SOLVED: Post #11 - IOC on negative edge sometimes triggers twice on single press

[richard]

see the white negative going spikes that indicate when samples are taken by my routine,

the spikes are 1 uS in width , on my rigol 100MHz 1Gs/S oscilloscope @ 0.5mS/div they are not accurately rendered nether are all that are in scope always even visible . saleae to the rescue at max res.
digital tools need to be understood and taken with a pinch of salt

i should point out @100uS/div all are visible but the display window is too small to see what i was looking for