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Honored Contributor
Honored Contributoraccess to usb device in serial way
I want to connect FPGA to PC with usb device, but most applications access devices by serial (COM port). Is that possible let usb device appear as an additional COM port? Thanks!
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- I want to connect FPGA to PC with usb device, but most applications access devices by serial (COM port). Is that possible let usb device appear as an additional COM port? --- Quote End --- Yes, there are USB-to-serial converters and USB-to-FIFO converters that appear to the PC as a serial port. If you have ever used a USB-to-serial adapter cable, the ICs inside those cables are what you want. FTDI have a range of parts that work well. They have pre-made modules and cables that you can use to interface to an existing FPGA board, eg., UM245R and UM232H http://www.digikey.com/scripts/dksearch/dksus.dll?vendor=0&keywords=um245r http://www.digikey.com/product-detail/en/um232h/768-1103-nd/2614628 and cables with breakout headers http://www.digikey.com/product-detail/en/c232hm-ddhsl-0/768-1106-nd/2714139 http://www.digikey.com/product-detail/en/c232hd-ddhsp-0/768-1011-nd/2767783 If you need high performance, then the USB-to-FIFO mode devices are pretty good http://www.ovro.caltech.edu/~dwh/correlator/pdf/ftdi.pdf Cheers, Dave
