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Dependencies:   mbed nRF24L01P

mbed-rtos/rtx/rt_Event.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_EVENT.C
vmihalcut 0:fdfe93cb9255 5 * Purpose: Implements waits and wake-ups for event flags
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_Event.h"
vmihalcut 0:fdfe93cb9255 39 #include "rt_List.h"
vmihalcut 0:fdfe93cb9255 40 #include "rt_Task.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_evt_wait -----------------------------------*/
vmihalcut 0:fdfe93cb9255 50
vmihalcut 0:fdfe93cb9255 51 OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
vmihalcut 0:fdfe93cb9255 52 /* Wait for one or more event flags with optional time-out. */
vmihalcut 0:fdfe93cb9255 53 /* "wait_flags" identifies the flags to wait for. */
vmihalcut 0:fdfe93cb9255 54 /* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
vmihalcut 0:fdfe93cb9255 55 /* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
vmihalcut 0:fdfe93cb9255 56 /* to complete the wait. (OR-ing if set to 0). */
vmihalcut 0:fdfe93cb9255 57 U32 block_state;
vmihalcut 0:fdfe93cb9255 58
vmihalcut 0:fdfe93cb9255 59 if (and_wait) {
vmihalcut 0:fdfe93cb9255 60 /* Check for AND-connected events */
vmihalcut 0:fdfe93cb9255 61 if ((os_tsk.run->events & wait_flags) == wait_flags) {
vmihalcut 0:fdfe93cb9255 62 os_tsk.run->events &= ~wait_flags;
vmihalcut 0:fdfe93cb9255 63 return (OS_R_EVT);
vmihalcut 0:fdfe93cb9255 64 }
vmihalcut 0:fdfe93cb9255 65 block_state = WAIT_AND;
vmihalcut 0:fdfe93cb9255 66 }
vmihalcut 0:fdfe93cb9255 67 else {
vmihalcut 0:fdfe93cb9255 68 /* Check for OR-connected events */
vmihalcut 0:fdfe93cb9255 69 if (os_tsk.run->events & wait_flags) {
vmihalcut 0:fdfe93cb9255 70 os_tsk.run->waits = os_tsk.run->events & wait_flags;
vmihalcut 0:fdfe93cb9255 71 os_tsk.run->events &= ~wait_flags;
vmihalcut 0:fdfe93cb9255 72 return (OS_R_EVT);
vmihalcut 0:fdfe93cb9255 73 }
vmihalcut 0:fdfe93cb9255 74 block_state = WAIT_OR;
vmihalcut 0:fdfe93cb9255 75 }
vmihalcut 0:fdfe93cb9255 76 /* Task has to wait */
vmihalcut 0:fdfe93cb9255 77 os_tsk.run->waits = wait_flags;
vmihalcut 0:fdfe93cb9255 78 rt_block (timeout, (U8)block_state);
vmihalcut 0:fdfe93cb9255 79 return (OS_R_TMO);
vmihalcut 0:fdfe93cb9255 80 }
vmihalcut 0:fdfe93cb9255 81
vmihalcut 0:fdfe93cb9255 82
vmihalcut 0:fdfe93cb9255 83 /*--------------------------- rt_evt_set ------------------------------------*/
vmihalcut 0:fdfe93cb9255 84
vmihalcut 0:fdfe93cb9255 85 void rt_evt_set (U16 event_flags, OS_TID task_id) {
vmihalcut 0:fdfe93cb9255 86 /* Set one or more event flags of a selectable task. */
vmihalcut 0:fdfe93cb9255 87 P_TCB p_tcb;
vmihalcut 0:fdfe93cb9255 88
