btstack/example/embedded/led_counter.c

/*
 * Copyright (C) 2014 BlueKitchen GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
 * 1. Redistributions of source code must retain the above copyright
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 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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// *****************************************************************************
//
// led_counter demo - uses the BTstack run loop to blink an LED
//
// *****************************************************************************

#include <stdint.h>
#include <stdio.h>

#include <btstack/run_loop.h>
#include <btstack/hal_led.h>

#define HEARTBEAT_PERIOD_MS 1000

static int counter = 0;
static timer_source_t heartbeat;
    
static void run_loop_register_timer(timer_source_t *timer, uint16_t period){
    run_loop_set_timer(timer, period);
    run_loop_add_timer(timer);
}

static void heartbeat_handler(timer_source_t *ts){
    // increment counter
    char lineBuffer[30];
    sprintf(lineBuffer, "BTstack counter %04u\n\r", ++counter);
    puts(lineBuffer);
    
    // toggle LED
    hal_led_toggle();

    // re-register timer
    run_loop_register_timer(ts, HEARTBEAT_PERIOD_MS);
} 

static void timer_setup(){
    // set one-shot timer
    heartbeat.process = &heartbeat_handler;
    run_loop_register_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
}

int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){

	timer_setup();
    
	printf("Run...\n\r");

    return 0;
}