USB 18F4550 in High or full speed???

[lengcallrobot]

Maybe, but since that post was over 1 1/2 years ago, I don't really remember what the problem was in the first place.

True, packet size is limited, and again, you're limited by the number of events you can fire off in X time, and limited by how fast the firmware can reload the buffer with useful data.

But again, as mentioned in the other post, the PICs are not capable of high speed (480mbps) mode, so you're limited to FULL speed (12mbps) mode at best.
If the buffer is limited to 64 bytes, and you're limited to 1ms per xfer event, then, there's you're limit...64kB/sec.
I guess I don't really know if you can go faster than that on a PIC. I assume it's possible, but don't know. As I posted last year, I've been able to max out FULL speed mode, just barely.

Thank for your post, however, for other friend and me, we can only send the data at 64kbit/s which is too slow comparing to Low-speed (1.5Mbit/s) or Full-speed (12Mbit/s).

My question now is: How to configure the PIC to run at Low-speed mode or Full-speed mode? (I use PBP and VB6).

[skimask]

One other option that doesn't take too many pins and has very little hardware hassle is the CP2103 type USB/Serial converter chips. They work great and they can be configured to go pretty fast.

[Bruce]

My question now is: How to configure the PIC to run at Low-speed mode or Full-speed mode?

Look in your USB.TXT file. There's a section that explains how to run at full-speed and
low-speed.