Василий Басалаев / mbed-I2CIO

Modification of mbed-src library only for STM32F030F4, very cheap microcontroller in 20-Pin TSSOP package, with 16Kbytes of Flash and 4Kbytes of Ram. **Target for online compilator must be Nucleo 32F030R8.** 01.02.2018 Acosinwork: Fork of mbed-STM32F030F4 library. Support for Troyka GPIO expander by Amperka. http://amperka.ru/product/troyka-gpio-expander

Fork of mbed-STM32F030F4 by Nothing Special

common/semihost_api.c@12:6f07dd7cbe47, 2018-02-01 (annotated)

Committer:
acosinwork
Date:
Thu Feb 01 10:37:10 2018 +0000
Revision:
12:6f07dd7cbe47
Parent:
0:38ccae254a29 
Change pin mapping and set internall oscillator as default. Fork to support Troyka GPIO expander (I2C I/O); http://amperka.ru/product/troyka-gpio-expander

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:38ccae254a29 1 /* mbed Microcontroller Library
mega64 0:38ccae254a29 2 * Copyright (c) 2006-2013 ARM Limited
mega64 0:38ccae254a29 3 *
mega64 0:38ccae254a29 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 0:38ccae254a29 5 * you may not use this file except in compliance with the License.
mega64 0:38ccae254a29 6 * You may obtain a copy of the License at
mega64 0:38ccae254a29 7 *
mega64 0:38ccae254a29 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 0:38ccae254a29 9 *
mega64 0:38ccae254a29 10 * Unless required by applicable law or agreed to in writing, software
mega64 0:38ccae254a29 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 0:38ccae254a29 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 0:38ccae254a29 13 * See the License for the specific language governing permissions and
mega64 0:38ccae254a29 14 * limitations under the License.
mega64 0:38ccae254a29 15 */
mega64 0:38ccae254a29 16 #include "cmsis.h"
mega64 0:38ccae254a29 17 #include "semihost_api.h"
mega64 0:38ccae254a29 18
mega64 0:38ccae254a29 19 #include <stdint.h>
mega64 0:38ccae254a29 20 #include <string.h>
mega64 0:38ccae254a29 21
mega64 0:38ccae254a29 22 #if DEVICE_SEMIHOST
mega64 0:38ccae254a29 23
mega64 0:38ccae254a29 24 // ARM Semihosting Commands
mega64 0:38ccae254a29 25 #define SYS_OPEN (0x1)
mega64 0:38ccae254a29 26 #define SYS_CLOSE (0x2)
mega64 0:38ccae254a29 27 #define SYS_WRITE (0x5)
mega64 0:38ccae254a29 28 #define SYS_READ (0x6)
mega64 0:38ccae254a29 29 #define SYS_ISTTY (0x9)
mega64 0:38ccae254a29 30 #define SYS_SEEK (0xa)
mega64 0:38ccae254a29 31 #define SYS_ENSURE (0xb)
mega64 0:38ccae254a29 32 #define SYS_FLEN (0xc)
mega64 0:38ccae254a29 33 #define SYS_REMOVE (0xe)
mega64 0:38ccae254a29 34 #define SYS_RENAME (0xf)
mega64 0:38ccae254a29 35 #define SYS_EXIT (0x18)
mega64 0:38ccae254a29 36
mega64 0:38ccae254a29 37 // mbed Semihosting Commands
mega64 0:38ccae254a29 38 #define RESERVED_FOR_USER_APPLICATIONS (0x100) // 0x100 - 0x1ff
mega64 0:38ccae254a29 39 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
mega64 0:38ccae254a29 40 #define USR_UID (RESERVED_FOR_USER_APPLICATIONS + 1)
