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AN11305 USB In-System Programming with the LPC11U3X

1. Device Model ID is LPC1XXX_IFLASH Correct model ID found Searching for disk devices with matching device path Checking disk dev sda Checking disk dev sdb Match found Disk device is dev sdb LPC ISP disk path media CRP DISABLD firmware bin LPC ISP flash size new firmware size 131072 131072 Volume Label CRP DISABLD 128 0 records in 128 0 records out 131072 bytes 131 kB copied 0 102324 s 1 3 MB s Firmware update complete Device unmounted ubuntu Desktop Fig 7 Ubuntu NXPISP Utility bash script chmod x LinuxNXPISP sh then run from command prompt with LinuxNXPISP sh firmware bin 6 3 Mac NXPISP ISP utility The Mac NXPISP ISP utility is an executable that should run on any Intel Mac running OS 10 5 or newer To run it open a Terminal window which can be found using a Spotlight search In the terminal window navigate to where you have placed the program using the cd command If the executable has been extracted from a zip file it may not be marked with execute permissions Use chmod x filename to remedy this Finally run the program with a single argument the path to the bin file you wish to program If the ISP device is already connected to the Mac it will be updated immediately and the tool will exit If no device is connected the tool will wait until a USB ISP device is connected to the Mac then update it and quit AN11305 All information provided in this document is subject to legal d
2. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information 8 2 Disclaimers Limited warranty and liability Information in this document is believed to be accurate and reliable However NXP Semiconductors does not give any representations or warranties expressed or implied as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information In no event shall NXP Semiconductors be liable for any indirect incidental punitive special or consequential damages including without limitation lost profits lost savings business interruption costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligence warranty breach of contract or any other legal theory Notwithstanding any damages that customer might incur for any reason whatsoever NXP Semiconductors aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors Right to make changes NXP Semiconductors reserves the right to make changes to information published in this document including without limitation specifications and product descriptions at any t
3. Fig 6 Windows NXPISP Utility C language Microsoft Visual Studio 2010 6 2 Linux LinuxNXPISP sh ISP utility The LinuxNXPISP sh ISP utility is a bash shell script that will run in Ubuntu 10 04 To run it open a Terminal window which can be found in the Accessories submenu of the Applications menu on the Ubuntu desktop In the terminal window navigate to where you have placed the script using the cd command If the script has been extracted from a zip file it may not be marked with executable permissions Use chmod x filename to remedy this Finally ensure that the USB ISP device to be programmed is already connected to the PC and run the script with a single argument the path to the bin file you wish to program AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 13 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X ubuntu Desktop File Edit View Search Terminal Help Model does not match Not NXP_LPC1XXX IFLASH ubuntu Desktop C ubuntu Desktop LinuxNXPISP 11U sh Blinky bin Searching for NXP LPC1xxx MCU in USB ISP mode ubuntu Desktop LinuxNXPISP 11U sh Blinky bin Searching for NXP LPC1xxx MCU in USB ISP mode Found USB bus number 002 device number 020 Linux UDEV device path should be dev bus usb 02 020 Now reading USB device info
4. can be written After deleting firmware bin the device needs to be powered down and reconnected in order for the change to CRP settings to take effect so that the firmware can be updated If CRP 3 is enabled the device cannot be erased and the firmware cannot be updated AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 7 of 17 NXP Semiconductors AN1 1 305 AN11305 USB In System Programming with the LPC11U3X LPC11U2X 4 4 Writing the file into program flash 4 5 In Windows almost any standard filesystem write sequence will work properly as the Windows variant of the FAT filesystem allocates blocks sequentially beginning at the first free block on the ISP disk In Linux the device itself could be written directly in dev using dd to ensure block ordering This technique is not recommended because it requires that the user have administrative permissions A second option is to open the existing firmware bin file on the USB ISP disk and overwrite the contents If the file is opened without truncation then the new data will be written with the same order as the existing file that is set up by the ISP firmware remember the file metadata is created by the rom code and not stored in flash Overwriting can be accomplished using dd to write to firmware bin with the conv nocreat notrunc option If coding in the C lan
