[freertos] add freertos firmware

Change-Id: I4158d66d9b5fc444e28287f55e79ac24e0a1666f

freertos/cvitek/task/demo/Common/Minimal/flash_timer.c

@@ -0,0 +1,97 @@
+/*
+ * FreeRTOS Kernel V10.3.0
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/**
+ * Repeatedly toggles one or more LEDs using software timers - one timer per
+ * LED.
+ */
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "timers.h"
+
+/* Demo program include files. */
+#include "partest.h"
+#include "flash_timer.h"
+
+/* The toggle rates are all a multple of ledFLASH_RATE_BASE. */
+#define ledFLASH_RATE_BASE (((TickType_t)333) / portTICK_PERIOD_MS)
+
+/* A block time of zero simple means "don't block". */
+#define ledDONT_BLOCK ((TickType_t)0)
+
+/*-----------------------------------------------------------*/
+
+/*
+ * The callback function used by each LED flashing timer.  All the timers use
+ * this function, and the timer ID is used within the function to determine
+ * which timer has actually expired.
+ */
+static void prvLEDTimerCallback(TimerHandle_t xTimer);
+
+/*-----------------------------------------------------------*/
+
+void vStartLEDFlashTimers(UBaseType_t uxNumberOfLEDs)
+{
+	UBaseType_t uxLEDTimer;
+	TimerHandle_t xTimer;
+
+	/* Create and start the requested number of timers. */
+	for (uxLEDTimer = 0; uxLEDTimer < uxNumberOfLEDs; ++uxLEDTimer) {
+		/* Create the timer. */
+		xTimer = xTimerCreate(
+			"Flasher", /* A text name, purely to help debugging. */
+			ledFLASH_RATE_BASE *
+				(uxLEDTimer +
+				 1), /* The timer period, which is a multiple of ledFLASH_RATE_BASE. */
+			pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
+			(void *)uxLEDTimer, /* The ID is used to identify the timer within the timer callback function, as each timer uses the same callback. */
+			prvLEDTimerCallback /* Each timer uses the same callback. */
+		);
+
+		/* If the timer was created successfully, attempt to start it.  If the
+		scheduler has not yet been started then the timer command queue must
+		be long enough to hold each command sent to it until such time that the
+		scheduler is started.  The timer command queue length is set by
+		configTIMER_QUEUE_LENGTH in FreeRTOSConfig.h. */
+		if (xTimer != NULL) {
+			xTimerStart(xTimer, ledDONT_BLOCK);
+		}
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvLEDTimerCallback(TimerHandle_t xTimer)
+{
+	BaseType_t xTimerID;
+
+	/* The timer ID is used to identify the timer that has actually expired as
+	each timer uses the same callback.  The ID is then also used as the number
+	of the LED that is to be toggled. */
+	xTimerID = (BaseType_t)pvTimerGetTimerID(xTimer);
+	vParTestToggleLED(xTimerID);
+}