Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

platform/mbed_semihost_api.c@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 * Copyright (c) 2006-2013 ARM Limited
saloutos 0:083111ae2a11 3 *
saloutos 0:083111ae2a11 4 * Licensed under the Apache License, Version 2.0 (the "License");
saloutos 0:083111ae2a11 5 * you may not use this file except in compliance with the License.
saloutos 0:083111ae2a11 6 * You may obtain a copy of the License at
saloutos 0:083111ae2a11 7 *
saloutos 0:083111ae2a11 8 * http://www.apache.org/licenses/LICENSE-2.0
saloutos 0:083111ae2a11 9 *
saloutos 0:083111ae2a11 10 * Unless required by applicable law or agreed to in writing, software
saloutos 0:083111ae2a11 11 * distributed under the License is distributed on an "AS IS" BASIS,
saloutos 0:083111ae2a11 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
saloutos 0:083111ae2a11 13 * See the License for the specific language governing permissions and
saloutos 0:083111ae2a11 14 * limitations under the License.
saloutos 0:083111ae2a11 15 */
saloutos 0:083111ae2a11 16 #include "cmsis.h"
saloutos 0:083111ae2a11 17 #include "platform/mbed_semihost_api.h"
saloutos 0:083111ae2a11 18
saloutos 0:083111ae2a11 19 #include <stdint.h>
saloutos 0:083111ae2a11 20 #include <string.h>
saloutos 0:083111ae2a11 21
saloutos 0:083111ae2a11 22 #if DEVICE_SEMIHOST
saloutos 0:083111ae2a11 23
saloutos 0:083111ae2a11 24 // ARM Semihosting Commands
saloutos 0:083111ae2a11 25 #define SYS_OPEN (0x1)
saloutos 0:083111ae2a11 26 #define SYS_CLOSE (0x2)
saloutos 0:083111ae2a11 27 #define SYS_WRITE (0x5)
saloutos 0:083111ae2a11 28 #define SYS_READ (0x6)
saloutos 0:083111ae2a11 29 #define SYS_ISTTY (0x9)
saloutos 0:083111ae2a11 30 #define SYS_SEEK (0xa)
saloutos 0:083111ae2a11 31 #define SYS_ENSURE (0xb)
saloutos 0:083111ae2a11 32 #define SYS_FLEN (0xc)
saloutos 0:083111ae2a11 33 #define SYS_REMOVE (0xe)
saloutos 0:083111ae2a11 34 #define SYS_RENAME (0xf)
saloutos 0:083111ae2a11 35 #define SYS_EXIT (0x18)
saloutos 0:083111ae2a11 36
saloutos 0:083111ae2a11 37 // mbed Semihosting Commands
saloutos 0:083111ae2a11 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
saloutos 0:083111ae2a11 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
saloutos 0:083111ae2a11 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
saloutos 0:083111ae2a11 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
saloutos 0:083111ae2a11 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
saloutos 0:083111ae2a11 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
saloutos 0:083111ae2a11 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
saloutos 0:083111ae2a11 45
saloutos 0:083111ae2a11 46 #if DEVICE_LOCALFILESYSTEM
saloutos 0:083111ae2a11 47 FILEHANDLE semihost_open(const char* name, int openmode) {
saloutos 0:083111ae2a11 48 uint32_t args[3];
saloutos 0:083111ae2a11 49 args[0] = (uint32_t)name;
saloutos 0:083111ae2a11 50 args[1] = (uint32_t)openmode;
saloutos 0:083111ae2a11 51 args[2] = (uint32_t)strlen(name);
saloutos 0:083111ae2a11 52 return __semihost(SYS_OPEN, args);
saloutos 0:083111ae2a11 53 }
saloutos 0:083111ae2a11 54
saloutos 0:083111ae2a11 55 int semihost_close(FILEHANDLE fh) {
saloutos 0:083111ae2a11 56 return __semihost(SYS_CLOSE, &fh);
saloutos 0:083111ae2a11 57 }
saloutos 0:083111ae2a11 58
saloutos 0:083111ae2a11 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
saloutos 0:083111ae2a11 60 if (length == 0) return 0;
saloutos 0:083111ae2a11 61
saloutos 0:083111ae2a11 62 uint32_t args[3];
saloutos 0:083111ae2a11 63 args[0] = (uint32_t)fh;
saloutos 0:083111ae2a11 64 args[1] = (uint32_t)buffer;
saloutos 0:083111ae2a11 65 args[2] = (uint32_t)length;
saloutos 0:083111ae2a11 66 return __semihost(SYS_WRITE, args);
saloutos 0:083111ae2a11 67 }
saloutos 0:083111ae2a11 68
saloutos 0:083111ae2a11 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
saloutos 0:083111ae2a11 70 uint32_t args[3];
saloutos 0:083111ae2a11 71 args[0] = (uint32_t)fh;
saloutos 0:083111ae2a11 72 args[1] = (uint32_t)buffer;
saloutos 0:083111ae2a11 73 args[2] = (uint32_t)length;
saloutos 0:083111ae2a11 74 return __semihost(SYS_READ, args);
saloutos 0:083111ae2a11 75 }
saloutos 0:083111ae2a11 76
