| /* |
| * Copyright (c) 2015-2016, Texas Instruments Incorporated |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * * Neither the name of Texas Instruments Incorporated nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * ======== SemaphoreP_freertos.c ======== |
| */ |
| |
| #include <ti/drivers/dpl/SemaphoreP.h> |
| #include <ti/drivers/dpl/HwiP.h> |
| |
| #include <FreeRTOS.h> |
| #include <semphr.h> |
| #include <queue.h> |
| |
| /* |
| * ======== SemaphoreP_create ======== |
| */ |
| SemaphoreP_Handle SemaphoreP_create(unsigned int count, |
| SemaphoreP_Params *params) |
| { |
| SemaphoreHandle_t sem = NULL; |
| SemaphoreP_Params semParams; |
| |
| if (params == NULL) { |
| params = &semParams; |
| SemaphoreP_Params_init(params); |
| } |
| |
| if (params->mode == SemaphoreP_Mode_COUNTING) { |
| #if (configUSE_COUNTING_SEMAPHORES == 1) |
| sem = xSemaphoreCreateCounting((UBaseType_t)params->maxCount, |
| (UBaseType_t)count); |
| #endif |
| } |
| else { |
| sem = xSemaphoreCreateBinary(); |
| if (count != 0) { |
| xSemaphoreGive(sem); |
| } |
| } |
| |
| return ((SemaphoreP_Handle)sem); |
| } |
| |
| /* |
| * ======== SemaphoreP_delete ======== |
| */ |
| SemaphoreP_Status SemaphoreP_delete(SemaphoreP_Handle handle) |
| { |
| vSemaphoreDelete((SemaphoreHandle_t)handle); |
| return (SemaphoreP_OK); |
| } |
| |
| /* |
| * ======== SemaphoreP_Params_init ======== |
| */ |
| void SemaphoreP_Params_init(SemaphoreP_Params *params) |
| { |
| params->mode = SemaphoreP_Mode_BINARY; |
| params->name = NULL; |
| params->maxCount = 1; |
| params->callback = NULL; |
| } |
| |
| /* |
| * ======== SemaphoreP_pend ======== |
| */ |
| SemaphoreP_Status SemaphoreP_pend(SemaphoreP_Handle handle, uint32_t timeout) |
| { |
| BaseType_t status; |
| uint32_t ticks; |
| uint32_t tickRateMS; |
| |
| if (timeout == SemaphoreP_WAIT_FOREVER) { |
| ticks = portMAX_DELAY; |
| } |
| else { |
| tickRateMS = (configTICK_RATE_HZ / 1000); |
| /* |
| * Don't wait if tick rate resolution is greater than 1ms and |
| * prevent potential division by 0 when calculating the ticks to |
| * delay. |
| */ |
| if (tickRateMS == 0) { |
| ticks = 0; |
| } |
| else { |
| ticks = (timeout / tickRateMS); |
| } |
| } |
| |
| status = xSemaphoreTake((SemaphoreHandle_t)handle, ticks); |
| |
| if (status == pdTRUE) { |
| return (SemaphoreP_OK); |
| } |
| |
| return (SemaphoreP_TIMEOUT); |
| } |
| |
| /* |
| * ======== SemaphoreP_post ======== |
| */ |
| SemaphoreP_Status SemaphoreP_post(SemaphoreP_Handle handle) |
| { |
| BaseType_t xHigherPriorityTaskWoken; |
| BaseType_t result; |
| SemaphoreP_Status status; |
| |
| if (!HwiP_inISR()) { |
| /* Not in ISR */ |
| xSemaphoreGive((SemaphoreHandle_t)handle); |
| status = SemaphoreP_OK; |
| } |
| else { |
| result = xSemaphoreGiveFromISR((SemaphoreHandle_t)handle, |
| &xHigherPriorityTaskWoken); |
| |
| if (result == pdTRUE) { |
| status = SemaphoreP_OK; |
| } |
| else { |
| /* The queue is full */ |
| status = SemaphoreP_FAILURE; |
| } |
| } |
| return (status); |
| } |
| |
| /* |
| * ======== SemaphoreP_postFromClock ======== |
| */ |
| SemaphoreP_Status SemaphoreP_postFromClock(SemaphoreP_Handle handle) |
| { |
| return (SemaphoreP_post(handle)); |
| } |