OpenWrt Forum Archive

Topic: MR3220 v2.1 bricked

The content of this topic has been archived between 10 Apr 2018 and 2 May 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Hi! I got bircked MR3220 v2.1 after reinstalling openwrt software. Can someone publish pinouts for serial connection? I can't find their on the web hmm
I got ca-42 cable, ready for serial connection, but i don't know where to connect it on router.

http://dioptimizer.narod.ru/files/images/MR3220V2-UART.png

So i should connect to TP18 and TP28 or TP38 and TP48? What with GND?
I tried connect to http://scr.hu/0tgp/5z09f at front but it did not work

(Last edited by smrodek11 on 6 Feb 2013, 23:45)

smrodek11 wrote:

So i should connect to TP18 and TP28 or TP38 and TP48? What with GND?
I tried connect to http://scr.hu/0tgp/5z09f at front but it did not work

GND and VCC already connected to circuit , you need 10k/15k pull up resistor when working with CA-42 cable.

So i need connect to TP18 and TP28 or TP38 and TP48 with resistors?

But at front or back side? Info on this wiki is not for MR3220 v2.1 hmm
And why you showed me TP18 and TP28 and TP38 and TP48?
Look here: https://forum.openwrt.org/viewtopic.php?pid=175777 buy this is v2

(Last edited by smrodek11 on 7 Feb 2013, 12:24)

smrodek11 wrote:

But at front or back side? Info on this wiki is not for MR3220 v2.1 hmm
And why you showed me TP18 and TP28 and TP38 and TP48?
Look here: https://forum.openwrt.org/viewtopic.php?pid=175777 buy this is v2

That is rule to get CA-42 cable working no matter what router type you use.

Can i connect to this pinouts or not: http://scr.hu/0tgp/ew6oc (TP18, TP28) ?

(Last edited by smrodek11 on 7 Feb 2013, 14:21)

smrodek11 wrote:

Can i connect to this pinouts or not: http://scr.hu/0tgp/ew6oc (TP18, TP28) ?

Do not connect your CA-42 directly to TP18 and TP28 , just make jumper cable as shown at picture.

With what? And whats next? lol.

With what i must connect "jumper cable" lol.

If you have followed there rather difficult thread above, then you have the CA42 connected to Tx, Rx and GND. At the other end is a usb plug. Plug it in your computer and follow the instructions for debricking in the WiKi.

I have connected at front TX, RX and GND AND ITS NOT WORKING
So my question. WHERE I MUST CONNECT TX RX AND GND CABLES ON ROUTER?

http://img202.imageshack.us/img202/1811/3220v2jumpercable.jpg

Uploaded with ImageShack.us

Connect your usb-ttl cable to serial pin header ,after making this jumper , I hope this picture  make clear for you.

(Last edited by xopal on 7 Feb 2013, 17:51)

Can i use cables from usb cable to do it?

Still not working neutral

Can you show me connected cable at front page? (usb-ttl cable connected)

I received something:
http://scr.hu/0tgp/axjpz
Hmm?
VCC cable is needed to be connect?

(Last edited by smrodek11 on 8 Feb 2013, 20:52)

- double check your soldering with a multimeter
- provide a schematic of what you soldered, and also some photos of the result
- provide the connection settings of your terminal program

DO NOT USE VCC... only gnd tx and rx.

Last info from router via telnet:

U-Boot 1.1.4 (Aug 22 2012 - 15:58:30)

AP121 (ar9330) U-boot

DRAM:  32 MB
led turning on for 1s...
id read 0x100000ff
flash size 4194304, sector count = 64
Flash:  4 MB
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   ag7240_enet_initialize...
No valid address in Flash. Using fixed address
No valid address in Flash. Using fixed address
: cfg1 0x5 cfg2 0x7114
eth0: 00:03:7f:09:0b:ad
ag7240_phy_setup
eth0 up
: cfg1 0xf cfg2 0x7214
eth1: 00:03:7f:09:0b:ad
athrs26_reg_init_lan
ATHRS26: resetting s26
ATHRS26: s26 reset done
ag7240_phy_setup
eth1 up
eth0, eth1
Autobooting in 1 seconds
## Booting image at 9f020000 ...
  Uncompressing Kernel Image ... OK

Starting kernel ...