5. AN11305 USB In System Programming with the LPC11U3X LPC11U2X Rev 1 7 January 2013 Application note Document information Info Content Keywords LPC11U2X LPC11U3X USB In System Programming ISP Mass Storage Class MSC Cortex M0 Windows Apple OS X Linux Abstract This application note explains how to use the on chip USB In System Programming feature of LPC11UXX Cortex MO based microcontroller to update firmware in on chip flash memory on Windows Apple OS X and Linux operating systems NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X Revision history Rev Date Description 1 20130107 Initial version Contact information For additional information please visit http Avww nxp com For sales office addresses please send an email to salesaddresses nxp com AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 2 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X 1 Introduction The LPC11UXX microcontroller family is based on the ARM Cortex M0 CPU architecture for embedded applications featuring a high level of support block integration and low power consumption The peripheral complement of the LPC11UXX series includes up to 128 kB of flash memory up to 12 kB of data memory USB Device interface 1 UART 1 S
6. ISP details AN11305 The LPC11U37 s on chip USB ISP firmware emulates a FAT filesystem to facilitate firmware reading and writing by PC software We will describe details of the filesystem emulation and techniques to update the firmware using several standard host operating systems When LPC11U37 is connected to a USB host and USB ISP mode is initiated it enumerates as USB Vendor ID 0x1FcC9 and Device ID 0x000F This information is usually hidden from the end user but it can be used by firmware updating software to find the LPC11U37 among the USB devices connected to a PC Once the device has been found a Mass Storage Class Inquiry command can be sent This will return a string describing the LPC microcontroller product attached The Inquiry string for the LPC11U37 LPC11U24 products reads NXP LPC1XXX IFLASH 1 0 The device can also be recognized by its device vendor which is NXP and device model which is LPC1XXX IFLASH Finally there is a model ID which is NxP_LPC1XXX_IFLASH All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 4 of 17 NXP Semiconductors AN1 1 305 AN11305 USB In System Programming with the LPC11U3X LPC11U2X The disk emulated by the LPC11U37 has different volume labels depending on the Code Read Protect CRP settings and slightly different behavior during reprogramming A brief s
7. ISP devices If one is found its firmware will be updated and a green checkmark will be displayed to the right of the Update Firmware button and the button will release If no devices are found the Update Firmware button will stay depressed and the tool will wait for a device to be connected After a device is found and updated a green checkmark will be displayed and the Update Firmware button will pop out If the utility is awaiting a device connection Update Firmware button is still depressed it can be canceled by clicking on the Update Firmware button again and causing it to pop out Once the update has completed it is important to safely eject the USB ISP device to ensure that the new firmware has been written to it since the Windows NXPISP tool does not unmount the device Safe ejection can be performed with Window s eject hardware icon or the eject option in the Windows Explorer Failure to complete this step may result in corrupt firmware All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 12 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X RE NXPI Jog Firmware Path C nxp21346 Projects App Notes USB ROM Bootloader App Note Test Firmware USBHID_rom bin e 1 Firmware has been updated Please safely eject device D
8. SP controller SPI interface 12C interface 8 channel 10 bit ADC 4 general purpose timer PWMs and up to 54 general purpose I O pins Also present is an on chip ROM containing In System Programming capability a bootloader supporting UART and USB flash programming as well as APIs for user code The flash API implements a simple interface to the on board flash programming functionality and allows entry to ISP mode at any time The USB API supports development of Human Interface Devices HID and Mass Storage Class MSC devices without requiring driver code to be written by the customer or stored in flash Not present in the LPC11U1X series of MCU s The various topics covered in this application note are as follows USB In System Programming overview USB ISP details Automating USB ISP Automating entry of USB ISP Sample software oar WN Conclusion 2 USB In System Programming ISP overview The LPC11UXX s on chip USB ISP firmware enables programming and updating of firmware in the field by end users using standard personal computer operating systems This document will reference the LPC11U37 401 in particular but the procedures should also apply to other LPC11U37 and LPC11U24 family products with on chip USB Holding PIOO_1 low during power up will trigger the on chip ISP firmware to enter ISP mode unless it is disabled by the NO_ISP code read protection CRP mode Once ISP mode has been entered the USB VB
