Allwinner A20 - Page 372

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 372 / 812
Bit
Read/W
rite
Default/
Hex
Description
31:03
/
/
/
02
R/W
0
DBN
Buffer selected at next storing for CSI
0: Next buffer selection is buffer-A
1: Next buffer selection is buffer-B
01
R
0
DBS
output buffer selected status
0: Selected output buffer-A
1: Selected output buffer-B
00
R/W
0
DBE
Double buffer mode enable
0: disable
1: enable
If the double buffer mode is disabled, the buffer-A will be always
selected by CSI module.
4.1.5.25. CSI CHANNEL_1 STATUS REGISTER
Offset Address: 0X012C
Register Name: CSI0_C1_BUF_STA_REG
Bit
Read/W
rite
Default/
Hex
Description
31:08
R
0
LUM_STATIS
luminance statistical value
When frame done interrupt flag come, value is ready and will last
until next frame done.
For raw data, value = (G>>1+R+G)>>8
For yuv422, value = Y>>8
07:02
/
/
/
01
R
0
VCAP_STA
Video capture in progress
Indicates the CSI is capturing video image data (multiple
frames). The bit is set at the start of the first frame after enabling
video capture. When software disables video capture, it clears
itself after the last pixel of the current frame is captured.
00
R
0
SCAP_STA
Still capture in progress