www.pudn.com > iccavrUCOS_m64.rar > os_cpu._h

/* 
 ********************************************************************************************************* 
 *                                               uC/OS-II 
 *                                         The Real-Time Kernel 
 * 
 *                                        ATmega103 Specific code 
 * 
 * File     : OS_CPU.H 
 * By       : Ole Saether 
 * 
 * $Revision: 1 $ 
 * 
 ********************************************************************************************************* 
*/ 
 
#include  
 
#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                   */ 
 
#define uint8 	unsigned char; 
#define uint16  unsigned int;  
/* 
********************************************************************************************************** 
*                                       Atmel AVR 
* 
* 
* Method #1:  Disable/Enable interrupts using simple instructions.  After critical section, interrupts 
*             will be enabled even if they were disabled before entering the critical section. 
* 
* Method #2:  Disable/Enable interrupts by preserving the state of interrupts. In other words, if 
*             interrupts were disabled before entering the critical section, they will be disabled when 
*             leaving the critical section. The IAR compiler does not support inline assembly so I'm 
*             using the _OPC() intrinsic function. Here are the instructions: 
* 
*             OS_ENTER_CRITICAL: 
* 
*               ST      -Y,R16 
*               IN      R16,SREG 
*               CLI 
*               PUSH    R16 
*               LD      R16,Y+ 
* 
*             OS_EXIT_CRITICAL: 
* 
*               ST      -Y,R16 
*               POP     R16 
*               OUT     SREG,R16 
*               LD      R16,Y+ 
* 
********************************************************************************************************** 
*/ 
#define  OS_CRITICAL_METHOD    2 
 
#if      OS_CRITICAL_METHOD == 1 
#define  OS_ENTER_CRITICAL()    CLI()              /* Disable interrupts                               */ 
#define  OS_EXIT_CRITICAL()     SEI()              /* Enable  interrupts                               */ 
#endif 
 
#if      OS_CRITICAL_METHOD == 2 
#define  OS_ENTER_CRITICAL()    asm("st -y,r16\nin r16,0x3F\ncli\npush r16\nld r16,y+"); 
#define  OS_EXIT_CRITICAL()     asm("st -y,r16\npop r16\nout 0x3F,r16\nld r16,y+"); 
//#define  OS_EXIT_CRITICAL()     asm("st -y,r16\npop r16\nout 0x3F,r16\nsei\nld r16,y+"); 
//#define  OS_ENTER_CRITICAL()      CLI() 
//#define  OS_EXIT_CRITICAL()       SEI() 
#endif 
 
/* 
********************************************************************************************************** 
*                           AVR Miscellaneous 
********************************************************************************************************** 
*/ 
 
#define  OS_STK_GROWTH      1                       /* Stack grows from HIGH to LOW memory on AVR       */ 
 
#define  OS_TASK_SW()       OSCtxSw()