V M / Mbed 2 deprecated NRF24L01_receiver

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Dependencies:   mbed nRF24L01P

mbed-rtos/rtx/rt_Semaphore.c@0:fdfe93cb9255, 2013-05-27 (annotated)

Committer:
vmihalcut
Date:
Mon May 27 06:06:31 2013 +0000
Revision:
0:fdfe93cb9255
NRF24L01 receiver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vmihalcut 0:fdfe93cb9255 1 /*----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 2 * RL-ARM - RTX
vmihalcut 0:fdfe93cb9255 3 *----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 4 * Name: RT_SEMAPHORE.C
vmihalcut 0:fdfe93cb9255 5 * Purpose: Implements binary and counting semaphores
vmihalcut 0:fdfe93cb9255 6 * Rev.: V4.60
vmihalcut 0:fdfe93cb9255 7 *----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 8 *
vmihalcut 0:fdfe93cb9255 9 * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
vmihalcut 0:fdfe93cb9255 10 * All rights reserved.
vmihalcut 0:fdfe93cb9255 11 * Redistribution and use in source and binary forms, with or without
vmihalcut 0:fdfe93cb9255 12 * modification, are permitted provided that the following conditions are met:
vmihalcut 0:fdfe93cb9255 13 * - Redistributions of source code must retain the above copyright
vmihalcut 0:fdfe93cb9255 14 * notice, this list of conditions and the following disclaimer.
vmihalcut 0:fdfe93cb9255 15 * - Redistributions in binary form must reproduce the above copyright
vmihalcut 0:fdfe93cb9255 16 * notice, this list of conditions and the following disclaimer in the
vmihalcut 0:fdfe93cb9255 17 * documentation and/or other materials provided with the distribution.
vmihalcut 0:fdfe93cb9255 18 * - Neither the name of ARM nor the names of its contributors may be used
vmihalcut 0:fdfe93cb9255 19 * to endorse or promote products derived from this software without
vmihalcut 0:fdfe93cb9255 20 * specific prior written permission.
vmihalcut 0:fdfe93cb9255 21 *
vmihalcut 0:fdfe93cb9255 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
vmihalcut 0:fdfe93cb9255 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
vmihalcut 0:fdfe93cb9255 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
vmihalcut 0:fdfe93cb9255 25 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
vmihalcut 0:fdfe93cb9255 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
vmihalcut 0:fdfe93cb9255 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
vmihalcut 0:fdfe93cb9255 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
vmihalcut 0:fdfe93cb9255 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
vmihalcut 0:fdfe93cb9255 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
vmihalcut 0:fdfe93cb9255 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
vmihalcut 0:fdfe93cb9255 32 * POSSIBILITY OF SUCH DAMAGE.
vmihalcut 0:fdfe93cb9255 33 *---------------------------------------------------------------------------*/
vmihalcut 0:fdfe93cb9255 34
vmihalcut 0:fdfe93cb9255 35 #include "rt_TypeDef.h"
vmihalcut 0:fdfe93cb9255 36 #include "RTX_Conf.h"
vmihalcut 0:fdfe93cb9255 37 #include "rt_System.h"
vmihalcut 0:fdfe93cb9255 38 #include "rt_List.h"
vmihalcut 0:fdfe93cb9255 39 #include "rt_Task.h"
vmihalcut 0:fdfe93cb9255 40 #include "rt_Semaphore.h"
vmihalcut 0:fdfe93cb9255 41 #include "rt_HAL_CM.h"
vmihalcut 0:fdfe93cb9255 42
vmihalcut 0:fdfe93cb9255 43
vmihalcut 0:fdfe93cb9255 44 /*----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 45 * Functions