mega64 0:38ccae254a29 41 #define USR_RESET (RESERVED_FOR_USER_APPLICATIONS + 2)
mega64 0:38ccae254a29 42 #define USR_VBUS (RESERVED_FOR_USER_APPLICATIONS + 3)
mega64 0:38ccae254a29 43 #define USR_POWERDOWN (RESERVED_FOR_USER_APPLICATIONS + 4)
mega64 0:38ccae254a29 44 #define USR_DISABLEDEBUG (RESERVED_FOR_USER_APPLICATIONS + 5)
mega64 0:38ccae254a29 45
mega64 0:38ccae254a29 46 #if DEVICE_LOCALFILESYSTEM
mega64 0:38ccae254a29 47 FILEHANDLE semihost_open(const char* name, int openmode) {
mega64 0:38ccae254a29 48 uint32_t args[3];
mega64 0:38ccae254a29 49 args[0] = (uint32_t)name;
mega64 0:38ccae254a29 50 args[1] = (uint32_t)openmode;
mega64 0:38ccae254a29 51 args[2] = (uint32_t)strlen(name);
mega64 0:38ccae254a29 52 return __semihost(SYS_OPEN, args);
mega64 0:38ccae254a29 53 }
mega64 0:38ccae254a29 54
mega64 0:38ccae254a29 55 int semihost_close(FILEHANDLE fh) {
mega64 0:38ccae254a29 56 return __semihost(SYS_CLOSE, &fh);
mega64 0:38ccae254a29 57 }
mega64 0:38ccae254a29 58
mega64 0:38ccae254a29 59 int semihost_write(FILEHANDLE fh, const unsigned char* buffer, unsigned int length, int mode) {
mega64 0:38ccae254a29 60 if (length == 0) return 0;
mega64 0:38ccae254a29 61
mega64 0:38ccae254a29 62 uint32_t args[3];
mega64 0:38ccae254a29 63 args[0] = (uint32_t)fh;
mega64 0:38ccae254a29 64 args[1] = (uint32_t)buffer;
mega64 0:38ccae254a29 65 args[2] = (uint32_t)length;
mega64 0:38ccae254a29 66 return __semihost(SYS_WRITE, args);
mega64 0:38ccae254a29 67 }
mega64 0:38ccae254a29 68
mega64 0:38ccae254a29 69 int semihost_read(FILEHANDLE fh, unsigned char* buffer, unsigned int length, int mode) {
mega64 0:38ccae254a29 70 uint32_t args[3];
mega64 0:38ccae254a29 71 args[0] = (uint32_t)fh;
mega64 0:38ccae254a29 72 args[1] = (uint32_t)buffer;
mega64 0:38ccae254a29 73 args[2] = (uint32_t)length;
mega64 0:38ccae254a29 74 return __semihost(SYS_READ, args);
mega64 0:38ccae254a29 75 }
mega64 0:38ccae254a29 76
mega64 0:38ccae254a29 77 int semihost_istty(FILEHANDLE fh) {
mega64 0:38ccae254a29 78 return __semihost(SYS_ISTTY, &fh);
mega64 0:38ccae254a29 79 }
mega64 0:38ccae254a29 80
mega64 0:38ccae254a29 81 int semihost_seek(FILEHANDLE fh, long position) {
mega64 0:38ccae254a29 82 uint32_t args[2];
mega64 0:38ccae254a29 83 args[0] = (uint32_t)fh;
mega64 0:38ccae254a29 84 args[1] = (uint32_t)position;
mega64 0:38ccae254a29 85 return __semihost(SYS_SEEK, args);
mega64 0:38ccae254a29 86 }
mega64 0:38ccae254a29 87
mega64 0:38ccae254a29 88 int semihost_ensure(FILEHANDLE fh) {
mega64 0:38ccae254a29 89 return __semihost(SYS_ENSURE, &fh);
mega64 0:38ccae254a29 90 }
mega64 0:38ccae254a29 91
mega64 0:38ccae254a29 92 long semihost_flen(FILEHANDLE fh) {
mega64 0:38ccae254a29 93 return __semihost(SYS_FLEN, &fh);
mega64 0:38ccae254a29 94 }
mega64 0:38ccae254a29 95
mega64 0:38ccae254a29 96 int semihost_remove(const char *name) {
mega64 0:38ccae254a29 97 uint32_t args[2];
mega64 0:38ccae254a29 98 args[0] = (uint32_t)name;
mega64 0:38ccae254a29 99 args[1] = (uint32_t)strlen(name);
