller_get());
	serial_send(response, strlen(response), 0);
}

uint16_t serial_rx_cb(char *buffer, uint16_t len)
{
	const char *error_msg = "ERR Unknown command\r\n";
	switch(buffer[len-1]) {
	case '\r':
	case '\n':
		serial_send("\r\n", 2, 0);
		break;
	default:
		/* If we didn't get a line break, just echo and return */
		serial_send(&buffer[len-1], 1, 0);
		return 0;
	}

	switch(buffer[0]) {
	case 's':
	case 'S':
		handle_set(buffer, len);
		break;
	case 'g':
	case 'G':
		handle_get(buffer, len);
		break;
	case 'o':
	case 'O':
		handle_off(buffer, len);
		break;
	default:
		serial_send(error_msg, strlen(error_msg), 0);
	}

	return len;
}