From 0bb6473f880e69c294f78972a04c286a088d15fb Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@unormal.org>
Date: Sat, 1 Feb 2014 17:06:20 +0100
Subject: initial public release of FreeRTOS port (does still need some
 cleanup)

---
 src/gos/freertos.c | 151 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 src/gos/freertos.c

(limited to 'src')

diff --git a/src/gos/freertos.c b/src/gos/freertos.c
new file mode 100644
index 00000000..9b22af1b
--- /dev/null
+++ b/src/gos/freertos.c
@@ -0,0 +1,151 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * @file    src/gos/freertos.c
+ * @brief   GOS FreeRTOS Operating System support.
+ */
+#include "heivs/config.h"
+#include "gfx.h"
+#include "heivs/delay.h"
+#include "freertos/FreeRTOS.h"
+#include "config/FreeRTOSConfig.h"
+#include <string.h>
+
+#if configUSE_MUTEXES != 1
+	#error "GOS: configUSE_MUTEXES must be defined in FreeRTOSConfig.h"
+#endif
+
+#if configUSE_COUNTING_SEMAPHORES  != 1
+	#error "GOS: configUSE_COUNTING_SEMAPHORES must be defined in FreeRTOSConfig.h"
+#endif
+
+void _gosInit(void)
+{
+	// IMPORTANT: Check for already started scheduler here!!!
+	vTaskStartScheduler(); 
+}
+
+void* gfxRealloc(void *ptr, size_t oldsz, size_t newsz)
+{
+	void *np;
+
+	if (newsz <= oldsz)
+		return ptr;
+
+	np = gfxAlloc(newsz);
+	if (!np)
+		return 0;
+
+	if (oldsz) {
+		memcpy(np, ptr, oldsz);
+		vPortFree(ptr);
+	}
+
+	return np;
+}
+
+void gfxSleepMilliseconds(delaytime_t ms)
+{
+	if(ms == TIME_IMMEDIATE) {
+		taskYIELD();
+	} else {
+		vTaskDelay(ms);
+	}
+}
+
+void gfxSleepMicroseconds(delaytime_t ms)
+{
+	delay_wait_us(ms);
+}
+
+portTickType MS2ST(portTickType ms)
+{
+	uint64_t	val;
+
+	if(configTICK_RATE_HZ == 1000) {	// gain time because no test to do in most case
+		return ms;
+	}
+
+	val = ms;
+	val *= configTICK_RATE_HZ;
+	val += 999;
+	val /= 1000;
+
+	return val;
+}
+
+void gfxSemInit(gfxSem* psem, semcount_t val, semcount_t limit)
+{
+	if (val > limit)
+		val = limit;
+
+	psem->counter = val;
+	psem->limit = limit;
+	psem->sem = xSemaphoreCreateCounting(limit,val);
+
+	vTraceSetSemaphoreName(psem->sem, "uGFXSema"); // for FreeRTOS+Trace debug
+}
+
+void gfxSemDestroy(gfxSem* psem)
+{
+	vSemaphoreDelete(psem->sem);
+}
+
+bool_t gfxSemWait(gfxSem* psem, delaytime_t ms)
+{
+	psem->counter--;
+
+	if(xSemaphoreTake(psem->sem, MS2ST(ms)) == pdPASS)
+		return TRUE;
+
+	psem->counter++;
+
+	return FALSE;
+}
+
+void gfxSemSignal(gfxSem* psem)
+{
+	taskENTER_CRITICAL();
+
+	if(psem->counter < psem->limit) {
+		psem->counter++;
+		xSemaphoreGive(psem->sem);
+	}
+
+	taskYIELD();
+	taskEXIT_CRITICAL();
+}
+
+void gfxSemSignalI(gfxSem* psem)
+{
+	portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
+
+	if(psem->counter < psem->limit) {
+		psem->counter++;
+		xSemaphoreGiveFromISR(psem->sem,&xHigherPriorityTaskWoken);
+	}
+}
+
+gfxThreadHandle gfxThreadCreate(void *stackarea, size_t stacksz, threadpriority_t prio, DECLARE_THREAD_FUNCTION((*fn),p), void *param)
+{
+	xTaskHandle task = NULL;
+	stacksz = (size_t)stackarea;
+
+	if (stacksz < configMINIMAL_STACK_SIZE)
+		stacksz = configMINIMAL_STACK_SIZE;
+
+	if (xTaskCreate(fn, (signed char*)"uGFX_TASK", stacksz, param, prio, &task )!= pdPASS) {
+		for (;;);
+	}
+
+	return task;
+}
+
+#endif /* GFX_USE_OS_FREERTOS */
+/** @} */
+#endif /* USE_UGFX */
-- 
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