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楼主 |
发表于 2009-9-26 21:04:26
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谢谢楼上的Zwill 的回复
您说的重定义是什么意思啊
整个源文件是这样的 OS_CPU.H 您能不能帮我看看啊 谢谢
/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
* ATmega128 Specific code
*
* File : OS_CPU.H
* By : Ole Saether
* Jean J. Labrosse
*********************************************************************************************************
*/
#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) */
/*
*********************************************************************************************************
* 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+
*
* Method #3: Disable/Enable interrupts by preserving the state of interrupts. Generally speaking you
* would store the state of the interrupt disable flag in the local variable 'cpu_sr' and then
* disable interrupts. 'cpu_sr' is allocated in all of uC/OS-II's functions that need to
* disable interrupts. You would restore the interrupt disable state by copying back 'cpu_sr'
* into the CPU's status register.
*********************************************************************************************************
*/
#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
void OSTickISR_Init(void);
void OSTickISR_Handler(void); |
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发表于 2009-9-26 20:55:24
