serial connection question

[retroboy32]

Okay... long story... but basically
My WDTV Live is bricked, so I am trying the serial connection.

I have read and followed the instructions posted on the wiki regarding pinouts and using putty to connect via a serial connection.

I got a console screen, but I can't read the contents.

I have set the settings acording to the wiki:
Using COM1
Speed: 115200, Data: 8, Parity: None, Stop 1, Flow Control: None

Here is the output:

Code: Select all

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Any ideas greatly appreciated...
I'm stuck

[recliq]

This looks like wrong speed settings...

Check speed settings on the Com port as well as in putty.

You are using a 3.3V TTL Serial adaptor, right?

[retroboy32]

Recliq,

No... I am using a serial cable out of my COM port... Basically a stripped Cisco Console Cable (DB9 to RJ45 with RJ45 end stripped).
I have the pinouts for the cable.

The wiki says that the +5V pin (or 3.3V pin) should not be connected...
I'm using a CDROM audio cable as my board interface.

I have connected the TX, RX, and GND only (according to the wiki post), using the DB9 serial cable with the CDROM audio cable end...

I know the RX and TX wires are correct becasue if I bridge them, I get "readble" text back in my console window in Putty when I type on the keyboard.

[recliq]

You should read the wiki more carefully, you need a 3.3V TTL serial interface not a normal 5V one.
Maybe you just toasted the serial chip on WDTV, maybe you're lucky....

By any means don't further try to connect to your computer serial port!

Will add warning to the wiki that you should never connect to your PC serial port tough...seems it can't be stressed enough.

[retroboy32]

Recliq,

Thanks for the information... and for updating the wiki page... it wasn't extremely clear in the wiki (IMHO)...

You may also want to remove the statement but you can use whatever cable you want/have. or maybe just change it to say, but you can use any 3.3V TTL-Serial cable you want/have.

Although, I'm not sure I understand why a console cable won't work... You don't connect the power cable regardless of the cable you use (3.3V or 5V). I only connected the TX, RX, and GRND (as indicated in the wiki)...

[RMerlin]

Recliq,

Thanks for the information... and for updating the wiki page... it wasn't extremely clear in the wiki (IMHO)...

You may also want to remove the statement but you can use whatever cable you want/have. or maybe just change it to say, but you can use any 3.3V TTL-Serial cable you want/have.

Although, I'm not sure I understand why a console cable won't work... You don't connect the power cable regardless of the cable you use (3.3V or 5V). I only connected the TX, RX, and GRND (as indicated in the wiki)...

That refers to the voltage used by the levels, not to power supply. A "real" (read: RS-232) serial port as on the PC uses up to -12V to +12V to denote 0 (low state) and 1 (high state). A tad more... "potent". So it might have trouble reading data using only -3.3V to 3.3V. And it's talking a bit louder than your WDTV is expecting.

Also, TTL denotes 0/3V, if I'm not mistaken, as opposed to real RS_232 going in the negative to denote a low state.

[PaulF]

I am interested in this thread because I ordered a Nokia CA-42 from EBay a couple of days ago and expect to be going through similar problems in a few days.

TTL = 0 to 5V; LVTTL = 0 to 3.3V(LV low voltage). RS232 com port -12 to +12. The switching point Vt is somewhere in between the the high and low. It looks like the com port is switching, but is the wrong speed. Try 9600 like another thread suggested.

[PaulF]

I got my CA-40 today and soldered it up it to a CD audio cable like the wiki. It works great with the Hyper Terminal that comes with winXP. 115200 speed worked. I remembered what the problem with the com port is. RS232 -12 is a one so when connected to ttl the one and zero are swapped. The stop bit becomes a start bit so the data streams at the right rate, but garbage. I worked on mainframe comm equipment for a couple of years, but it was 40+ years ago. When we hacked into ttl we simply made an inverter out of pnp transistor. Yes, you could see the transistors in the comm equipment back then.

[retroboy32]

Thanks again for all of your help...
So... bottom line... I have to get a 3.3V TTL serial cable...
Will do...