vmihalcut 0:fdfe93cb9255 46 *---------------------------------------------------------------------------*/
vmihalcut 0:fdfe93cb9255 47
vmihalcut 0:fdfe93cb9255 48
vmihalcut 0:fdfe93cb9255 49 /*--------------------------- rt_sem_init -----------------------------------*/
vmihalcut 0:fdfe93cb9255 50
vmihalcut 0:fdfe93cb9255 51 void rt_sem_init (OS_ID semaphore, U16 token_count) {
vmihalcut 0:fdfe93cb9255 52 /* Initialize a semaphore */
vmihalcut 0:fdfe93cb9255 53 P_SCB p_SCB = semaphore;
vmihalcut 0:fdfe93cb9255 54
vmihalcut 0:fdfe93cb9255 55 p_SCB->cb_type = SCB;
vmihalcut 0:fdfe93cb9255 56 p_SCB->p_lnk = NULL;
vmihalcut 0:fdfe93cb9255 57 p_SCB->tokens = token_count;
vmihalcut 0:fdfe93cb9255 58 }
vmihalcut 0:fdfe93cb9255 59
vmihalcut 0:fdfe93cb9255 60
vmihalcut 0:fdfe93cb9255 61 /*--------------------------- rt_sem_delete ---------------------------------*/
vmihalcut 0:fdfe93cb9255 62
vmihalcut 0:fdfe93cb9255 63 #ifdef __CMSIS_RTOS
vmihalcut 0:fdfe93cb9255 64 OS_RESULT rt_sem_delete (OS_ID semaphore) {
vmihalcut 0:fdfe93cb9255 65 /* Delete semaphore */
vmihalcut 0:fdfe93cb9255 66 P_SCB p_SCB = semaphore;
vmihalcut 0:fdfe93cb9255 67 P_TCB p_TCB;
vmihalcut 0:fdfe93cb9255 68
vmihalcut 0:fdfe93cb9255 69 while (p_SCB->p_lnk != NULL) {
vmihalcut 0:fdfe93cb9255 70 /* A task is waiting for token */
vmihalcut 0:fdfe93cb9255 71 p_TCB = rt_get_first ((P_XCB)p_SCB);
vmihalcut 0:fdfe93cb9255 72 rt_ret_val(p_TCB, 0);
vmihalcut 0:fdfe93cb9255 73 rt_rmv_dly(p_TCB);
vmihalcut 0:fdfe93cb9255 74 p_TCB->state = READY;
vmihalcut 0:fdfe93cb9255 75 rt_put_prio (&os_rdy, p_TCB);
vmihalcut 0:fdfe93cb9255 76 }
vmihalcut 0:fdfe93cb9255 77
vmihalcut 0:fdfe93cb9255 78 if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
vmihalcut 0:fdfe93cb9255 79 /* preempt running task */
vmihalcut 0:fdfe93cb9255 80 rt_put_prio (&os_rdy, os_tsk.run);
vmihalcut 0:fdfe93cb9255 81 os_tsk.run->state = READY;
vmihalcut 0:fdfe93cb9255 82 rt_dispatch (NULL);
vmihalcut 0:fdfe93cb9255 83 }
vmihalcut 0:fdfe93cb9255 84
vmihalcut 0:fdfe93cb9255 85 p_SCB->cb_type = 0;
vmihalcut 0:fdfe93cb9255 86
vmihalcut 0:fdfe93cb9255 87 return (OS_R_OK);
vmihalcut 0:fdfe93cb9255 88 }
vmihalcut 0:fdfe93cb9255 89 #endif
vmihalcut 0:fdfe93cb9255 90
vmihalcut 0:fdfe93cb9255 91
vmihalcut 0:fdfe93cb9255 92 /*--------------------------- rt_sem_send -----------------------------------*/
vmihalcut 0:fdfe93cb9255 93
vmihalcut 0:fdfe93cb9255 94 OS_RESULT rt_sem_send (OS_ID semaphore) {
vmihalcut 0:fdfe93cb9255 95 /* Return a token to semaphore */
vmihalcut 0:fdfe93cb9255 96 P_SCB p_SCB = semaphore;
vmihalcut 0:fdfe93cb9255 97 P_TCB p_TCB;
vmihalcut 0:fdfe93cb9255 98
vmihalcut 0:fdfe93cb9255 99 if (p_SCB->p_lnk != NULL) {
vmihalcut 0:fdfe93cb9255 100 /* A task is waiting for token */
vmihalcut 0:fdfe93cb9255 101 p_TCB = rt_get_first ((P_XCB)p_SCB);
vmihalcut 0:fdfe93cb9255 102 #ifdef __CMSIS_RTOS
vmihalcut 0:fdfe93cb9255 103 rt_ret_val(p_TCB, 1);
vmihalcut 0:fdfe93cb9255 104 #else
vmihalcut 0:fdfe93cb9255 105 rt_ret_val(p_TCB, OS_R_SEM);
vmihalcut 0:fdfe93cb9255 106 #endif
vmihalcut 0:fdfe93cb9255 107 rt_rmv_dly (p_TCB);
vmihalcut 0:fdfe93cb9255 108 rt_dispatch (p_TCB);
vmihalcut 0:fdfe93cb9255 109 }
vmihalcut 0:fdfe93cb9255 110 else {
vmihalcut 0:fdfe93cb9255 111 /* Store token. */
vmihalcut 0:fdfe93cb9255 112 p_SCB->tokens++;
vmihalcut 0:fdfe93cb9255 113 }
vmihalcut 0:fdfe93cb9255 114 return (OS_R_OK);
