Хост-контроллер USB2.0: список регистров

  BASE_ADDR

Base Address
These bits correspond to memory address signals [31:12], respectively.
This register contains the beginning address of the Periodic Frame List in the system memory.
System software loads this register prior to starting the schedule execution by the Host Controller.
The memory structure referenced by this physical memory pointer is assumed to be 4 KB aligned.
The contents of this register are combined with the Frame Index Register (FRINDEX) to enable the Host
Controller to step through the Periodic Frame List in sequence.

Note
Writes must be Dword Writes.

  Unused

Команда U-Boot для чтения регистра

Bit fields structure

typedef union  e_periodiclistbase
{
  struct
  {
   unsigned unused0 : 12;
   unsigned base_addr : 20;
  } b;
   unsigned long w;
} E_PERIODICLISTBASE