os_18c801_c.c

本人编写的无线电话程序,给予PIC18C801设计,包括了uCOS的移植以及菜单,自己设计的拼音注入法,完整地一级汉字库,希望对大家有所帮助

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                         The Real-Time Kernel
*
	incf	STKPTR	
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                          All Rights Reserved
	incf	STKPTR	
*
*
*                                       Microchip PIC18C801 Specific code
*
* File:			OS_CPU_C.C
* By:	 		Jean J. Labrosse
* Appended by:	Weiming Zhang
*********************************************************************************************************
*/

#define  OS_CPU_GLOBALS
#include "includes.h"

extern void	OSCtxSw(void);
//unsigned char DebugReadLength;
//rom unsigned char *DebugReadAddr;
//unsigned char DebugContent[32];

//Only used by myself (Weiming Zhang)
unsigned char OSSysStkBase;	
unsigned char StackDepth[OS_LOWEST_PRIO+1][2];

/*
*********************************************************************************************************
*                                        INITIALIZE A TASK'S STACK
*
* Description: This function is called by either OSTaskCreate() or OSTaskCreateExt() to initialize the
*              stack frame of the task being created.  This function is highly processor specific.
*
* Arguments  : task          is a pointer to the task code
*
*              pdata         is a pointer to a user supplied data area that will be passed to the task
*                            when the task first executes.
*
*              ptos          is a pointer to the top of stack.  It is assumed that 'ptos' points to
*                            a 'free' entry on the task stack.  If OS_STK_GROWTH is set to 1 then 
*                            'ptos' will contain the HIGHEST valid address of the stack.  Similarly, if
*                            OS_STK_GROWTH is set to 0, the 'ptos' will contains the LOWEST valid address
*                            of the stack.
*
*              opt           specifies options that can be used to alter the behavior of OSTaskStkInit().
*                            (see uCOS_II.H for OS_TASK_OPT_???).
*
* Returns    : Always returns the location of the new top-of-stack' once the processor registers have
*              been placed on the stack in the proper order.
*
* Note(s)    : Interrupts are enabled when your task starts executing. You can change this by setting the
*              PSW to 0x0002 instead.  In this case, interrupts would be disabled upon task startup.  The
*              application code would be responsible for enabling interrupts at the beginning of the task
*              code.  You will need to modify OSTaskIdle() and OSTaskStat() so that they enable 
*              interrupts.  Failure to do this will make your system crash!
*********************************************************************************************************
*/

rom INT8U *OSTaskStkInit (void (*task)(void *pd), void *pdata, rom INT8U *ptos, INT16U task_prio)
{
	rom far unsigned char *stkptr;

	stkptr=ptos;								//return value is the stack's start-address,not TOS
	
	StackDepth[task_prio][0]=1;
	StackDepth[task_prio][1]=TOTAL_SFR_NUM+1;	//Only 13(not 16) SFRs,plus a filled-byte,
												// to ensure FSR1L=OSSysStkBase at the beginning
	
	*(ptos++)=((unsigned long)task) & 0xFF;
	*(ptos++)=((unsigned long)task>>8) & 0xFF;
	*ptos=((unsigned long)task>>16) & 0xFF;

	ptos=stkptr+EXT_SOFT_STK_SHIFT;	
	*(ptos++)=0xee;					//filled-byte
	ptos++;							//STATUS
	ptos++;							//BSR
	ptos++;							//WREG
	*(ptos++)=FSR2H;				//FSR2H
	*(ptos++)=0;					//FSR2L
//	*(ptos++)=FSR1H;				//FSR1H
//	*(ptos++)=OSSysStkBase;			//FSR1L	
	ptos++;							//FSR0H;
	ptos++;							//FSR0L;
//	*ptos=TASK_HD_STK_PTR+1;		//STKPTR=4
	
	return(stkptr);
}


/*$PAGE*/
#if OS_CPU_HOOKS_EN
/*
*********************************************************************************************************
*                                          TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being created.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
void OSTaskCreateHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}


/*
*********************************************************************************************************
*                                           TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments  : ptcb   is a pointer to the task control block of the task being deleted.
*
* Note(s)    : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
void OSTaskDelHook (OS_TCB *ptcb)
{
    ptcb = ptcb;                       /* Prevent compiler warning                                     */
}

/*
*********************************************************************************************************
*                                           TASK SWITCH HOOK
*
* Description: This function is called when a task switch is performed.  This allows you to perform other
*              operations during a context switch.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts are disabled during this call.
*              2) It is assumed that the global pointer 'OSTCBHighRdy' points to the TCB of the task that
*                 will be 'switched in' (i.e. the highest priority task) and, 'OSTCBCur' points to the 
*                 task being switched out (i.e. the preempted task).
*********************************************************************************************************
*/
void OSTaskSwHook (void)
{
}

/*
*********************************************************************************************************
*                                           STATISTIC TASK HOOK
*
* Description: This function is called every second by uC/OS-II's statistics task.  This allows your 
*              application to add functionality to the statistics task.
*
* Arguments  : none
*********************************************************************************************************
*/
void OSTaskStatHook (void)
{
}

/*
*********************************************************************************************************
*                                               TICK HOOK
*
* Description: This function is called every tick.
*
* Arguments  : none
*
* Note(s)    : 1) Interrupts may or may not be ENABLED during this call.
*********************************************************************************************************
*/
void OSTimeTickHook (void)
{
}

//*********************************************************************************************************

void TxIntISR(void)
{
/*		PIR1bits.TXIF=0;
		if(intCurRxNum!=0){
			TXREG =*pCurTxHead ++;
			intCurTxNum--;
		}
		else chrCOMBusy=0;
*/
}
#endif