vmihalcut 0:fdfe93cb9255 89 p_tcb = os_active_TCB[task_id-1];
vmihalcut 0:fdfe93cb9255 90 if (p_tcb == NULL) {
vmihalcut 0:fdfe93cb9255 91 return;
vmihalcut 0:fdfe93cb9255 92 }
vmihalcut 0:fdfe93cb9255 93 p_tcb->events |= event_flags;
vmihalcut 0:fdfe93cb9255 94 event_flags = p_tcb->waits;
vmihalcut 0:fdfe93cb9255 95 /* If the task is not waiting for an event, it should not be put */
vmihalcut 0:fdfe93cb9255 96 /* to ready state. */
vmihalcut 0:fdfe93cb9255 97 if (p_tcb->state == WAIT_AND) {
vmihalcut 0:fdfe93cb9255 98 /* Check for AND-connected events */
vmihalcut 0:fdfe93cb9255 99 if ((p_tcb->events & event_flags) == event_flags) {
vmihalcut 0:fdfe93cb9255 100 goto wkup;
vmihalcut 0:fdfe93cb9255 101 }
vmihalcut 0:fdfe93cb9255 102 }
vmihalcut 0:fdfe93cb9255 103 if (p_tcb->state == WAIT_OR) {
vmihalcut 0:fdfe93cb9255 104 /* Check for OR-connected events */
vmihalcut 0:fdfe93cb9255 105 if (p_tcb->events & event_flags) {
vmihalcut 0:fdfe93cb9255 106 p_tcb->waits &= p_tcb->events;
vmihalcut 0:fdfe93cb9255 107 wkup: p_tcb->events &= ~event_flags;
vmihalcut 0:fdfe93cb9255 108 rt_rmv_dly (p_tcb);
vmihalcut 0:fdfe93cb9255 109 p_tcb->state = READY;
vmihalcut 0:fdfe93cb9255 110 #ifdef __CMSIS_RTOS
vmihalcut 0:fdfe93cb9255 111 rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
vmihalcut 0:fdfe93cb9255 112 #else
vmihalcut 0:fdfe93cb9255 113 rt_ret_val (p_tcb, OS_R_EVT);
vmihalcut 0:fdfe93cb9255 114 #endif
vmihalcut 0:fdfe93cb9255 115 rt_dispatch (p_tcb);
vmihalcut 0:fdfe93cb9255 116 }
vmihalcut 0:fdfe93cb9255 117 }
vmihalcut 0:fdfe93cb9255 118 }
vmihalcut 0:fdfe93cb9255 119
vmihalcut 0:fdfe93cb9255 120
vmihalcut 0:fdfe93cb9255 121 /*--------------------------- rt_evt_clr ------------------------------------*/
vmihalcut 0:fdfe93cb9255 122
vmihalcut 0:fdfe93cb9255 123 void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
vmihalcut 0:fdfe93cb9255 124 /* Clear one or more event flags (identified by "clear_flags") of a */
vmihalcut 0:fdfe93cb9255 125 /* selectable task (identified by "task"). */
vmihalcut 0:fdfe93cb9255 126 P_TCB task = os_active_TCB[task_id-1];
vmihalcut 0:fdfe93cb9255 127
vmihalcut 0:fdfe93cb9255 128 if (task == NULL) {
vmihalcut 0:fdfe93cb9255 129 return;
vmihalcut 0:fdfe93cb9255 130 }
vmihalcut 0:fdfe93cb9255 131 task->events &= ~clear_flags;
vmihalcut 0:fdfe93cb9255 132 }
vmihalcut 0:fdfe93cb9255 133
vmihalcut 0:fdfe93cb9255 134
vmihalcut 0:fdfe93cb9255 135 /*--------------------------- isr_evt_set -----------------------------------*/
vmihalcut 0:fdfe93cb9255 136
vmihalcut 0:fdfe93cb9255 137 void isr_evt_set (U16 event_flags, OS_TID task_id) {
vmihalcut 0:fdfe93cb9255 138 /* Same function as "os_evt_set", but to be called by ISRs. */
vmihalcut 0:fdfe93cb9255 139 P_TCB p_tcb = os_active_TCB[task_id-1];
