USBDemo, something to learn USB a little bit

[Josuetas]

Hi, This really is a nice post, I am going to work with it, i will have to use 18f2550 since it is the available part around here.

1. Any problem with it being the 2550? someone said "Thank god you didn´t choose the 2550" before.

2. I guess i`ve read the answer to this but...: Usb Communications require somehow a "master"(host) and a "slave"? if this is so, i would never be able to communicate two pics through USB would I?, where i am going is that i intend to control USB devices but this could never be done if this is true, has anyone figured something without buyign those ugly USB HOST controllers? they really are a pain in the a.. you can´t find them at all(not here).

I have a uC develpment to control by serial (rS232) port some GSM phones, but the newer models dont support serial but USB, what should be done to transfer data between a uc and them?

It seems to me like an step backwards the fact that usb had lost the simplicity of RS232 communications in this matter.

thanks for the hobby time again