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Author Topic: TTL Adaptor  (Read 7117 times)

apemberton

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TTL Adaptor
« on: 25 October 2012, 10:33:21 am »

I am just about to start work on my Tonido plugs and I have the TTL Adaptor. I assume the port accesses the SoC console port. I need to know if the TTL Adaptor requires a null-modem cable which I will have to buy or make. It is a pity that the adaptor is not a USB convertor but hey-ho.
 
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Tony Pemberton

NewIT_Jason

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Re: TTL Adaptor
« Reply #1 on: 25 October 2012, 01:35:33 pm »

Yes it does need a Null Modem cable/adapter. 
It is something we are looking to stock along side/with the TTL Adapter.
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apemberton

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Re: TTL Adaptor
« Reply #2 on: 28 October 2012, 12:14:29 pm »

Thanks for that. As it happens, I have some old DB9 to RJ45 adaptors on hand and have made a null modem cable with them and a 1 metre Cat 5 cable. Works fine for me. Now to get to work on a kernel more modern than 2.6.31. I note that Kernel 3.6.3 has a topkick machid 4101 so the Tonidoplug kernel may be getting mainlined.
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Tony Pemberton

bigbear59

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Re: TTL Adaptor
« Reply #3 on: 31 December 2013, 11:49:27 pm »

Click here: Google search for USB to TTL cable

On the backside of the plug there is an serial access port. Lift the rubber piece to allow access to the serial port. This port can be used to gain serial access to the plug computer. This serial access can be used during the Uboot process to modify the boot sequence of the plug.

The port has a 5-pin connector with 4-pins and one missing pin.

x - missing pin
0 - ground
0 - Tx
0 - Rx
0 - Vcc +3.3v
Only three connections are needed:
   ground -> ground
   Tx -> Rx
   Rx -> Tx

Above taken from: Techie2017's Tonidoplug2 page

This is my /var/log/messages, when I plug it in:
Dec 31 11:38:07 shuttle kernel: [10090487.744075] usb 5-1: new full-speed USB device number 12 using uhci_hcd
Dec 31 11:38:07 shuttle kernel: [10090487.906142] usb 5-1: New USB device found, idVendor=067b, idProduct=2303
Dec 31 11:38:07 shuttle kernel: [10090487.906156] usb 5-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 31 11:38:07 shuttle kernel: [10090487.906167] usb 5-1: Product: USB-Serial Controller
Dec 31 11:38:07 shuttle kernel: [10090487.906176] usb 5-1: Manufacturer: Prolific Technology Inc.
Dec 31 11:38:07 shuttle kernel: [10090487.909389] pl2303 5-1:1.0: pl2303 converter detected
Dec 31 11:38:07 shuttle kernel: [10090487.927558] usb 5-1: pl2303 converter now attached to ttyUSB0
Dec 31 11:38:07 shuttle mtp-probe: checking bus 5, device 12: "/sys/devices/pci0000:00/0000:00:1d.3/usb5/5-1"
Dec 31 11:38:07 shuttle mtp-probe: bus: 5, device: 12 was not an MTP device


BigBear
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Cheers,
BigBear59
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