When odd errors occur I first look at the power supplies. You might put a scope on the camera board power supplies, maybe try tacking on some capacitors.
Good luck! Ron On Oct 21, 2014 5:44 PM, "Peter Torelli" <[email protected]> wrote: > > 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 >> > > > _______________________________________________ > dorkbotpdx-blabber mailing list > [email protected] > http://music.columbia.edu/mailman/listinfo/dorkbotpdx-blabber >
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