vmihalcut 0:fdfe93cb9255 115 }
vmihalcut 0:fdfe93cb9255 116
vmihalcut 0:fdfe93cb9255 117
vmihalcut 0:fdfe93cb9255 118 /*--------------------------- rt_sem_wait -----------------------------------*/
vmihalcut 0:fdfe93cb9255 119
vmihalcut 0:fdfe93cb9255 120 OS_RESULT rt_sem_wait (OS_ID semaphore, U16 timeout) {
vmihalcut 0:fdfe93cb9255 121 /* Obtain a token; possibly wait for it */
vmihalcut 0:fdfe93cb9255 122 P_SCB p_SCB = semaphore;
vmihalcut 0:fdfe93cb9255 123
vmihalcut 0:fdfe93cb9255 124 if (p_SCB->tokens) {
vmihalcut 0:fdfe93cb9255 125 p_SCB->tokens--;
vmihalcut 0:fdfe93cb9255 126 return (OS_R_OK);
vmihalcut 0:fdfe93cb9255 127 }
vmihalcut 0:fdfe93cb9255 128 /* No token available: wait for one */
vmihalcut 0:fdfe93cb9255 129 if (timeout == 0) {
vmihalcut 0:fdfe93cb9255 130 return (OS_R_TMO);
vmihalcut 0:fdfe93cb9255 131 }
vmihalcut 0:fdfe93cb9255 132 if (p_SCB->p_lnk != NULL) {
vmihalcut 0:fdfe93cb9255 133 rt_put_prio ((P_XCB)p_SCB, os_tsk.run);
vmihalcut 0:fdfe93cb9255 134 }
vmihalcut 0:fdfe93cb9255 135 else {
vmihalcut 0:fdfe93cb9255 136 p_SCB->p_lnk = os_tsk.run;
vmihalcut 0:fdfe93cb9255 137 os_tsk.run->p_lnk = NULL;
vmihalcut 0:fdfe93cb9255 138 os_tsk.run->p_rlnk = (P_TCB)p_SCB;
vmihalcut 0:fdfe93cb9255 139 }
vmihalcut 0:fdfe93cb9255 140 rt_block(timeout, WAIT_SEM);
vmihalcut 0:fdfe93cb9255 141 return (OS_R_TMO);
vmihalcut 0:fdfe93cb9255 142 }
vmihalcut 0:fdfe93cb9255 143
vmihalcut 0:fdfe93cb9255 144
vmihalcut 0:fdfe93cb9255 145 /*--------------------------- isr_sem_send ----------------------------------*/
vmihalcut 0:fdfe93cb9255 146
vmihalcut 0:fdfe93cb9255 147 void isr_sem_send (OS_ID semaphore) {
vmihalcut 0:fdfe93cb9255 148 /* Same function as "os_sem"send", but to be called by ISRs */
vmihalcut 0:fdfe93cb9255 149 P_SCB p_SCB = semaphore;
vmihalcut 0:fdfe93cb9255 150
vmihalcut 0:fdfe93cb9255 151 rt_psq_enq (p_SCB, 0);
vmihalcut 0:fdfe93cb9255 152 rt_psh_req ();
vmihalcut 0:fdfe93cb9255 153 }
vmihalcut 0:fdfe93cb9255 154
vmihalcut 0:fdfe93cb9255 155
vmihalcut 0:fdfe93cb9255 156 /*--------------------------- rt_sem_psh ------------------------------------*/
vmihalcut 0:fdfe93cb9255 157
vmihalcut 0:fdfe93cb9255 158 void rt_sem_psh (P_SCB p_CB) {
vmihalcut 0:fdfe93cb9255 159 /* Check if task has to be waken up */
vmihalcut 0:fdfe93cb9255 160 P_TCB p_TCB;
vmihalcut 0:fdfe93cb9255 161
vmihalcut 0:fdfe93cb9255 162 if (p_CB->p_lnk != NULL) {
vmihalcut 0:fdfe93cb9255 163 /* A task is waiting for token */
vmihalcut 0:fdfe93cb9255 164 p_TCB = rt_get_first ((P_XCB)p_CB);
vmihalcut 0:fdfe93cb9255 165 rt_rmv_dly (p_TCB);
vmihalcut 0:fdfe93cb9255 166 p_TCB->state = READY;
vmihalcut 0:fdfe93cb9255 167 #ifdef __CMSIS_RTOS
vmihalcut 0:fdfe93cb9255 168 rt_ret_val(p_TCB, 1);
vmihalcut 0:fdfe93cb9255 169 #else
vmihalcut 0:fdfe93cb9255 170 rt_ret_val(p_TCB, OS_R_SEM);
vmihalcut 0:fdfe93cb9255 171 #endif
vmihalcut 0:fdfe93cb9255 172 rt_put_prio (&os_rdy, p_TCB);
vmihalcut 0:fdfe93cb9255 173 }
vmihalcut 0:fdfe93cb9255 174 else {
vmihalcut 0:fdfe93cb9255 175 /* Store token */
vmihalcut 0:fdfe93cb9255 176 p_CB->tokens++;
vmihalcut 0:fdfe93cb9255 177 }
vmihalcut 0:fdfe93cb9255 178 }
vmihalcut 0:fdfe93cb9255 179
vmihalcut 0:fdfe93cb9255 180 /*----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 181 * end of file
vmihalcut 0:fdfe93cb9255 182 *---------------------------------------------------------------------------*/
vmihalcut 0:fdfe93cb9255 183