os_cpu.h

在ARM7和UC/OSII的平台上实现了GPS自动报站的功能,涉及GPS模块LEA_4S的驱动,位置速寻算法,语音芯片ISD4004的录放音驱动,LED页面管理等等.从启动代码到操作系统的移植以及到业

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                        The Real-Time Kernel
*
*                        (c) Copyright 1992-1998, Jean J. Labrosse, Plantation, FL
*                                          All Rights Reserved
*                        (c) Copyright ARM Limited 1999.  All rights reserved.
*
*                                          ARM Specific code
*
* File : OS_CPU.H
*
*********************************************************************************************************
*/

#ifndef DEF_OS_CPU
#define DEF_OS_CPU

#ifdef  OS_CPU_GLOBALS
#define OS_CPU_EXT
#else
#define OS_CPU_EXT  extern
#endif


typedef unsigned int   OS_STK;                   /* Each stack entry is 16-bit wide                    */

/*
*********************************************************************************************************
*                              ARM, various architectures
*
*********************************************************************************************************
*/
#define OS_ENTER_CRITICAL() ARMDisableInt()      
#define OS_EXIT_CRITICAL()  ARMEnableInt()       
 
/* stack stuff */
#define OS_STK_GROWTH    1         //define the stack to grow from high to low

/* idle task stack size (words) */
#ifdef SEMIHOSTED
#define OS_IDLE_STK_SIZE        (64+SEMIHOSTED_STACK_NEEDS)
#else
#define OS_IDLE_STK_SIZE        64
#endif


/* defined in os_cpu_a.s */
extern void OS_TASK_SW(void);           // task switch routine
extern void OSIntCtxSw(void);           // interrupt context switch
extern void ARMDisableInt(void);        // disable global interrupts
extern void ARMEnableInt(void);         // enable global interrupts
extern void OSTickISR(void);		// timer interrupt routine

#endif /*DEF_OS_CPU*/