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@2:887c6b45e7fa, 2014-12-02 (annotated)

Committer:
embeddedartists
Date:
Tue Dec 02 15:21:18 2014 +0000
Revision:
2:887c6b45e7fa
Added RTOS-safe logger (RtosLog). Switched USBHost library so that it works in an RTOS setting. Modified the FAT file system to work in an RTOS setting.

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