Added device drivers for tmp102 sensor for the Zolertia Z1 platform.
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enricmcalvo
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199
platform/z1/dev/tmp102.c
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199
platform/z1/dev/tmp102.c
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/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Device drivers for tmp102 temperature sensor in Zolertia Z1.
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* \author
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* Enric M. Calvo, Zolertia <ecalvo@zolertia.com>
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* Marcus Lundén, SICS <mlunden@sics.se>
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*/
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#include <stdio.h>
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#include <signal.h>
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#include "contiki.h"
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#include "i2cmaster.h"
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#include "tmp102.h"
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/* Bitmasks and bit flag variable for keeping track of tmp102 status. */
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enum TMP102_STATUSTYPES
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{
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/* must be a bit and not more, not using 0x00. */
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INITED = 0x01,
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RUNNING = 0x02,
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STOPPED = 0x04,
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LOW_POWER = 0x08,
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AAA = 0x10, // available to extend this...
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BBB = 0x20, // available to extend this...
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CCC = 0x40, // available to extend this...
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DDD = 0x80 // available to extend this...
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};
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static enum TMP102_STATUSTYPES _TMP102_STATUS = 0x00;
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/*---------------------------------------------------------------------------*/
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//PROCESS(tmp102_process, "Temperature Sensor process");
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/*---------------------------------------------------------------------------*/
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/* Init the temperature sensor: ports, pins, registers, interrupts (none enabled), I2C,
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default threshold values etc. */
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void
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tmp102_init (void)
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{
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if (!(_TMP102_STATUS & INITED))
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{
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PRINTFDEBUG ("TMP102 init\n");
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_TMP102_STATUS |= INITED;
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/* Power Up TMP102 via pin */
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TMP102_PWR_DIR |= TMP102_PWR_PIN;
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TMP102_PWR_SEL &= ~TMP102_PWR_SEL;
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TMP102_PWR_SEL2 &= ~TMP102_PWR_SEL;
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TMP102_PWR_REN &= ~TMP102_PWR_SEL;
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TMP102_PWR_OUT |= TMP102_PWR_PIN;
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/* Set up ports and pins for I2C communication */
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i2c_enable ();
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}
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}
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/*---------------------------------------------------------------------------*/
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/* Write to a 16-bit register.
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args:
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reg register to write to
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val value to write
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*/
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void
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tmp102_write_reg (u8_t reg, u16_t val)
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{
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u8_t tx_buf[] = { reg, 0x00, 0x00 };
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tx_buf[1] = (u8_t) (val >> 8);
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tx_buf[2] = (u8_t) (val & 0x00FF);
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i2c_transmitinit (TMP102_ADDR);
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while (i2c_busy ());
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PRINTFDEBUG ("I2C Ready to TX\n");
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i2c_transmit_n (3, tx_buf);
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while (i2c_busy ());
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PRINTFDEBUG ("WRITE_REG 0x%04X @ reg 0x%02X\n", val, reg);
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}
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/*---------------------------------------------------------------------------*/
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/* Read register.
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args:
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reg what register to read
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returns the value of the read register type u16_t
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*/
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u16_t
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tmp102_read_reg (u8_t reg)
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{
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u8_t buf[] = { 0x00, 0x00 };
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u16_t retVal = 0;
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u8_t rtx = reg;
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PRINTFDEBUG ("READ_REG 0x%02X\n", reg);
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// transmit the register to read
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i2c_transmitinit (TMP102_ADDR);
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while (i2c_busy ());
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i2c_transmit_n (1, &rtx);
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while (i2c_busy ());
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// receive the data
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i2c_receiveinit (TMP102_ADDR);
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while (i2c_busy ());
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i2c_receive_n (2, &buf[0]);
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while (i2c_busy ());
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retVal = (u16_t) (buf[0] << 8 | (buf[1]));
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return retVal;
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}
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/*---------------------------------------------------------------------------*/
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/* Read temperature in a raw format. Further processing will be needed
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to make an interpretation of these 12 or 13-bit data, depending on configuration
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*/
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u16_t
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tmp102_read_temp_raw (void)
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{
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u16_t rd = 0;
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rd = tmp102_read_reg (TMP102_TEMP);
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return rd;
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}
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/*---------------------------------------------------------------------------*/
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/* Simple Read temperature. Return is an integer with temperature in 1deg. precision
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Return value is a signed 8 bit integer.
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*/
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int8_t
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tmp102_read_temp_simple (void)
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{
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int16_t raw = 0;
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int8_t rd = 0;
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int16_t sign = 1;
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int16_t abstemp, temp_int;
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raw = (int16_t) tmp102_read_reg (TMP102_TEMP);
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if (raw < 0)
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{
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abstemp = (raw ^ 0xFFFF) + 1;
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sign = -1;
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}
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/* Integer part of the temperature value */
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temp_int = (abstemp >> 8) * sign;
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/* See test-tmp102.c on how to print values of temperature with decimals
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fractional part in 1/10000 of degree
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temp_frac = ((abstemp >>4) % 16) * 625;
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Data could be multiplied by 63 to have less bit-growth and 1/1000 precision
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Data could be multiplied by 64 (<< 6) to trade-off precision for speed
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*/
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rd = (int8_t) (temp_int);
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return rd;
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}
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101
platform/z1/dev/tmp102.h
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101
platform/z1/dev/tmp102.h
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@ -0,0 +1,101 @@
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/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Device drivers header file for tmp102 temperature sensor in Zolertia Z1 WSN Platform.
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* \author
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* Enric M. Calvo, Zolertia <ecalvo@zolertia.com>
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* Marcus Lundén, SICS <mlunden@sics.se>
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*/
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#ifndef __TMP102_H__
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#define __TMP102_H__
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#include <stdio.h>
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#include "i2cmaster.h"
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/* -------------------------------------------------------------------------- */
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/* Init the temperature sensor: ports, pins, I2C, interrupts (XXX none so far),
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*/
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void tmp102_init(void);
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/* Write to a register.
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args:
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reg register to write to
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val value to write
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*/
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void tmp102_write_reg(u8_t reg, u16_t val);
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/* Read one register.
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args:
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reg what register to read
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returns the value of the read register
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*/
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u16_t tmp102_read_reg(u8_t reg);
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/* Read temperature in raw format
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no args needed
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*/
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u16_t tmp102_read_temp_raw();
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/* Read only integer part of the temperature in 1deg. precision.
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no args needed
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*/
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int8_t tmp102_read_temp_simple();
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/* -------------------------------------------------------------------------- */
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/* Reference definitions */
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/* TMP102 slave address */
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#define TMP102_ADDR 0x48
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/* TMP102 registers */
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#define TMP102_TEMP 0x00 // read only
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#define TMP102_CONF 0x01
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#define TMP102_TLOW 0x02
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#define TMP102_THIGH 0x03
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/* TMP102 Ports */
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/* Accelerometer hardware ports, pins and registers on the msp430 µC */
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#define TMP102_PWR_DIR P5DIR
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#define TMP102_PWR_SEL P5SEL
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#define TMP102_PWR_SEL2 P5SEL2
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#define TMP102_PWR_REN P5REN
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#define TMP102_PWR_OUT P5OUT
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#define TMP102_PWR_PIN (1<<0) // P5.0
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//#define TMP102_INT_PIN (1<<7) // P1.7
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/* -------------------------------------------------------------------------- */
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#endif /* ifndef __TMP102_H__ */
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