Kazuki Yamamoto / USBFileSystem

[ FORK ] USBFileSytem; fork from sissors/USBFileSystem

Dependents:   USBMSD_CDC_11U35test

Fork of USBFileSystem by Erik -

USBFileSystem.cpp@9:98a97b7d56a8, 2015-04-21 (annotated)

Committer:
k4zuki
Date:
Tue Apr 21 09:14:07 2015 +0000
Revision:
9:98a97b7d56a8
Parent:
8:a9e1dffac4bd 
update USBDevice

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 0:dabe3383ef23 1 #include "USBFileSystem.h"
Sissors 0:dabe3383ef23 2
Sissors 0:dabe3383ef23 3 #define USBWRITE_TIMEOUT 100
Sissors 0:dabe3383ef23 4
Sissors 0:dabe3383ef23 5 USBFileSystem::USBFileSystem(const char* n) : FATFileSystem_ds(n) {
Sissors 0:dabe3383ef23 6 localFunction = NULL;
Sissors 0:dabe3383ef23 7 usbFunction = NULL;
Sissors 0:dabe3383ef23 8 usbfree = true;
Sissors 0:dabe3383ef23 9 local_count = 0;
Sissors 2:9af05743d551 10 usbMode(1);
Sissors 0:dabe3383ef23 11 }
Sissors 0:dabe3383ef23 12
Sissors 0:dabe3383ef23 13
Sissors 0:dabe3383ef23 14 FileHandle* USBFileSystem::open(const char* name, int flags){
Sissors 0:dabe3383ef23 15 char n[64];
Sissors 0:dabe3383ef23 16 sprintf(n, "%d:/%s", _fsid, name);
Sissors 0:dabe3383ef23 17 bool write = true;
Sissors 0:dabe3383ef23 18
Sissors 0:dabe3383ef23 19 /* POSIX flags -> FatFS open mode */
Sissors 0:dabe3383ef23 20 BYTE openmode;
Sissors 0:dabe3383ef23 21 if (flags & O_RDWR) {
Sissors 0:dabe3383ef23 22 openmode = FA_READ|FA_WRITE;
Sissors 0:dabe3383ef23 23 localOpen(true);
Sissors 0:dabe3383ef23 24 } else if(flags & O_WRONLY) {
Sissors 0:dabe3383ef23 25 openmode = FA_WRITE;
Sissors 0:dabe3383ef23 26 localOpen(true);
Sissors 0:dabe3383ef23 27 } else {
Sissors 0:dabe3383ef23 28 openmode = FA_READ;
Sissors 0:dabe3383ef23 29 write = false;
Sissors 0:dabe3383ef23 30 }
Sissors 0:dabe3383ef23 31 if(flags & O_CREAT) {
Sissors 0:dabe3383ef23 32 if(flags & O_TRUNC) {
Sissors 0:dabe3383ef23 33 openmode |= FA_CREATE_ALWAYS;
Sissors 0:dabe3383ef23 34 } else {
Sissors 0:dabe3383ef23 35 openmode |= FA_OPEN_ALWAYS;
Sissors 0:dabe3383ef23 36 }
Sissors 0:dabe3383ef23 37 }
Sissors 0:dabe3383ef23 38
Sissors 0:dabe3383ef23 39 FIL fh;
Sissors 0:dabe3383ef23 40 FRESULT res = f_open(&fh, n, openmode);
Sissors 0:dabe3383ef23 41 if (res) {
Sissors 0:dabe3383ef23 42 if (write)
Sissors 0:dabe3383ef23 43 local_count--;
Sissors 0:dabe3383ef23 44 return NULL;
Sissors 0:dabe3383ef23 45 }
Sissors 0:dabe3383ef23 46 if (flags & O_APPEND) {
Sissors 0:dabe3383ef23 47 f_lseek(&fh, fh.fsize);
Sissors 0:dabe3383ef23 48 }
Sissors 0:dabe3383ef23 49 return new USBFileHandle(fh, this, write);
Sissors 0:dabe3383ef23 50 }
Sissors 0:dabe3383ef23 51
Sissors 0:dabe3383ef23 52 bool USBFileSystem::localSafe( void ){
Sissors 0:dabe3383ef23 53 return (local_count == 0);
Sissors 0:dabe3383ef23 54 }
Sissors 0:dabe3383ef23 55
Sissors 0:dabe3383ef23 56 bool USBFileSystem::usbSafe( void ){
Sissors 0:dabe3383ef23 57 return usbfree;
Sissors 0:dabe3383ef23 58 }
Sissors 0:dabe3383ef23 59
Sissors 0:dabe3383ef23 60 int USBFileSystem::disk_status_fat() {
Sissors 0:dabe3383ef23 61 int retval = _disk_status();
Sissors 0:dabe3383ef23 62
