How to access the UART on Euclid?

[CLiu36]

I tried `find /dev/tty*`, which doesn't seems to show any port looks like uart.

Any suggestions?

[idata]

Hi Chang1,

Thank you for getting in contact, let's see if we can help you.Which port of the device are you using to connect to UART? Could you please show us a picture of your UART connection?Regards,Pablo M.

[Amit_M_Intel]

Hi,

It should be /dev/ttyS0.

can you try?

thanks,

Amit

[CLiu36]

Hi Pablo and Amit,

Thank you very much for your reply.

As shown in the image, I am trying to access the UART port at the bottom of Euclid, which is a micro USB port labeled as 'UART'.

I assume if I cut the usb cable, I can directly access the UART.

Before testing the /dev/ttyS0, I need to confirm the pin-out of the UART, and the voltage level it is operating (5V? 3.3V? 1.8V?). do not want to fry it.

I couldn't find any information on this.

Thank you very much for your time.

Kind Regards,

Chang

[idata]

Hi Chang,

Some other users have also asked for this information, so we are already looking into it. We are waiting for the details from our HW engineer, so we would really appreciate your patience in the meantime.Regards,Pablo M.

[Bo_J_Intel]

You can use a UART-USB cable to access this debug UART port. It is for kernel log output by default.The pin out definition is {VCC, TX, RX, NC, GND}, VCC is 3.3V.

We bought the cable from the following link. Pls pay attention that the default pin out is not correct (TX and RX are inversed). So remember to tell the vendor about the correct pin out you need.

https://world.taobao.com/item/6302450202.htm?fromSite=main&_u=e27u36ua0bce https://world.taobao.com/item/6302450202.htm?fromSite=main&_u=e27u36ua0bce

[聪马1]

突然发现淘宝

[idata]

These are the connector types used in Euclid:

- UART connector info: Manufacturer: JAE, Part number: DX4R005HJ5

- Power adapter plate interface info: Pogo pins, Pin outs: PAD1---+VBATTERY, PAD2---BATT_ID, PAD3---BATT_GNDAnd this is the pinout for Euclid's power adapter:

/servlet/JiveServlet/showImage/2-482259-379133/Euclid Power Adapter PinOut.png

Pablo M.

[MPall2 · Accepted solution]

Here's what worked.

Used the following items.

https://www.sparkfun.com/products/10031 SparkFun USB MicroB Plug Breakout - BOB-10031 - SparkFun Electronics

https://www.adafruit.com/product/954 https://www.adafruit.com/product/954

TX out of USB UART (Green) -> D-

RX into USB UART (White)-> D+

GND of USB UART (Black)-> GND

Don't connect Vcc.

Terminal settings -115200/8/N/1