Semihosted file handles for targets without DEVICE_SEMIHOST or DEVICE_LOCALFILESYSTEM
mbed_semihost_api_shim.c
- Committer:
- devanlai
- Date:
- 2017-10-11
- Revision:
- 0:d5e731da01f0
File content as of revision 0:d5e731da01f0:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "cmsis.h" #include "mbed_semihost_api_shim.h" #include <stdint.h> #include <string.h> // ARM Semihosting Commands #define SYS_OPEN (0x1) #define SYS_CLOSE (0x2) #define SYS_WRITE (0x5) #define SYS_READ (0x6) #define SYS_ISTTY (0x9) #define SYS_SEEK (0xa) #define SYS_ENSURE (0xb) #define SYS_FLEN (0xc) #define SYS_REMOVE (0xe) #define SYS_RENAME (0xf) #define SYS_EXIT (0x18) #if !DEVICE_LOCALFILESYSTEM FILEHANDLE semihost_open(const char* name, int openmode) { uint32_t args[3]; args[0] = (uint32_t)name; args[1] = (uint32_t)openmode; args[2] = (uint32_t)strlen(name); return __semihost(SYS_OPEN, args); } int semihost_close(FILEHANDLE fh) { return __semihost(SYS_CLOSE, &fh); } int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) { if (length == 0) return 0; uint32_t args[3]; args[0] = (uint32_t)fh; args[1] = (uint32_t)buffer; args[2] = (uint32_t)length; return __semihost(SYS_WRITE, args); } int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) { uint32_t args[3]; args[0] = (uint32_t)fh; args[1] = (uint32_t)buffer; args[2] = (uint32_t)length; return __semihost(SYS_READ, args); } int semihost_istty(FILEHANDLE fh) { return __semihost(SYS_ISTTY, &fh); } int semihost_seek(FILEHANDLE fh, long position) { uint32_t args[2]; args[0] = (uint32_t)fh; args[1] = (uint32_t)position; return __semihost(SYS_SEEK, args); } int semihost_ensure(FILEHANDLE fh) { return __semihost(SYS_ENSURE, &fh); } long semihost_flen(FILEHANDLE fh) { return __semihost(SYS_FLEN, &fh); } int semihost_remove(const char *name) { uint32_t args[2]; args[0] = (uint32_t)name; args[1] = (uint32_t)strlen(name); return __semihost(SYS_REMOVE, args); } int semihost_rename(const char *old_name, const char *new_name) { uint32_t args[4]; args[0] = (uint32_t)old_name; args[1] = (uint32_t)strlen(old_name); args[0] = (uint32_t)new_name; args[1] = (uint32_t)strlen(new_name); return __semihost(SYS_RENAME, args); } #endif