9. US line PIOO_3 is checked If high then USB ISP will be entered If low UART ISP will be entered instead The diagram in the User s Manual titled Boot Process Flowchart explains this process in greater detail Upon entry to USB ISP mode the LPC11U37 part will enable the on chip USB full speed interface as a mass storage class device This disk device will contain a FAT12 filesystem which will appear as a standard disk device in most operating systems The label of the disk will indicate the CRP status and the disk will contain a single file firmware bin Deleting and rewriting this file will write to the flash memory if allowed by the code protect settings Reading the contents of flash memory is as simple as copying the firmware bin file AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 3 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X Fig 1 LPC11U37 USB ISP system C e em gt Computer gt CRP DISABLD E p Search CRP DISABLD E Organize Share with Burn New folder gzz d Music Name Date modified Type Pictures firmware bin 2 6 2009 10 10 AM BIN File f Videos jml Computer amp AWS System C ew CRP DISABLD E ca USB DISK F Fig 2 USB ISP firmware bin file as seen in Windows XP 3 USB
10. ash memory in the LPC microcontroller being used This size matching is useful to help the ISP download program on the PC host ensure that the firmware is designed for the particular LPC 11U37 part connected to USB Below are screen shots and descriptions of each of the three firmware downloading tools Windows NXPISP utility This program is based on Microsoft NET and when the setup exe program is run to start it the bundled Visual Studio Installer will check the PC and download the latest version of NET if it is not already installed For this reason make sure you are connected to the Internet through a broadband connection the first time you run this setup exe program After the Windows NET subsystem is updated the NXPISP program will be installed and automatically started Once NXPISP is running click Select Firmware A file chooser dialog will pop up and allow you to select a bin file This bin file will be checked against the Criterion for Valid User Code which is simply that the first 8 32 bit words of the vector table sum to zero If the bin file looks good a green checkmark will be displayed to the right of the Select Firmware button Otherwise a red X will be displayed To actually program a device click Update Firmware The Update Firmware button works like a toggle and can stay depressed when clicked or release when it is clicked again When the button is pressed the PC will be scanned for NXP
11. can be used to write new firmware to the LPC11U37 In a Windows Explorer window a user can delete firmware bin and drag over a new file to program the flash Unfortunately FAT filesystems on Mac and Linux machines tend to allocate blocks to files in a different order All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 5 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X which results in data being written onto the ISP disk and consequently firmware being written to flash being reordered This will cause the firmware update to be unsuccessful There are two workarounds for this The most general workaround is to overwrite the firmware bin file in place A more brute force option that requires administrative privileges to do direct disk device writes to dev 4 Automating USB ISP 4 1 AN11305 Sometimes a system requirement is for firmware updates to be performed without user intervention Asking a user to determine which disk drive links to a USB device or asking them to manually delete and rewrite a file is often too complex Firmware often needs to be updated automatically under control of a PC program This section will describe how this can be accomplished To fully automate this process on the PC side a program should find the correct USB device to be updated convert th
12. ce file path is looked up with udevadm info q path n dev sdx The file path returned should begin with the low level usb device file path if that disk device is associated with the USB device we found 4 Finally the output of the mount command is used to determine where the disk device name tested in step 2 is mounted in the linux filesystem Now we have a filesystem path for our USB ISP device and can access firmware bin Under Mac and Windows we start out with a disk handle instead of a USB device handle and query the operating system for the disk letter or filesystem path 4 3 Checking for Code Read Protection CRP The LPC11U37 USB ISP feature sets the label of the USB disk to indicate CRP mode A robust design for a USB ISP flash programmer would check the disk label to make sure that CRP is not enabled In Linux FAT disk filesystem labels can be read with the mtools package Unfortunately this is not recommended because it requires administrative access Another way to read filesystem labels in Linux is to use the mount 1 command if it is supported by your system s version of mount This will list all of the mounted filesystems and their labels On the Mac and on Windows the disk label information shows up in the DiskDescription dictionary or in the Volume object retrieved from WMI respectively If CRP 1 or CRP 2 is enabled the firmware bin file on the USB ISP disk must be deleted to disable code protection before new firmware
