Rahul Dahiya / Mbed OS STM32F7 Ethernet

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mbed-os/platform/mbed_semihost_api.c@0:fb8047b156bb, 2020-01-15 (annotated)

Committer:
rahul_dahiya
Date:
Wed Jan 15 15:57:15 2020 +0530
Revision:
0:fb8047b156bb
STM32F7 LWIP

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rahul_dahiya 0:fb8047b156bb 1 /* mbed Microcontroller Library
rahul_dahiya 0:fb8047b156bb 2 * Copyright (c) 2006-2013 ARM Limited
rahul_dahiya 0:fb8047b156bb 3 *
rahul_dahiya 0:fb8047b156bb 4 * Licensed under the Apache License, Version 2.0 (the "License");
rahul_dahiya 0:fb8047b156bb 5 * you may not use this file except in compliance with the License.
rahul_dahiya 0:fb8047b156bb 6 * You may obtain a copy of the License at
rahul_dahiya 0:fb8047b156bb 7 *
rahul_dahiya 0:fb8047b156bb 8 * http://www.apache.org/licenses/LICENSE-2.0
rahul_dahiya 0:fb8047b156bb 9 *
rahul_dahiya 0:fb8047b156bb 10 * Unless required by applicable law or agreed to in writing, software
rahul_dahiya 0:fb8047b156bb 11 * distributed under the License is distributed on an "AS IS" BASIS,
rahul_dahiya 0:fb8047b156bb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
rahul_dahiya 0:fb8047b156bb 13 * See the License for the specific language governing permissions and
rahul_dahiya 0:fb8047b156bb 14 * limitations under the License.
rahul_dahiya 0:fb8047b156bb 15 */
rahul_dahiya 0:fb8047b156bb 16 #include "cmsis.h"
rahul_dahiya 0:fb8047b156bb 17 #include "platform/mbed_semihost_api.h"
rahul_dahiya 0:fb8047b156bb 18
rahul_dahiya 0:fb8047b156bb 19 #include <stdint.h>
rahul_dahiya 0:fb8047b156bb 20 #include <string.h>
rahul_dahiya 0:fb8047b156bb 21
rahul_dahiya 0:fb8047b156bb 22 #if DEVICE_SEMIHOST
rahul_dahiya 0:fb8047b156bb 23
rahul_dahiya 0:fb8047b156bb 24 // ARM Semihosting Commands
rahul_dahiya 0:fb8047b156bb 25 #define SYS_OPEN (0x1)
rahul_dahiya 0:fb8047b156bb 26 #define SYS_CLOSE (0x2)
rahul_dahiya 0:fb8047b156bb 27 #define SYS_WRITE (0x5)
rahul_dahiya 0:fb8047b156bb 28 #define SYS_READ (0x6)
rahul_dahiya 0:fb8047b156bb 29 #define SYS_ISTTY (0x9)
rahul_dahiya 0:fb8047b156bb 30 #define SYS_SEEK (0xa)
rahul_dahiya 0:fb8047b156bb 31 #define SYS_ENSURE (0xb)
rahul_dahiya 0:fb8047b156bb 32 #define SYS_FLEN (0xc)
rahul_dahiya 0:fb8047b156bb 33 #define SYS_REMOVE (0xe)
rahul_dahiya 0:fb8047b156bb 34 #define SYS_RENAME (0xf)
rahul_dahiya 0:fb8047b156bb 35 #define SYS_EXIT (0x18)
rahul_dahiya 0:fb8047b156bb 36
rahul_dahiya 0:fb8047b156bb 37 // mbed Semihosting Commands
rahul_dahiya 0:fb8047b156bb 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
rahul_dahiya 0:fb8047b156bb 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
rahul_dahiya 0:fb8047b156bb 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
rahul_dahiya 0:fb8047b156bb 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
rahul_dahiya 0:fb8047b156bb 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
rahul_dahiya 0:fb8047b156bb 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
rahul_dahiya 0:fb8047b156bb 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
rahul_dahiya 0:fb8047b156bb 45
