1 /*---------------------------------------------------------------------------- 2 * RL-ARM - RTX 3 *---------------------------------------------------------------------------- 4 * Name: RTX_EX2.C 5 * Purpose: RTX example program 6 *---------------------------------------------------------------------------- 7 * 8 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH 9 * All rights reserved. 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions are met: 12 * - Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * - Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * - Neither the name of ARM nor the names of its contributors may be used 18 * to endorse or promote products derived from this software without 19 * specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 *---------------------------------------------------------------------------*/ 33 34 #include "cmsis_os.h" 35 36 volatile uint16_t counter; /* counter for main thread */ 37 volatile uint16_t counter1; /* counter for thread 1 */ 38 volatile uint16_t counter2; /* counter for thread 2 */ 39 volatile uint16_t counter3; /* counter for thread 3 */ 40 41 /* Thread IDs */ 42 osThreadId thread1_id; 43 osThreadId thread2_id; 44 osThreadId thread3_id; 45 46 /* Forward reference */ 47 void job1 (void const *argument); 48 void job2 (void const *argument); 49 void job3 (void const *argument); 50 51 /* Thread definitions */ 52 osThreadDef(job1, osPriorityAboveNormal, 1, 0); 53 osThreadDef(job2, osPriorityNormal, 1, 0); 54 osThreadDef(job3, osPriorityNormal, 1, 0); 55 56 /*---------------------------------------------------------------------------- 57 * Thread 1: 'job1' 58 *---------------------------------------------------------------------------*/ 59 void job1 (void const *argument) { /* higher priority to preempt job2 */ 60 while (1) { /* endless loop */ 61 counter1++; /* increment counter 1 */ 62 osDelay(10); /* wait for timeout: 10ms */ 63 } 64 } 65 66 /*---------------------------------------------------------------------------- 67 * Thread 2: 'job2' 68 *---------------------------------------------------------------------------*/ 69 void job2 (void const *argument) { 70 while (1) { /* endless loop */ 71 counter2++; /* increment counter 2 */ 72 if (counter2 == 0) { /* signal overflow of counter 2 */ 73 osSignalSet(thread3_id, 0x0001);/* to thread 3 */ 74 osThreadYield(); 75 } 76 } 77 } 78 79 /*---------------------------------------------------------------------------- 80 * Thread 3: 'job3' 81 *---------------------------------------------------------------------------*/ 82 void job3 (void const *argument) { 83 while (1) { /* endless loop */ 84 osSignalWait(0x0001, osWaitForever); /* wait for signal event */ 85 counter3++; /* process overflow from counter 2 */ 86 } 87 } 88 89 /*---------------------------------------------------------------------------- 90 * Main Thread 91 *---------------------------------------------------------------------------*/ 92 int main (void) { /* program execution starts here */ 93 94 /* Set higher priority of main thread to preempt job2 */ 95 osThreadSetPriority(osThreadGetId(), osPriorityAboveNormal); 96 97 thread1_id = osThreadCreate(osThread(job1),NULL); /* create thread1 */ 98 thread2_id = osThreadCreate(osThread(job2),NULL); /* create thread2 */ 99 thread3_id = osThreadCreate(osThread(job3),NULL); /* create thread3 */ 100 101 while (1) { /* endless loop */ 102 counter++; /* increment counter */ 103 osDelay(5); /* wait for timeout: 5ms */ 104 } 105 } 106 107 /*---------------------------------------------------------------------------- 108 * end of file 109 *---------------------------------------------------------------------------*/