Thanks for googling but I already read that guy's page. :) His page is why during debug I experimented with transfer rate, buffer size, and compression rate (slowest possible buffer at slowest speed).
As for twisted pair, there is less than 1mm of wire between the camera and my Arduino UNO input pin, so not much to twist. If it can't xfer data at 9600 baud without errors.. ugh. P On Tue, Oct 21, 2014 at 3:20 PM, <[email protected]> wrote: > 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 >
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