Регистры Allwinner H616
Сокращения  |  Дерево шин  |  Карта памяти
TVE_014_REG
7.2.5. TV Encoder Front/Back Porch Register - адрес: 0x6520014 0x6524014 (смещение: 0x0014)

ТВ-кодер: список регистров

  Unused

Bits 31 : 25

  BACK_PORCH

Bits 24 : 16
R/W
0x76

Specify the width of the back porch in encoder clock cycles. Min value is
( 0x76 = burst_width+breeze_way+17)
8 bits unsigned integer.
20p mode, is 260
1080i/p mode, is 192

  Unused

Bits 15 : 12

  FRONT_PORCH

Bits 11 : 0
R/W
0x20

Must be even.
Specify the width of the front porch in encoder clock cycles. 6 bits unsigned even integer. Allowed range is 10 to 62.

In 1080i mode the value is 44.

Команда U-Boot для чтения регистра

md 6520014 1
md 6524014 1

Bit fields structure 

typedef union  tve_014_reg
{
  struct
  {
   unsigned front_porch : 12;
   unsigned unused0 : 4;
   unsigned back_porch : 9;
   unsigned unused1 : 7;
  } b;
   unsigned long w;
} TVE_014_REG
Allwinner H616 Manual