Аудиокодек: список регистров

  Unused

  TX_EMPTY

TX FIFO Empty
0: No room for new sample in TX FIFO
1: More than one room for new sample in TX FIFO (>= 1 word)

  TXE_CNT

TX FIFO Empty Space Word Counter

  Unused

  TXE_INT

TX FIFO Empty Pending Interrupt
0: No Pending IRQ
1: FIFO Empty Pending Interrupt
Write 1 to clear this interrupt or automatically clear if interrupt condition fails.

  TXU_INT

TX FIFO Underrun Pending Interrupt
0: No Pending Interrupt
1: FIFO Underrun Pending Interrupt
Write 1 to clear this interrupt

  TXO_INT

TX FIFO Overrun Pending Interrupt
0: No Pending Interrupt
1: FIFO Overrun Pending Interrupt
Write 1 to clear this interrupt

  Unused

Команда U-Boot для чтения регистра

Bit fields structure

typedef union  ac_dac_fifos
{
  struct
  {
   unsigned unused0 : 1;
   unsigned txo_int : 1;
   unsigned txu_int : 1;
   unsigned txe_int : 1;
   unsigned unused1 : 4;
   unsigned txe_cnt : 15;
   unsigned tx_empty : 1;
   unsigned unused2 : 8;
  } b;
   unsigned long w;
} AC_DAC_FIFOS