Hello,
I've a USB to TTL converter like many of those sold cheaply in ebay and other places.
Those adapters connect to a computer USB port and (with an installed driver) simulate a RS232 output with 4( or 5) pins: 3v/5v, GND, TX, RX.
I use it for programming microcontrolers like the LPC1114 that have ISP.
Can I use it to connect my PC/Laptop to my Olinuxino ?
The connection should be something like:
USB 2 TTL GND ---- GND olinuxino
USB 2 TTL TX ---- RX olinuxino
USB 2 TTL RX ---- TX olinuxino
Would this work ? should the 3.3v pins be connected too ?
Thanks in advance
EDIT:
For reference, the USB to TTL adapter looks like this:
(http://www.vallesolucoes.net/product_images/c/390/TTL__99269_zoom.jpg)
the pins usually are labelled 5v, 3.3v ( there's usually some type of regulator ), TX, RX, GND and Reset.
Yes it should work. You ought to check how the power (+3/5) is connected and if the chip needs 3 or 5, and connect as appropriate. Mine is similar but different chip which needed 3.3V so I connected that (thus, 4-wires connected) and it's good.
You may get Tx & Rx the wrong way round. So long as you've figured the above out just try them the other way.
John
AFAIK the + pins should not be connected as, only the GND pins
the A13 will get power from the wall-wart adapter, and the USB dongle from the USB connection to the computer
TX goes to RX and RX to TX :)
I need to try this out soon, or just buy the olimex adapter cable
For sure try it without + but realise that some adapters need power from the non-USB end in which case you need to connect + and will need to make sure the voltage is right.
The "standard" for where Rx & Tx go is abused so often that you should not be surprised if you have toswap the connectors.