109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
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#include <touchgfx/hal/OSWrappers.hpp>
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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#include "semphr.h"
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#include <touchgfx/hal/GPIO.hpp>
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#include <touchgfx/hal/HAL.hpp>
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using namespace touchgfx;
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static xSemaphoreHandle frame_buffer_sem;
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static xQueueHandle vsync_q = 0;
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// Just a dummy value to insert in the VSYNC queue.
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static uint8_t dummy = 0x5a;
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void OSWrappers::initialize()
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{
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vSemaphoreCreateBinary(frame_buffer_sem);
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// Create a queue of length 1
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vsync_q = xQueueGenericCreate(1, 1, 0);
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}
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void OSWrappers::takeFrameBufferSemaphore()
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{
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xSemaphoreTake(frame_buffer_sem, portMAX_DELAY);
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}
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void OSWrappers::giveFrameBufferSemaphore()
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{
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xSemaphoreGive(frame_buffer_sem);
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}
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void OSWrappers::tryTakeFrameBufferSemaphore()
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{
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xSemaphoreTake(frame_buffer_sem, 0);
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}
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void OSWrappers::giveFrameBufferSemaphoreFromISR()
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{
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// Since this is called from an interrupt, FreeRTOS requires special handling to trigger a
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// re-scheduling. May be applicable for other OSes as well.
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portBASE_TYPE px = pdFALSE;
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xSemaphoreGiveFromISR(frame_buffer_sem, &px);
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portEND_SWITCHING_ISR(px);
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}
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void OSWrappers::signalVSync()
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{
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if (vsync_q)
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{
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// Since this is called from an interrupt, FreeRTOS requires special handling to trigger a
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// re-scheduling. May be applicable for other OSes as well.
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portBASE_TYPE px = pdFALSE;
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xQueueSendFromISR(vsync_q, &dummy, &px);
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portEND_SWITCHING_ISR(px);
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}
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}
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void OSWrappers::waitForVSync()
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{
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// First make sure the queue is empty, by trying to remove an element with 0 timeout.
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xQueueReceive(vsync_q, &dummy, 0);
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// Then, wait for next VSYNC to occur.
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xQueueReceive(vsync_q, &dummy, portMAX_DELAY);
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}
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void OSWrappers::taskDelay(uint16_t ms)
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{
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vTaskDelay(ms);
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}
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static portBASE_TYPE IdleTaskHook(void* p)
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{
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if ((int)p) // Idle task sched out
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{
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touchgfx::HAL::getInstance()->setMCUActive(true);
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}
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else // Idle task sched in
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{
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touchgfx::HAL::getInstance()->setMCUActive(false);
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}
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return pdTRUE;
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}
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// FreeRTOS specific handlers
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extern "C"
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{
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void vApplicationStackOverflowHook(xTaskHandle xTask,
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signed portCHAR* pcTaskName)
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{
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while (1);
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}
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void vApplicationMallocFailedHook(xTaskHandle xTask,
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signed portCHAR* pcTaskName)
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{
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while (1);
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}
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void vApplicationIdleHook(void)
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{
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// Set task tag in order to have the "IdleTaskHook" function called when the idle task is
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// switched in/out. Used solely for measuring MCU load, and can be removed if MCU load
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// readout is not needed.
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vTaskSetApplicationTaskTag(NULL, IdleTaskHook);
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}
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}
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