initial

SOFTWARE-FreeRTOS/Common/Full/flash.c

@@ -0,0 +1,126 @@
+/*
+ * 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
+ *
+ */
+
+
+/**
+ * Creates eight tasks, each of which flash an LED at a different rate.  The first
+ * LED flashes every 125ms, the second every 250ms, the third every 375ms, etc.
+ *
+ * The LED flash tasks provide instant visual feedback.  They show that the scheduler
+ * is still operational.
+ *
+ * The PC port uses the standard parallel port for outputs, the Flashlite 186 port
+ * uses IO port F.
+ *
+ * \page flashC flash.c
+ * \ingroup DemoFiles
+ * <HR>
+ */
+
+/*
+ * Changes from V2.0.0
+ *
+ + Delay periods are now specified using variables and constants of
+ +    TickType_t rather than unsigned long.
+ +
+ + Changes from V2.1.1
+ +
+ + The stack size now uses configMINIMAL_STACK_SIZE.
+ + String constants made file scope to decrease stack depth on 8051 port.
+ */
+
+#include <stdlib.h>
+
+/* Scheduler include files. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* Demo program include files. */
+#include "partest.h"
+#include "flash.h"
+#include "print.h"
+
+#define ledSTACK_SIZE    configMINIMAL_STACK_SIZE
+
+/* Structure used to pass parameters to the LED tasks. */
+typedef struct LED_PARAMETERS
+{
+    unsigned portBASE_TYPE uxLED; /*< The output the task should use. */
+    TickType_t xFlashRate;        /*< The rate at which the LED should flash. */
+} xLEDParameters;
+
+/* The task that is created eight times - each time with a different xLEDParameters
+ * structure passed in as the parameter. */
+static void vLEDFlashTask( void * pvParameters );
+
+/* String to print if USE_STDIO is defined. */
+const char * const pcTaskStartMsg = "LED flash task started.\r\n";
+
+/*-----------------------------------------------------------*/
+
+void vStartLEDFlashTasks( unsigned portBASE_TYPE uxPriority )
+{
+    unsigned portBASE_TYPE uxLEDTask;
+    xLEDParameters * pxLEDParameters;
+    const unsigned portBASE_TYPE uxNumOfLEDs = 8;
+    const TickType_t xFlashRate = 125;
+
+    /* Create the eight tasks. */
+    for( uxLEDTask = 0; uxLEDTask < uxNumOfLEDs; ++uxLEDTask )
+    {
+        /* Create and complete the structure used to pass parameters to the next
+         * created task. */
+        pxLEDParameters = ( xLEDParameters * ) pvPortMalloc( sizeof( xLEDParameters ) );
+        pxLEDParameters->uxLED = uxLEDTask;
+        pxLEDParameters->xFlashRate = ( xFlashRate + ( xFlashRate * ( TickType_t ) uxLEDTask ) );
+        pxLEDParameters->xFlashRate /= portTICK_PERIOD_MS;
+
+        /* Spawn the task. */
+        xTaskCreate( vLEDFlashTask, "LEDx", ledSTACK_SIZE, ( void * ) pxLEDParameters, uxPriority, ( TaskHandle_t * ) NULL );
+    }
+}
+/*-----------------------------------------------------------*/
+
+static void vLEDFlashTask( void * pvParameters )
+{
+    xLEDParameters * pxParameters;
+
+    /* Queue a message for printing to say the task has started. */
+    vPrintDisplayMessage( &pcTaskStartMsg );
+
+    pxParameters = ( xLEDParameters * ) pvParameters;
+
+    for( ; ; )
+    {
+        /* Delay for half the flash period then turn the LED on. */
+        vTaskDelay( pxParameters->xFlashRate / ( TickType_t ) 2 );
+        vParTestToggleLED( pxParameters->uxLED );
+
+        /* Delay for half the flash period then turn the LED off. */
+        vTaskDelay( pxParameters->xFlashRate / ( TickType_t ) 2 );
+        vParTestToggleLED( pxParameters->uxLED );
+    }
+}