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uboot can't load Udisk file

Question asked by AL ee on Dec 29, 2018
Latest reply on Jan 9, 2019 by AL ee

hi 

when I used the cmd "fatload usb 0 0x30000000 a_4M.txt " download the file "a_4M.txt" this file size is 4MB okey then I download the "a_4M.txt" the file size is 15MB,is error!!!

the detail :

=> usb start
starting USB...
USB0: 
Port not available.
USB1: 
USB EHCI 1.00
scanning bus 1 for devices... 3 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found
scanning usb for ethernet devices... 0 Ethernet Device(s) found
=> fatload usb 0 0x12000000 a_4M.txt
reading a_4M.txt
4913914 bytes read in 4353 ms (1.1 MiB/s)
=> fatload usb 0 0x12000000 a_15M.txt
reading a_15M.txt
EHCI timed out on TD - token=0x40008d80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x1f8c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x1f8c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x1f8c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x1f8c80
EHCI timed out on TD - token=0x80008d80
EHCI timed out on TD - token=0x1f8c80
EHCI timed out on TD - token=0x80008d80
Error reading cluster
** Unable to read file a_15M.txt **

then I find if I download the file size biger then 6MB,this error will happen.our uboot version is 2015-04 the chip is imx6D7c ,yes I also test and verify the NXP Development board ,is same problem.

I want update the system in uboot stage use the Udisk,so how to solve this problem 
have a good day!!!!

thx

Alee

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