John Mitchell / DMSupport

Subdirectory provided by Embedded Artists

Dependencies:   DM_FATFileSystem DM_HttpServer DM_USBHost EthernetInterface USBDevice mbed-rpc mbed-rtos mbed-src

Dependents:   lpc4088_displaymodule_hello_world_Sept_2018

Fork of DMSupport by Embedded Artists

FileSystems/ff_rtos_helpers.cpp@41:ac490f69398f, 2018-10-04 (annotated)

Committer:
jmitc91516
Date:
Thu Oct 04 08:30:19 2018 +0000
Revision:
41:ac490f69398f
Parent:
2:887c6b45e7fa 
To demonstrate a problem with the dm_board_config.h file - the project will not build if it is in its normal place in the root directory, but builds OK if I copy it to the DMSupport subdirectory.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 2:887c6b45e7fa 1 /*
embeddedartists 2:887c6b45e7fa 2 * Copyright 2014 Embedded Artists AB
embeddedartists 2:887c6b45e7fa 3 *
embeddedartists 2:887c6b45e7fa 4 * Licensed under the Apache License, Version 2.0 (the "License");
embeddedartists 2:887c6b45e7fa 5 * you may not use this file except in compliance with the License.
embeddedartists 2:887c6b45e7fa 6 * You may obtain a copy of the License at
embeddedartists 2:887c6b45e7fa 7 *
embeddedartists 2:887c6b45e7fa 8 * http://www.apache.org/licenses/LICENSE-2.0
embeddedartists 2:887c6b45e7fa 9 *
embeddedartists 2:887c6b45e7fa 10 * Unless required by applicable law or agreed to in writing, software
embeddedartists 2:887c6b45e7fa 11 * distributed under the License is distributed on an "AS IS" BASIS,
embeddedartists 2:887c6b45e7fa 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
embeddedartists 2:887c6b45e7fa 13 * See the License for the specific language governing permissions and
embeddedartists 2:887c6b45e7fa 14 * limitations under the License.
embeddedartists 2:887c6b45e7fa 15 */
embeddedartists 2:887c6b45e7fa 16
embeddedartists 2:887c6b45e7fa 17 /******************************************************************************
embeddedartists 2:887c6b45e7fa 18 * Includes
embeddedartists 2:887c6b45e7fa 19 *****************************************************************************/
embeddedartists 2:887c6b45e7fa 20
embeddedartists 2:887c6b45e7fa 21 #include "ff.h"
embeddedartists 2:887c6b45e7fa 22 #include "mbed.h"
embeddedartists 2:887c6b45e7fa 23 #include "rtos.h"
embeddedartists 2:887c6b45e7fa 24
embeddedartists 2:887c6b45e7fa 25 /******************************************************************************
embeddedartists 2:887c6b45e7fa 26 * Defines and typedefs
embeddedartists 2:887c6b45e7fa 27 *****************************************************************************/
embeddedartists 2:887c6b45e7fa 28
embeddedartists 2:887c6b45e7fa 29 /******************************************************************************
embeddedartists 2:887c6b45e7fa 30 * External global variables
embeddedartists 2:887c6b45e7fa 31 *****************************************************************************/
embeddedartists 2:887c6b45e7fa 32
embeddedartists 2:887c6b45e7fa 33 /******************************************************************************
embeddedartists 2:887c6b45e7fa 34 * Local variables
embeddedartists 2:887c6b45e7fa 35 *****************************************************************************/
embeddedartists 2:887c6b45e7fa 36
embeddedartists 2:887c6b45e7fa 37 /******************************************************************************
embeddedartists 2:887c6b45e7fa 38 * Global Functions
embeddedartists 2:887c6b45e7fa 39 *****************************************************************************/
embeddedartists 2:887c6b45e7fa 40
embeddedartists 2:887c6b45e7fa 41 #if _FS_REENTRANT
embeddedartists 2:887c6b45e7fa 42 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 43 /* Create a Synchronization Object */
embeddedartists 2:887c6b45e7fa 44 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 45 /* This function is called in f_mount function to create a new
embeddedartists 2:887c6b45e7fa 46 / synchronization object, such as semaphore and mutex. When a zero is
embeddedartists 2:887c6b45e7fa 47 / returned, the f_mount function fails with FR_INT_ERR.
embeddedartists 2:887c6b45e7fa 48 */
embeddedartists 2:887c6b45e7fa 49
embeddedartists 2:887c6b45e7fa 50 int ff_cre_syncobj ( /* TRUE:Function succeeded, FALSE:Could not create due to any error */