13. e USB device handle into a file path check the CRP mode write to the file to program flash and finally unmount the disk device to ensure that the flash contents are written These steps will be discussed separately It can also be useful to validate the firmware file to be programmed This can be verified using the Criterion for Valid User Code in the LPC11U37 LPC11U24 User s Manual which is implemented in the Windows ISP tool It is also possible to validate that the file is the same length as the flash space on the device to be programmed This is implemented on the Mac and Linux ISP examples Note Some deviation from these exact steps is okay to simplify implementation on various operating systems Finding the correct USB device The technique used to enumerate USB devices varies depending on the operating system On Linux most distributions provide a program called 1susb which can search for a USB device with a specific Vendor ID and Product ID 1FC9 000F Afterward udevadm present on systems using the udev device filesystem can be used to list the USB Model ID and system device path The Model ID should be NXP_LPC1XXX_IFLASH for the LPC11U37 family Once the Vendor ID Product ID and Model ID are confirmed you are assured to have found an NXP LPC11U37 microcontroller that is in ISP mode Under Windows and Mac OS X this step is a little bit different Since the USB device model information is available from the disk vo
14. guage it is possible to use open path O_RDWR or fopen path r Again in Windows there is no requirement to overwrite the existing file so any file write scheme can be used as long as it either overwrites or deletes the current file so that free space is available to write the new data In our Windows sample program we use the C function System 10 File WriteAllBytes filePath firmwareData which does a truncate operation before writing Unmounting the disk device Most operating systems will eventually complete writes to disk after a delay but forcing an unmount is a helpful final step to ensure that the operating system has finished writing data to disk so the user can be informed that it is okay to remove the device For the unmount operation to succeed all open files including the irmware bin file must be closed first In Linux the posix standard umount command can be used Usually no administrator access is required to unmount automatically mounted USB mass storage devices On the Mac since mounting is handled automatically by the Disk Arbiter the best route is to use the DADiskUnmount system call On Windows most users are used to unmounting disks themselves or the CM_Request_Device_Eject function in the SetupAPI can be used to do it for them Our sample Windows ISP updater does not unmount the device when it is finished instead it displays a dialog reminding the user to do it All information provided in this document
15. iisisieissisdinsssienssassansnss taas 4 4 Automating USB ISP saassansnesnnnnnnnnnnnnnnnnnnnnnnnnnnnn 6 4 1 Finding the correct USB device eceeeee 6 4 2 Converting a USB device handle into a file path 7 4 3 Checking for Code Read Protection CRP 7 4 4 Writing the file into program flash 8 4 5 Unmounting the disk device ee eeeteeeeeeeee 8 5 Automating entry of USB ISP csscsseeeeee 10 6 Sample software cseccsseccsseeeeeeeeeseeeeseeenseeeeeeee 11 6 1 Windows NXPISP utility 0 00 eeeeeeeeeee 12 6 2 Linux LinuxNXPISP sh ISP utility ee 13 6 3 Mac NXPISP ISP utility 00 0 0 eeeeeeeeee 14 7 CONCIUSION osiccssietccccccsiitcccctcsncecsctestaeecceexsizeccentes 15 8 Legal information ccssseeessseeeeseseeensseeeenseee 16 8 1 Definitions 200 eee eee e eee eeteeeeeeeeeteeeeneeetteeeeeees 16 8 2 Disclaimers monn nnns minen an 16 8 3 Trademarks eeseeeeeeseeeesesneeeeeeneeeeeenneeeeenaees 16 9 ETT 17 Please be aware that important notices concerning this document and the product s described herein have been included in the section Legal information NXP B V 2013 All rights reserved For more information please visit http www nxp com For sales office addresses please send an please send an email to salesaddresses nxp com Date of release 7 January 2013 Document identifier AN11305
16. ime and without notice This document supersedes and replaces all information supplied prior to the publication hereof Suitability for use NXP Semiconductors products are not designed authorized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or AN11305 All information provided in this document is subject to legal disclaimers malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applications Applications that are described herein for any of these products are for illustrative purposes only NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products and NXP Semiconductors accepts no liability for any assistance with applications or customer product design It is customer s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer s applications and products planned as well a
