LPC3131/41 Developer’s Kit - User’s Guide
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Copyright 2012 © Embedded Artists AB
4.
Click the reset button on the base board to restart the board and load the application from
NOR flash.
Figure 18 – Terminal Output for SPI Boot
Note that the SPI boot image must be 128kByte, or less, for LPC3131/41.
5.3.5
Booting via USB DFU class
When booting via USB, a special (PC) program must be used to connect to the DFU device that the
boot code implements in the LPC3131/41. Follow the list below to download a boot image.
1.
Connect a USB cable (mini-B to A) from your computer to the LPC31xx Base Board. Note
that it is the LPC3131/41 USB connection that should be connected to, not the UART-to-serial
bridge on the
LPC31xx Base Board
. See Figure 20 for an illustration where the correct USB
connector can be found.
2.
Install DFU drivers (available on the Embedded Artists support site).
3.
Start the DFU application (DFUAPP.exe). The connected LPC3131/41 can be seen in the list
of devices.
4.
Select a file to download (named *_usb.rom in the pre-compiled applications available on the
Embedded Artists support site).
5.
Warning about the file not containing a suffix can sometimes be generated. Just ignore such
messages and click ‘Yes’ to continue.
6.
Select Start Download.
Step1: UART boot
of ‘SPI NOR flash
program’
Step 2:
Download of the
actual boot image
