Help with FTDI (USB->UART) connection

RE: Help with FTDI (USB->UART) connection

Jerod — Tue, 17 Feb 2015 18:55:46 GMT

Thanks Jan -- this was most helpful!

Sometimes just knowing the setup someone else has compiled is sufficient enough.

The thing that fixed this for me is when you said -- which direction is the TX/RX.
I had neglected to remember they were probably from the PC -- and not the Nordic.

The working setup is now:

Using 3 wires: WHITE, GREEN, BLACK White is configured as TX (from Nordic output point of view) Green is configured as RX (from Nordic input point of view) Black is GND

I was able to get this working at both 38400, and 115200 -- Thanks for your help!

RE: Help with FTDI (USB->UART) connection

endnode — Mon, 16 Feb 2015 00:45:00 GMT

Hi Jerod,

I'm using FTDI UART-to-USB cables with Nordic's nRF51 chips on daily basis and it definitely works. However I'm not using HW flow control and I always connect only 3 wires (GND, Tx and Rx). There is usually also catch in Tx/Rx settings because you always need to double check what's the current view (if Tx/Rx colors on the cable correspond to PC view or Nordic;).

If you would be interested into my settings (I'm using mostly only UART Tx from Nordic at higher speeds like 115k or 250k for debug output into console on PC) just let me know.

Cheers Jan