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bertos/drv/adc.h

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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \defgroup adc Generic ADC driver
+ * \ingroup drivers
+ * \{
+ * \brief Analog to Digital Converter driver (ADC).
+ *
+ * <b>Configuration file</b>: cfg_adc.h
+ *
+ * \author Francesco Sacchi <batt@develer.com>
+ *
+ * $WIZ$ module_name = "adc"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_adc.h"
+ * $WIZ$ module_supports = "not atmega103"
+ */
+
+
+#ifndef DRV_ADC_H
+#define DRV_ADC_H
+
+#include <cfg/compiler.h>
+#include <cfg/debug.h>
+#include <cpu/attr.h>
+#include CPU_HEADER(adc)
+
+/** Type for ADC return value. */
+typedef uint16_t adcread_t;
+
+/** Type for channel */
+typedef uint8_t adc_ch_t;
+
+#define adc_bits() ADC_BITS
+
+adcread_t adc_read(adc_ch_t ch);
+void adc_init(void);
+
+/**
+ * Macro used to convert data from adc range (0...(2 ^ADC_BITS - 1)) to
+ * \a y1 ... \a y2 range.
+ * \note \a y1, \a y2 can be negative, and put in ascending or descending order as well.
+ * \note \a data and \a y2 are evaluated only once, \a y1 twice.
+ */
+#define ADC_RANGECONV(data, y1, y2) (((((int32_t)(data)) * ((y2) - (y1))) / ((1 << ADC_BITS) - 1)) + (y1))
+
+/** \} */ //defgroup adc
+#endif /* DRV_ADC_H */