TeamGyro / mbed-rtos

OS2

Dependents:   GYRO_MPU6050 Bluetooth_Powered_Multimeter_Using_STM32F429_and_RTOS fyp

rtx/TARGET_CORTEX_M/rt_Robin.c@0:a7c449cd2d5a, 2020-02-03 (annotated)

Committer:
guilhemMBED
Date:
Mon Feb 03 13:41:14 2020 +0000
Revision:
0:a7c449cd2d5a
previous version;

Who changed what in which revision?

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guilhemMBED 0:a7c449cd2d5a 1 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 2 * CMSIS-RTOS - RTX
guilhemMBED 0:a7c449cd2d5a 3 *----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 4 * Name: RT_ROBIN.C
guilhemMBED 0:a7c449cd2d5a 5 * Purpose: Round Robin Task switching
guilhemMBED 0:a7c449cd2d5a 6 * Rev.: V4.79
guilhemMBED 0:a7c449cd2d5a 7 *----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 8 *
guilhemMBED 0:a7c449cd2d5a 9 * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
guilhemMBED 0:a7c449cd2d5a 10 * All rights reserved.
guilhemMBED 0:a7c449cd2d5a 11 * Redistribution and use in source and binary forms, with or without
guilhemMBED 0:a7c449cd2d5a 12 * modification, are permitted provided that the following conditions are met:
guilhemMBED 0:a7c449cd2d5a 13 * - Redistributions of source code must retain the above copyright
guilhemMBED 0:a7c449cd2d5a 14 * notice, this list of conditions and the following disclaimer.
guilhemMBED 0:a7c449cd2d5a 15 * - Redistributions in binary form must reproduce the above copyright
guilhemMBED 0:a7c449cd2d5a 16 * notice, this list of conditions and the following disclaimer in the
guilhemMBED 0:a7c449cd2d5a 17 * documentation and/or other materials provided with the distribution.
guilhemMBED 0:a7c449cd2d5a 18 * - Neither the name of ARM nor the names of its contributors may be used
guilhemMBED 0:a7c449cd2d5a 19 * to endorse or promote products derived from this software without
guilhemMBED 0:a7c449cd2d5a 20 * specific prior written permission.
guilhemMBED 0:a7c449cd2d5a 21 *
guilhemMBED 0:a7c449cd2d5a 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
guilhemMBED 0:a7c449cd2d5a 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
guilhemMBED 0:a7c449cd2d5a 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
guilhemMBED 0:a7c449cd2d5a 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
guilhemMBED 0:a7c449cd2d5a 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
guilhemMBED 0:a7c449cd2d5a 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
guilhemMBED 0:a7c449cd2d5a 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
guilhemMBED 0:a7c449cd2d5a 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
guilhemMBED 0:a7c449cd2d5a 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
guilhemMBED 0:a7c449cd2d5a 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
guilhemMBED 0:a7c449cd2d5a 32 * POSSIBILITY OF SUCH DAMAGE.
guilhemMBED 0:a7c449cd2d5a 33 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 34
guilhemMBED 0:a7c449cd2d5a 35 #include "rt_TypeDef.h"
guilhemMBED 0:a7c449cd2d5a 36 #include "RTX_Config.h"
guilhemMBED 0:a7c449cd2d5a 37 #include "rt_List.h"
guilhemMBED 0:a7c449cd2d5a 38 #include "rt_Task.h"
guilhemMBED 0:a7c449cd2d5a 39 #include "rt_Time.h"
guilhemMBED 0:a7c449cd2d5a 40 #include "rt_Robin.h"
guilhemMBED 0:a7c449cd2d5a 41 #include "rt_HAL_CM.h"
guilhemMBED 0:a7c449cd2d5a 42
guilhemMBED 0:a7c449cd2d5a 43 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 44 * Global Variables
guilhemMBED 0:a7c449cd2d5a 45 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 46
guilhemMBED 0:a7c449cd2d5a 47 struct OS_ROBIN os_robin;
guilhemMBED 0:a7c449cd2d5a 48
guilhemMBED 0:a7c449cd2d5a 49
guilhemMBED 0:a7c449cd2d5a 50 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 51 * Global Functions
guilhemMBED 0:a7c449cd2d5a 52 *---------------------------------------------------------------------------*/
guilhemMBED 0:a7c449cd2d5a 53
guilhemMBED 0:a7c449cd2d5a 54 /*--------------------------- rt_init_robin ---------------------------------*/
guilhemMBED 0:a7c449cd2d5a 55
guilhemMBED 0:a7c449cd2d5a 56 __weak void rt_init_robin (void) {
guilhemMBED 0:a7c449cd2d5a 57 /* Initialize Round Robin variables. */
guilhemMBED 0:a7c449cd2d5a 58 os_robin.task = NULL;
guilhemMBED 0:a7c449cd2d5a 59 os_robin.tout = (U16)os_rrobin;
guilhemMBED 0:a7c449cd2d5a 60 }
guilhemMBED 0:a7c449cd2d5a 61
guilhemMBED 0:a7c449cd2d5a 62 /*--------------------------- rt_chk_robin ----------------------------------*/
guilhemMBED 0:a7c449cd2d5a 63
guilhemMBED 0:a7c449cd2d5a 64 __weak void rt_chk_robin (void) {
guilhemMBED 0:a7c449cd2d5a 65 /* Check if Round Robin timeout expired and switch to the next ready task.*/
guilhemMBED 0:a7c449cd2d5a 66 P_TCB p_new;
guilhemMBED 0:a7c449cd2d5a 67
guilhemMBED 0:a7c449cd2d5a 68 if (os_robin.task != os_rdy.p_lnk) {
guilhemMBED 0:a7c449cd2d5a 69 /* New task was suspended, reset Round Robin timeout. */
guilhemMBED 0:a7c449cd2d5a 70 os_robin.task = os_rdy.p_lnk;
guilhemMBED 0:a7c449cd2d5a 71 os_robin.time = (U16)os_time + os_robin.tout - 1U;
guilhemMBED 0:a7c449cd2d5a 72 }
guilhemMBED 0:a7c449cd2d5a 73 if (os_robin.time == (U16)os_time) {
guilhemMBED 0:a7c449cd2d5a 74 /* Round Robin timeout has expired, swap Robin tasks. */
guilhemMBED 0:a7c449cd2d5a 75 os_robin.task = NULL;
guilhemMBED 0:a7c449cd2d5a 76 p_new = rt_get_first (&os_rdy);
guilhemMBED 0:a7c449cd2d5a 77 rt_put_prio ((P_XCB)&os_rdy, p_new);
guilhemMBED 0:a7c449cd2d5a 78 }
guilhemMBED 0:a7c449cd2d5a 79 }
guilhemMBED 0:a7c449cd2d5a 80
guilhemMBED 0:a7c449cd2d5a 81 /*----------------------------------------------------------------------------
guilhemMBED 0:a7c449cd2d5a 82 * end of file
guilhemMBED 0:a7c449cd2d5a 83 *---------------------------------------------------------------------------*/