ST STM32F40 Series

RM0090 Digital camera interface (DCMI)
Doc ID 018909 Rev 4 350/1422
13.8.9 DCMI crop window start (DCMI_CWSTRT)
Address offset: 0x20
Reset value: 0x0000 0x0000
13.8.10 DCMI crop window size (DCMI_CWSIZE)
Address offset: 0x24
Reset value: 0x0000 0x0000
313029282726252423222120191817161514131211109876543210
Reserved
VST[12:0
Reserv
ed
HOFFCNT[13:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:29 Reserved, must be kept at reset value.
Bit 28:16 VST[12:0]: Vertical start line count
The image capture starts with this line number. Previous line data are ignored.
0x0000 => line 1
0x0001 => line 2
0x0002 => line 3
....
Bits 15:14 Reserved, must be kept at reset value.
Bit 13:0 HOFFCNT[13:0]: Horizontal offset count
This value gives the number of pixel clocks to count before starting a capture.
313029282726252423222120191817161514131211109876543210
Reserved
VLINE13:0]
Reserved
CAPCNT[13:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:30 Reserved, must be kept at reset value.
Bit 29:16 VLINE[13:0]: Vertical line count
This value gives the number of lines to be captured from the starting point.
0x0000 => 1 line
0x0001 => 2 lines
0x0002 => 3 lines
....
Bits 15:14 Reserved, must be kept at reset value.
Bit 13:0 CAPCNT[13:0]: Capture count
This value gives the number of pixel clocks to be captured from the starting
point on the same line. It value should corresponds to word-aligned data for
different widths of parallel interfaces.
0x0000 => 1 pixel
0x0001 => 2 pixels
0x0002 => 3 pixels
....