os_cpu.h~

源代码实现的是uC/OS-II在ATmega128L上的移植

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

/*
**********************************************************************************************************
*                                              DATA TYPES
*                                         (Compiler Specific)
**********************************************************************************************************
*/

typedef unsigned char  BOOLEAN;
typedef unsigned char  INT8U;                    /* Unsigned  8 bit quantity                            */
typedef signed   char  INT8S;                    /* Signed    8 bit quantity                            */
typedef unsigned int   INT16U;                   /* Unsigned 16 bit quantity                            */
typedef signed   int   INT16S;                   /* Signed   16 bit quantity                            */
typedef unsigned long  INT32U;                   /* Unsigned 32 bit quantity                            */
typedef signed   long  INT32S;                   /* Signed   32 bit quantity                            */
typedef float          FP32;                     /* Single precision floating point                     */

typedef unsigned char  OS_STK;                   /* Each stack entry is 8-bit wide                      */
typedef unsigned char  OS_CPU_SR;                /* Define size of CPU status register (PSW = 8 bits)   */

#define  OS_CRITICAL_METHOD    3

#if      OS_CRITICAL_METHOD == 3
#define  OS_ENTER_CRITICAL()  (cpu_sr = OS_CPU_SR_Save()) /* Disable interrupts                        */
#define  OS_EXIT_CRITICAL()   (OS_CPU_SR_Restore(cpu_sr)) /* Enable  interrupts                        */
#endif

/*
**********************************************************************************************************
*                                          AVR Miscellaneous
**********************************************************************************************************
*/

#define  OS_STK_GROWTH      1                       /* Stack grows from HIGH to LOW memory on AVR       */

#define  OS_TASK_SW()       OSCtxSw()

/*
**********************************************************************************************************
*                                          GLOBAL VARIABLES
**********************************************************************************************************
*/

OS_CPU_EXT  INT16U  OSTaskStkSize;                  /* Used to set the total stack size of a task       */
OS_CPU_EXT  INT16U  OSTaskHardStkSize;              /* Used to set the hardware stack size of a task    */

/*
**********************************************************************************************************
*                                         Function Prototypes
**********************************************************************************************************
*/
#if OS_CRITICAL_METHOD == 3
OS_CPU_SR  OS_CPU_SR_Save(void);
void       OS_CPU_SR_Restore(OS_CPU_SR cpu_sr);
#endif

//extern void OSTickISR_Init(void);
//extern void OSTickISR_Handler(void);
//以上两个声明的函数定义在timer0.c中