1 /*
2 * Copyright (C) 2014 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holders nor the names of
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * 4. Any redistribution, use, or modification is done solely for
17 * personal benefit and not for any commercial purpose or for
18 * monetary gain.
19 *
20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Please inquire about commercial licensing options at
34 * [email protected]
35 *
36 */
37
38 #define BTSTACK_FILE__ "led_counter.c"
39
40 // *****************************************************************************
41 /* EXAMPLE_START(led_counter): Hello World - Blinking an LED without Bluetooth
42 *
43 * @text The example demonstrates how to provide a periodic timer to toggle an
44 * LED and send debug messages to the console as a minimal BTstack test.
45 */
46 // *****************************************************************************
47
48
49
50 #include <stdio.h>
51 #include "btstack.h"
52 #include "hal_led.h"
53
54 #define HEARTBEAT_PERIOD_MS 1000
55
56 static int counter = 0;
57 static btstack_timer_source_t heartbeat;
58
59 /* @section Periodic Timer Setup
60 *
61 * @text As timers in BTstack are single shot,
62 * the periodic counter is implemented by re-registering the timer source in the
63 * heartbeat handler callback function. Listing LEDToggler shows heartbeat handler
64 * adapted to periodically toggle an LED and print number of toggles.
65 */
66
67 /* LISTING_START(LEDToggler): Periodic counter */
heartbeat_handler(btstack_timer_source_t * ts)68 static void heartbeat_handler(btstack_timer_source_t *ts){
69 UNUSED(ts);
70
71 // increment counter
72 counter++;
73
74 // print and log
75 log_info("BTstack Counter %u", counter);
76 printf("BTstack counter %04u\n\r", counter);
77
78 // toggle LED
79 hal_led_toggle();
80
81 // re-register timer
82 btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
83 btstack_run_loop_add_timer(&heartbeat);
84 }
85 /* LISTING_END */
86
87 /* @section Main Application Setup
88 *
89 * @text Listing MainConfiguration shows main application code.
90 * It configures the heartbeat tier and adds it to the run loop.
91 */
92
93 /* LISTING_START(MainConfiguration): Setup heartbeat timer */
94 int btstack_main(int argc, const char * argv[]);
btstack_main(int argc,const char * argv[])95 int btstack_main(int argc, const char * argv[]){
96 (void)argc;
97 (void)argv;
98
99 // set one-shot timer
100 heartbeat.process = &heartbeat_handler;
101 btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
102 btstack_run_loop_add_timer(&heartbeat);
103
104 printf("Running...\n\r");
105 return 0;
106 }
107 /* LISTING_END */
108 /* EXAMPLE_END */
109