Sissors 0:dabe3383ef23 63 if ((retval == 0) && (!usbSafe()))
Sissors 0:dabe3383ef23 64 return 4;
Sissors 0:dabe3383ef23 65 else
Sissors 0:dabe3383ef23 66 return retval;
Sissors 0:dabe3383ef23 67 }
Sissors 0:dabe3383ef23 68
Sissors 0:dabe3383ef23 69 int USBFileSystem::disk_status_msd() {
Sissors 0:dabe3383ef23 70 int retval = _disk_status();
Sissors 0:dabe3383ef23 71
Sissors 0:dabe3383ef23 72 if ((retval == 0) && (!localSafe()))
Sissors 0:dabe3383ef23 73 return 4;
Sissors 0:dabe3383ef23 74 else
Sissors 0:dabe3383ef23 75 return retval;
Sissors 0:dabe3383ef23 76 }
Sissors 0:dabe3383ef23 77
Sissors 6:15b73dae124e 78 int USBFileSystem::disk_write(const uint8_t * data, uint64_t block, uint8_t count) {
Sissors 0:dabe3383ef23 79 if (localSafe()) {
Sissors 0:dabe3383ef23 80 if (usbfree && (usbFunction!=NULL) )
Sissors 0:dabe3383ef23 81 usbFunction(false);
Sissors 0:dabe3383ef23 82
Sissors 0:dabe3383ef23 83 usbfree = false;
Sissors 0:dabe3383ef23 84 }
Sissors 0:dabe3383ef23 85
Sissors 8:a9e1dffac4bd 86 int retval= _disk_write(data, block, count);
Sissors 0:dabe3383ef23 87
Sissors 0:dabe3383ef23 88 if (localSafe())
Sissors 0:dabe3383ef23 89 usb_write.attach_us(this, &USBFileSystem::usbFree, USBWRITE_TIMEOUT * 1000);
Sissors 0:dabe3383ef23 90
Sissors 0:dabe3383ef23 91 return retval;
Sissors 0:dabe3383ef23 92 }
Sissors 0:dabe3383ef23 93
Sissors 0:dabe3383ef23 94 void USBFileSystem::localOpen(bool open) {
Sissors 0:dabe3383ef23 95 if (open) {
Sissors 0:dabe3383ef23 96 local_count++;
Sissors 0:dabe3383ef23 97 } else {
Sissors 0:dabe3383ef23 98 local_count--;
Sissors 0:dabe3383ef23 99 }
Sissors 0:dabe3383ef23 100
Sissors 0:dabe3383ef23 101 //Pseudo-IRQ
Sissors 1:4ba08d11e36e 102 if (open && (local_count == 1)) {
Sissors 1:4ba08d11e36e 103 if (usbmode == 1)
Sissors 1:4ba08d11e36e 104 disconnect();
Sissors 1:4ba08d11e36e 105 if (localFunction != NULL)
Sissors 0:dabe3383ef23 106 (*localFunction)(false);
Sissors 1:4ba08d11e36e 107 }
Sissors 1:4ba08d11e36e 108 if (!open && (local_count == 0)) {
Sissors 1:4ba08d11e36e 109 if (usbmode == 1)
Sissors 1:4ba08d11e36e 110 connect();
Sissors 1:4ba08d11e36e 111 if (localFunction != NULL)
Sissors 0:dabe3383ef23 112 (*localFunction)(true);
Sissors 0:dabe3383ef23 113 }
Sissors 0:dabe3383ef23 114 }
Sissors 0:dabe3383ef23 115
Sissors 0:dabe3383ef23 116 void USBFileSystem::attachLocal(void (*function)(bool)) {
Sissors 0:dabe3383ef23 117 localFunction = function;
Sissors 0:dabe3383ef23 118 }
Sissors 0:dabe3383ef23 119
Sissors 0:dabe3383ef23 120 void USBFileSystem::attachUSB(void (*function)(bool)) {
Sissors 0:dabe3383ef23 121 usbFunction = function;
Sissors 0:dabe3383ef23 122 }
Sissors 0:dabe3383ef23 123
Sissors 0:dabe3383ef23 124 void USBFileSystem::usbFree( void ) {
Sissors 0:dabe3383ef23 125 usbfree = true;
Sissors 0:dabe3383ef23 126 if (usbFunction != NULL)
Sissors 0:dabe3383ef23 127 usbFunction(true);
Sissors 1:4ba08d11e36e 128 }
Sissors 1:4ba08d11e36e 129
Sissors 1:4ba08d11e36e 130 void USBFileSystem::usbMode(int mode) {
Sissors 1:4ba08d11e36e 131 usbmode = mode;
Sissors 0:dabe3383ef23 132 }