Gericom Posted July 17, 2014 Report Share Posted July 17, 2014 Hello everyone.I am planning on making a simple usb capture device (I know they exist, but I want to do it myself), that can capture analog rgb video from scart. I know how to do this (I have 2 2 channel high speed adc's and a lm1881 sync separator), but before I begin, I want to be sure I can send the required amount of data over the usb. Using the serial on the papilio this is not possible, so I am considering buying an evaluation board for the FT232H high speed usb chip (UM232H). The required speed needs to be arround 35MByte/s for 24 bit rgb, but if needed I can lower it by using 16 bit instead. According to the datasheet of the FT232H, it should be able to do speeds up to 40MByte/s.My question is if this is possible with the FT232H. Or is there maybe another chip/evaluation board I can better use instead. Link to comment Share on other sites More sharing options...
hamster Posted July 17, 2014 Report Share Posted July 17, 2014 It should work, but I do wonder how 'smooth' the transfer is - for example, if the connected PC is busy the transfer might stall every now and then. You may end up needed a larger buffer on the FPGA.than the on-chip 4kB on the FT232H - after all, 4k is consumed in every 100ns or so. And if it does splutter a little there isn't much extra bandwidth to catch up,,,. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.