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Old 07-29-2023, 12:50 AM   #1
tuer
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Posts: 4
Karma: 10
Join Date: Jul 2023
Device: sony prs t1
Smile The most painful thing in the world is that the machine fails and there is no way to

Last month I found a sony prs t1 from the second-hand market. After changing the battery and using the SD card to save the brick, it was able to turn it on, but I found that the original battery was completely dead, so I bought another 3mm thick battery (missing the temperature detection cable.) So I found that it can only discharge, not charge. When I was sad, I found that as long as I pulled out the white cable and pinched it with my finger, the red light for charging would light up and charge it. Although it was hard work, it was interesting, especially since the original battery cost more than $14, which was far more than the price I bought it for.
After that, I found out how to read Chinese from the evening, because the Chinese novels I imported, it shows all ❓. Use calibre to enter the font code in the attached css, and then create a FONT folder in the reader root directory, put the font in nine and you can read it.
However, the good times don't last long, it always displays various wrong pop-ups, so I want root again, so I can install software freely. After using the root package of porkupan, a new desktop appeared in front of me, but it was too slow, so I wanted to go back to the original system. At this time, I swiped the wrong restore-set.zip, so now I am stuck in the boot interface. The opening book is a white progress bar, the power yellow light keeps flashing, and the light of the sd card does not respond. Press and hold home + memu to enter recovery. After about ten seconds, it will keep restarting in a loop. I am very sad.
Finally, I found the jpa method in in-app, bought usb to ttl, welded it, and used putty to link it, but I don't know what to do next. Although I installed ubantu, I don't know how to use these commands. In putty, it keeps restarting in a loop.
Later, I wanted to find a similar ttl method to save bricks, such as kindle, but I found that one of the key commands is bootm + an address, but I don't know if prs t1 can use this method to enter recovery, so it should be able to save bricks.
I looked at the method above the wiki, and there seems to be no effective method. The things on Sony's official website, as well as many links and methods, are a long time ago, and they have long since expired. Or they all refer to each other. If anyone can tell me the method, I would be very grateful.
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Old 07-29-2023, 12:59 AM   #2
tuer
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Device: sony prs t1
This is what appears after I connect to putty.
MMC read: dev # 2, block # 12288, count 5120 partition # 0 ...
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz

U-Boot 2009.08 (Nov 14 2011 - 11:16:48)
CPU: Freescale i.MX50 family 1.1V at 800 MHz
mx50 pll1: 800MHz
mx50 pll2: 400MHz
mx50 pll3: 216MHz
ipg clock : 66666666Hz
ipg per clock : 66666666Hz
uart clock : 24000000Hz
ahb clock : 133333333Hz
axi_a clock : 400000000Hz
axi_b clock : 200000000Hz
weim_clock : 100000000Hz
ddr clock : 160000000Hz
esdhc1 clock : 80000000Hz
esdhc2 clock : 80000000Hz
esdhc3 clock : 80000000Hz
esdhc4 clock : 80000000Hz
Board: MX50 ARM2 board
Boot Reason: [POR]
Boot Device: MMC
I2C: ready
DRAM: 256 MB
MMC: FSL_ESDHC: 0, FSL_ESDHC: 1, FSL_ESDHC: 2
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz
temperature 29
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz
In: serial
Out: serial
Err: serial
Net: got MAC address from IIM: 00:00:00:00:00:00
FEC0
Hit any key to stop autoboot: 0

MMC read: dev # 2, block # 12288, count 5120 partition # 0 ...
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x1
imx_esdhc.c bus_width 0x4
imx_esdhc.c bus_width 0x4
MMC set clock 50MHz

autoscr - DEPRECATED - use "source" command instead
base - print or set address offset
bdinfo - print Board Info structure
boot - boot default, i.e., run 'bootcmd'
bootd - boot default, i.e., run 'bootcmd'
bootm - boot application image from memory
bootp - boot image via network using BOOTP/TFTP protocol
cls - clear screen
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
dhcp - boot image via network using DHCP/TFTP protocol
echo - echo args to console
erase - erase FLASH memory
ext2load- load binary file from a Ext2 filesystem
ext2ls - list files in a directory (default /)
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls - list files in a directory (default /)
flinfo - print FLASH memory information
go - start application at address 'addr'
help - print online help
i2c - I2C sub-system
iminfo - print header information for application image
imxtract- extract a part of a multi-image
itest - return true/false on integer compare
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loady - load binary file over serial line (ymodem mode)
loop - infinite loop on address range
md - memory display
mii - MII utility commands
mm - memory modify (auto-incrementing address)
mmc - MMC sub system
mmcinfo - mmcinfo <dev num>-- display MMC info
mtest - simple RAM read/write test
mw - memory write (fill)
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
protect - enable or disable FLASH write protection
rarpboot- boot image via network using RARP/TFTP protocol
reset - Perform RESET of the CPU
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv - set environment variables
sf - SPI flash sub-system
sleep - delay execution for some time
source - run script from memory
sspi - SPI utility commands
tftpboot- boot image via network using TFTP protocol
version - print monitor version

Below is a picture of me using the use to ttl module - ch340g.
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Old 07-29-2023, 08:10 AM   #3
Quoth
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Posts: 11,736
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Location: Ireland
Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper11
The PRS-T1 is buggy. I got a refund. Later I got a PRS-T2 which is a far better model, though of course the WiFi and Webbrowser is pointless because no valid certs/
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