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Old 09-29-2019, 09:47 AM   #3
DomesticExtremis
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Posts: 242
Karma: 359000
Join Date: Nov 2012
Device: default
Having obtained an FT232RL module from Ebay (https://www.ebay.co.uk/itm/FT232RL-3...53.m2749.l2649) and carefully followed the instrucions in this thread (https://www.mobileread.com/forums/sh...d.php?t=243647) I was able to obtain a trace of the messages for boot up and power down from the e-reader:

Code:
U-Boot 2009.08-dirty-svn ( 7月 16 2014 - 17:36:26)


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     : 266666666Hz

esdhc1 clock  : 80000000Hz

esdhc2 clock  : 80000000Hz

esdhc3 clock  : 80000000Hz

esdhc4 clock  : 80000000Hz

Board: MX50 RDP board

Boot Reason: [POR]

Boot Device: SD

I2C:   ready

DRAM:  512 MB

MMC:   FSL_ESDHC: 0, FSL_ESDHC: 1, FSL_ESDHC: 2

In:    serial

Out:   serial

Err:   serial

[_get_sd_number] g_sd_number:2


MMC read: dev # 2, block # 1023, count 1 partition # 0 ... 

1 blocks read: OK


MMC read: dev # 2, block # 1024, count 1 partition # 0 ... 

1 blocks read: OK

PCB ID is 41

ESDin=0,UPGKey=-1,PWRKey=0

ram p=70000000,size=536870912


MMC read: dev # 2, block # 14335, count 1 partition # 0 ... 

1 blocks read: OK


MMC read: dev # 2, block # 14336, count 13205 partition # 0 ... 

13205 blocks read: OK


MMC read: dev # 2, block # 18431, count 1 partition # 0 ... 

1 blocks read: OK

no "logo" bin header


MMC read: dev # 2, block # 45055, count 1 partition # 0 ... 

1 blocks read: OK

no "logo" bin header

Kernel RAM visiable size=505M->505M

init TPS65185 power ...

Relock PLL1 to 1GHz ...

mx50 pll1: 1000MHz

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     : 250000000Hz

esdhc1 clock  : 80000000Hz

esdhc2 clock  : 80000000Hz

esdhc3 clock  : 80000000Hz

esdhc4 clock  : 80000000Hz

Hit any key to stop autoboot:  0 


MMC read: dev # 2, block # 2047, count 1 partition # 0 ... 

1 blocks read: OK

no kernel image signature !


MMC read: dev # 2, block # 2048, count 8192 partition # 0 ... 

8192 blocks read: OK

## Booting kernel from Legacy Image at 70800000 ...

   Image Name:   r7407_#3027 Aug 13 17:39:39

   Created:      2014-08-13   9:39:41 UTC

   Image Type:   ARM Linux Kernel Image (uncompressed)

   Data Size:    1953688 Bytes =  1.9 MB

   Load Address: 70008000

   Entry Point:  70008000

   Loading Kernel Image ... OK

OK


Starting kernel ...


Uncompressing Linux... done, booting the kernel.
drivers/video/mxc/lk_tps65185.c(556):tps65185_int_func under-voltage on DCDC1 detected !

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=0!

1+0 records in
1+0 records out
512 bytes (512B) copied, 0.000217 seconds, 2.3MB/s
cannot open /dev/null
drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=1!

dosfsck 3.0.6, 04 Oct 2009, FAT32, LFN
There are differences between boot sector and its backup.
Differences: (offset:original/backup)
  489:8d/93, 490:ef/03, 491:02/81, 492:d2/03, 493:00/2a
  Not automatically fixing this.
drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=2!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=3!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=4!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=5!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=6!

/dev/mmcblk0p3: 207 files, 6669/3634233 clusters
drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=7!



(none) login: drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=8!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=9!

[PROGRESS_BAR-3009] No progess ...

epdfbdc_set_width_height(1439): new DCSize(3342336)>original DCSize(3317760) !

sh: you need to specify whom to kill
killall: fickel: no process killed
killall: udhcpc: no process killed
killall: wpa_supplicant: no process killed
killall: ntpd: no process killed
drivers/video/mxc/lk_tps65185.c(556):tps65185_int_func under-voltage on DCDC1 detected !

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=0!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=1!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=2!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=3!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=4!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=5!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=6!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=7!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=8!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=9!

drivers/video/mxc/lk_tps65185.c(556):tps65185_int_func under-voltage on DCDC1 detected !

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=0!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=1!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=2!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=3!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=4!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=5!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=6!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=7!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=8!

drivers/video/mxc/lk_tps65185.c(1352):wait power on timeout lpcnt=9!

Power down.
Which is interesting, particularly this message:

drivers/video/mxc/lk_tps65185.c(556):tps65185_int_func under-voltage on DCDC1 detected !

Note that I tried this with just battery power and with USB cable connected and got the same result, indicating that is its not a battery problem.

Clearly, the system is trying to power up the TPS65185, which is the diisplay driver, failing and then abandoning the boot process.

Last edited by DomesticExtremis; 09-29-2019 at 09:54 AM.
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