Синхронный последовательный интерфейс: список регистров

  Unused

  MWTC

Master Write Transmit Counter
In master mode, this field specifies the burst number that should be sent to
TXFIFO before automatically sending dummy burst. For saving bus bandwidth,
the dummy burst (all zero bits or all one bits) is sent by SPI Controller automatically.

0: 0 burst
1: 1 burst
***
N: N bursts
Can't be written when XCH=1.

Команда U-Boot для чтения регистра

Bit fields structure

typedef union  spi_mtc
{
  struct
  {
   unsigned mwtc : 24;
   unsigned unused0 : 8;
  } b;
   unsigned long w;
} SPI_MTC