os_cpu.h

来自「ucos2在凌阳61上的移植,用软中继实现调度」· C头文件 代码 · 共 38 行

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


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

typedef unsigned short    BOOLEAN;
typedef unsigned short    INT8U;
typedef signed   short    INT8S;
typedef unsigned int      INT16U;
typedef signed   int      INT16S;
typedef unsigned long     INT32U;
typedef signed   long     INT32S;
typedef float             FP32;
typedef double            FP64;


typedef unsigned int      OS_STK;


//  关中断
#define  OS_ENTER_CRITICAL()  __asm__("INT OFF \n\t")

// 开中断

#define  OS_EXIT_CRITICAL()  __asm__("INT IRQ \n\t" "INT FIQ \n\t")

//  任务堆栈的生长方式与系统堆栈相反，  为由下至上

#define  OS_STK_GROWTH    1

//  任务切换，软中断指令 BREAK

#define  OS_TASK_SW()     __asm__("BREAK\n\t")