mega64 0:38ccae254a29 100 return __semihost(SYS_REMOVE, args);
mega64 0:38ccae254a29 101 }
mega64 0:38ccae254a29 102
mega64 0:38ccae254a29 103 int semihost_rename(const char *old_name, const char *new_name) {
mega64 0:38ccae254a29 104 uint32_t args[4];
mega64 0:38ccae254a29 105 args[0] = (uint32_t)old_name;
mega64 0:38ccae254a29 106 args[1] = (uint32_t)strlen(old_name);
mega64 0:38ccae254a29 107 args[0] = (uint32_t)new_name;
mega64 0:38ccae254a29 108 args[1] = (uint32_t)strlen(new_name);
mega64 0:38ccae254a29 109 return __semihost(SYS_RENAME, args);
mega64 0:38ccae254a29 110 }
mega64 0:38ccae254a29 111 #endif
mega64 0:38ccae254a29 112
mega64 0:38ccae254a29 113 int semihost_exit(void) {
mega64 0:38ccae254a29 114 uint32_t args[4];
mega64 0:38ccae254a29 115 return __semihost(SYS_EXIT, args);
mega64 0:38ccae254a29 116 }
mega64 0:38ccae254a29 117
mega64 0:38ccae254a29 118 int semihost_uid(char *uid) {
mega64 0:38ccae254a29 119 uint32_t args[2];
mega64 0:38ccae254a29 120 args[0] = (uint32_t)uid;
mega64 0:38ccae254a29 121 args[1] = DEVICE_ID_LENGTH + 1;
mega64 0:38ccae254a29 122 return __semihost(USR_UID, &args);
mega64 0:38ccae254a29 123 }
mega64 0:38ccae254a29 124
mega64 0:38ccae254a29 125 int semihost_reset(void) {
mega64 0:38ccae254a29 126 // Does not normally return, however if used with older firmware versions
mega64 0:38ccae254a29 127 // that do not support this call it will return -1.
mega64 0:38ccae254a29 128 return __semihost(USR_RESET, NULL);
mega64 0:38ccae254a29 129 }
mega64 0:38ccae254a29 130
mega64 0:38ccae254a29 131 int semihost_vbus(void) {
mega64 0:38ccae254a29 132 return __semihost(USR_VBUS, NULL);
mega64 0:38ccae254a29 133 }
mega64 0:38ccae254a29 134
mega64 0:38ccae254a29 135 int semihost_powerdown(void) {
mega64 0:38ccae254a29 136 return __semihost(USR_POWERDOWN, NULL);
mega64 0:38ccae254a29 137 }
mega64 0:38ccae254a29 138
mega64 0:38ccae254a29 139 #if DEVICE_DEBUG_AWARENESS
mega64 0:38ccae254a29 140
mega64 0:38ccae254a29 141 int semihost_connected(void) {
mega64 0:38ccae254a29 142 return (CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk) ? 1 : 0;
mega64 0:38ccae254a29 143 }
mega64 0:38ccae254a29 144
mega64 0:38ccae254a29 145 #else
mega64 0:38ccae254a29 146 // These processors cannot know if the interface is connect, assume so:
mega64 0:38ccae254a29 147 static int is_debugger_attached = 1;
mega64 0:38ccae254a29 148
mega64 0:38ccae254a29 149 int semihost_connected(void) {
mega64 0:38ccae254a29 150 return is_debugger_attached;
mega64 0:38ccae254a29 151 }
mega64 0:38ccae254a29 152 #endif
mega64 0:38ccae254a29 153
mega64 0:38ccae254a29 154 int semihost_disabledebug(void) {
mega64 0:38ccae254a29 155 #if !(DEVICE_DEBUG_AWARENESS)
mega64 0:38ccae254a29 156 is_debugger_attached = 0;
mega64 0:38ccae254a29 157 #endif
mega64 0:38ccae254a29 158 return __semihost(USR_DISABLEDEBUG, NULL);
mega64 0:38ccae254a29 159 }
mega64 0:38ccae254a29 160
mega64 0:38ccae254a29 161 #endif
mega64 0:38ccae254a29 162