readme.txt

来自「cypress fx2 firmware代码示例」· 文本 代码 · 共 15 行

The purpose of this code is to demonstrate how the cpu can "dynamic OUT ...automaticity" in EZUSB
FX2 GPIF applications.

What does that mean?
By setting REVCTL.1=1 (DYN_OUT) the cpu can dynamically switch between "AUTO" 
and "MANUAL" mode, perhaps to edit an OUT packet, without having to do a FIFORESET.

NOTE: - The cpu can't source an OUT packet in "AUTO"...
      - In AUTO mode the cpu is out of the data path...
      - The core doesn't notify the cpu of zero length OUT packets (in Either mode)
      - Typ. this is handled "out-of-band" over endp0 or endp1

Chapter 10 of the EZUSB FX2 TRM explains the General Programmable Interface (GPIF)
Please see "readme.txt" file for more details