USB interface to Mega128

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#1
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Hi there.

I was wondering if anybody ever had interfaced a Mega128 to the USB port of a PC?

Does anybody know anything on that topic? Please enlighten me with links, hints or whatever you see fit.

Best regards,
Morten W. J.

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Search this Forum for recent discussions on the topic. FTDI seems to be the concensus answer for ease of implementation.

Lee

You can put lipstick on a pig, but it is still a pig.

I've never met a pig I didn't like, as long as you have some salt and pepper.

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FTDI, a Scottisch company, offers several chips for USB conversion, either from/to serial or parallel.

I use the FTDI232 or so (can't remember exact name), which converts a UART (or a full blown RS232 port) to USB, and provides together with their driver software a virtual COM port on your PC. You don't need an RS232 interface circuit though, it directly takes the logic levels of the uC

One hint:
the FTDI chip has 0-4.5V logic, whereas your uC probably runs on 3V logic. So a level-converting buffer is needed in addition to the example circuit of FTDI!

Other than this, I have good experience with the chip and software.
Falk

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The "B" version of the FTDI chips actually allows you to interface to any logic level, 3.3 OR 5v. There is a "VCCIO" pin that, if you tie it to 3.3v, the interface is 3.3v logic compatible. If you tie it to 5v, then - you guessed it - you can interface to 5v..
Cool...

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Hello Morten,

i use the FT8U232AM from FTDI Chip too.

Best Regards

Fiffi

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I 'd like to buy one of this circuit (looks very interesting) FT245, I live in France, were can I buy only a few pieces for my own projects.

Thanks.

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Hello David,

i come from germany, and i have buyed the FTDI Chips from the "UNTRONIC AG" in germany.

www.unitronic.de

Please write an email and ask for an presentation of price at: Sonja.Sassmannshausen@Unitronic.de .

Can you please inform us, when you have found an seller ? (i only asked about the FT8U232AM, but they have them all ...)

Best Regards

Fiffi

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hello

i am from china,you may choose at43usb355,that is ery good.

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hello

i am from china,you may choose at43usb355,that is ery good.

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