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.
crc.cpp
- Committer:
- embeddedartists
- Date:
- 2013-09-26
- Revision:
- 0:bd0d999bb6fb
File content as of revision 0:bd0d999bb6fb:
/***************************************************************************** * * Copyright(C) 2011, Embedded Artists AB * All rights reserved. * ****************************************************************************** * Software that is described herein is for illustrative purposes only * which provides customers with programming information regarding the * products. This software is supplied "AS IS" without any warranties. * Embedded Artists AB assumes no responsibility or liability for the * use of the software, conveys no license or title under any patent, * copyright, or mask work right to the product. Embedded Artists AB * reserves the right to make changes in the software without * notification. Embedded Artists AB also make no representation or * warranty that such application will be suitable for the specified * use without further testing or modification. *****************************************************************************/ /****************************************************************************** * Includes *****************************************************************************/ #include "mbed.h" #include "crc.h" /****************************************************************************** * Defines and typedefs *****************************************************************************/ #define NUM_CRC_BUFF_ENTRIES (100) #define CRC32_INIT() do { LPC_CRC->MODE = 0x00000036; LPC_CRC->SEED = 0xffffffff; } while(0) #define CRC32_WRITE8(__val) LPC_CRC->WR_DATA_BYTE.DATA = (uint8_t)(__val) #define CRC32_WRITE16(__val) LPC_CRC->WR_DATA_WORD.DATA = (uint16_t)(__val) #define CRC32_WRITE32(__val) LPC_CRC->WR_DATA_DWORD.DATA = (__val) #define CRC32_SUM() LPC_CRC->SUM /****************************************************************************** * External global variables *****************************************************************************/ /****************************************************************************** * Local variables *****************************************************************************/ static uint32_t crcbuff[NUM_CRC_BUFF_ENTRIES]; /****************************************************************************** * Local Functions *****************************************************************************/ /****************************************************************************** * Public Functions *****************************************************************************/ uint32_t crc_Read(FILE* f) { CRC32_INIT(); fseek(f, 0, SEEK_SET); memset(crcbuff, 0, sizeof(uint32_t)*NUM_CRC_BUFF_ENTRIES); int numRead = fread(crcbuff, sizeof(uint32_t), 100, f); while (numRead > 0) { for (int i = 0; i < numRead; i++) { CRC32_WRITE32(crcbuff[i]); } numRead = fread(crcbuff, sizeof(uint32_t), 100, f); } return CRC32_SUM(); }