(Resolved) S912 U9-H: How to stop a failing loop boot on emmc

[Sadar]

Hello everybody,

 

I need help because I screwed up when trying to install the system on emmc. The emmc is formatted and does not allow to initialize a boot sequence😢

A connection on JDEBUG1 shows that the box loops on this initialization sequence again and again.

GXM:BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:0;READ:0;0.0;CHK:0;
TE: 136356

BL2 Built : 14:17:47, Apr 18 2017.
gxl g95dc662 - xiaobo.gu@droid05

set vdd cpu_a to 1120 mv
set vdd cpu_b to 1050 mv
set vddee to 1000 mv
Board ID = 1
CPU clk: 1200MHz
DQS-corr enabled
DDR scramble enabled
DDR3 chl: Rank0+1 @ 912MHz - PASS
Rank0: 1024MB(auto)-2T-13
Rank1: 1024MB(auto)-2T-13
DataBus test pass!
AddrBus test pass!
-s
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x00004000
New fip structure!
Load bl30 from eMMC, src: 0x00010200, des: 0x01100000, size: 0x0000d600
Load bl31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00015400
Load bl32 from eMMC, src: 0x00038200, des: 0x05300000, size: 0x0002ee00
Load bl33 from eMMC, src: 0x00068200, des: 0x01000000, size: 0x000ad000
aml log : SIG CHK : 300 for address 0x01000000
reset...

 

Of course I tried to keep pressing the reset button for more than 10 seconds during startup by putting an sd card or a USB stick with armbian, corelec or libreelec, I also tried to have the box detected by the usb burning tools connected to OTG, but nothing works because the box loops on the emmc boot

 

On this box there are the groups of connectors : JDEBUG1 ICE1 and JUART1

 

ICE1 has RESET, DAT, CLCK, GND connector pins. Anyone know how to use it?

 

Does anyone know how to stop this loop on boot emmc?

 

Is there a solution with the connectors to connect to the console and load a localized u-boot on the SD card or on the USB Stick?

 

 

 

 

Edited May 11, 2023 by Sadar
Mark resolved + attach images

[Sadar]

Ohhh Yeahhhhhhh 😀🤪

I found a solution

I had read some post https://theminixforum.com/index.php?threads/minix-u1-bricked.3855/ and https://theminixforum.com/index.php?threads/emmc-reset-pads.4430 / which showed how to put a paper clip or a screwdriver on the motherboard to make a short circuit (...)
Ok, as my U9-H was not working I tried various short circuit until the boot loop froze to show
 

Quote

GXM:Fixed PLL lock failed
BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:400;NAND:81;SD:0;READ:0;CHK:AA;USB:8;0.0;

 

Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x00004000
New fip structure!
Load bl30 from eMMC, src: 0x00010200, des: 0x01100000, size: 0x0000d600
Load bl31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00015400
Load bl32 from eMMC, src: 0x00038200, des: 0x05300000, size: 0x0002ee00
Load bl33 from eMMC, src: 0x00068200, des: 0x01000000, size: 0x000ad000
aml log : SIG CHK : 300 for address 0x01000000
reset...
GXM:BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:0;READ:0;0.0;CHK:0;
TE: 132890

BL2 Built : 14:17:47, Apr 18 2017.
gxl g95dc662 - xiaobo.gu@droid05

set vdd cpu_a to 1120 mv
set vdd cpu_b to 1050 mv
set vddee to 1000 mv
Board ID = 1
CPU clk: 1200MHz
DQS-corr enabled
DDR scramble enabled
DDR3 chl: Rank0+1 @ 912MHz - PASS
Rank0: 1024MB(auto)-2T-13
Rank1: 1024MB(auto)-2T-13
DataBus test pass!
AddrBus test pass!
-s
Load fip header from eMMC, src: 0x0000c200, des: 0x01400000, size: 0x00004000
New fip structure!
Load bl30 from eMMC, src: 0x00010200, des: 0x01100000, size: 0x0000d600
Load bl31 from eMMC, src: 0x00020200, des: 0x10100000, size: 0x00015400
Load bl32 from eMMC, src: 0x00038200, des: 0x05300000, size: 0x0002ee00
Load bl33 from eMMC, src: 0x00068200, des: 0x01000000, size: 0x000ad000
GXM:Fixed PLL lock failed
BL1:dc8b51:76f1a5;FEAT:ADFD718C:0;POC:3;RCY:0;EMMC:400;NAND:81;SD:0;READ:0;CHK:AA;USB:8;0.0;
TE: 16561778

 

 

I used usb_burning_tools provided here http://theminixforum.com:9009/firmwares/U9-H-CE_FW001-Android_7.1.2-20191120-Burning_Tool.zip and flashed my U9-H

For the U9-H, I made a short circuit on R32 (see post with pictures)

 

Edited May 11, 2023 by Sadar
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