sorry, defective fingers on last post... in item 2, the correct value for
lncnt should be 0x3b not 0x4b.
=======================================================
Lawrence Glaister VE7IT email: [EMAIL PROTECTED]
1462 Madrona Drive http://jfm.bc.ca
Nanoose Bay BC Canada
V9P 9C9
=======================================================
----- Original Message -----
From: Lawrence Glaister <[EMAIL PROTECTED]>
To: Claudio Matsuoka <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Thursday, May 25, 2000 12:35 PM
Subject: [linux-usb] OV511 raw image format
> item 1:
> To enable the raw image output from the ov7610 sensor, it looks like one
> needs to clear the comh[2] bit (register 0x28). The YG feature seems to be
> indirectly mentioned in the 2.2 Bus standards section on page 4 of the
7610
> data sheet. I get the impression that the YG feature outputs the green(of
> RGB) or Y(of YUV) on the y channel data stream. The doc says the y channel
> datastream is either Y image plane data, G image plane data or odd line
raw
> pixel data.
>
> item 2:
> I have been pouring over the registers and noticed what appears to be an
> error in the values used for lncnt. (claudio see line 845-856 of your
latest
> ov511.c). The values are set to 0x3d for 480 line modes which according to
> the spec would allow 496 lines of data to be transfered from the sensor...
I
> think the correct values should be 0x4b. The other resolutions seem to
have
> a similar problem. The ov511 data sheet shows a default of 0x1d which
> computes as (0x1d+1)*8 = 0xf0 = 240 lines. Is there a reason why we allow
> the sensor to send up to 16 extra lines? The lncnt value ultimately gets
> output to the ov511 register 0x13. I wonder if this may be the cause of
the
> overnight hanging problems... could we be getting extra data from the
sensor
> which is not being read by the driver, resulting in a pile up of unread
data
> (ov511 fifo full?).
>
> =======================================================
> Lawrence Glaister VE7IT email: [EMAIL PROTECTED]
> 1462 Madrona Drive http://jfm.bc.ca
> Nanoose Bay BC Canada
> V9P 9C9
> =======================================================
>
>
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