dfu-util  --device 0483:df11 --alt 0 \
	--dfuse-address 0x08000000 \
        -v -v -v \
	--download arm/iotoggle.bin
No valid DFU suffix signature
Warning: File has no DFU suffix
dfu-util 0.5

(C) 2005-2008 by Weston Schmidt, Harald Welte and OpenMoko Inc.
(C) 2010-2011 Tormod Volden (DfuSe support)
This program is Free Software and has ABSOLUTELY NO WARRANTY

dfu-util does currently only support DFU version 1.0

Filter on vendor = 0x0483 product = 0xdf11
Opening DFU capable USB device... ID 0483:df11
Run-time device DFU version 011a
Found DFU: [0483:df11] devnum=0, cfg=1, intf=0, alt=0, name="@Internal Flash  /0x08000000/04*016Kg,01*064Kg,07*128Kg"
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 10
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 011a
Device returned transfer size 2048
DfuSe interface name: "Internal Flash  "
Memory segment at 0x08000000   4 x 16384 = 65536 (rew)
Memory segment at 0x08010000   1 x 65536 = 65536 (rew)
Memory segment at 0x08020000   7 x 131072 = 917504 (rew)
Uploading to address = 0x08000000, size = 2308
Erasing page size 16384 at address 0x08000000, page starting at 0x08000000
 Download from image offset 00000000 to memory 08000000-080007ff, size 2048
  Setting address pointer to 0x08000000
 Download from image offset 00000800 to memory 08000800-08000903, size 260
  Setting address pointer to 0x08000800