[    0.000000] Linux version 3.3.8 (cindy@cindy-laptop) (gcc version 4.6.3 20120   201 (prerelease) (Linaro GCC 4.6-2012.02) ) #37 Wed Oct 17 13:22:33 WIT 2012
[    0.000000] bootconsole [early0] enabled
[    0.000000] CPU revision is: 00019374 (MIPS 24Kc)
[    0.000000] SoC: Atheros AR9330 rev 1
[    0.000000] Clocks: CPU:400.000MHz, DDR:400.000MHz, AHB:200.000MHz, Ref:25.00   0MHz
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 02000000 @ 00000000 (usable)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Zone PFN ranges:
[    0.000000]   Normal   0x00000000 -> 0x00002000
[    0.000000] Movable zone start PFN for each node
[    0.000000] Early memory PFN ranges
[    0.000000]     0: 0x00000000 -> 0x00002000
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pag   es: 8128
[    0.000000] Kernel command line:  board=TL-WR741ND-v4 console=ttyATH0,115200    rootfstype=squashfs,jffs2 noinitrd
[    0.000000] PID hash table entries: 128 (order: -3, 512 bytes)
[    0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32    bytes
[    0.000000] Writing ErrCtl register=00000000
[    0.000000] Readback ErrCtl register=00000000
[    0.000000] Memory: 29148k/32768k available (2089k kernel code, 3620k reserve   d, 400k data, 208k init, 0k highmem)
[    0.000000] SLUB: Genslabs=9, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, No   des=1
[    0.000000] NR_IRQS:51
[    0.000000] Calibrating delay loop... 265.42 BogoMIPS (lpj=1327104)
[    0.080000] pid_max: default: 32768 minimum: 301
[    0.080000] Mount-cache hash table entries: 512
[    0.090000] NET: Registered protocol family 16
[    0.090000] gpiochip_add: registered GPIOs 0 to 29 on device: ath79
[    0.100000] MIPS: machine is TP-LINK TL-WR741ND v4
[    0.550000] bio: create slab <bio-0> at 0
[    0.560000] Switching to clocksource MIPS
[    0.560000] NET: Registered protocol family 2
[    0.570000] IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.570000] TCP established hash table entries: 1024 (order: 1, 8192 bytes)
[    0.570000] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[    0.580000] TCP: Hash tables configured (established 1024 bind 1024)
[    0.590000] TCP reno registered
[    0.590000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.600000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.600000] NET: Registered protocol family 1
[    0.630000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.630000] JFFS2 version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY   ) (c) 2001-2006 Red Hat, Inc.
[    0.640000] msgmni has been set to 56
[    0.640000] io scheduler noop registered
[    0.650000] io scheduler deadline registered (default)
[    0.650000] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[    0.660000] ar933x-uart: ttyATH0 at MMIO 0x18020000 (irq = 11) is a AR933X UA   RT
[    0.660000] console [ttyATH0] enabled, bootconsole disabled
[    0.660000] console [ttyATH0] enabled, bootconsole disabled
[    0.680000] m25p80 spi0.0: found en25q32b, expected m25p80
[    0.680000] m25p80 spi0.0: en25q32b (4096 Kbytes)
[    0.690000] 5 tp-link partitions found on MTD device spi0.0
[    0.690000] Creating 5 MTD partitions on "spi0.0":
[    0.700000] 0x000000000000-0x000000020000 : "u-boot"
[    0.710000] 0x000000020000-0x0000000fea54 : "kernel"
[    0.710000] mtd: partition "kernel" must either start or end on erase block b   oundary or be smaller than an erase block -- forcing read-only
[    0.720000] 0x0000000fea54-0x0000003f0000 : "rootfs"
[    0.730000] mtd: partition "rootfs" must either start or end on erase block b   oundary or be smaller than an erase block -- forcing read-only
[    0.740000] mtd: partition "rootfs" set to be root filesystem
[    0.750000] mtd: partition "rootfs_data" created automatically, ofs=390000, l   en=60000
[    0.750000] 0x000000390000-0x0000003f0000 : "rootfs_data"
[    0.760000] 0x0000003f0000-0x000000400000 : "art"
[    0.770000] 0x000000020000-0x0000003f0000 : "firmware"
[    0.790000] ag71xx_mdio: probed
[    0.790000] eth0: Atheros AG71xx at 0xba000000, irq 5
[    1.350000] eth0: Found an AR7240/AR9330 built-in switch

But i got shitted connected cable, i need to solder again, better :C

:C
So i'll try to connect this shit :C
I can connect only GND and TX (without RX) to see if this working?

(Last edited by smrodek11 on 11 Feb 2013, 17:17)