Difference between revisions of "WM Timer (Sample)"
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Latest revision as of 13:54, 22 April 2020
WM_SimpleTimer.c | |
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File(s) required |
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Runs in simulation | Yes |
Runs on target | Yes |
Download | WM_SimpleTimer.c |
This sample demonstrates the use of Window Manager timers.
Code
/*********************************************************************
* SEGGER Microcontroller GmbH *
* Solutions for real time microcontroller applications *
**********************************************************************
* *
* (c) 1996 - 2020 SEGGER Microcontroller GmbH *
* *
* Internet: www.segger.com Support: support@segger.com *
* *
**********************************************************************
** emWin V6.10 - Graphical user interface for embedded applications **
emWin is protected by international copyright laws. Knowledge of the
source code may not be used to write a similar product. This file may
only be used in accordance with a license and should not be re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File : WM_SimpleTimer.c
Purpose : Sample that demonstrates how to use timers with the
WindowManager in emWin.
Requirements: WindowManager - (x)
MemoryDevices - ( )
AntiAliasing - ( )
VNC-Server - ( )
PNG-Library - ( )
TrueTypeFonts - ( )
---------------------------END-OF-HEADER------------------------------
*/
#include "DIALOG.h"
#include <stdio.h>
/*********************************************************************
*
* Static code
*
**********************************************************************
*/
#define ID_TIMER 0
#define PERIOD 500
/*********************************************************************
*
* _cbWin
*/
static void _cbWin(WM_MESSAGE * pMsg) {
int Id;
char acString[64];
static WM_HTIMER hTimer; // Timer handle has to be static
static int Counter;
switch (pMsg->MsgId) {
case WM_CREATE:
//
// Create timer handle
//
// Mode (unused, should be 0) ----------------------+
// Duration ---------------------------------+ |
// User-defined ID -----------------+ | |
// Window to be informed -+ | | |
// | | | |
hTimer = WM_CreateTimer(pMsg->hWin, ID_TIMER, PERIOD, 0);
break;
case WM_PAINT:
//
// This case is called everytime the window has to be redrawn
//
GUI_SetBkColor(GUI_WHITE);
GUI_Clear();
GUI_SetColor(GUI_BLACK);
sprintf(acString, "The timer has expired %d times.", Counter);
GUI_DispStringAt(acString, 10, 10);
//
if (hTimer == 0) {
GUI_DispStringAt("The timer has been deleted.", 10, 30);
}
break;
case WM_TIMER: // When a timer expires, a WM_TIMER message is sent to the window
Id = WM_GetTimerId(pMsg->Data.v); // The handle of the timer that expired is sent via the data value of the message.
switch (Id) {
case ID_TIMER:
Counter++;
if (Counter < 10) {
//
// Restart the timer
//
WM_RestartTimer(hTimer, PERIOD);
}
else {
//
// Delete the timer
//
WM_DeleteTimer(hTimer);
hTimer = 0;
}
WM_InvalidateWindow(pMsg->hWin);
break;
}
break;
default:
WM_DefaultProc(pMsg);
break;
}
}
/*********************************************************************
*
* Public code
*
**********************************************************************
*/
/*********************************************************************
*
* MainTask
*/
void MainTask(void) {
GUI_Init();
//
// Create a window
//
WM_CreateWindowAsChild(0, 0, LCD_GetXSize(), LCD_GetYSize(), WM_HBKWIN, WM_CF_SHOW, _cbWin, 0);
while (1) {
GUI_Delay(100);
}
}
/*************************** End of file ****************************/