embeddedartists 2:887c6b45e7fa 51 BYTE vol, /* Corresponding logical drive being processed */
embeddedartists 2:887c6b45e7fa 52 _SYNC_t *sobj /* Pointer to return the created sync object */
embeddedartists 2:887c6b45e7fa 53 )
embeddedartists 2:887c6b45e7fa 54 {
embeddedartists 2:887c6b45e7fa 55 int ret;
embeddedartists 2:887c6b45e7fa 56
embeddedartists 2:887c6b45e7fa 57 // *sobj = CreateMutex(NULL, FALSE, NULL); /* Win32 */
embeddedartists 2:887c6b45e7fa 58 // ret = (*sobj != INVALID_HANDLE_VALUE);
embeddedartists 2:887c6b45e7fa 59
embeddedartists 2:887c6b45e7fa 60 // *sobj = SyncObjects[vol]; /* uITRON (give a static sync object) */
embeddedartists 2:887c6b45e7fa 61 // ret = 1; /* The initial value of the semaphore must be 1. */
embeddedartists 2:887c6b45e7fa 62
embeddedartists 2:887c6b45e7fa 63 // *sobj = OSMutexCreate(0, &err); /* uC/OS-II */
embeddedartists 2:887c6b45e7fa 64 // ret = (err == OS_NO_ERR);
embeddedartists 2:887c6b45e7fa 65
embeddedartists 2:887c6b45e7fa 66 // *sobj = xSemaphoreCreateMutex(); /* FreeRTOS */
embeddedartists 2:887c6b45e7fa 67 // ret = (*sobj != NULL);
embeddedartists 2:887c6b45e7fa 68
embeddedartists 2:887c6b45e7fa 69 *sobj = new Mutex(); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 70 // *sobj = new Semaphore(1); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 71 ret = (*sobj != NULL);
embeddedartists 2:887c6b45e7fa 72
embeddedartists 2:887c6b45e7fa 73 return ret;
embeddedartists 2:887c6b45e7fa 74 }
embeddedartists 2:887c6b45e7fa 75
embeddedartists 2:887c6b45e7fa 76
embeddedartists 2:887c6b45e7fa 77
embeddedartists 2:887c6b45e7fa 78 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 79 /* Delete a Synchronization Object */
embeddedartists 2:887c6b45e7fa 80 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 81 /* This function is called in f_mount function to delete a synchronization
embeddedartists 2:887c6b45e7fa 82 / object that created with ff_cre_syncobj function. When a zero is
embeddedartists 2:887c6b45e7fa 83 / returned, the f_mount function fails with FR_INT_ERR.
embeddedartists 2:887c6b45e7fa 84 */
embeddedartists 2:887c6b45e7fa 85
embeddedartists 2:887c6b45e7fa 86 int ff_del_syncobj ( /* TRUE:Function succeeded, FALSE:Could not delete due to any error */
embeddedartists 2:887c6b45e7fa 87 _SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
embeddedartists 2:887c6b45e7fa 88 )
embeddedartists 2:887c6b45e7fa 89 {
embeddedartists 2:887c6b45e7fa 90 BOOL ret;
embeddedartists 2:887c6b45e7fa 91
embeddedartists 2:887c6b45e7fa 92 // ret = CloseHandle(sobj); /* Win32 */
embeddedartists 2:887c6b45e7fa 93
embeddedartists 2:887c6b45e7fa 94 // ret = 1; /* uITRON (nothing to do) */
embeddedartists 2:887c6b45e7fa 95
embeddedartists 2:887c6b45e7fa 96 // OSMutexDel(sobj, OS_DEL_ALWAYS, &err); /* uC/OS-II */
embeddedartists 2:887c6b45e7fa 97 // ret = (err == OS_NO_ERR);
embeddedartists 2:887c6b45e7fa 98
embeddedartists 2:887c6b45e7fa 99 // ret = 1; /* FreeRTOS (nothing to do) */
embeddedartists 2:887c6b45e7fa 100
embeddedartists 2:887c6b45e7fa 101 if (sobj != NULL) { /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 102 free(sobj);
embeddedartists 2:887c6b45e7fa 103 }
embeddedartists 2:887c6b45e7fa 104 ret = 1;
embeddedartists 2:887c6b45e7fa 105
embeddedartists 2:887c6b45e7fa 106 return ret;
embeddedartists 2:887c6b45e7fa 107 }
embeddedartists 2:887c6b45e7fa 108
embeddedartists 2:887c6b45e7fa 109
embeddedartists 2:887c6b45e7fa 110
embeddedartists 2:887c6b45e7fa 111 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 112 /* Request Grant to Access the Volume */
embeddedartists 2:887c6b45e7fa 113 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 114 /* This function is called on entering file functions to lock the volume.
embeddedartists 2:887c6b45e7fa 115 / When a zero is returned, the file function fails with FR_TIMEOUT.
embeddedartists 2:887c6b45e7fa 116 */
embeddedartists 2:887c6b45e7fa 117
embeddedartists 2:887c6b45e7fa 118 int ff_req_grant ( /* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
embeddedartists 2:887c6b45e7fa 119 _SYNC_t sobj /* Sync object to wait */
embeddedartists 2:887c6b45e7fa 120 )
embeddedartists 2:887c6b45e7fa 121 {