saloutos 0:083111ae2a11 77 int semihost_istty(FILEHANDLE fh) {
saloutos 0:083111ae2a11 78 return __semihost(SYS_ISTTY, &fh);
saloutos 0:083111ae2a11 79 }
saloutos 0:083111ae2a11 80
saloutos 0:083111ae2a11 81 int semihost_seek(FILEHANDLE fh, long position) {
saloutos 0:083111ae2a11 82 uint32_t args[2];
saloutos 0:083111ae2a11 83 args[0] = (uint32_t)fh;
saloutos 0:083111ae2a11 84 args[1] = (uint32_t)position;
saloutos 0:083111ae2a11 85 return __semihost(SYS_SEEK, args);
saloutos 0:083111ae2a11 86 }
saloutos 0:083111ae2a11 87
saloutos 0:083111ae2a11 88 int semihost_ensure(FILEHANDLE fh) {
saloutos 0:083111ae2a11 89 return __semihost(SYS_ENSURE, &fh);
saloutos 0:083111ae2a11 90 }
saloutos 0:083111ae2a11 91
saloutos 0:083111ae2a11 92 long semihost_flen(FILEHANDLE fh) {
saloutos 0:083111ae2a11 93 return __semihost(SYS_FLEN, &fh);
saloutos 0:083111ae2a11 94 }
saloutos 0:083111ae2a11 95
saloutos 0:083111ae2a11 96 int semihost_remove(const char *name) {
saloutos 0:083111ae2a11 97 uint32_t args[2];
saloutos 0:083111ae2a11 98 args[0] = (uint32_t)name;
saloutos 0:083111ae2a11 99 args[1] = (uint32_t)strlen(name);
saloutos 0:083111ae2a11 100 return __semihost(SYS_REMOVE, args);
saloutos 0:083111ae2a11 101 }
saloutos 0:083111ae2a11 102
saloutos 0:083111ae2a11 103 int semihost_rename(const char *old_name, const char *new_name) {
saloutos 0:083111ae2a11 104 uint32_t args[4];
saloutos 0:083111ae2a11 105 args[0] = (uint32_t)old_name;
saloutos 0:083111ae2a11 106 args[1] = (uint32_t)strlen(old_name);
saloutos 0:083111ae2a11 107 args[0] = (uint32_t)new_name;
saloutos 0:083111ae2a11 108 args[1] = (uint32_t)strlen(new_name);
saloutos 0:083111ae2a11 109 return __semihost(SYS_RENAME, args);
saloutos 0:083111ae2a11 110 }
saloutos 0:083111ae2a11 111 #endif
saloutos 0:083111ae2a11 112
saloutos 0:083111ae2a11 113 int semihost_exit(void) {
saloutos 0:083111ae2a11 114 uint32_t args[4];
saloutos 0:083111ae2a11 115 return __semihost(SYS_EXIT, args);
saloutos 0:083111ae2a11 116 }
saloutos 0:083111ae2a11 117
saloutos 0:083111ae2a11 118 int semihost_uid(char *uid) {
saloutos 0:083111ae2a11 119 uint32_t args[2];
saloutos 0:083111ae2a11 120 args[0] = (uint32_t)uid;
saloutos 0:083111ae2a11 121 args[1] = DEVICE_ID_LENGTH + 1;
saloutos 0:083111ae2a11 122 return __semihost(USR_UID, &args);
saloutos 0:083111ae2a11 123 }
saloutos 0:083111ae2a11 124
saloutos 0:083111ae2a11 125 int semihost_reset(void) {
saloutos 0:083111ae2a11 126 // Does not normally return, however if used with older firmware versions
saloutos 0:083111ae2a11 127 // that do not support this call it will return -1.
saloutos 0:083111ae2a11 128 return __semihost(USR_RESET, NULL);
saloutos 0:083111ae2a11 129 }
saloutos 0:083111ae2a11 130
saloutos 0:083111ae2a11 131 int semihost_vbus(void) {
saloutos 0:083111ae2a11 132 return __semihost(USR_VBUS, NULL);
saloutos 0:083111ae2a11 133 }
saloutos 0:083111ae2a11 134
saloutos 0:083111ae2a11 135 int semihost_powerdown(void) {
saloutos 0:083111ae2a11 136 return __semihost(USR_POWERDOWN, NULL);
saloutos 0:083111ae2a11 137 }
saloutos 0:083111ae2a11 138
saloutos 0:083111ae2a11 139 #if DEVICE_DEBUG_AWARENESS
saloutos 0:083111ae2a11 140
saloutos 0:083111ae2a11 141 int semihost_connected(void) {
saloutos 0:083111ae2a11 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
saloutos 0:083111ae2a11 143 }
saloutos 0:083111ae2a11 144
saloutos 0:083111ae2a11 145 #else
saloutos 0:083111ae2a11 146 // These processors cannot know if the interface is connect, assume so:
saloutos 0:083111ae2a11 147 static int is_debugger_attached = 1;
saloutos 0:083111ae2a11 148
saloutos 0:083111ae2a11 149 int semihost_connected(void) {
saloutos 0:083111ae2a11 150 return is_debugger_attached;
saloutos 0:083111ae2a11 151 }
saloutos 0:083111ae2a11 152 #endif
saloutos 0:083111ae2a11 153
saloutos 0:083111ae2a11 154 int semihost_disabledebug(void) {
saloutos 0:083111ae2a11 155 uint32_t args[1];
saloutos 0:083111ae2a11 156 #if !(DEVICE_DEBUG_AWARENESS)
saloutos 0:083111ae2a11 157 is_debugger_attached = 0;
saloutos 0:083111ae2a11 158 #endif
saloutos 0:083111ae2a11 159 return __semihost(USR_DISABLEDEBUG, &args);
saloutos 0:083111ae2a11 160 }
saloutos 0:083111ae2a11 161
saloutos 0:083111ae2a11 162 #endif
saloutos 0:083111ae2a11 163