Doubea Pierre / Mbed 2 deprecated HW3

Lab Checkoff

Dependencies:   SDFileSystem TextLCD mbed-rtos mbed wave_player FATFileSystem

mbed-rtos/rtx/rt_Robin.c@0:67dbd54e60d4, 2013-11-13 (annotated)

Committer:
doubster
Date:
Wed Nov 13 20:00:28 2013 +0000
Revision:
0:67dbd54e60d4
Lab Checkoff

Who changed what in which revision?

UserRevisionLine numberNew contents of line
doubster 0:67dbd54e60d4 1 /*----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 2 * RL-ARM - RTX
doubster 0:67dbd54e60d4 3 *----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 4 * Name: RT_ROBIN.C
doubster 0:67dbd54e60d4 5 * Purpose: Round Robin Task switching
doubster 0:67dbd54e60d4 6 * Rev.: V4.60
doubster 0:67dbd54e60d4 7 *----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 8 *
doubster 0:67dbd54e60d4 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
doubster 0:67dbd54e60d4 10 * All rights reserved.
doubster 0:67dbd54e60d4 11 * Redistribution and use in source and binary forms, with or without
doubster 0:67dbd54e60d4 12 * modification, are permitted provided that the following conditions are met:
doubster 0:67dbd54e60d4 13 * - Redistributions of source code must retain the above copyright
doubster 0:67dbd54e60d4 14 * notice, this list of conditions and the following disclaimer.
doubster 0:67dbd54e60d4 15 * - Redistributions in binary form must reproduce the above copyright
doubster 0:67dbd54e60d4 16 * notice, this list of conditions and the following disclaimer in the
doubster 0:67dbd54e60d4 17 * documentation and/or other materials provided with the distribution.
doubster 0:67dbd54e60d4 18 * - Neither the name of ARM nor the names of its contributors may be used
doubster 0:67dbd54e60d4 19 * to endorse or promote products derived from this software without
doubster 0:67dbd54e60d4 20 * specific prior written permission.
doubster 0:67dbd54e60d4 21 *
doubster 0:67dbd54e60d4 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
doubster 0:67dbd54e60d4 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
doubster 0:67dbd54e60d4 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
doubster 0:67dbd54e60d4 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
doubster 0:67dbd54e60d4 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
doubster 0:67dbd54e60d4 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
doubster 0:67dbd54e60d4 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
doubster 0:67dbd54e60d4 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
doubster 0:67dbd54e60d4 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
doubster 0:67dbd54e60d4 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
doubster 0:67dbd54e60d4 32 * POSSIBILITY OF SUCH DAMAGE.
doubster 0:67dbd54e60d4 33 *---------------------------------------------------------------------------*/
doubster 0:67dbd54e60d4 34
doubster 0:67dbd54e60d4 35 #include "rt_TypeDef.h"
doubster 0:67dbd54e60d4 36 #include "RTX_Config.h"
doubster 0:67dbd54e60d4 37 #include "rt_List.h"
doubster 0:67dbd54e60d4 38 #include "rt_Task.h"
doubster 0:67dbd54e60d4 39 #include "rt_Time.h"
doubster 0:67dbd54e60d4 40 #include "rt_Robin.h"
doubster 0:67dbd54e60d4 41 #include "rt_HAL_CM.h"
doubster 0:67dbd54e60d4 42
doubster 0:67dbd54e60d4 43 /*----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 44 * Global Variables
doubster 0:67dbd54e60d4 45 *---------------------------------------------------------------------------*/
doubster 0:67dbd54e60d4 46
doubster 0:67dbd54e60d4 47 struct OS_ROBIN os_robin;
doubster 0:67dbd54e60d4 48
doubster 0:67dbd54e60d4 49
doubster 0:67dbd54e60d4 50 /*----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 51 * Global Functions
doubster 0:67dbd54e60d4 52 *---------------------------------------------------------------------------*/
doubster 0:67dbd54e60d4 53
doubster 0:67dbd54e60d4 54 /*--------------------------- rt_init_robin ---------------------------------*/
doubster 0:67dbd54e60d4 55
doubster 0:67dbd54e60d4 56 __weak void rt_init_robin (void) {
doubster 0:67dbd54e60d4 57 /* Initialize Round Robin variables. */
doubster 0:67dbd54e60d4 58 os_robin.task = NULL;
doubster 0:67dbd54e60d4 59 os_robin.tout = (U16)os_rrobin;
doubster 0:67dbd54e60d4 60 }
doubster 0:67dbd54e60d4 61
doubster 0:67dbd54e60d4 62 /*--------------------------- rt_chk_robin ----------------------------------*/
doubster 0:67dbd54e60d4 63
doubster 0:67dbd54e60d4 64 __weak void rt_chk_robin (void) {
doubster 0:67dbd54e60d4 65 /* Check if Round Robin timeout expired and switch to the next ready task.*/
doubster 0:67dbd54e60d4 66 P_TCB p_new;
doubster 0:67dbd54e60d4 67
doubster 0:67dbd54e60d4 68 if (os_robin.task != os_rdy.p_lnk) {
doubster 0:67dbd54e60d4 69 /* New task was suspended, reset Round Robin timeout. */
doubster 0:67dbd54e60d4 70 os_robin.task = os_rdy.p_lnk;
doubster 0:67dbd54e60d4 71 os_robin.time = (U16)os_time + os_robin.tout - 1;
doubster 0:67dbd54e60d4 72 }
doubster 0:67dbd54e60d4 73 if (os_robin.time == (U16)os_time) {
doubster 0:67dbd54e60d4 74 /* Round Robin timeout has expired, swap Robin tasks. */
doubster 0:67dbd54e60d4 75 os_robin.task = NULL;
doubster 0:67dbd54e60d4 76 p_new = rt_get_first (&os_rdy);
doubster 0:67dbd54e60d4 77 rt_put_prio ((P_XCB)&os_rdy, p_new);
doubster 0:67dbd54e60d4 78 }
doubster 0:67dbd54e60d4 79 }
doubster 0:67dbd54e60d4 80
doubster 0:67dbd54e60d4 81 /*----------------------------------------------------------------------------
doubster 0:67dbd54e60d4 82 * end of file
doubster 0:67dbd54e60d4 83 *---------------------------------------------------------------------------*/
doubster 0:67dbd54e60d4 84
doubster 0:67dbd54e60d4 85