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U-Boot 2014.07 (Jul 31 2018 - 14:59:26) Allwinner Technology 

uboot commit : 6604446f7bddb8fe53f2b993100929f92a5f4d6e
 
i2c_init: by cpux
[I2C-DEBUG]:i2c_set_clock() 354 
[I2C-ERROR]:twi_send_clk_9pulse() 136 SDA is still Stuck Low, failed. 
i2c_init ok
[0.187]pmbus:   ready
axp: get node[/soc/pmu0] error
axp_probe error
[0.193]PMU: cpux 408 Mhz,AXI=408 Mhz
PLL6=600 Mhz,AHB1=200 Mhz, APB1=100Mhz 
key value = 4294967295, fel_key = [256,426]
DRAM:  64 MiB
Relocation Offset is: 03581000
axp: get node[/soc/pmu0] error
int sunxi_dma_init---
irq enable
workmode = 0,storage type = 3
[0.257]spinor:	 0
flash size =0x8000 sectors
sunxi spinor is initing...int sunxi_dma_init---
irq enable
sunxi_dma_install_int ok
sunxi_dma_install_int ok
OK
spinor id:0x1720c2
spi_freq = 40000000
[0.275]sunxi flash init ok
spinor read: start 0x3e0, sector 0x20
crc mbr copy[0] failed
spinor read: start 0x400, sector 0x20
crc mbr copy[1] failed
spinor read: start 0x420, sector 0x20
crc mbr copy[2] failed
spinor read: start 0x440, sector 0x20
crc mbr copy[3] failed
fail to find part named env
Using default environment

logo addr = 0x83f00000
can't get bootlogo partition
do not find fastboot status flag
--------fastboot partitions--------
mbr not exist
no misc partition is found
disable nand error: FDT_ERR_BADPATH
disable nand error: FDT_ERR_BADPATH
## error: update_fdt_dram_para : FDT_ERR_NOTFOUND
PowerBus = 0( 2:vBus 3:acBus other: not exist)
no battery exist
sunxi_bmp_logo_display
Hit any key to stop autoboot:  0 
Unknown command '<NULL>' - try 'help'
sunxi#
sunxi#
sunxi#ls
Unknown command 'ls' - try 'help'
sunxi#