diff options
| author | Yuval Adam <yuv.adm@gmail.com> | 2014-06-29 12:34:32 +0300 |
|---|---|---|
| committer | Yuval Adam <yuv.adm@gmail.com> | 2014-06-29 12:34:32 +0300 |
| commit | c3e4c9a25c2910d2d66d52215b3406b13d5b23d5 (patch) | |
| tree | added370d1e356901f8579f076e3263fb0464db7 /boards/dk-tm4c129x/freertos_demo/display_task.c | |
| parent | 990090a4cc9070837d31e66b58d40f0c3d038741 (diff) | |
Add more board models
Diffstat (limited to 'boards/dk-tm4c129x/freertos_demo/display_task.c')
| -rw-r--r-- | boards/dk-tm4c129x/freertos_demo/display_task.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/boards/dk-tm4c129x/freertos_demo/display_task.c b/boards/dk-tm4c129x/freertos_demo/display_task.c new file mode 100644 index 0000000..f2199ba --- /dev/null +++ b/boards/dk-tm4c129x/freertos_demo/display_task.c @@ -0,0 +1,329 @@ +//*****************************************************************************
+//
+// display_task.c - Task to display text and images on the LCD.
+//
+// Copyright (c) 2009-2014 Texas Instruments Incorporated. All rights reserved.
+// Software License Agreement
+//
+// Texas Instruments (TI) is supplying this software for use solely and
+// exclusively on TI's microcontroller products. The software is owned by
+// TI and/or its suppliers, and is protected under applicable copyright
+// laws. You may not combine this software with "viral" open-source
+// software in order to form a larger program.
+//
+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
+// DAMAGES, FOR ANY REASON WHATSOEVER.
+//
+// This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package.
+//
+//*****************************************************************************
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "grlib/grlib.h"
+#include "drivers/kentec320x240x16_ssd2119.h"
+#include "display_task.h"
+#include "idle_task.h"
+#include "priorities.h"
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+#include "semphr.h"
+//*****************************************************************************
+//
+// This structure defines the messages that are sent to the display task.
+//
+//*****************************************************************************
+typedef struct
+{
+ uint32_t ui32Type;
+ uint16_t ui16X;
+ uint16_t ui16Y;
+ const char *pcMessage;
+}
+
+tDisplayMessage;
+xTaskHandle g_sDisplayTask; // FIXME
+//*****************************************************************************
+//
+// The stack size for the display task.
+//
+//*****************************************************************************
+#define STACKSIZE_DISPLAYTASK 128
+
+//*****************************************************************************
+//
+// Defines to indicate the contents of the display message.
+//
+//*****************************************************************************
+#define DISPLAY_IMAGE 1
+#define DISPLAY_STRING 2
+#define DISPLAY_MOVE 3
+#define DISPLAY_DRAW 4
+
+//*****************************************************************************
+//
+// The item size, queue size, and memory size for the display message queue.
+//
+//*****************************************************************************
+#define DISPLAY_ITEM_SIZE sizeof(tDisplayMessage)
+#define DISPLAY_QUEUE_SIZE 10
+
+//*****************************************************************************
+//
+// The queue that holds messages sent to the display task.
+//
+//*****************************************************************************
+static xQueueHandle g_pDisplayQueue;
+
+//*****************************************************************************
+//
+// The most recent position of the display pen.
+//
+//*****************************************************************************
+static uint32_t g_ui32DisplayX, g_ui32DisplayY;
+
+//*****************************************************************************
+//
+// This task receives messages from the other tasks and updates the display as
+// directed.
+//
+//*****************************************************************************
+static void
+DisplayTask(void *pvParameters)
+{
+ tDisplayMessage sMessage;
+ tContext sContext;
+
+ //
+ // Initialize the graphics library context.
+ //
+ GrContextInit(&sContext, &g_sKentec320x240x16_SSD2119);
+ GrContextForegroundSet(&sContext, ClrWhite);
+ GrContextBackgroundSet(&sContext, ClrBlack);
+ GrContextFontSet(&sContext, g_psFontFixed6x8);
+
+ //
+ // Loop forever.
+ //
+ while(1)
+ {
+ //
+ // Read the next message from the queue.
+ //
+ if(xQueueReceive(g_pDisplayQueue, &sMessage, portMAX_DELAY) == pdPASS)
+ {
+ //
+ // Determine the message type.
+ //
+ switch(sMessage.ui32Type)
+ {
+ //
+ // The drawing of an image has been requested.
+ //
+ case DISPLAY_IMAGE:
+ {
+ //
+ // Draw this image on the display.
+ //
+ GrImageDraw(&sContext, (uint8_t *)sMessage.pcMessage,
+ sMessage.ui16X, sMessage.ui16Y);
+
+ //
+ // This message has been handled.
+ //
+ break;
+ }
+
+ //
+ // The drawing of a string has been requested.
+ //
+ case DISPLAY_STRING:
+ {
+ //
+ // Draw this string on the display.