rahul_dahiya 0:fb8047b156bb 46 #if DEVICE_LOCALFILESYSTEM
rahul_dahiya 0:fb8047b156bb 47 FILEHANDLE semihost_open(const char* name, int openmode) {
rahul_dahiya 0:fb8047b156bb 48 uint32_t args[3];
rahul_dahiya 0:fb8047b156bb 49 args[0] = (uint32_t)name;
rahul_dahiya 0:fb8047b156bb 50 args[1] = (uint32_t)openmode;
rahul_dahiya 0:fb8047b156bb 51 args[2] = (uint32_t)strlen(name);
rahul_dahiya 0:fb8047b156bb 52 return __semihost(SYS_OPEN, args);
rahul_dahiya 0:fb8047b156bb 53 }
rahul_dahiya 0:fb8047b156bb 54
rahul_dahiya 0:fb8047b156bb 55 int semihost_close(FILEHANDLE fh) {
rahul_dahiya 0:fb8047b156bb 56 return __semihost(SYS_CLOSE, &fh);
rahul_dahiya 0:fb8047b156bb 57 }
rahul_dahiya 0:fb8047b156bb 58
rahul_dahiya 0:fb8047b156bb 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
rahul_dahiya 0:fb8047b156bb 60 if (length == 0) return 0;
rahul_dahiya 0:fb8047b156bb 61
rahul_dahiya 0:fb8047b156bb 62 uint32_t args[3];
rahul_dahiya 0:fb8047b156bb 63 args[0] = (uint32_t)fh;
rahul_dahiya 0:fb8047b156bb 64 args[1] = (uint32_t)buffer;
rahul_dahiya 0:fb8047b156bb 65 args[2] = (uint32_t)length;
rahul_dahiya 0:fb8047b156bb 66 return __semihost(SYS_WRITE, args);
rahul_dahiya 0:fb8047b156bb 67 }
rahul_dahiya 0:fb8047b156bb 68
rahul_dahiya 0:fb8047b156bb 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
rahul_dahiya 0:fb8047b156bb 70 uint32_t args[3];
rahul_dahiya 0:fb8047b156bb 71 args[0] = (uint32_t)fh;
rahul_dahiya 0:fb8047b156bb 72 args[1] = (uint32_t)buffer;
rahul_dahiya 0:fb8047b156bb 73 args[2] = (uint32_t)length;
rahul_dahiya 0:fb8047b156bb 74 return __semihost(SYS_READ, args);
rahul_dahiya 0:fb8047b156bb 75 }
rahul_dahiya 0:fb8047b156bb 76
rahul_dahiya 0:fb8047b156bb 77 int semihost_istty(FILEHANDLE fh) {
rahul_dahiya 0:fb8047b156bb 78 return __semihost(SYS_ISTTY, &fh);
rahul_dahiya 0:fb8047b156bb 79 }
rahul_dahiya 0:fb8047b156bb 80
rahul_dahiya 0:fb8047b156bb 81 int semihost_seek(FILEHANDLE fh, long position) {
rahul_dahiya 0:fb8047b156bb 82 uint32_t args[2];
rahul_dahiya 0:fb8047b156bb 83 args[0] = (uint32_t)fh;
rahul_dahiya 0:fb8047b156bb 84 args[1] = (uint32_t)position;
rahul_dahiya 0:fb8047b156bb 85 return __semihost(SYS_SEEK, args);
rahul_dahiya 0:fb8047b156bb 86 }
rahul_dahiya 0:fb8047b156bb 87
rahul_dahiya 0:fb8047b156bb 88 int semihost_ensure(FILEHANDLE fh) {
rahul_dahiya 0:fb8047b156bb 89 return __semihost(SYS_ENSURE, &fh);
rahul_dahiya 0:fb8047b156bb 90 }
rahul_dahiya 0:fb8047b156bb 91
rahul_dahiya 0:fb8047b156bb 92 long semihost_flen(FILEHANDLE fh) {
rahul_dahiya 0:fb8047b156bb 93 return __semihost(SYS_FLEN, &fh);
rahul_dahiya 0:fb8047b156bb 94 }
rahul_dahiya 0:fb8047b156bb 95
rahul_dahiya 0:fb8047b156bb 96 int semihost_remove(const char *name) {
rahul_dahiya 0:fb8047b156bb 97 uint32_t args[2];
rahul_dahiya 0:fb8047b156bb 98 args[0] = (uint32_t)name;
rahul_dahiya 0:fb8047b156bb 99 args[1] = (uint32_t)strlen(name);
rahul_dahiya 0:fb8047b156bb 100 return __semihost(SYS_REMOVE, args);
rahul_dahiya 0:fb8047b156bb 101 }
rahul_dahiya 0:fb8047b156bb 102
rahul_dahiya 0:fb8047b156bb 103 int semihost_rename(const char *old_name, const char *new_name) {
