Import LinuxCNC source tree

tests/biquad/expected

@@ -0,0 +1,10 @@
+0 0.123000 0.123000 
+0 0.550000 0.550000 
+0 1.120000 1.120000 
+0 0.123134 0.123134 
+1 0.000100 0.000100 
+1 1.123450 1.123450 
+1 444.555000 444.555000 
+1 0.000000 0.000000 
+0 1213.000000 1213.000000 
+0 0.000000 0.000000 

tests/biquad/runstreamer

@@ -0,0 +1,15 @@
+#!/bin/sh
+# first column is "enable", second is "in"
+
+halstreamer << EOF
+0 0.123
+0 0.55
+0 1.12
+0 0.1231344
+1 0.0001
+1 1.12345
+1 444.555
+1 0
+0 1213
+0 0
+EOF

tests/biquad/test.hal

@@ -0,0 +1,19 @@
+setexact_for_test_suite_only
+
+loadrt threads name1=fast period1=100000
+loadrt biquad
+
+loadrt sampler cfg=bff depth=500
+loadrt streamer cfg=bf depth=500
+
+net enable     streamer.0.pin.0  => sampler.0.pin.0 biquad.0.enable
+net in         streamer.0.pin.1  => sampler.0.pin.1 biquad.0.in
+net out        biquad.0.out      => sampler.0.pin.2
+
+addf streamer.0 fast
+addf biquad.0   fast
+addf sampler.0  fast
+
+loadusr -w sh runstreamer
+start
+loadusr -w halsampler -n 10