Initial Arduino IDE based on Processing.

build/shared/lib/avrlib/ds1631.c

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+/*! \file ds1631.c \brief Dallas DS1631 Temperature Sensor Driver Library. */
+//*****************************************************************************
+//
+// File Name	: 'ds1631.c'
+// Title		: Dallas DS1631 Temperature Sensor Driver Library
+// Author		: Pascal Stang - Copyright (C) 2004
+// Created		: 2004.02.10
+// Revised		: 2004.02.19
+// Version		: 0.1
+// Target MCU	: Atmel AVR Series
+// Editor Tabs	: 4
+//
+// NOTE: This code is currently below version 1.0, and therefore is considered
+// to be lacking in some functionality or documentation, or may not be fully
+// tested.  Nonetheless, you can expect most functions to work.
+//
+// This code is distributed under the GNU Public License
+//		which can be found at http://www.gnu.org/licenses/gpl.txt
+//
+//*****************************************************************************
+
+#include <avr/io.h>
+#include <avr/signal.h>
+#include <avr/interrupt.h>
+
+#include "global.h"
+#include "timer.h"
+#include "i2c.h"
+#include "ds1631.h"
+
+// global variables
+
+// Functions
+u08 ds1631Init(u08 i2cAddr)
+{
+	u08 chip_ok;
+	// issue a reset
+	if(ds1631Reset(i2cAddr) == I2C_OK)
+		chip_ok = TRUE;
+	else
+		chip_ok = FALSE;
+	// set a default configuration
+	// (1-shot mode, T_OUT active high, and 12-bit conversion)
+	ds1631SetConfig(i2cAddr,
+		DS1631_CONFIG_1SHOT | DS1631_CONFIG_POL |
+		DS1631_CONFIG_R0 | DS1631_CONFIG_R1);
+	return chip_ok;
+}
+
+u08 ds1631Reset(u08 i2cAddr)
+{
+	u08 buffer[1];
+	// return the DS1631 to power-on reset defaults
+	buffer[0] = DS1631_CMD_SWPOR;
+	return i2cMasterSendNI(i2cAddr, 1, buffer);
+}
+
+void ds1631SetConfig(u08 i2cAddr, u08 config)
+{
+	u08 buffer[2];
+	// write the DS1631 configuration byte
+	buffer[0] = DS1631_CMD_ACCESSCONFIG;
+	buffer[1] = config;
+	i2cMasterSendNI(i2cAddr, 2, buffer);
+}
+
+u08 ds1631GetConfig(u08 i2cAddr)
+{
+	u08 buffer[1];
+	// write the DS1631 configuration byte
+	buffer[0] = DS1631_CMD_ACCESSCONFIG;
+	i2cMasterSendNI(i2cAddr, 2, buffer);
+	i2cMasterReceiveNI(i2cAddr, 2, buffer);
+	return buffer[0];
+}
+
+void ds1631StartConvert(u08 i2cAddr)
+{
+	u08 buffer[1];
+	// send the DS1631 Start Convert command
+	buffer[0] = DS1631_CMD_STARTCONV;
+	i2cMasterSendNI(i2cAddr, 1, buffer);
+}
+
+void ds1631StopConvert(u08 i2cAddr)
+{
+	u08 buffer[1];
+	// send the DS1631 Stop Convert command
+	buffer[0] = DS1631_CMD_STOPCONV;
+	i2cMasterSendNI(i2cAddr, 1, buffer);
+}
+
+s16 ds1631ReadTemp(u08 i2cAddr)
+{
+	// read the Temperature register and return the result
+	return ds1631ReadTempReg(i2cAddr, DS1631_CMD_READTEMP);
+}
+
+void ds1631SetTH(u08 i2cAddr, s16 value)
+{
+	// write the TH register
+	ds1631WriteTempReg(i2cAddr, DS1631_CMD_ACCESSTH, value);
+}
+
+void ds1631SetTL(u08 i2cAddr, s16 value)
+{
+	// write the TL register
+	ds1631WriteTempReg(i2cAddr, DS1631_CMD_ACCESSTL, value);
+}
+
+s16 ds1631GetTH(u08 i2cAddr)
+{
+	// read the TH register and return the result
+	return ds1631ReadTempReg(i2cAddr, DS1631_CMD_ACCESSTH);
+}
+
+s16 ds1631GetTL(u08 i2cAddr)
+{
+	// read the TL register and return the result
+	return ds1631ReadTempReg(i2cAddr, DS1631_CMD_ACCESSTL);
+}
+
+
+s16 ds1631ReadTempReg(u08 i2cAddr, u08 cmd)
+{
+	u08 buffer[2];
+	s16 T;
+
+	// read the temperature value from the requested register
+	i2cMasterSendNI(i2cAddr, 1, &cmd);
+	i2cMasterReceiveNI(i2cAddr, 2, buffer);
+	// pack bytes
+	T = (s16)((buffer[0]<<8) | buffer[1]);
+	// return result
+	return T;
+}
+
+void ds1631WriteTempReg(u08 i2cAddr, u08 cmd, s16 value)
+{
+	u08 buffer[3];
+
+	// write the requested register with a temperature value
+	buffer[0] = cmd;
+	buffer[1] = value>>8;
+	buffer[2] = value;
+	i2cMasterSendNI(i2cAddr, 3, buffer);
+}