Hello Kaien, > "http://192.168.0.9/tuneseq.php?mode=latency"; page, i set "21 EXPOSURE 0".
is not the right place to make the changes - this page is designed to troubleshoot latency issues and then copy the data to the C header files with the definitions. Please follow Oleg's recommendations how to adjust frames ahead values. The latencies on the tuneceq.php page (and the data is overwritten in memory each time you switch between TRIG=4 and TRIG=2) need to precisely match the actual hardware latencies so the driver "knows" when to apply changes so the particular frame (but not the one before) will be acquire with the new parameters. Reducing those values will not make sensor to respond to the changes faster, driver will just "think" that sensor is faster and send the related i2c command later. The exposure latency is rather long, especially in the sensor free-running mode (TRIG=0) - exposure starts during the previous frame readout, when using TRIG=4 you can save one frame, because in this mode there is no frame exposure overlap, sensor: 1 - waits for the trigger (by default generated internally in the camera FPGA) 2 - skips 8 scan lines (fro some internal reasons) 3 - starts exposure of the first line 4 - waits exposure time (starting exposure of lines 2,3,...) 5 - starts readout of the first line Additionally, when using TRIG=0 mode there is additional restrictions (seems not to be documented in the sensor datasheet) - you can not change exposure on the next frame after it was already changed, so when implementing "HDR" mode (alternating short/long exposures) it is possible to have odd/even exposure change only in TRIG=4 mode. With TRIG=0 the minimal period would be 4 frames (2 - long, 2 - short) Andrey
_______________________________________________ Support-list mailing list Support-list@support.elphel.com http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
