#!/bin/bash
#CH1 video line looks like:  |    |                  |      |
#CH2 HSYNC
#CH3 pixel clock

awk '{print $2}' < scope.dat > video.txt
awk '{print $3}' < scope.dat > hsync.txt
awk '{print $4}' < scope.dat > vsync.txt




awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a<q) && ( b<q) &&(c>=q)) { n++;} ; print n }' < video.txt > video.up
awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a<q) && ( b<q) &&(c>=q)) { n++;} ; print n }' < hsync.txt > hsync.up 
awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a<q) && ( b<q) &&(c>=q)) { n++;} ; print n }' < vsync.txt > vsync.up

awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a>q) && ( b>q) &&(c<=q)) { n++;} ; print n }' < video.txt > video.down
awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a>q) && ( b>q) &&(c<=q)) { n++;} ; print n }' < hsync.txt > hsync.down 
awk 'BEGIN { q=12500; n=0; }; {a=b; b=c; c=$1;  if ((a>q) && ( b>q) &&(c<=q)) { n++;} ; print n }' < vsync.txt > vsync.down

paste hsync.up hsync.down vsync.up vsync.down > cnt

awk 'BEGIN {op=0;}; {p=$3; if (p!=op) { print "V+ ",$1, " " p; op=p;}}' < cnt
awk 'BEGIN {op=0;}; {p=$4; if (p!=op) { print "V- ",$1, " " p; op=p;}}' < cnt