On 2014-10-21 12:20, Peter Torelli wrote:
Has anyone used a VC0706 chip plus camera? <snip>
Sorry to play "Google Expert", but it looks like someone else has seen
the same thing:
http://fabienroyer.wordpress.com/2011/08/12/driving-an-adafruit-vc0706-ttl-serial-jpeg-camera-with-a-netduino/
Quoting his article:
Out of 100 pictures taken at the higher resolution, only one did not
have any artifacts.
[...]
In the large and medium resolutions, 1 picture out of 100 is generally
corrupt and cannot be viewed. There could be several root causes for
these artifacts and data corruptions:
1. The connection I’m using between the camera and the Netduino is not
shielded or twisted to minimize radio and electromagnetic interference.
I haven’t had the chance to validate this yet.
2. The serial buffer size vs. the baud rate is critical in minimizing
errors: I was able to read a maximum of 120 bytes at a time @ 115200
baud without losing data with the current connection to the camera.
Larger buffers only seem to increase the error rate to unacceptable
levels which makes reading large images a slow process. Again, a
shielded and twisted cable would likely help using larger buffers.
_______________________________________________
dorkbotpdx-blabber mailing list
[email protected]
http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber
