[dfu] Device Firmware Upgrade issue

Hi ,

I want process DFU for u-boot  and follow  below link.

http://processors.wiki.ti.com/index.php/DRA7xx_GLSDK_Software_Developers_Guide#DFU_Usage_from_u-boot

After " setenv dfu_alt_info ${dfu_alt_info_emmc}"    and   "dfu 0 mmc 1"   commands,  u-boot can not pop  "set_config: high speed config #1: usb_dnload" string. And hence "dfu-util -l" can not find any device to flash image.

     Please help on this , thanks.

Best,
Andy

Below is my uboot environment variable.

print
arch=arm
baudrate=115200
board=dra7xx
board_name=dra7xx
bootcmd=switch_dtb;run mmcboot;setenv mmcdev 1; setenv bootpart 1:2; setenv mmcroot /dev/mmcblk0p2 rw; run mmcboot;
bootdelay=1
bootdir=/boot
bootenv=uEnv.txt
bootfile=zImage
bootm_size=0x10000000
bootpart=0:2
bootscript=echo Running bootscript from mmc${mmcdev} ...; source ${loadaddr}
console=ttyO2,115200n8
cpu=armv7
dfu_alt_info=rawemmc raw 0 3751936;boot part 1 1;rootfs part 1 2;MLO fat 1 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x200 0x400;spl-os-args.raw raw 0x80 0x80;spl-os-image.raw raw 0x900 0x2000;spl-os-args fat 1 1;spl-os-image fat 1 1;u-boot.img fat 1 1;uEnv.txt fat 1 1
dfu_alt_info_emmc=rawemmc raw 0 3751936;boot part 1 1;rootfs part 1 2;MLO fat 1 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x200 0x400;spl-os-args.raw raw 0x80 0x80;spl-os-image.raw raw 0x900 0x2000;spl-os-args fat 1 1;spl-os-image fat 1 1;u-boot.img fat 1 1;uEnv.txt fat 1 1
dfu_alt_info_mmc=boot part 0 1;rootfs part 0 2;MLO fat 0 1;MLO.raw raw 0x100 0x100;u-boot.img.raw raw 0x200 0x400;spl-os-args.raw raw 0x80 0x80;spl-os-image.raw raw 0x900 0x2000;spl-os-args fat 0 1;spl-os-image fat 0 1;u-boot.img fat 0 1;uEnv.txt fat 0 1
dfu_alt_info_ram=kernel ram 0x80200000 0x4000000;fdt ram 0x80f80000 0x80000;ramdisk ram 0x81000000 0x4000000
dfu_bufsiz=0x10000
eth1addr=d0:b5:c2:51:25:c7
ethact=cpsw
ethaddr=7c:ec:79:9c:14:5a
fdt_addr_r=0x88000000
fdtaddr=0x88000000
fdtfile=undefined
findfdt=if test $board_name = omap5_uevm; then setenv fdtfile omap5-uevm.dtb; fi; if test $board_name = dra7xx; then setenv fdtfile dra7-evm-lcd10.dtb; fi;if test $board_name = dra72x; then setenv fdtfile dra72-evm-lcd10.dtb; fi;if test $board_name = beagle_x15; then setenv fdtfile am57xx-beagle-x15.dtb; fi;if test $fdtfile = undefined; then echo WARNING: Could not determine device tree to use; fi;
importbootenv=echo Importing environment from mmc${mmcdev} ...; env import -t ${loadaddr} ${filesize}
ipaddr=192.168.1.1
kernel_addr_r=0x82000000
loadaddr=0x82000000
loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenv}
loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr
loadfdt=load mmc ${bootpart} ${fdtaddr} ${bootdir}/${fdtfile};
loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}
mmcargs=setenv bootargs console=${console} ${optargs} vram=${vram} root=${mmcroot} rootfstype=${mmcrootfstype}
mmcboot=mmc dev ${mmcdev}; if mmc rescan; then echo SD/MMC found on device ${mmcdev};if run loadbootenv; then echo Loaded environment from ${bootenv};run importbootenv;fi;if test -n $uenvcmd; then echo Running uenvcmd ...;run uenvcmd;fi;if run loadimage; then run loadfdt; echo Booting from mmc${mmcdev} ...; run mmcargs; bootz ${loadaddr} - ${fdtaddr}; fi;fi;
mmcdev=0
mmcroot=/dev/mmcblk0p2 rw
mmcrootfstype=ext4 rootwait
netargs=setenv bootargs console=${console} ${optargs} root=/dev/nfs nfsroot=${serverip}:${rootpath},${nfsopts} rw ip=dhcp
netboot=echo Booting from network ...; set env autoload no; dhcp; tftp ${loadaddr} ${bootfile}; tftp ${fdtaddr} ${fdtfile}; run netargs; bootz ${loadaddr} - ${fdtaddr}
netmask=255.255.255.0
partitions=uuid_disk=${uuid_gpt_disk};name=rootfs,start=2MiB,size=-,uuid=${uuid_gpt_rootfs}
ramdisk_addr_r=0x88080000
rdaddr=0x88080000
scsidevs=0
serial#=2e6408f02b3a00a2
serverip=192.168.1.100
soc=omap5
stderr=serial
stdin=serial
stdout=serial
usbtty=cdc_acm
vendor=ti
ver=U-Boot 2014.07 (Sep 02 2016 - 11:49:41)
vram=16M

Environment size: 3531/131067 bytes
U-Boot#