17. is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 8 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X Stan again or fail Fig 4 Host side Automatable process to updaie flash AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 9 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X 5 Automating entry of USB ISP AN11305 In the previous section we explained the PC process to update the firmware of a device once it has already been placed in USB ISP mode NXP LPC11U37 microcontrollers enter ISP mode by default when no firmware is programmed or they can be placed in ISP mode by pulling a pin low PIOO 1 on the LPC11U3X LPC11U2X family and resetting or power cycling the device Sometimes it is not desired to require a user to press a button while connecting the device to invoke ISP mode for firmware updates In this case the firmware can be designed to allow programmatic entry into ISP mode Programmatic entry into ISP mode is accomplished with a call to the In Application Programming API in the LPC11U37 on chip ROM After the firmware is updated the user will need to power cycle the device in order to start the new firmware Alternately the firmwa
18. isclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 14 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X eA A nxp bash 80x24 re Last login Fri Nov 9 12 06 41 on ttys000 ie s MacBook Air nxp 9 Users nxp Library Developer Xcode DerivedD ata NXPISP dabfvcvpqxncambcpeafobapucrs Build Products Debug NXPISP Desktop Blin ky bin NXPISP will flash Desktop Blinky bin into the next NXP ISP device connected to t his mac Reprogramming device NXPISP successfully updated the devices firmware itiemew s MacBook Air naps J Fig 8 Mac OS X NXPISP Utility C language Xcode 7 Conclusion In conclusion the on chip USB mass storage in circuit programming feature in the LPC11U37 LPC11U24 family of microcontrollers can simplify manual firmware downloads during the development process as well as support automated updates in the field AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 15 of 17 NXP Semiconductors AN11305 USB In System Programming with the LPC11U3X LPC11U2X 8 Legal information 8 1 Definitions Draft The document is a draft version only The content is still under internal review and subject to formal approval which may result in modifications or additions
19. lume database on the Mac no attempt is made to find the actual USB device Instead the disk devices are checked until one with the correct Vendor and Device Model is found A similar process is used under Windows with the help of the iTuner UsbManager class to retrieve disk information under Windows All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 6 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X 4 2 Converting a USB device handle into a file path In Linux a USB device handle can be converted into a file path by iterating through all of the disk drives in the udev filesystem and querying udevadn for their system device paths until a match is found with the ISP USB device 1 lsusb is called with the Vendor ID and Product ID of the NXP ISP device 1FC9 000F 1susb outputs the bus and device ID to standard out the console This output is captured and used to create a udev path for the USB device For example bus 2 device 3 would be dev bus usb 002 003 2 A disk device name is pulled from dev In our sample script we use a wildcard match to dev sd a z and loop through all devices matching this pattern dev sda dev sdb dev sdc etc This will find all disk drives on the system including hard disks as well as USB mass storage devices 3 The complete low level disk devi
20. mware image CRP2 CRP2 ENABLD The user flash content cannot be read but can be updated The entire user flash memory is erased before writing the new firmware image CRP3 CRP3 ENABLD The user flash content cannot be read or updated The bootloader always executes the user application if valid Fig 3 LPC11U37 User s Manual CRP disk volume labels The FAT filesystem emulated by the boot ROM consist of a single file called firmware bin which contains the entire flash contents of the part Normally a disk must be slightly larger than the required storage due to the directory and allocation table overhead of the filesystem In the case of the LPC11U37 s emulated FAT filesystem four extra blocks are needed for the boot block root directory and file allocation table Because it is required to be able to program all of the flash memory in the MCU using ISP these extra blocks are emulated using data from RAM and ROM rather than being mapped into the flash used for code storage Because of this no filesystem metadata is saved when power is lost only data programmed into flash via file writes is saved The data written to the filesystem is organized in flash by disk block order with the beginning of flash starting at block 4 If firmware bin is deleted PCs running windows will allocate any new file starting at block 4 and using increasing block numbers as more data is written This means that in Windows any standard program or tool
