Questions about USB Pipes and End Point

[Leopoldo Silva]

Hello guys, I hope that someone can answer some question about USB communications, I´m new at this forum and My questions are:

What is a USB Pipe?
What is End Point, How it works in PIC Microcontroller....

Because The datasheet and Internet USB in a Nutshell, they explain and explain but I cannot understand what they want to say....

Waiting an answer

Thanks!!

 

[josiphal]

Look to USB stack source code and things will be much more clear. I also spent time reading about USB (and nutshell version, btw it is good one), but it was not clear until I printed complete source for MSP4305xx USB stack, and figure out line by line, what is going on, executing code with full logs. After, everything become complete clear, and I made my own stack with transfer rate 1 MB/s (https://forum.43oh.com/topic/2775-msp430-usb-benchmark/).

Data are going by pipes, and endpoints have in/out buffers, where are stored received data, or prepared data for sending. Easiest way is CDC, because on PC side programing is done like with serial port (using "usbser.sys" with ReadFile/WriteFile Win32 API functions). Generic bulk is faster, but job on PC side is more complicated than CDC (using "winusb.sys" with WinUsb_ReadPipe/WinUsb_WritePipe Win32 API function).

 

[Leopoldo Silva]

Ok, I´ll try this one!! Thank you!!