+ //
+ GrStringDraw(&sContext, sMessage.pcMessage, -1,
+ sMessage.ui16X, sMessage.ui16Y, 1);
+
+ //
+ // This message has been handled.
+ //
+ break;
+ }
+
+ //
+ // A move of the pen has been requested.
+ //
+ case DISPLAY_MOVE:
+ {
+ //
+ // Save the new pen position.
+ //
+ g_ui32DisplayX = sMessage.ui16X;
+ g_ui32DisplayY = sMessage.ui16Y;
+
+ //
+ // This message has been handled.
+ //
+ break;
+ }
+
+ //
+ // A draw with the pen has been requested.
+ //
+ case DISPLAY_DRAW:
+ {
+ //
+ // Draw a line from the previous pen position to the new
+ // pen position.
+ //
+ GrLineDraw(&sContext, g_ui32DisplayX, g_ui32DisplayY,
+ sMessage.ui16X, sMessage.ui16Y);
+
+ //
+ // Save the new pen position.
+ //
+ g_ui32DisplayX = sMessage.ui16X;
+ g_ui32DisplayY = sMessage.ui16Y;
+
+ //
+ // This message has been handled.
+ //
+ break;
+ }
+ }
+ }
+ }
+}
+
+//*****************************************************************************
+//
+// Sends a request to the display task to draw an image on the display.
+//
+//*****************************************************************************
+void
+DisplayImage(uint32_t ui16X, uint32_t ui16Y, const uint8_t *pui8Image)
+{
+ tDisplayMessage sMessage;
+
+ //
+ // Construct the message to be sent.
+ //
+ sMessage.ui32Type = DISPLAY_IMAGE;
+ sMessage.ui16X = ui16X;
+ sMessage.ui16Y = ui16Y;
+ sMessage.pcMessage = (char *)pui8Image;
+
+ //
+ // Send the image draw request to the display task.
+ //
+ xQueueSend(g_pDisplayQueue, &sMessage, portMAX_DELAY);
+}
+
+//*****************************************************************************
+//
+// Sends a request to the display task to draw a string on the display.
+//
+//*****************************************************************************
+void
+DisplayString(uint32_t ui16X, uint32_t ui16Y, const char *pcString)
+{
+ tDisplayMessage sMessage;
+
+ //
+ // Construct the message to be sent.
+ //
+ sMessage.ui32Type = DISPLAY_STRING;
+ sMessage.ui16X = ui16X;
+ sMessage.ui16Y = ui16Y;
+ sMessage.pcMessage = pcString;
+
+ //
+ // Send the string draw request to the display task.
+ //
+ xQueueSend(g_pDisplayQueue, &sMessage, portMAX_DELAY);
+}
+
+//*****************************************************************************
+//
+// Sends a request to the display task to move the pen.
+//
+//*****************************************************************************
+void
+DisplayMove(uint32_t ui16X, uint32_t ui16Y)
+{
+ tDisplayMessage sMessage;
+
+ //
+ // Construct the message to be sent.
+ //
+ sMessage.ui32Type = DISPLAY_MOVE;
+ sMessage.ui16X = ui16X;
+ sMessage.ui16Y = ui16Y;
+
+ //
+ // Send the pen move request to the display task.
+ //
+ xQueueSend(g_pDisplayQueue, &sMessage, portMAX_DELAY);
+}
+
+//*****************************************************************************
+//
+// Sends a request to the display task to draw with the pen.
+//
+//*****************************************************************************
+void
+DisplayDraw(uint32_t ui16X, uint32_t ui16Y)
+{
+ tDisplayMessage sMessage;
+
+ //
+ // Construct the message to be sent.
+ //
+ sMessage.ui32Type = DISPLAY_DRAW;
+ sMessage.ui16X = ui16X;
+ sMessage.ui16Y = ui16Y;
+
+ //
+ // Send the pen draw request to the display task.
+ //
+ xQueueSend(g_pDisplayQueue, &sMessage, portMAX_DELAY);
+}
+
+//*****************************************************************************
+//
+// Initializes the display task.
+//
+//*****************************************************************************
+uint32_t
+DisplayTaskInit(void)
+{
+ //
+ // Create a queue for sending messages to the display task.
+ //
+ g_pDisplayQueue = xQueueCreate(DISPLAY_QUEUE_SIZE, DISPLAY_ITEM_SIZE);
+ if(g_pDisplayQueue == NULL)
+ {
+ return(1);
+ }
+
+ //
+ // Create the display task.
+ //
+ if(xTaskCreate(DisplayTask, (signed portCHAR *)"Display",
+ STACKSIZE_DISPLAYTASK, NULL,
+ tskIDLE_PRIORITY + PRIORITY_DISPLAY_TASK, &g_sDisplayTask) != pdTRUE)
+ { // FIXME
+ return(1);
+ }
+
+ //
+ // Success.
+ //
+ return(0);
+}
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