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+/*
+ * Copyright (c) 2012, 2013, Joel Bodenmann aka Tectu <joel@unormal.org>
+ * Copyright (c) 2012, 2013, Andrew Hannam aka inmarket
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the <organization> nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * This demo demonstrates the use of the GAUDIN module to read audio channel 0.
+ * The audio channel gets read to display a very simple oscilloscope.
+ *
+ * It also demonstrates how to write your own custom GWIN window type.
+ */
+#include "gfx.h"
+
+/* Include our custom gwin audio oscilloscope */
+#include "gwinosc.h"
+
+/* Specify our timing parameters */
+#define MY_AUDIO_FREQUENCY 8000 /* 8khz. If this is too much try 4000 (4khz) */
+#define MY_AUDIO_CHANNEL 0 /* Use channel 0 - must be a mono channel */
+#define MY_AUDIO_FORMAT GAUDIO_RECORD_FORMAT1 /* The default format */
+
+/* Data */
+static GScopeObject gScopeWindow;
+
+/*
+ * Application entry point.
+ */
+int main(void) {
+ GHandle ghScope;
+ coord_t swidth, sheight;
+
+ gfxInit();
+
+ // Allocate audio buffers - 4 x 128 byte buffers.
+ // You may need to increase this for slower cpu's.
+ // You may be able to decrease this for low latency operating systems.
+ gaudioAllocBuffers(4, 128);
+
+ /* Get the screen dimensions */
+ swidth = gdispGetWidth();
+ sheight = gdispGetHeight();
+
+ /* Set up the scope window to fill the screen */
+ {
+ GWindowInit wi;
+
+ wi.show = TRUE;
+ wi.x = wi.y = 0;
+ wi.width = swidth; wi.height = sheight;
+ ghScope = gwinScopeCreate(&gScopeWindow, &wi, MY_AUDIO_CHANNEL, MY_AUDIO_FREQUENCY, MY_AUDIO_FORMAT);
+ }
+ gwinSetBgColor(ghScope, White);
+ gwinSetColor(ghScope, Red);
+ gwinClear(ghScope);
+
+ /* Just keep displaying the scope traces */
+ while (TRUE) {
+ gwinScopeWaitForTrace(ghScope);
+ }
+}