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Question about USB connection diagram

tabarus12

Hi all, its been a while since Ive used this discussion resource since I was not getting any answer from no one so after running out of options for info Ill give it a shot, hopefully this time around its different.

 

I want to connect a usb connection to a project of mine but I cant seem to find out what D- and D+ are on the usb connection, I know one is transmission and the other is reception but which is which.

 

I went through tutorials and wiki articles on the net and other blog posts and did not found out which I should connect to Tx and which to Rx on my project, the board that Im using has Tx and Rx instead of D- and D+, so if any of you guys know which goes which Ill realy appreciate it.

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    You can't connect the USB connections D+/D- to Tx and Rx (at least not without it failing to operate). More detail on the USB standard is described on the USB Wikipedia page. Tx and Rx sounds like (perhaps) a serial interface from a microcontroller UART. This is directly not compatible with USB. Hard to know without more information. If you are interfacing a UART, then you need a USB to serial device which does more than handle the electrical conversion. Typical devices use a FTDI chip to do this. Most are surface-mount, but ready-made converters exist, and they need a driver for your OS to look like a serial connection. Here are some examples, although cheaper versions exist.