systemtasks.c

一个完整的rtos源代码.运行在嵌入80186 cpu上.提供4个任务,信号灯,定时器,schedule等.

/* **************************************************************************************
 *  Copyright (c) 2002 ZORAN Corporation, All Rights Reserved
 *  THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF ZORAN CORPORATION
 *
 *  File: $Workfile: SystemTasks.c $             
 *
 * Description:
 * ============
 * System-Tasks definition, allocation, and initialization.
 * 
 * Log:
 * ====
 * $Revision: 11 $
 * Last Modified by $Author: Kennyz $ at $Modtime: 03-12-22 22:41 $ 
 ****************************************************************************************
 * Updates:
 ****************************************************************************************
 * $Log: /SourceCode/I64_Customer/I64_OPV/Kernel/SystemTasks.c $
 * 
 * 11    03-12-22 22:57 Kennyz
 * Modified for UI task in GUI project.
 * 
 * 10    10/10/03 8:58a Tomasp
 * Fix wrong CORE stack pointer initialization
 * 
 * 9     03-06-03 11:25 Jerryc
 * change the core task stack bottom to be 0x4ff0.
 * 
 * 8     03-04-17 11:57 Jerryc
 * hard code the position of core task's stack for
 * sharing reflasher burner APIS with capture_logo and store_ps_in_flash
 * features.
 * 
 * 18    23/04/02 9:26 Nirm
 * - Added dependency in "Config.h".
 * 
 * 17    4/02/02 7:38a Tomasp
 * Removed double UI task initialization.
 * 
 * 16    31/03/02 23:16 Nirm
 * - Added installation of the Drive-Driver Task.
 * 
 * 15    27/03/02 13:25 Nirm
 * - System-Tasks creation and initialization.
 **************************************************************************************** */

#include "Config.h"		// Global Configuration - do not remove!

#include "Include\SysDefs.h"
#include "Kernel\Ker_API.h"
#include "Kernel\SystemTasks.h"
#include "Kernel\uITRON\RTOS.h"

#include "Playcore\Coremain\Coremain.h"
#ifdef _DEBUG
#include "Debug\dbgmain.h"
#endif

/////////////////////////////////////////////////////////////////////////////
// Constants and Enumerations

// Task Stacks
#define DEFAULT_STACK_SIZE		0x800	// Bytes

#ifdef D_OPV
#define CORE_STACK_SZ			(DEFAULT_STACK_SIZE)
#else
#define CORE_STACK_SZ			DEFAULT_STACK_SIZE
#endif // D_OPV

#ifdef D_OPV
#define UI_STACK_SZ				(DEFAULT_STACK_SIZE)
#else
#define UI_STACK_SZ				DEFAULT_STACK_SIZE
#endif // D_OPV

#ifdef _DEBUG
#define DEBUG_STACK_SZ			(DEFAULT_STACK_SIZE / 2)
#endif

// Task Time-Slices (in ms)
#ifdef _DEBUG
#define DEBUG_TASK_SLICE_MS			2
#endif
#define CORE_TASK_SLICE_MS				6
#define UI_TASK_SLICE_MS				2
#define DRIVEDRIVER_TASK_SLICE_MS	4

/////////////////////////////////////////////////////////////////////////////
// Globals

// Task Stacks
#define MK_FP(seg,ofs) ((void __seg *)(seg) + (void __near *)(ofs))
//<<<Tomas.Pacha_1009_2003_A: Fix wrong CORE stack pointer initialization
#define CORE_STACK_BOTTOM MK_FP(0x0000, 0x5000)
//<<<Tomas.Pacha_1009_2003_A: Fix wrong CORE stack pointer initialization
static BYTE g_UI_Stack[UI_STACK_SZ];
#ifdef _DEBUG
static BYTE g_Debug_Stack[DEBUG_STACK_SZ];
#endif
/////////////////////////////////////////////////////////////////////////////
// Implementation

void Ker_createSystemTasks(void)
{
#ifdef _TIME_SLICE_
  	init_rtos((ID)DRIVEDRIVER_TASK_ID, (PRI)DRIVEDRIVER_TASK_PRIORITY, 
			  (DRIVEDRIVER_TASK_SLICE_MS / RTOS_TICK_MS));

	init_task((ID)CORE_TASK_ID, (T_CONTEXT *)CORE_STACK_BOTTOM, (FP)core_dispatch,
			  (PRI)CORE_TASK_PRIORITY, (CORE_TASK_SLICE_MS / RTOS_TICK_MS));


	init_task((ID)UI_TASK_ID, (T_CONTEXT *)&g_UI_Stack[UI_STACK_SZ], (FP)ui_dispatch, 
			  (PRI)UI_TASK_PRIORITY, (UI_TASK_SLICE_MS / RTOS_TICK_MS));

#ifdef _DEBUG
	init_task((ID)DEBUG_TASK_ID, (T_CONTEXT *)&g_Debug_Stack[DEBUG_STACK_SZ], 
			  (FP)debug_root_menu, (PRI)DEBUG_TASK_PRIORITY, (DEBUG_TASK_SLICE_MS / RTOS_TICK_MS));
#endif       
#else
  	init_rtos((ID)DRIVEDRIVER_TASK_ID, (PRI)DRIVEDRIVER_TASK_PRIORITY);

	init_task((ID)CORE_TASK_ID, (T_CONTEXT *)&g_Core_Stack[CORE_STACK_SZ], (FP)core_dispatch, 
			  (PRI)CORE_TASK_PRIORITY);

	init_task((ID)UI_TASK_ID, (T_CONTEXT *)&g_UI_Stack[UI_STACK_SZ], (FP)ui_dispatch, 
			  (PRI)UI_TASK_PRIORITY);

#ifdef _DEBUG
	init_task((ID)DEBUG_TASK_ID, (T_CONTEXT *)&g_Debug_Stack[DEBUG_STACK_SZ], 
			  (FP)debug_root_menu, (PRI)DEBUG_TASK_PRIORITY);
#endif       
#endif //_TIME_SLICE_
	return;
}


void Ker_startSystemTasks(void)
{
	sta_tsk((ID)CORE_TASK_ID, (INT)0);
	sta_tsk((ID)UI_TASK_ID, (INT)0);
#ifdef _DEBUG
	sta_tsk((ID)DEBUG_TASK_ID, (INT)0);
#endif   
	return;
}