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m8b_m201_1G#printenv
1080ioutputheight=1043
1080ioutputwidth=1853
1080ioutputx=30
1080ioutputy=18
1080poutputheight=1044
1080poutputwidth=1860
1080poutputx=30
1080poutputy=18
480ioutputheight=464
480ioutputwidth=700
480ioutputx=10
480ioutputy=8
480poutputheight=464
480poutputwidth=700
480poutputx=10
480poutputy=8
4k2k30hz_height=2159
4k2k30hz_width=3839
4k2k30hz_x=0
4k2k30hz_y=0
576ioutputheight=547
576ioutputwidth=685
576ioutputx=17
576ioutputy=14
576poutputheight=547
576poutputwidth=685
576poutputx=17
576poutputy=14
720poutputheight=685
720poutputwidth=1217
720poutputx=31
720poutputy=17
baudrate=115200
bootargs=init=/init console=ttyS0,115200n8 no_console_suspend storage=2 vdaccfg=0xa000 logo=osd1,loaded,0x7900000,576cvbs,full hdmimode=1080p cvbsmode=576cvbs androidboot.firstboot=0 hdmitx=
bootcmd=run storeboot
bootdelay=1
bootfile=boot.img
bootm_low=0x00000000
bootm_size=0x80000000
bootpath=u-boot.bin
bootsize=100000
bootstart=0
bootup_offset=0x13000280
bootup_size=0x1c2046
chipname=8726m8
console=ttyS0,115200n8
cvbsmode=576cvbs
digitaudiooutput=PCM
display_bpp=16
display_color_bg=0
display_color_fg=0xffff
display_color_format_index=16
display_height=576
display_layer=osd2
display_width=720
ethact=Meson_Ethernet
ethaddr=00:15:18:01:81:31
fb_addr=0x7900000
fb_height=720
fb_width=1280
firstboot=0
gatewayip=10.18.9.1
get_dt=checkhw
hdmimode=1080p
hostname=arm_m8
initargs=init=/init console=ttyS0,115200n8 no_console_suspend storage=2
initrd_high=60000000
ipaddr=10.18.9.97
loadaddr=0x12000000
loadaddr_logo=0x13000000
mmcargs=setenv bootargs console=${console} boardname=m8_board
netmask=255.255.255.0
normalsize=400000
normalstart=1000000
outputmode=576cvbs
p0path=uImage
p0size=400000
p0start=1000000
p1path=android.rootfs
p1size=8000000
p1start=1400000
partnum=2
preboot=if itest ${upgrade_step} == 3; then run prepare; run storeargs; run update; fi; if itest ${upgrade_step} == 1; then defenv; setenv upgrade_step 2; saveenv;fi; run prepare;run storeargs;get_rebootmode; clear_rebootmode; echo reboot_mode=${reboot_mode};run update_ir; run update_key; run switch_bootmode
preloaddtb=imgread dtb boot ${loadaddr}
prepare=logo size ${outputmode}; video open; video clear; video dev open ${outputmode};imgread pic logo bootup ${loadaddr_logo}; bmp display ${bootup_offset}; bmp scale;
reboot_mode=charging
recovery=echo enter recovery;if mmcinfo; then if fatload mmc 0 ${loadaddr} recovery.img; then bootm;fi;fi; if usb start 0; then if fatload usb 0 ${loadaddr} recovery.img; then bootm; fi;fi;if imgread kernel recovery ${loadaddr}; then bootm; else echo no recovery in flash; fi;
sdc_burning=sdc_burn ${sdcburncfg}
sdcburncfg=aml_sdc_burn.ini
serverip=10.18.9.113
stderr=serial
stdin=serial
stdout=serial
store=2
storeargs=setenv bootargs ${initargs} vdaccfg=${vdac_config} logo=osd1,loaded,${fb_addr},${outputmode},full hdmimode=${hdmimode} cvbsmode=${cvbsmode} androidboot.firstboot=${firstboot} hdmitx=${cecconfig}
storeboot=echo Booting...; if unifykey get usid; then setenv bootargs ${bootargs} androidboot.serialno=${usid};fi;imgread kernel boot ${loadaddr};bootm;run recovery
switch_bootmode=if test ${reboot_mode} = factory_reset; then run recovery;else if test ${reboot_mode} = update; then run update;else if test ${reboot_mode} = usb_burning; then run usb_burning;else if test ${wipe_data} = failed; then echo wipe_data=${wipe_data}; run recovery;else fi;fi;fi;fi
testaddr=0x12400000
update=run usb_burning; if mmcinfo; then if fatexist mmc 0 ${sdcburncfg}; then run sdc_burning; else if fatload mmc 0 ${loadaddr} aml_autoscript; then autoscr ${loadaddr}; fi;run recovery;fi;else run recovery;fi;
update_ir=if irdetect; then run update; fi
update_key=saradc open 0; if saradc get_in_range 0 0x50; then msleep 50; if saradc get_in_range 0 0x50; then echo update by key...; run update; fi;fi
upgrade_step=2
usb_burning=update 1000
vdac_config=0xa000
video_dev=tvout
wipe_data=success
请您看看 这个如何 改成 U盘启动
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