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The purpose of this application is to allow easy manipulation of the QSPI file system from a PC
Dependencies: EALib USBDevice mbed
The purpose of this application is to allow easy manipulation of the QSPI file system from a PC.
The application makes the LPC4088 QuickStart Board appear as a USB Memory Stick when connected to a PC. The PC will see the current content of the QSPI file system plus an image file of the file system that can be downloaded and (at a later time) be used to restore the file system to it's current state.
To use this application:
- Make sure that the QSPI file system has been formatted (using either the app_qspi_format application or one of the erase.* images).
- Download the app_qspifs_memstick application using drag-n-drop and then reset the board
- Optionally start a terminal program to read the status messages from the application
- Connect a USB cable to the micro USB slot on the back of the LPC4088 QuickStart Board, underneath the ethernet connector, and then to the PC
- The PC will install drivers if needed and then the USB Memory Stick will be available as a new drive
- Modify the file system to suit your needs
- With the USB cable still connected, press the button on the LPC4088 QuickStart Board
- The application will now:
- disconnect the USB Memory Stick
- write all changes to the QSPI flash memory
- create a new image file of the updated QSPI file system and store it in the .current/ folder
- connect the USB Memory Stick again
- Continue from step 6. until satisfied
Note 1: The file system that is exposed is a copy (in SDRAM) of the QSPI file system. The reason for this is that the USBMSD class requires a FAT file system.
Note 2: The image files created in step 8.3 above will be a *.fsX file (where the 'X' is the size of the file system in MB so *.fs1 for a 1MByte file system). The *.fsX file extensions are recognized by the HDK and can be used to drag-n-drop to the MBED drive in the same way as the *.bin files are. A *.fsX file will not overwrite the program stored in internal flash.
RAMFileSystem.cpp@0:bd0d999bb6fb, 2013-09-26 (annotated)
- Committer:
- embeddedartists
- Date:
- Thu Sep 26 09:21:11 2013 +0000
- Revision:
- 0:bd0d999bb6fb
- Child:
- 2:5a954ee65b33
First version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
embeddedartists | 0:bd0d999bb6fb | 1 | #include "RAMFileSystem.h" |
embeddedartists | 0:bd0d999bb6fb | 2 | #include "mbed_debug.h" |
embeddedartists | 0:bd0d999bb6fb | 3 | |
embeddedartists | 0:bd0d999bb6fb | 4 | #define RAMFS_DBG 0 |
embeddedartists | 0:bd0d999bb6fb | 5 | |
embeddedartists | 0:bd0d999bb6fb | 6 | #define SECTOR_SIZE 512 |
embeddedartists | 0:bd0d999bb6fb | 7 | |
embeddedartists | 0:bd0d999bb6fb | 8 | RAMFileSystem::RAMFileSystem(uint32_t addr, uint32_t size, const char* name) : |
embeddedartists | 0:bd0d999bb6fb | 9 | FATFileSystem(name) { |
embeddedartists | 0:bd0d999bb6fb | 10 | memStart = addr; |
embeddedartists | 0:bd0d999bb6fb | 11 | memSize = size - (size % SECTOR_SIZE); |
embeddedartists | 0:bd0d999bb6fb | 12 | status = 1; //1: disk not initialized |
embeddedartists | 0:bd0d999bb6fb | 13 | } |
embeddedartists | 0:bd0d999bb6fb | 14 | |
embeddedartists | 0:bd0d999bb6fb | 15 | int RAMFileSystem::disk_initialize() { |
embeddedartists | 0:bd0d999bb6fb | 16 | debug_if(RAMFS_DBG, "init RAM fs\n"); |
embeddedartists | 0:bd0d999bb6fb | 17 | status = 0; //OK |
embeddedartists | 0:bd0d999bb6fb | 18 | return status; |
embeddedartists | 0:bd0d999bb6fb | 19 | } |
embeddedartists | 0:bd0d999bb6fb | 20 | |
embeddedartists | 0:bd0d999bb6fb | 21 | int RAMFileSystem::disk_write(const uint8_t *buffer, uint64_t sector) { |
embeddedartists | 0:bd0d999bb6fb | 22 | debug_if(RAMFS_DBG, "write to sector %llu\n", sector); |
embeddedartists | 0:bd0d999bb6fb | 23 | if (sector >= disk_sectors()) { |
embeddedartists | 0:bd0d999bb6fb | 24 | return 1; |
embeddedartists | 0:bd0d999bb6fb | 25 | } |
embeddedartists | 0:bd0d999bb6fb | 26 | |
embeddedartists | 0:bd0d999bb6fb | 27 | memcpy((uint8_t*)(memStart + SECTOR_SIZE*((uint32_t)sector)), buffer, SECTOR_SIZE); |
embeddedartists | 0:bd0d999bb6fb | 28 | return 0; |
embeddedartists | 0:bd0d999bb6fb | 29 | } |
embeddedartists | 0:bd0d999bb6fb | 30 | |
embeddedartists | 0:bd0d999bb6fb | 31 | int RAMFileSystem::disk_read(uint8_t *buffer, uint64_t sector) { |
embeddedartists | 0:bd0d999bb6fb | 32 | debug_if(RAMFS_DBG, "read from sector %llu\n", sector); |
embeddedartists | 0:bd0d999bb6fb | 33 | if (sector >= disk_sectors()) { |
embeddedartists | 0:bd0d999bb6fb | 34 | return 1; |
embeddedartists | 0:bd0d999bb6fb | 35 | } |
embeddedartists | 0:bd0d999bb6fb | 36 | |
embeddedartists | 0:bd0d999bb6fb | 37 | memcpy(buffer, (uint8_t*)(memStart + SECTOR_SIZE*((uint32_t)sector)), SECTOR_SIZE); |
embeddedartists | 0:bd0d999bb6fb | 38 | return 0; |
embeddedartists | 0:bd0d999bb6fb | 39 | } |
embeddedartists | 0:bd0d999bb6fb | 40 | |
embeddedartists | 0:bd0d999bb6fb | 41 | int RAMFileSystem::disk_status() { |
embeddedartists | 0:bd0d999bb6fb | 42 | debug_if(RAMFS_DBG, "disk status %d\n", status); |
embeddedartists | 0:bd0d999bb6fb | 43 | return status; |
embeddedartists | 0:bd0d999bb6fb | 44 | } |
embeddedartists | 0:bd0d999bb6fb | 45 | int RAMFileSystem::disk_sync() { |
embeddedartists | 0:bd0d999bb6fb | 46 | return 0; |
embeddedartists | 0:bd0d999bb6fb | 47 | } |
embeddedartists | 0:bd0d999bb6fb | 48 | uint64_t RAMFileSystem::disk_sectors() { |
embeddedartists | 0:bd0d999bb6fb | 49 | debug_if(RAMFS_DBG, "returning fs has %u sectors\n", memSize/SECTOR_SIZE); |
embeddedartists | 0:bd0d999bb6fb | 50 | return memSize/SECTOR_SIZE; |
embeddedartists | 0:bd0d999bb6fb | 51 | } |
embeddedartists | 0:bd0d999bb6fb | 52 | |
embeddedartists | 0:bd0d999bb6fb | 53 | uint64_t RAMFileSystem::disk_size() { |
embeddedartists | 0:bd0d999bb6fb | 54 | return memSize; |
embeddedartists | 0:bd0d999bb6fb | 55 | } |
embeddedartists | 0:bd0d999bb6fb | 56 |