gaining accurate time on time sensitive measurements.

my sketch seems to not be creating my data log file.... here is the code...

My view on SD logging...
http://forum.arduino.cc/index.php?topic=232233.msg1678240#msg1678240

My approach is simple, if SD offends you, cut it off! Build or buy commercial, critical timing code and SD in same uC will drive non-professional programmers bananas... Do not do it.

Ray