21. om the iTuner AN11305 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 11 of 17 NXP Semiconductors AN1 1 305 AN11305 6 1 USB In System Programming with the LPC11U3X LPC11U2X http ituner codeplex com project It is covered under an open source license that requires disclosure of the source code of derivative works Also included with this application note is a blinky program implementing code read protection This program developed under the LPCXpresso IDE will flash the LED on the NGX board There are five compiled versions of the program included so that a test device can be repeatedly reprogrammed with various CRP modes and LED blinking counting rates for testing A program called autoisp is included This sample demonstrates how to enter ISP mode under program control It blinks an LED TEST2 for 10 seconds and then ISP mode is entered If the device is connected to a PC it should enumerate and the firmware should be flashed During this time while the LPC11U37 is in ISP mode the watchdog timer continues to operate After it times out the LPC11U37 will reset and run the newly flashed firmware Finally a small command line program called padto is included This program is used for taking the binary output from development tools and padding them with OxFF bytes until they match the size of the fl
22. re can pre configure the watchdog timer to reset the LPC11U37 after the new firmware has been downloaded A flow chart is printed below showing the device side automated ISP process A software example is provided called autoisp to demonstrate this technique All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Application note Rev 1 7 January 2013 10 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X Yes Fig 5 Target side Automatable process to update flash 6 Sample software To accelerate the process of building a customer friendly firmware updating tool NXP has released three implementations of an ISP download program and provided source code A Windows Forms based C application running in Windows XP Windows Vista and Windows 7 is provided The Windows application was developed using Microsoft Visual Studio C Express 2010 A command line tool written in C is provided for the Mac It was developed in Apple Xcode and runs on OS X 10 5 or higher Finally a bash shell script is provided for Ubuntu Linux It has been tested in Ubuntu 10 04 and may work in other variants of Linux that have the same underlying udev filesystem and tools installed All of these tools have open unrestricted licenses for reuse except the Windows application which depends on a USB disk device class library fr
23. s for the planned application and use of customer s third party customer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s applications or products or the application or use by customer s third party customer s Customer is responsible for doing all necessary testing for the customer s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer s third party customer s NXP does not accept any liability in this respect Export control This document as well as the item s described herein may be subject to export control regulations Export might require a prior authorization from national authorities 8 3 Trademarks Notice All referenced brands product names service names and trademarks are property of their respective owners NXP B V 2013 All rights reserved Application note Rev 1 7 January 20132 16 of 17 NXP Semiconductors AN1 1 305 USB In System Programming with the LPC11U3X LPC11U2X 9 Contents 1 Introduction sicsisccsnsstesessccccecnsscsceanssiececcnssentsatencnnee 3 2 USB In System Programming ISP overview 3 3 USB ISP detailSii brsiis
24. ummary of this behavior is printed below but the complete documentation is available in the LPC11U37 User s Manual UM10462 If CRP1 or CRP2 is enabled the user flash is erased when the file is deleted and reprogrammed when the new file is copied If CRP1 is enabled or no CRP is selected the user flash is erased and reprogrammed when the new file is copied However only the area occupied by the new file is erased and reprogrammed Because of this ideally the new programming file would contain the full flash contents 128 kB for the LPC11U37 so that all of the flash would be in a known state Using a padded 128 kB or flash size programming file also provides a means for the programming tool to error check that the correct LPC part is connected by comparing file sizes of the new firmware and the firmware bin on the device without additional configuration information Remark The only Windows commands supported for the LPC11U37 flash image folder are copy and delete Overwrite operations using the Windows Explorer will not be successful as there is insufficient room on the emulated disk to store the temporary file created by Windows during the overwrite process Table 286 CRP levels for USB boot images CRP status Volume label Description No CRP CRP DISABLD The user flash can be read or written CRP1 CRP1ENABLD The user flash content cannot be read but can be updated The flash memory sectors are updated depending on the new fir

AN11305 USB In-System Programming with the LPC11U3X

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