semihosting.h.svn-base

lwip协议在arm7+uCos系统上的移植

/***************************************************************************
  文件名称：semihosting.h
  版本号：	1.0
  日期：	2005-12-15
  说明：	在C中使用semihosting功能的调用函数，具体每种调用的功能参考
            ADS1.2 Debugger Target Guide
  调用列表：--
  修改历史：--
*****************************************************************************/

#define SemiSWI 0x123456		//the SWI number of the semihosting in ARM instruction
__swi(SemiSWI) int Semihosting(unsigned op, void *c);	//op determine the type of the semihosting SWI, c point the parameter will be used

#define Sem_Open(c)  	Semihosting(0x1, c)		//open a file on the host
#define Sem_Close(c) 	Semihosting(0x2, c)		//close a file on the host
#define Sem_WriteC(c) 	Semihosting(0x3, c)		//write a character to the console
#define Sem_Write0(c) 	Semihosting(0x4, c)		//write a null-terminated string to the console
#define Sem_Write(c) 	Semihosting(0x5, c)		//write to a file on the host
#define Sem_Read(c)  	Semihosting(0x6, c)		//read the contents of a file into the buffer
#define Sem_ReadC(c)  	Semihosting(0x7, c)		//read a byte from the console
#define Sem_Iserror(c)  Semihosting(0x8, c)		//determine if a return code is an error
#define Sem_Istty(c)  	Semihosting(0x9, c)		//check whether a file is connected to an interactive device
#define Sem_Seek(c)  	Semihosting(0xa, c)		//seek to a position in a file
#define Sem_Flen(c)   	Semihosting(0xc, c)		//return the length of a file		
#define Sem_Tmpnam(c)  	Semihosting(0xd, c)		//return a temporary name of a file
#define Sem_Remove(c)  	Semihosting(0xe, c)		//remove a file from the host
#define Sem_Rename(c)  	Semihosting(0xf, c)		//rename a file on the host
#define Sem_Clock(c)  	Semihosting(0x10, c)	//number of centiseconds since execution started
#define Sem_Time(c)  	Semihosting(0x11, c)	//number of seconds since January 1,1970
#define Sem_System(c)  	Semihosting(0x12, c)	//pass a command to the host command-line interpreter
#define Sem_Errno(c)  	Semihosting(0x13, c)	//get the value of C library errno variable
#define Sem_GetCmdline(c)  	Semihosting(0x15, c)	//get the command line use to call the executable
#define Sem_Heapinfo(c)  	Semihosting(0x16, c)	//get the system heap parameters
#define Sem_Elapsed(c)  	Semihosting(0x30, c)	//get the number of target ticks since execution started
#define Sem_Tickfreq(c)  	Semihosting(0x31, c)	//determine the tick frequency