[retroboy32]

finally received my CA-42 cable in the mail today... man, things take awhile to travel to Canada from china...
Anyway... hooked up the serial port and here is the output:

Code: Select all

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2012.04.05 18:35:39 =~=~=~=~=~=~=~=~=~=~=~=

#xos2P4a-99 (sfla 128kbytes. subid 0xac/ac) [serial#e73b345386f84f5044e910f89217245d]
#stepxmb 0xac
#DRAM setup (method=0x10015858) ...
#DRAM0 Window  :    0x#28#29#28#28# (20)
#DRAM1 Window  :    0x#2a#2a#2a#28# (20)
#DRAM0 Settings: WD=0x0c0c0c0b RG=0x0a0a0909 RR=0x0a0a0909 RF=0x090a0a09
#DRAM1 Settings: WD=0x0c0c0c0b RG=0x0a0a0a09 RR=0x0a0a0a09 RF=0x0a0a0a0a
#poisoned 131072 pages with 0x331deda8
#step6 @0x*** zxenv has been customized compared to build ***
--- review xmasboot/configs/922-A2.config for details [xmbb7-ezboot98-nand_st2] ---
xloadsize=59444
xload rc=6
subrom SHA-256: 43b5383fcd2ecd1f5366bea4eafc03bd740dc0a113af58d02846c117fb581b5b
ezboot98 @0xd00e5a94 (nand_st2) (actual cpu=@499MHz/dsp=333MHz/sys=333MHz)
on 8655 rev ES5 (subid 0xac) a2=0x00000002 a3=0x00000003
step12
#step22
ruamm0 [0x80000000,0x8f2f0000[ (~254738432 bytes)
ruamm1 [0xcca00000,0xcfd60000[ (~53870592 bytes)
[0xcfd20000,xos_public_ga=0xcfd20000[ and [0xcfd40000,0xcfd5ffff[ are lost for alignment)
channel_#ei
_ga=0xcfd1fcd4
[0x8e800000,ios_ga=0x8e800000[ and [0x8eeacfc1,0x8f2f0000[ are lost for alignment)
GW32 0x0006f008 0xc0000000 [va=0x84000000]
GW32 0x0006f00c 0xc4000000 [va=0x88000000]
GW32 0x0006f010 0xc8000000 [va=0x8c000000]
step33
xos2k client version=19, server version=19
xos2 SHA-1 = ef2f712148b75194ab1d3c691b55bd4d3a5e956d (version 0x4a)
xos2 serial = e73b345386f84f5044e910f89217245d
Using zbootxenv ga=0xcfd0bcbc (va=0xbbd0bcbc)

