howto: added howto application

1 files changed, 77 insertions, 0 deletions

diff --git a/gr-howto-write-a-block/apps/howto_square.py b/gr-howto-write-a-block/apps/howto_square.py
new file mode 100755
index 000000000..8d3d870d8
--- /dev/null
+++ b/gr-howto-write-a-block/apps/howto_square.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+##################################################
+# Gnuradio Python Flow Graph
+# Title: Howto Square
+# Generated: Thu Nov 12 11:26:07 2009
+##################################################
+
+from gnuradio import eng_notation
+from gnuradio import gr
+from gnuradio import howto
+from gnuradio.eng_option import eng_option
+from gnuradio.gr import firdes
+from gnuradio.wxgui import scopesink2
+from grc_gnuradio import wxgui as grc_wxgui
+from optparse import OptionParser
+import wx
+
+class howto_square(grc_wxgui.top_block_gui):
+
+	def __init__(self):
+		grc_wxgui.top_block_gui.__init__(self, title="Howto Square")
+
+		##################################################
+		# Variables
+		##################################################
+		self.samp_rate = samp_rate = 10e3
+
+		##################################################
+		# Blocks
+		##################################################
+		self.sink = scopesink2.scope_sink_f(
+			self.GetWin(),
+			title="Input",
+			sample_rate=samp_rate,
+			v_scale=20,
+			v_offset=0,
+			t_scale=0.002,
+			ac_couple=False,
+			xy_mode=False,
+			num_inputs=1,
+		)
+		self.Add(self.sink.win)
+		self.sink2 = scopesink2.scope_sink_f(
+			self.GetWin(),
+			title="Output",
+			sample_rate=samp_rate,
+			v_scale=0,
+			v_offset=0,
+			t_scale=0.002,
+			ac_couple=False,
+			xy_mode=False,
+			num_inputs=1,
+		)
+		self.Add(self.sink2.win)
+		self.sqr = howto.square_ff()
+		self.src = gr.vector_source_f(([float(n)-50 for n in range(100)]), True, 1)
+		self.thr = gr.throttle(gr.sizeof_float*1, samp_rate)
+
+		##################################################
+		# Connections
+		##################################################
+		self.connect((self.thr, 0), (self.sqr, 0))
+		self.connect((self.src, 0), (self.thr, 0))
+		self.connect((self.thr, 0), (self.sink, 0))
+		self.connect((self.sqr, 0), (self.sink2, 0))
+
+	def set_samp_rate(self, samp_rate):
+		self.samp_rate = samp_rate
+		self.sink.set_sample_rate(self.samp_rate)
+		self.sink2.set_sample_rate(self.samp_rate)
+
+if __name__ == '__main__':
+	parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
+	(options, args) = parser.parse_args()
+	tb = howto_square()
+	tb.Run(True)
+