Thank you very much, Oleg. I missed the circuit schematics. Now I have only to make the cable and start with the experiments.
Ángel. 2010/2/2 Oleg Dzhimiev <[email protected]> > Ángel, > > J15 > pin 1: GND > pin 2: camera input, GPIO[10], +5V > pin 3: camera input, to GND > pin 4: camera output, GPIO[11], +5V > > You can begin with connecting 1-3 & 2-4, setting correct parameters and > testing with oscilloscope how it works. > > The circuit diagram can be found on our wiki - the link is right under the > 10369 functional diagram. > > Oleg > > > On 2 February 2010 14:12, Ángel <[email protected]> wrote: > >> Thank you very much, Oleg & Andrey. >> >> I'm in the process of understanding the camera. Since I have access to a >> digital sampling oscilloscope I would like to play a little with triggering. >> >> So, what pins of J15 must I connect the signal and ground wires of the >> function generator output to? >> >> Thank you, again. >> >> Ángel. >> >> 2010/2/2 Andrey Filippov <[email protected]> >> >> Ángel, >>> >>> Couple more notes about external triggering. >>> >>> This is a "Electronic Rolling Shutter" sensor, so there are some natural >>> limitations on what you can do with external triggering. If you want just to >>> synchronize two cameras - it is easy, but you can not trigger the camera >>> that way from a flash (there are some other ways how to do that). External >>> trigger on the sensor level work in the following way: >>> 1 - sensor waits for the trigger to occur, to data and sync signals are >>> output >>> 2 - after the trigger sensor skips 8 scan lines (for some internal >>> reasons) >>> 3 - sensor _starts_ to erase scan line - one by one - the it will take >>> about 1/15 seconds to clear the full 5 MPix frame >>> 4 - after waiting specified exposure time from start of the erasing >>> process (sensor does not need to wait the full frame to be erased!) sensor >>> starts readout - line by line, at the same pace the erase process (initiated >>> at step 3). >>> The process of readout (and so exposure of the last line in the frame) >>> will ens in 8*scan_line_time + exposure time + frame_readout_time. >>> >>> If you want to catch some instantaneous event (i.e. flash) you'll need to >>> set exposure time to > frame readout time and initiate that event after the >>> full frame is erased but before the first line is read out. >>> >>> Second note is related to the camera driver - because of pipeline >>> operation (described in >>> http://www.linuxfordevices.com/c/a/Linux-For-Devices-Articles/Elphel-camera-under-the-hood-from-Verilog-to-PHP/) >>> it heavily depends on the frame sync pulses from the sensor. So if the >>> sensor is stopped so is the driver that among others handle all the >>> parameter changes. If the camera is set to external trigger mode and there >>> is no trigger coming - the driver will effectively get stuck. >>> >>> Andrey >>> >> >> >> >> -- >> Elphel NC353L-369 (12-36 VDC) + Computar H2Z0414C-MP >> > > -- Elphel NC353L-369 (12-36 VDC) + Computar H2Z0414C-MP
_______________________________________________ Support-list mailing list [email protected] http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
