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.
Diff: crc.cpp
- Revision:
- 0:bd0d999bb6fb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/crc.cpp Thu Sep 26 09:21:11 2013 +0000 @@ -0,0 +1,76 @@ +/***************************************************************************** + * + * 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(); +} +