embeddedartists 2:887c6b45e7fa 122 int ret;
embeddedartists 2:887c6b45e7fa 123
embeddedartists 2:887c6b45e7fa 124 // ret = (WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0); /* Win32 */
embeddedartists 2:887c6b45e7fa 125
embeddedartists 2:887c6b45e7fa 126 // ret = (wai_sem(sobj) == E_OK); /* uITRON */
embeddedartists 2:887c6b45e7fa 127
embeddedartists 2:887c6b45e7fa 128 // OSMutexPend(sobj, _FS_TIMEOUT, &err)); /* uC/OS-II */
embeddedartists 2:887c6b45e7fa 129 // ret = (err == OS_NO_ERR);
embeddedartists 2:887c6b45e7fa 130
embeddedartists 2:887c6b45e7fa 131 // ret = (xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE); /* FreeRTOS */
embeddedartists 2:887c6b45e7fa 132
embeddedartists 2:887c6b45e7fa 133 ret = ((*((Mutex*)sobj)).lock(_FS_TIMEOUT) == osOK); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 134 // static volatile osThreadId lastid = Thread::gettid();
embeddedartists 2:887c6b45e7fa 135 // ret = ((*((Semaphore*)sobj)).wait(_FS_TIMEOUT) == 1); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 136
embeddedartists 2:887c6b45e7fa 137 return ret;
embeddedartists 2:887c6b45e7fa 138 }
embeddedartists 2:887c6b45e7fa 139
embeddedartists 2:887c6b45e7fa 140
embeddedartists 2:887c6b45e7fa 141
embeddedartists 2:887c6b45e7fa 142 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 143 /* Release Grant to Access the Volume */
embeddedartists 2:887c6b45e7fa 144 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 145 /* This function is called on leaving file functions to unlock the volume.
embeddedartists 2:887c6b45e7fa 146 */
embeddedartists 2:887c6b45e7fa 147
embeddedartists 2:887c6b45e7fa 148 void ff_rel_grant (
embeddedartists 2:887c6b45e7fa 149 _SYNC_t sobj /* Sync object to be signaled */
embeddedartists 2:887c6b45e7fa 150 )
embeddedartists 2:887c6b45e7fa 151 {
embeddedartists 2:887c6b45e7fa 152 // ReleaseMutex(sobj); /* Win32 */
embeddedartists 2:887c6b45e7fa 153
embeddedartists 2:887c6b45e7fa 154 // sig_sem(sobj); /* uITRON */
embeddedartists 2:887c6b45e7fa 155
embeddedartists 2:887c6b45e7fa 156 // OSMutexPost(sobj); /* uC/OS-II */
embeddedartists 2:887c6b45e7fa 157
embeddedartists 2:887c6b45e7fa 158 // xSemaphoreGive(sobj); /* FreeRTOS */
embeddedartists 2:887c6b45e7fa 159
embeddedartists 2:887c6b45e7fa 160 (*((Mutex*)sobj)).unlock(); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 161 // (*((Semaphore*)sobj)).release(); /* MBED RTOS */
embeddedartists 2:887c6b45e7fa 162 }
embeddedartists 2:887c6b45e7fa 163
embeddedartists 2:887c6b45e7fa 164 #endif
embeddedartists 2:887c6b45e7fa 165
embeddedartists 2:887c6b45e7fa 166
embeddedartists 2:887c6b45e7fa 167
embeddedartists 2:887c6b45e7fa 168
embeddedartists 2:887c6b45e7fa 169 #if _USE_LFN == 3 /* LFN with a working buffer on the heap */
embeddedartists 2:887c6b45e7fa 170 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 171 /* Allocate a memory block */
embeddedartists 2:887c6b45e7fa 172 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 173 /* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
embeddedartists 2:887c6b45e7fa 174 */
embeddedartists 2:887c6b45e7fa 175
embeddedartists 2:887c6b45e7fa 176 void* ff_memalloc ( /* Returns pointer to the allocated memory block */
embeddedartists 2:887c6b45e7fa 177 UINT size /* Number of bytes to allocate */
embeddedartists 2:887c6b45e7fa 178 )
embeddedartists 2:887c6b45e7fa 179 {
embeddedartists 2:887c6b45e7fa 180 return malloc(size);
embeddedartists 2:887c6b45e7fa 181 }
embeddedartists 2:887c6b45e7fa 182
embeddedartists 2:887c6b45e7fa 183
embeddedartists 2:887c6b45e7fa 184 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 185 /* Free a memory block */
embeddedartists 2:887c6b45e7fa 186 /*------------------------------------------------------------------------*/
embeddedartists 2:887c6b45e7fa 187
embeddedartists 2:887c6b45e7fa 188 void ff_memfree(
embeddedartists 2:887c6b45e7fa 189 void* mblock /* Pointer to the memory block to free */
embeddedartists 2:887c6b45e7fa 190 )
embeddedartists 2:887c6b45e7fa 191 {
embeddedartists 2:887c6b45e7fa 192 free(mblock);
embeddedartists 2:887c6b45e7fa 193 }
embeddedartists 2:887c6b45e7fa 194
embeddedartists 2:887c6b45e7fa 195 #endif
embeddedartists 2:887c6b45e7fa 196
embeddedartists 2:887c6b45e7fa 197