157 lines
4.8 KiB
C++
157 lines
4.8 KiB
C++
/**
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******************************************************************************
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* File Name : OSWrappers.cpp
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******************************************************************************
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* This file is generated by TouchGFX Generator 4.26.0. Please, do not edit!
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2025 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#include <touchgfx/hal/HAL.hpp>
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#include <touchgfx/hal/OSWrappers.hpp>
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#include <cmsis_os2.h>
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#include <cassert>
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static osSemaphoreId_t frame_buffer_sem = NULL;
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static osMessageQueueId_t vsync_queue = NULL;
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// Just a dummy value to insert in the VSYNC queue.
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static uint32_t dummy = 0x5a;
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using namespace touchgfx;
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/*
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* Initialize frame buffer semaphore and queue/mutex for VSYNC signal.
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*/
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void OSWrappers::initialize()
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{
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// Create a queue of length 1
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frame_buffer_sem = osSemaphoreNew(1, 1, NULL); // Binary semaphore
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assert((frame_buffer_sem != NULL) && "Creation of framebuffer semaphore failed");
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// Create a queue of length 1
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vsync_queue = osMessageQueueNew(1, 4, NULL);
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assert((vsync_queue != NULL) && "Creation of vsync message queue failed");
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}
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/*
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* Take the frame buffer semaphore. Blocks until semaphore is available.
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*/
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void OSWrappers::takeFrameBufferSemaphore()
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{
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osSemaphoreAcquire(frame_buffer_sem, osWaitForever);
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}
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/*
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* Release the frame buffer semaphore.
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*/
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void OSWrappers::giveFrameBufferSemaphore()
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{
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osSemaphoreRelease(frame_buffer_sem);
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}
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/*
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* Attempt to obtain the frame buffer semaphore. If semaphore is not available, do
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* nothing.
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*
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* Note must return immediately! This function does not care who has the taken the semaphore,
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* it only serves to make sure that the semaphore is taken by someone.
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*/
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void OSWrappers::tryTakeFrameBufferSemaphore()
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{
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osSemaphoreAcquire(frame_buffer_sem, 0);
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}
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/*
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* Release the frame buffer semaphore in a way that is safe in interrupt context. Called
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* from ISR.
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*
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* Release the frame buffer semaphore in a way that is safe in interrupt context.
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* Called from ISR.
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*/
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void OSWrappers::giveFrameBufferSemaphoreFromISR()
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{
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osSemaphoreRelease(frame_buffer_sem);
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}
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/*
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* Signal that a VSYNC has occurred. Should make the vsync queue/mutex available.
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*
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* Note This function is called from an ISR, and should (depending on OS) trigger a
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* scheduling.
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*/
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void OSWrappers::signalVSync()
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{
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osMessageQueuePut(vsync_queue, &dummy, 0, 0);
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}
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/*
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* Signal that the rendering of the frame has completed. Used by
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* some systems to avoid using any previous vsync.
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*/
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void OSWrappers::signalRenderingDone()
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{
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// Empty implementation for CMSIS V2
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}
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/*
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* This function blocks until a VSYNC occurs.
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*
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* Note This function must first clear the mutex/queue and then wait for the next one to
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* occur.
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*/
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void OSWrappers::waitForVSync()
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{
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uint32_t dummyGet;
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// First make sure the queue is empty, by trying to remove an element with 0 timeout.
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osMessageQueueGet(vsync_queue, &dummyGet, 0, 0);
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// Then, wait for next VSYNC to occur.
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osMessageQueueGet(vsync_queue, &dummyGet, 0, osWaitForever);
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}
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/*
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* A function that causes executing task to sleep for a number of milliseconds.
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*
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* A function that causes executing task to sleep for a number of milliseconds.
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* This function is OPTIONAL. It is only used by the TouchGFX in the case of
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* a specific frame refresh strategy (REFRESH_STRATEGY_OPTIM_SINGLE_BUFFER_TFT_CTRL).
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* Due to backwards compatibility, in order for this function to be useable by the HAL
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* the function must be explicitly registered:
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* hal.registerTaskDelayFunction(&OSWrappers::taskDelay)
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*
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* see HAL::setFrameRefreshStrategy(FrameRefreshStrategy s)
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* see HAL::registerTaskDelayFunction(void (*delayF)(uint16_t))
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*/
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void OSWrappers::taskDelay(uint16_t ms)
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{
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osDelay(static_cast<uint32_t>(ms));
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}
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/**
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* A function that causes the executing task to yield control to
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* another thread. This function is used by the framework when it
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* is necessary to wait a little before continuing (e.g. drawing).
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*
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* The implementation should typically request the operating
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* system to change to another task of similar priority. When
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* running without an operating system, the implementation can run
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* a very short task and return.
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*/
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void OSWrappers::taskYield()
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{
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osThreadYield();
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}
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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