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2025-07-29 19:13:39 +08:00 · 2024-06-03 16:27:41 +08:00
commit b7ab42dd94
625 changed files with 214806 additions and 0 deletions
--- a/SOFTWARE-FreeRTOS/Common/Minimal/flash.c
+++ b/SOFTWARE-FreeRTOS/Common/Minimal/flash.c
@@ -0,0 +1,117 @@
+/*
+ * FreeRTOS V202212.00
+ * 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.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/**
+ * This version of flash .c is for use on systems that have limited stack space
+ * and no display facilities.  The complete version can be found in the
+ * Demo/Common/Full directory.
+ *
+ * Three tasks are created, each of which flash an LED at a different rate.  The first
+ * LED flashes every 200ms, the second every 400ms, the third every 600ms.
+ *
+ * The LED flash tasks provide instant visual feedback.  They show that the scheduler
+ * is still operational.
+ *
+ */
+
+
+#include <stdlib.h>
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* Demo program include files. */
+#include "partest.h"
+#include "flash.h"
+
+#define ledSTACK_SIZE         configMINIMAL_STACK_SIZE
+#define ledNUMBER_OF_LEDS     ( 3 )
+#define ledFLASH_RATE_BASE    ( ( TickType_t ) 333 )
+
+/* Variable used by the created tasks to calculate the LED number to use, and
+ * the rate at which they should flash the LED. */
+static volatile UBaseType_t uxFlashTaskNumber = 0;
+
+/* The task that is created three times. */
+static portTASK_FUNCTION_PROTO( vLEDFlashTask, pvParameters );
+
+/*-----------------------------------------------------------*/
+
+void vStartLEDFlashTasks( UBaseType_t uxPriority )
+{
+    BaseType_t xLEDTask;
+
+    /* Create the three tasks. */
+    for( xLEDTask = 0; xLEDTask < ledNUMBER_OF_LEDS; ++xLEDTask )
+    {
+        /* Spawn the task. */
+        xTaskCreate( vLEDFlashTask, "LEDx", ledSTACK_SIZE, NULL, uxPriority, ( TaskHandle_t * ) NULL );
+    }
+}
+/*-----------------------------------------------------------*/
+
+static portTASK_FUNCTION( vLEDFlashTask, pvParameters )
+{
+    TickType_t xFlashRate, xLastFlashTime;
+    UBaseType_t uxLED;
+
+    /* The parameters are not used. */
+    ( void ) pvParameters;
+
+    /* Calculate the LED and flash rate. */
+    portENTER_CRITICAL();
+    {
+        /* See which of the eight LED's we should use. */
+        uxLED = uxFlashTaskNumber;
+
+        /* Update so the next task uses the next LED. */
+        uxFlashTaskNumber++;
+    }
+    portEXIT_CRITICAL();
+
+    xFlashRate = ledFLASH_RATE_BASE + ( ledFLASH_RATE_BASE * ( TickType_t ) uxLED );
+    xFlashRate /= portTICK_PERIOD_MS;
+
+    /* We will turn the LED on and off again in the delay period, so each
+     * delay is only half the total period. */
+    xFlashRate /= ( TickType_t ) 2;
+
+    /* We need to initialise xLastFlashTime prior to the first call to
+     * vTaskDelayUntil(). */
+    xLastFlashTime = xTaskGetTickCount();
+
+    for( ; ; )
+    {
+        /* Delay for half the flash period then turn the LED on. */
+        vTaskDelayUntil( &xLastFlashTime, xFlashRate );
+        vParTestToggleLED( uxLED );
+
+        /* Delay for half the flash period then turn the LED off. */
+        vTaskDelayUntil( &xLastFlashTime, xFlashRate );
+        vParTestToggleLED( uxLED );
+    }
+} /*lint !e715 !e818 !e830 Function definition must be standard for task creation. */