Yihui Xiong / mbed-src-nrf51822

customized mbed library sources for nrf51822

Dependents:   Grove_Node Potentiometer BLE_Beacon I2C_Scanner

common/semihost_api.c@0:700cadd8b708, 2014-11-04 (annotated)

Committer:
yihui
Date:
Tue Nov 04 07:38:53 2014 +0000
Revision:
0:700cadd8b708
customized mbed-src library for nrf51822

Who changed what in which revision?

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yihui 0:700cadd8b708 1 /* mbed Microcontroller Library
yihui 0:700cadd8b708 2 * Copyright (c) 2006-2013 ARM Limited
yihui 0:700cadd8b708 3 *
yihui 0:700cadd8b708 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 0:700cadd8b708 5 * you may not use this file except in compliance with the License.
yihui 0:700cadd8b708 6 * You may obtain a copy of the License at
yihui 0:700cadd8b708 7 *
yihui 0:700cadd8b708 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 0:700cadd8b708 9 *
yihui 0:700cadd8b708 10 * Unless required by applicable law or agreed to in writing, software
yihui 0:700cadd8b708 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 0:700cadd8b708 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 0:700cadd8b708 13 * See the License for the specific language governing permissions and
yihui 0:700cadd8b708 14 * limitations under the License.
yihui 0:700cadd8b708 15 */
yihui 0:700cadd8b708 16 #include "cmsis.h"
yihui 0:700cadd8b708 17 #include "semihost_api.h"
yihui 0:700cadd8b708 18
yihui 0:700cadd8b708 19 #include <stdint.h>
yihui 0:700cadd8b708 20 #include <string.h>
yihui 0:700cadd8b708 21
yihui 0:700cadd8b708 22 #if DEVICE_SEMIHOST
yihui 0:700cadd8b708 23
yihui 0:700cadd8b708 24 // ARM Semihosting Commands
yihui 0:700cadd8b708 25 #define SYS_OPEN (0x1)
yihui 0:700cadd8b708 26 #define SYS_CLOSE (0x2)
yihui 0:700cadd8b708 27 #define SYS_WRITE (0x5)
yihui 0:700cadd8b708 28 #define SYS_READ (0x6)
yihui 0:700cadd8b708 29 #define SYS_ISTTY (0x9)
yihui 0:700cadd8b708 30 #define SYS_SEEK (0xa)
yihui 0:700cadd8b708 31 #define SYS_ENSURE (0xb)
yihui 0:700cadd8b708 32 #define SYS_FLEN (0xc)
yihui 0:700cadd8b708 33 #define SYS_REMOVE (0xe)
yihui 0:700cadd8b708 34 #define SYS_RENAME (0xf)
yihui 0:700cadd8b708 35 #define SYS_EXIT (0x18)
yihui 0:700cadd8b708 36
yihui 0:700cadd8b708 37 // mbed Semihosting Commands
yihui 0:700cadd8b708 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
yihui 0:700cadd8b708 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
yihui 0:700cadd8b708 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
yihui 0:700cadd8b708 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
yihui 0:700cadd8b708 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
yihui 0:700cadd8b708 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
yihui 0:700cadd8b708 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
yihui 0:700cadd8b708 45
yihui 0:700cadd8b708 46 #if DEVICE_LOCALFILESYSTEM
yihui 0:700cadd8b708 47 FILEHANDLE semihost_open(const char* name, int openmode) {
yihui 0:700cadd8b708 48 uint32_t args[3];
yihui 0:700cadd8b708 49 args[0] = (uint32_t)name;
yihui 0:700cadd8b708 50 args[1] = (uint32_t)openmode;
yihui 0:700cadd8b708 51 args[2] = (uint32_t)strlen(name);
yihui 0:700cadd8b708 52 return __semihost(SYS_OPEN, args);
yihui 0:700cadd8b708 53 }
yihui 0:700cadd8b708 54
yihui 0:700cadd8b708 55 int semihost_close(FILEHANDLE fh) {
yihui 0:700cadd8b708 56 return __semihost(SYS_CLOSE, &fh);
yihui 0:700cadd8b708 57 }
yihui 0:700cadd8b708 58
yihui 0:700cadd8b708 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
yihui 0:700cadd8b708 60 if (length == 0) return 0;
yihui 0:700cadd8b708 61
yihui 0:700cadd8b708 62 uint32_t args[3];
yihui 0:700cadd8b708 63 args[0] = (uint32_t)fh;
yihui 0:700cadd8b708 64 args[1] = (uint32_t)buffer;
yihui 0:700cadd8b708 65 args[2] = (uint32_t)length;
yihui 0:700cadd8b708 66 return __semihost(SYS_WRITE, args);
yihui 0:700cadd8b708 67 }
yihui 0:700cadd8b708 68
yihui 0:700cadd8b708 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
yihui 0:700cadd8b708 70 uint32_t args[3];
yihui 0:700cadd8b708 71 args[0] = (uint32_t)fh;
yihui 0:700cadd8b708 72 args[1] = (uint32_t)buffer;
