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diff --git a/ucoo/hal/adc/test/test_adc.cc b/ucoo/hal/adc/test/test_adc.cc
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+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+// }}}
+#include "ucoo/hal/adc/adc.hh"
+
+#include "ucoo/arch/arch.hh"
+#include "ucoo/base/test/test.hh"
+#include "ucoo/utils/delay.hh"
+
+#include <libopencm3/stm32/f4/adc.h>
+#include "ucoo/hal/gpio/gpio.hh"
+
+#include <cstdio>
+
+int
+main (int argc, const char **argv)
+{
+ ucoo::arch_init (argc, argv);
+ ucoo::test_stream_setup ();
+ // Have fun with temperature sensor.
+ ucoo::AdcHard adc (0);
+ adc.enable ();
+ ADC_CCR = ADC_CCR_TSVREFE;
+ ucoo::AdcHardChannel c (adc, 16);
+ while (1)
+ {
+ int r = c.read ();
+ std::printf ("ADC = %d\n", r);
+ ucoo::delay (0.5);
+ }
+}