Регистры H616: AHUB APBIF TXn FIFO Control

APBIF_TXnFIFO_CTRL

8.1.6. AHUB APBIF TXn FIFO Control - адрес: 0x20509a002 (смещение: 0x0020+n*0x0030(n=0~2))

Аудио-концентратор: список регистров

31 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 16
15 |•|•|•|•|•|•|•|•|•|•|•|•|•|•|•|•| 00

Unused

Bits 31 : 13

FTXN

Bit 12
R/WAC
0x0

Write 1 to flush TX FIFO, self clear to '0'.

Unused

Bits 11 : 10

XNTL

Bits 9 : 4
R/W
0x20

TX FIFO Empty Trigger Level
Interrupt and DMA request trigger level for TXFIFO normal condition
Trigger Level = TXnTL

Unused

Bits 3 : 1

TXNIM

Bit 0
R/W
0x0

TX FIFO Input Mode(Mode 0, 1)
0: Valid data at the MSB of TXFIFO register
1: Valid data at the LSB of TXFIFO register Example for 20-bit transmitted audio sample:
Mode0: FIFO_I[31:0]={APB_WDATA[31:12], 12'h0}
Mode1: FIFO_I[31:0]={APB_WDATA[19:0], 12'h0}

Bit fields structure

typedef union apbif_txnfifo_ctrl { struct { unsigned txnim : 1; unsigned unused0 : 3; unsigned xntl : 6; unsigned unused1 : 2; unsigned ftxn : 1; unsigned unused2 : 19; } b; unsigned long w; } APBIF_TXnFIFO_CTRL