yihui 0:700cadd8b708 73 args[2] = (uint32_t)length;
yihui 0:700cadd8b708 74 return __semihost(SYS_READ, args);
yihui 0:700cadd8b708 75 }
yihui 0:700cadd8b708 76
yihui 0:700cadd8b708 77 int semihost_istty(FILEHANDLE fh) {
yihui 0:700cadd8b708 78 return __semihost(SYS_ISTTY, &fh);
yihui 0:700cadd8b708 79 }
yihui 0:700cadd8b708 80
yihui 0:700cadd8b708 81 int semihost_seek(FILEHANDLE fh, long position) {
yihui 0:700cadd8b708 82 uint32_t args[2];
yihui 0:700cadd8b708 83 args[0] = (uint32_t)fh;
yihui 0:700cadd8b708 84 args[1] = (uint32_t)position;
yihui 0:700cadd8b708 85 return __semihost(SYS_SEEK, args);
yihui 0:700cadd8b708 86 }
yihui 0:700cadd8b708 87
yihui 0:700cadd8b708 88 int semihost_ensure(FILEHANDLE fh) {
yihui 0:700cadd8b708 89 return __semihost(SYS_ENSURE, &fh);
yihui 0:700cadd8b708 90 }
yihui 0:700cadd8b708 91
yihui 0:700cadd8b708 92 long semihost_flen(FILEHANDLE fh) {
yihui 0:700cadd8b708 93 return __semihost(SYS_FLEN, &fh);
yihui 0:700cadd8b708 94 }
yihui 0:700cadd8b708 95
yihui 0:700cadd8b708 96 int semihost_remove(const char *name) {
yihui 0:700cadd8b708 97 uint32_t args[2];
yihui 0:700cadd8b708 98 args[0] = (uint32_t)name;
yihui 0:700cadd8b708 99 args[1] = (uint32_t)strlen(name);
yihui 0:700cadd8b708 100 return __semihost(SYS_REMOVE, args);
yihui 0:700cadd8b708 101 }
yihui 0:700cadd8b708 102
yihui 0:700cadd8b708 103 int semihost_rename(const char *old_name, const char *new_name) {
yihui 0:700cadd8b708 104 uint32_t args[4];
yihui 0:700cadd8b708 105 args[0] = (uint32_t)old_name;
yihui 0:700cadd8b708 106 args[1] = (uint32_t)strlen(old_name);
yihui 0:700cadd8b708 107 args[0] = (uint32_t)new_name;
yihui 0:700cadd8b708 108 args[1] = (uint32_t)strlen(new_name);
yihui 0:700cadd8b708 109 return __semihost(SYS_RENAME, args);
yihui 0:700cadd8b708 110 }
yihui 0:700cadd8b708 111 #endif
yihui 0:700cadd8b708 112
yihui 0:700cadd8b708 113 int semihost_exit(void) {
yihui 0:700cadd8b708 114 uint32_t args[4];
yihui 0:700cadd8b708 115 return __semihost(SYS_EXIT, args);
yihui 0:700cadd8b708 116 }
yihui 0:700cadd8b708 117
yihui 0:700cadd8b708 118 int semihost_uid(char *uid) {
yihui 0:700cadd8b708 119 uint32_t args[2];
yihui 0:700cadd8b708 120 args[0] = (uint32_t)uid;
yihui 0:700cadd8b708 121 args[1] = DEVICE_ID_LENGTH + 1;
yihui 0:700cadd8b708 122 return __semihost(USR_UID, &args);
yihui 0:700cadd8b708 123 }
yihui 0:700cadd8b708 124
yihui 0:700cadd8b708 125 int semihost_reset(void) {
yihui 0:700cadd8b708 126 // Does not normally return, however if used with older firmware versions
yihui 0:700cadd8b708 127 // that do not support this call it will return -1.
yihui 0:700cadd8b708 128 return __semihost(USR_RESET, NULL);
yihui 0:700cadd8b708 129 }
yihui 0:700cadd8b708 130
yihui 0:700cadd8b708 131 int semihost_vbus(void) {
yihui 0:700cadd8b708 132 return __semihost(USR_VBUS, NULL);
yihui 0:700cadd8b708 133 }
yihui 0:700cadd8b708 134
yihui 0:700cadd8b708 135 int semihost_powerdown(void) {
yihui 0:700cadd8b708 136 return __semihost(USR_POWERDOWN, NULL);
yihui 0:700cadd8b708 137 }
yihui 0:700cadd8b708 138
yihui 0:700cadd8b708 139 #if DEVICE_DEBUG_AWARENESS
yihui 0:700cadd8b708 140
yihui 0:700cadd8b708 141 int semihost_connected(void) {
yihui 0:700cadd8b708 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
yihui 0:700cadd8b708 143 }
yihui 0:700cadd8b708 144
yihui 0:700cadd8b708 145 #else
yihui 0:700cadd8b708 146 // These processors cannot know if the interface is connect, assume so:
yihui 0:700cadd8b708 147 static int is_debugger_attached = 1;
yihui 0:700cadd8b708 148
yihui 0:700cadd8b708 149 int semihost_connected(void) {
yihui 0:700cadd8b708 150 return is_debugger_attached;
yihui 0:700cadd8b708 151 }
yihui 0:700cadd8b708 152 #endif
yihui 0:700cadd8b708 153
yihui 0:700cadd8b708 154 int semihost_disabledebug(void) {
yihui 0:700cadd8b708 155 #if !(DEVICE_DEBUG_AWARENESS)
yihui 0:700cadd8b708 156 is_debugger_attached = 0;
yihui 0:700cadd8b708 157 #endif
yihui 0:700cadd8b708 158 return __semihost(USR_DISABLEDEBUG, NULL);
yihui 0:700cadd8b708 159 }
yihui 0:700cadd8b708 160
yihui 0:700cadd8b708 161 #endif
yihui 0:700cadd8b708 162