vmihalcut 0:fdfe93cb9255 140
vmihalcut 0:fdfe93cb9255 141 if (p_tcb == NULL) {
vmihalcut 0:fdfe93cb9255 142 return;
vmihalcut 0:fdfe93cb9255 143 }
vmihalcut 0:fdfe93cb9255 144 rt_psq_enq (p_tcb, event_flags);
vmihalcut 0:fdfe93cb9255 145 rt_psh_req ();
vmihalcut 0:fdfe93cb9255 146 }
vmihalcut 0:fdfe93cb9255 147
vmihalcut 0:fdfe93cb9255 148
vmihalcut 0:fdfe93cb9255 149 /*--------------------------- rt_evt_get ------------------------------------*/
vmihalcut 0:fdfe93cb9255 150
vmihalcut 0:fdfe93cb9255 151 U16 rt_evt_get (void) {
vmihalcut 0:fdfe93cb9255 152 /* Get events of a running task after waiting for OR connected events. */
vmihalcut 0:fdfe93cb9255 153 return (os_tsk.run->waits);
vmihalcut 0:fdfe93cb9255 154 }
vmihalcut 0:fdfe93cb9255 155
vmihalcut 0:fdfe93cb9255 156
vmihalcut 0:fdfe93cb9255 157 /*--------------------------- rt_evt_psh ------------------------------------*/
vmihalcut 0:fdfe93cb9255 158
vmihalcut 0:fdfe93cb9255 159 void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
vmihalcut 0:fdfe93cb9255 160 /* Check if task has to be waken up */
vmihalcut 0:fdfe93cb9255 161 U16 event_flags;
vmihalcut 0:fdfe93cb9255 162
vmihalcut 0:fdfe93cb9255 163 p_CB->events |= set_flags;
vmihalcut 0:fdfe93cb9255 164 event_flags = p_CB->waits;
vmihalcut 0:fdfe93cb9255 165 if (p_CB->state == WAIT_AND) {
vmihalcut 0:fdfe93cb9255 166 /* Check for AND-connected events */
vmihalcut 0:fdfe93cb9255 167 if ((p_CB->events & event_flags) == event_flags) {
vmihalcut 0:fdfe93cb9255 168 goto rdy;
vmihalcut 0:fdfe93cb9255 169 }
vmihalcut 0:fdfe93cb9255 170 }
vmihalcut 0:fdfe93cb9255 171 if (p_CB->state == WAIT_OR) {
vmihalcut 0:fdfe93cb9255 172 /* Check for OR-connected events */
vmihalcut 0:fdfe93cb9255 173 if (p_CB->events & event_flags) {
vmihalcut 0:fdfe93cb9255 174 p_CB->waits &= p_CB->events;
vmihalcut 0:fdfe93cb9255 175 rdy: p_CB->events &= ~event_flags;
vmihalcut 0:fdfe93cb9255 176 rt_rmv_dly (p_CB);
vmihalcut 0:fdfe93cb9255 177 p_CB->state = READY;
vmihalcut 0:fdfe93cb9255 178 #ifdef __CMSIS_RTOS
vmihalcut 0:fdfe93cb9255 179 rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
vmihalcut 0:fdfe93cb9255 180 #else
vmihalcut 0:fdfe93cb9255 181 rt_ret_val (p_CB, OS_R_EVT);
vmihalcut 0:fdfe93cb9255 182 #endif
vmihalcut 0:fdfe93cb9255 183 rt_put_prio (&os_rdy, p_CB);
vmihalcut 0:fdfe93cb9255 184 }
vmihalcut 0:fdfe93cb9255 185 }
vmihalcut 0:fdfe93cb9255 186 }
vmihalcut 0:fdfe93cb9255 187
vmihalcut 0:fdfe93cb9255 188 /*----------------------------------------------------------------------------
vmihalcut 0:fdfe93cb9255 189 * end of file
vmihalcut 0:fdfe93cb9255 190 *---------------------------------------------------------------------------*/