Thanks for the reply... We got it working finally! Turns out there was some flux remaining inside the usb connector and it was messing up the communicatins on the D+ D- lines. We were finally able to upload all the demos without any issues |
Date: Sat, 2 Jan 2010 09:19:02 +0100
Subject: [Paparazzi-devel] USB-flashing dont work
if you have problems with your usb device use the serial way to flash
It works fine but with lower speed.
Same years ago same user had probes with the USB connect signal
because the USB voltage was 8V and not 5V.
This level destroyed the pin of the lpc2148.
Mohammed Abukhalid schrieb:
We've been working on putting together a BOOZ prototype as part of a
university project and I was hoping to get your input on a problem we
are currently trying to debug. We got the Booz PCB boards and installed
all the necessary components as of a couple days ago. Everything looked
like its in working order and we were able to successfully compile the
USB bootloader and transfer it to the microcontroller from a linux box
At this point we are simply trying to upload the led test program, but
we cant get that far because for some reason when we connect to the USB
connector on the board the PC does not detect the board. We have
verified the connections and everything seems to be in order. Another
question that comes to mind is the USB Select PIN is, as I understand
active low, but it remains at 3.3 V even after we connect the usb
Any recommendations as to the best way to figure this out would be
appreciated. So far we double checked that the pins connecting to the
booz board (power and ground) are working properly, that 3.3 V is being
sent to the USB VBus pin and the USB Select pin is always at 3.3 V
Thank you for your help,
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