DFUSec Flash Programming Error

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by bigkahuna on Mon Oct 15 16:02:50 MST 2012

I am using customer board with LPC1857FET256 and trying to flash firmware into internal flash using USB0 boot.  I believe I got the USB algorithm correct because
A.  it boots from RAM correctly and displays following on UART
USB Bootloader Algorithm
Build date: Oct 15 2012:17:33:56

FLASH detected: 2 bank(2) (0xf001d830/0x1ef20000)
FLASH bank 0: Start: 1a000000, Size 00080000
FLASH bank 1: Start: 1b000000, Size 00080000
Initializing USB interface
Initializing DFU
Connecting USB

B.  LPC DFUSec says Download Complete, Waiting for device detection after initial download.

The tool chokes at this point.  What could be wrong?  What device detection is the tool waiting for?