[utils] - make the identify-output have 1:3 mark/space ratio to assis…

…t in phase debugging.
ipxe · Mar 3, 2011 · e29171a · e29171a
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diff --git a/man/pb_test-flash-2Hz.1 b/man/pb_test-flash-2Hz.1
@@ -17,7 +17,7 @@ Flash the LEDs on all 24 channels, simultaneously at 5.5555 MHz (the limit of th
 .LP 
 \fBpb_test-identify-output  BIT_N\fR
 .IP 
-Flash one specific bit at 2Hz. Useful for channel identification. Invoke with \fB-h\fR for help.
+Flash one specific bit at 2Hz. Useful for channel identification and phase check. Invoke with \fB-h\fR for help.
 
 .SH "SEE ALSO"
 \fBpulseblaster\fR(1), \fBpb_driver-load\fR(1)
diff --git a/pbctl/pb_test-identify-output.sh b/pbctl/pb_test-identify-output.sh
@@ -9,15 +9,17 @@
 
 #A very simple pulseblaster program: so trivial we can store it as a string!
 #Note that the first 3 bytes must be prepended as the outputs that we set.
-BIN_IMAGE_END="00 0000 017d 783d 0000 0000 0006 017d 783d"
+BIN_IMAGE_END="00 0000 00be bc1d 0000 0000 0006 023c 345d"
 
 #Program and start interface.
 PROGRAM=/sys/class/pulseblaster/pulseblaster0/program
 START=/sys/class/pulseblaster/pulseblaster0/start
 STOP=/sys/class/pulseblaster/pulseblaster0/stop
 
 if [ "$1" == "-h" -o "$1" == "--help" ] ;then
-	echo "Identify pulseblaster outputs. Flash one line at 2Hz."
+	echo "Identify pulseblaster outputs. Flash requested line at 2Hz."
+	echo "To verify phase (in case of inversion), the mark:space ratio is 1:3 (0.25s logic 1 : 0.75s logic 0)."
+	echo "The other lines are always low." 
         echo "Usage: `basename $0` BIT_N"
 	echo "       where BIT_N is 0 .. 23"
 	exit 1
@@ -70,5 +72,6 @@ echo 1 > $START
 
 #Say something
 echo "Pulseblaster is now flashing output bit $BIT ($OUT) at 2Hz."
+echo "The mark:space ratio is 1:3 (0.25s logic 1 : 0.75s logic 0). All other lines stay low." 
 echo "To stop it: 'echo 1 > $STOP'"