rahul_dahiya 0:fb8047b156bb 104 uint32_t args[4];
rahul_dahiya 0:fb8047b156bb 105 args[0] = (uint32_t)old_name;
rahul_dahiya 0:fb8047b156bb 106 args[1] = (uint32_t)strlen(old_name);
rahul_dahiya 0:fb8047b156bb 107 args[0] = (uint32_t)new_name;
rahul_dahiya 0:fb8047b156bb 108 args[1] = (uint32_t)strlen(new_name);
rahul_dahiya 0:fb8047b156bb 109 return __semihost(SYS_RENAME, args);
rahul_dahiya 0:fb8047b156bb 110 }
rahul_dahiya 0:fb8047b156bb 111 #endif
rahul_dahiya 0:fb8047b156bb 112
rahul_dahiya 0:fb8047b156bb 113 int semihost_exit(void) {
rahul_dahiya 0:fb8047b156bb 114 uint32_t args[4];
rahul_dahiya 0:fb8047b156bb 115 return __semihost(SYS_EXIT, args);
rahul_dahiya 0:fb8047b156bb 116 }
rahul_dahiya 0:fb8047b156bb 117
rahul_dahiya 0:fb8047b156bb 118 int semihost_uid(char *uid) {
rahul_dahiya 0:fb8047b156bb 119 uint32_t args[2];
rahul_dahiya 0:fb8047b156bb 120 args[0] = (uint32_t)uid;
rahul_dahiya 0:fb8047b156bb 121 args[1] = DEVICE_ID_LENGTH + 1;
rahul_dahiya 0:fb8047b156bb 122 return __semihost(USR_UID, &args);
rahul_dahiya 0:fb8047b156bb 123 }
rahul_dahiya 0:fb8047b156bb 124
rahul_dahiya 0:fb8047b156bb 125 int semihost_reset(void) {
rahul_dahiya 0:fb8047b156bb 126 // Does not normally return, however if used with older firmware versions
rahul_dahiya 0:fb8047b156bb 127 // that do not support this call it will return -1.
rahul_dahiya 0:fb8047b156bb 128 return __semihost(USR_RESET, NULL);
rahul_dahiya 0:fb8047b156bb 129 }
rahul_dahiya 0:fb8047b156bb 130
rahul_dahiya 0:fb8047b156bb 131 int semihost_vbus(void) {
rahul_dahiya 0:fb8047b156bb 132 return __semihost(USR_VBUS, NULL);
rahul_dahiya 0:fb8047b156bb 133 }
rahul_dahiya 0:fb8047b156bb 134
rahul_dahiya 0:fb8047b156bb 135 int semihost_powerdown(void) {
rahul_dahiya 0:fb8047b156bb 136 return __semihost(USR_POWERDOWN, NULL);
rahul_dahiya 0:fb8047b156bb 137 }
rahul_dahiya 0:fb8047b156bb 138
rahul_dahiya 0:fb8047b156bb 139 #if DEVICE_DEBUG_AWARENESS
rahul_dahiya 0:fb8047b156bb 140
rahul_dahiya 0:fb8047b156bb 141 int semihost_connected(void) {
rahul_dahiya 0:fb8047b156bb 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
rahul_dahiya 0:fb8047b156bb 143 }
rahul_dahiya 0:fb8047b156bb 144
rahul_dahiya 0:fb8047b156bb 145 #else
rahul_dahiya 0:fb8047b156bb 146 // These processors cannot know if the interface is connect, assume so:
rahul_dahiya 0:fb8047b156bb 147 static int is_debugger_attached = 1;
rahul_dahiya 0:fb8047b156bb 148
rahul_dahiya 0:fb8047b156bb 149 int semihost_connected(void) {
rahul_dahiya 0:fb8047b156bb 150 return is_debugger_attached;
rahul_dahiya 0:fb8047b156bb 151 }
rahul_dahiya 0:fb8047b156bb 152 #endif
rahul_dahiya 0:fb8047b156bb 153
rahul_dahiya 0:fb8047b156bb 154 int semihost_disabledebug(void) {
rahul_dahiya 0:fb8047b156bb 155 uint32_t args[1];
rahul_dahiya 0:fb8047b156bb 156 #if !(DEVICE_DEBUG_AWARENESS)
rahul_dahiya 0:fb8047b156bb 157 is_debugger_attached = 0;
rahul_dahiya 0:fb8047b156bb 158 #endif
rahul_dahiya 0:fb8047b156bb 159 return __semihost(USR_DISABLEDEBUG, &args);
rahul_dahiya 0:fb8047b156bb 160 }
rahul_dahiya 0:fb8047b156bb 161
rahul_dahiya 0:fb8047b156bb 162 #endif
rahul_dahiya 0:fb8047b156bb 163