4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
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24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
30 * All Rights Reserved.
33 * \brief Some ADC utilis.
35 * \author Daniele Basile <asterix@develer.com>
45 * Enable temperature sensor
47 INLINE void hw_enableTempRead(void)
50 ADC_ACR = BV(ADC_TSON);
55 * The VT voltage equals 0.8V at 27°C with a +/-15% accuracy.
56 * The VT output voltage linearly varies with a temperature slope dVT/dT = 2.65.
57 * So the formula is: x = (vol - 800) / 2.65 + 27.
59 INLINE uint16_t hw_convertToDegree(uint16_t raw_temp)
61 raw_temp = raw_temp * 3300 * 10 / 4096;
62 return ((raw_temp - 8000) * 100 / 265 + 270);