If your sensor is generating BT656 (that is YCbCr with embedded sync's,
horizontal and vertical blanking etc) in D1 format, then you might not
have to do too much. The default input to the 355 is from the NTSC
decoder which uses BT656.
If the sensor output is not identical to the output of an NTSC decoder,
then you will need to modify the ccdc so that you can capture your
frames correctly. If your sync signals are external you will need to
enable the inputs to the VPFE. It is likely that you may need to modify
dm355_vpfe.c and tvp5146.c as well if the sensor raw output is a
different resolution or the sensor itself needs to be setup differently.
If your sensor does not have an automatic AWB/AE mode, then you will
need to write an application level control loop to manage this.
If you haven't guessed - this can be a big job if your sensor isn't a
direct substitute for a decoder.
Steve
Anthony Gutierrez wrote:
I want to use a CMOS imager outputting 8bit YCbCr 4:2:2 with the dm355
EVM. What do I need to modify within the davinci_VPFE.c and
ccdc_dm355.c driver files to do something like this? And are there any
other files I need to modify? Is there any guide or documentation for
using these drivers?
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