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 MATTHIAS 24 * RINGWALD 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 // ***************************************************************************** 39 /* EXAMPLE_START(led_counter): Hello World: blinking LED without Bluetooth 40 * 41 * @text The example demonstrates how to provide a periodic timer to toggle an 42 * LED and send debug messages to the console as a minimal BTstack test. 43 */ 44 // ***************************************************************************** 45 46 47 48 #include <stdint.h> 49 #include <stdio.h> 50 51 #include "btstack_run_loop.h" 52 #include "btstack_defines.h" 53 #include "hal_led.h" 54 55 #define HEARTBEAT_PERIOD_MS 1000 56 57 static int counter = 0; 58 static btstack_timer_source_t heartbeat; 59 60 /* @section Periodic Timer Setup 61 * 62 * @text As timers in BTstack are single shot, 63 * the periodic counter is implemented by re-registering the timer source in the 64 * heartbeat handler callback function. Listing LEDToggler shows heartbeat handler 65 * adapted to periodically toggle an LED and print number of toggles. 66 */ 67 68 /* LISTING_START(LEDToggler): Periodic counter */ 69 static void heartbeat_handler(btstack_timer_source_t *ts){ 70 UNUSED(ts); 71 72 // increment counter 73 char lineBuffer[30]; 74 sprintf(lineBuffer, "BTstack counter %04u\n\r", ++counter); 75 puts(lineBuffer); 76 77 // toggle LED 78 hal_led_toggle(); 79 80 // re-register timer 81 btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS); 82 btstack_run_loop_add_timer(&heartbeat); 83 } 84 /* LISTING_END */ 85 86 /* @section Main Application Setup 87 * 88 * @text Listing MainConfiguration shows main application code. 89 * It configures the heartbeat tier and adds it to the run loop. 90 */ 91 92 /* LISTING_START(MainConfiguration): Setup heartbeat timer */ 93 int btstack_main(int argc, const char * argv[]); 94 int btstack_main(int argc, const char * argv[]){ 95 (void)argc; 96 (void)argv; 97 98 // set one-shot timer 99 heartbeat.process = &heartbeat_handler; 100 btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS); 101 btstack_run_loop_add_timer(&heartbeat); 102 103 printf("Running...\n\r"); 104 return 0; 105 } 106 /* LISTING_END */ 107 /* EXAMPLE_END */