http://forums.leaflabs.com/topic.php?id=1555 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:27:43 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1555#post-10208 Sat, 14 Apr 2012 19:12:40 +0000 formica 10208@http://forums.leaflabs.com/ <p>Hi all,<br /> I built a board with an STM32F103RBT6, some i2c sensor and an USB connection.<br /> I flashed the maple-bootloader (compiled from git) using the JTAG interface.<br /> The behavior of my board is a little strange.</p> <p>1) dfu-util shows the name of the two usb dfu "channels" (RAM/FLASH) only for few second after attaching the board to the USB plug. During this phase is it possible to download a binary, but it doesn't seems to work (I'm using a generic binary from libopencm3 project). After this short phase, using 'dfu-util -l' the name of the connections disappear and is showed "UNDEFINED", and the board becomes unprogrammable.<br /> This is the output of dfu-util, when I try to download something on the flash:</p> <p>Run-time device DFU version 0001<br /> Found DFU: [1eaf:0003] devnum=0, cfg=1, intf=0, alt=1, name="UNDEFINED"<br /> Claiming USB DFU Interface...<br /> Setting Alternate Setting #1 ...<br /> Cannot set alternate interface</p> <p>2) When I put the board in perpetual bootloader mode the dfu-util shows UNDEFINED for the two channels and I can't downloady anything.</p> <p>Any ideas?</p> <p>Thanks in advance<br /> formica </p>