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bertos/drv/tmp123.c

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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 2009 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief TMP123 Texas Intrument sensor temperature.
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ *
+ */
+
+#include "tmp123.h"
+
+#include "hw/hw_tmp123.h"
+
+#include <cfg/module.h>
+
+#include <cpu/byteorder.h>
+
+#include <io/kfile.h>
+
+#include <drv/ntc.h> // Macro and data type to manage celsius degree
+
+/**
+ * Read temperature from TMP123 chip.
+ */
+deg_t tmp123_read(KFile *fd)
+{
+	int16_t tmp;
+
+	TMP123_HW_CS_EN();
+	kfile_read(fd, &tmp, sizeof(tmp));
+	tmp = be16_to_cpu(tmp);
+	TMP123_HW_CS_DIS();
+
+	tmp >>= 3;
+	return DIV_ROUND((tmp * 10), 16);
+}
+/**
+ * Init module
+ */
+void tmp123_init(void)
+{
+	TMP123_HW_INIT();
+}
+
+