**************************************
* SMP86xx zboot start ...
* Version: 3.1.0
* Started at 0xd00ed770.
* Configurations (chip revision: 1):
*    Enabled checkpoints.
**************************************
DRAM0 dunit_cfg/delay0_ctrl (0x3514001a/0x4565132b).
DRAM1 dunit_cfg/delay0_ctrl (0x3514001a/0x4565132b).
Using UART port 0 as console.
Board ID.: villa_d2
Setting up H/W from XENV block at 0xbbd0bcbc.
  Setting <SYSCLK avclk_mux> to 0x17400000.
  Setting <SYSCLK hostclk_mux> to 0x00000130.
  Setting <IRQ rise edge trigger lo> to 0xff28ca00.
  Setting <IRQ fall edge trigger lo> to 0x0000c000.
  Setting <IRQ rise edge trigger hi> to 0x0c10009f.
  Setting <IRQ fall edge trigger hi> to 0x00000000.
  Setting <IRQ GPIO map> to 0x000a0800.
  Setting <PB default timing> to 0x03080202.
  Keeping <PB timing0> to 0x03080202.
  Keeping <PB Use timing0> to 0x000003f3.
  Keeping <PB CS Config> to 0x00330003.
  Enabled Devices: 0x001b3efc
    PCIHost Ethernet Ethernet1 IR FIP I2CM I2CS USB PCIDev1 PCIDev2 PCIDev3 PCIDev4 SATA SCARD SCARD1
  PCI IRQ routing:
    IDSEL 1: INTA(#14) INTB(#14) INTC(#14) INTD(#14)
    IDSEL 2: INTA(#14) INTB(#14) INTC(#14) INTD(#14)
    IDSEL 3: INTA(#14) INTB(#14) INTC(#14) INTD(#14)
    IDSEL 4: INTA(#14) INTB(#14) INTC(#14) INTD(#14)
  Smartcard pin assignments:
    OFF pin = 2
    5V pin = 0
    CMD pin = 1
  Smartcard1 pin assignments:
    OFF pin = 2
    5V pin = 0
    CMD pin = 1
cd#0 disabled
cd#1 disabled
cd#2 want 96000000Hz: setting of 0x0000000021c00000-2^28
cd#2 cannot measure
cd#3 disabled
cd#4 want 33333333Hz: setting of 0x0000000061333343-2^28
cd#4 measured to 33340kHz
cd#5 disabled
cd#6 disabled
cd#7 disabled
cd#8 disabled
cd#9 disabled
cd#10 disabled
cd#11 disabled
  GPIO dir/data = 0x00000880/0x00000880
  UART0 GPIO mode/dir/data = 0x6e/0x00/0x00
  UART1 GPIO mode/dir/data = 0x6e/0x04/0x04
  UART2 GPIO mode/dir/data = 0x00/0x00/0x00
  Generate pulse(s) with GPIO7 .. 1,0(16us),1
  MAC0: 00:90:a9:92:4e:8e
  MAC1: 00:16:e8:e9:10:f8
XENV block processing completed.
Default boot index: 2, sel:2
xmboot booted from devtype: 0, chipsel: 0, phyblocknum: 0
Explicit boot order specified:
  0x00 : devtype=0, CS=0
  0x01 : devtype=0, CS=1
  0x20 : devtype=2, CS=0
  0x21 : devtype=2, CS=1
WARNING: ezboot encroaches upon ruamm#0 zone
ezboot buffers, setup in DRAM bank#0:
  Alloting 1048576 bytes for heap.
  Alloting 8388608 bytes for reading.
  Alloting 8388608 bytes for decryption.
xmat romfs goes to 0xcfc0bca0 (ga)
xmat romfs goes to 0xb3c0bca0 (va)
Trying devtype=0 chipsel=0
nand_probe 0x0xd00f6ed0
nand_Mg_open 0
Reading NAND CS0, addr 0x016c0000, ize 0x00000800 to 0xb3c0bca0
Reading NAND CS0, addr 0x016c0800, size 0x00021400 to 0xb3c0c4a0
File xtask_loader.xload found
Trying devtype=0 chipsel=0
Reading NAND CS0, addr 0x078bf800, size 0x00000800 to 0xd011f3bc
sign_addr=0ax078bfffc *sign=66, *sign=77, *sign=75, *sign=70757766
firmware OK.
found imat romfs @ 0x006c0000
imap romfs goes to 0xcec0bc90 (ga)
imap romfs goes to 0xb2c0bc90 (va)
Trying devtype=0 chipsel=0
Reading NAND CS0, addr 0x006c0000, size 0x00000800 to 0xb2c0bc90
Reading NAND CS0, addr 0x006c0800, size 0x00141000 to 0xb2c0c490
File itask_loader.iload found
Channel pending 1612
Channel pending 954344
Channel pending 2001502
Channel pending 3092272
Channel pending 4183010
Channel pending 5273804
Channel pending 6364564
Channel pending 7455302
Channel pending 8546048
Channel pending 9636830
Trying devtype=0 chipsel=0
reading z.boot2 (vzx=0xbbd0bcbc) is 0x003c0000
Reading NAND CS0, addr 0x003c0000, size 0x00000800 to 0x01740000
Reading NAND CS0, addr 0x003c0800, size 0x002a7000 to 0x01740800
Found.
ROMFS found at 0x0x01740000, Volume name = MIPSLINUX_LOAD
Found 1 file(s) to be processed in ROMFS.
Processing vmlinux_xload.zbf (start: 0x01740090, size: 0x002a7424)
  Checking zboot fil
sCignature .. OK.
  Warning: header version mismatched.
   *** Fully Encrypted.
src_addr = 0x017400b0, dest addr = 0x01f40000
XLOADING src=0x817400b0, dest=0x81f40000, size=0x002a7404
xload.c:77: Waiting for XLOAD completion.
xload.c:87: XLOAD done, status = 0xbb.
XLOAD failed.
Done with container 2.
Skipping boot container 3.
Skipping boot container 4.
Skipping boot container 5.
Skipping boot container 6.
Skipping boot container 7.
Trying devtype=0 chipsel=1
nand_probe 0x0xd00f6ed0
Failed to init!
Trying devtype=2 chipsel=0


Not sure what to do now..... any help greatly appreciated...