Example description

  
DESCRIPTION
===========

  This example project shows how to use the IAR Embedded Workbench for ARM
 to develop code for IAR-LP1768-SK board.
  The USB Bootloader example implements USB Mass Storage Device on the
 microcontroller's flash memory. This enables the whole microcontroller's flash
 to be accessed by PC via USB. The first 16KB are used by the USB bootloader.
 The rest of the flash can be used by user program.
  On start up the USB bootloader will check for valid user program at address 
 0x00004000. If there is no user code or WAKE-UP button is pressed (if CRP3 is 
 selected the bootloader will not check for pressed WAKE-UP button) the USB Mass
 Storage is starded. Else the User program is started.
  
 User Program Build:
  In order to be able to load user program with the USB bootloader you should do:
  1. Link the user program at start address 0x4000. You can do this by simply
     using the \arm\examples\NXP\LPC17xx\IAR-LPC-1768-SK
     \USBBoot\config\LPC1768_UserFlash.icf file.
  2. Build a binary image of the user program: Select Project\Options\Output Converter
     Check the "Generate additional output" box and select "binary"

 To download a user program:
  1. Program the USB Bootloader example on the target board (IAR-LP1768-SK). 
  2. Reset the board with WAKE_UP button pressed.
  3. Connect the board to PC with USB cable. A disk drive will appear on your PC.
    If you connect it for a first time Windows will automatically load the proper
    device driver. Device name depends of the Code Read Protection level (CPR) you
    have selected for USB Bootloader example (defined in DiskImg.h).
  4. The disk drive contains two files USBOOT.BIN and FIRMWARE.BIN. Delete the 
    FIRMWARE.BIN file (this will erase the user flash array).
  6. Copy the user program bin file to the "CRP " disk. 
  
  7. Reset the board. The user program should start.
  
  To load new user program repeat from step 2.

You can find some ot the IAR-LPC1768-SK examples bin files at
    \arm\examples\NXP\LPC17xx\IAR-LPC-1768-SK\USBBoot\bin
  
Note: The USBBOOT.BIN can be also delited from the disk. This will erase the first
16KB flash (if CRP is disabled) or the whole flash memory (if CRP1, CPR2 or CRP3 
is enalbed). Since the USB Bootloader resides in the first 16KB flash the demo will
hang. This however can be used to disable CRP if it was previously enabled. The other
way is to use ISP.

Note: If CRP3 is selected, no future factory testing can be performed on the device

COMPATIBILITY
=============

  The USB Bootloader project is compatible with IAR-LP1768-SK evaluation board. 
  By default the project is configured to use the J-Link SWO interface.

CONFIGURATION
=============

   After power-up the controller get clock from internal RC oscillator that
  is unstable and may fail with J-Link auto detect. In this canse adaptive
  clocking should be used. The adaptive clock can be select from menu:
  Project->Options..., section Debugger->J-Link/J-Trace  JTAG Speed - Adaptive.

   Make sure that the following jumpers are correctly configured on the
  IAR LPC-1768-SK evaluation board:

  PWR_SEL     - depending of power source
  USBD-       - USB Device (1-2)  
  USBD+       - USB Device (1-2)  
  RST_E       - unfilled
  ISP_E       - unfilled

GETTING STARTED
===============

  1) Start the IAR Embedded Workbench for ARM.

  2) Select File->Open->Workspace...
     Open the following workspace:

     \arm\examples\NXP\LPC17xx\IAR-LPC-1768-SK\
     USBBoot\USBBoot.eww

  3) Run the program.