USB interface to microprocessor?

[[email protected]]

need to add a USB interface to an existing microprocessor to make it a
slave USB device, receiving byte code commands, and sending digitized
data arrays.

Is there an off-the-shelf module available for that? e.g. that would
convert USB to SPI or bidirectional parallel etc?

 

[Spehro Pefhany]

need to add a USB interface to an existing microprocessor to make it a
slave USB device, receiving byte code commands, and sending digitized
data arrays.

Is there an off-the-shelf module available for that? e.g. that would
convert USB to SPI or bidirectional parallel etc?

You can buy a USB <-> RS232 serial cable for cheap (like $10-$15 US
retail)


Best regards,
Spehro Pefhany

 

[M. Noone]

Take a look at FTDI: http://www.ftdichip.com/

 

[Jack// ani]

If...I picked you fine....I'll be sending form the USART which will be
converted into USB....but what about the data speed??

 

[RESO / Claude GUTH]

see

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3639
http://www.maxim-ic.com/appnotes.cfm/appnote_number/3025

 

[Derek Potter]

Take a look at FTDI: http://www.ftdichip.com/

Indeed. Some of their little modules will, as Spehro suggested,
convert the USB to serial but they also do a range that provides a set
of parallel lines, which may be more useful.

 

[andrew queisser]

We've had good success with the parallel I/O FTDI FT245BM. They also have
serial chips. Here are some DIP modules if you don't want to deal with SMD:

http://apple.clickandbuild.com/cnb/...ducts-null&prodCategoryID=3&title=DIP+Modules

So far I haven't found any USB 2.0 high-speed chips like this so if you need
maximum throughput you might have to go a different route.

Andrew

 

[Ian Stirling]

If...I picked you fine....I'll be sending form the USART which will be
converted into USB....but what about the data speed??

Whatever you set up at the PC end.