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Added device drivers for tmp102 sensor for the Zolertia Z1 platform.

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enricmcalvo 2011-01-20 10:28:00 +00:00
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platform/z1/dev/tmp102.c Normal file
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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Device drivers for tmp102 temperature sensor in Zolertia Z1.
* \author
* Enric M. Calvo, Zolertia <ecalvo@zolertia.com>
* Marcus Lundén, SICS <mlunden@sics.se>
*/
#include <stdio.h>
#include <signal.h>
#include "contiki.h"
#include "i2cmaster.h"
#include "tmp102.h"
/* Bitmasks and bit flag variable for keeping track of tmp102 status. */
enum TMP102_STATUSTYPES
{
/* must be a bit and not more, not using 0x00. */
INITED = 0x01,
RUNNING = 0x02,
STOPPED = 0x04,
LOW_POWER = 0x08,
AAA = 0x10, // available to extend this...
BBB = 0x20, // available to extend this...
CCC = 0x40, // available to extend this...
DDD = 0x80 // available to extend this...
};
static enum TMP102_STATUSTYPES _TMP102_STATUS = 0x00;
/*---------------------------------------------------------------------------*/
//PROCESS(tmp102_process, "Temperature Sensor process");
/*---------------------------------------------------------------------------*/
/* Init the temperature sensor: ports, pins, registers, interrupts (none enabled), I2C,
default threshold values etc. */
void
tmp102_init (void)
{
if (!(_TMP102_STATUS & INITED))
{
PRINTFDEBUG ("TMP102 init\n");
_TMP102_STATUS |= INITED;
/* Power Up TMP102 via pin */
TMP102_PWR_DIR |= TMP102_PWR_PIN;
TMP102_PWR_SEL &= ~TMP102_PWR_SEL;
TMP102_PWR_SEL2 &= ~TMP102_PWR_SEL;
TMP102_PWR_REN &= ~TMP102_PWR_SEL;
TMP102_PWR_OUT |= TMP102_PWR_PIN;
/* Set up ports and pins for I2C communication */
i2c_enable ();
}
}
/*---------------------------------------------------------------------------*/
/* Write to a 16-bit register.
args:
reg register to write to
val value to write
*/
void
tmp102_write_reg (u8_t reg, u16_t val)
{
u8_t tx_buf[] = { reg, 0x00, 0x00 };
tx_buf[1] = (u8_t) (val >> 8);
tx_buf[2] = (u8_t) (val & 0x00FF);
i2c_transmitinit (TMP102_ADDR);
while (i2c_busy ());
PRINTFDEBUG ("I2C Ready to TX\n");
i2c_transmit_n (3, tx_buf);
while (i2c_busy ());
PRINTFDEBUG ("WRITE_REG 0x%04X @ reg 0x%02X\n", val, reg);
}
/*---------------------------------------------------------------------------*/
/* Read register.
args:
reg what register to read
returns the value of the read register type u16_t
*/
u16_t
tmp102_read_reg (u8_t reg)
{
u8_t buf[] = { 0x00, 0x00 };
u16_t retVal = 0;
u8_t rtx = reg;
PRINTFDEBUG ("READ_REG 0x%02X\n", reg);
// transmit the register to read
i2c_transmitinit (TMP102_ADDR);
while (i2c_busy ());
i2c_transmit_n (1, &rtx);
while (i2c_busy ());
// receive the data
i2c_receiveinit (TMP102_ADDR);
while (i2c_busy ());
i2c_receive_n (2, &buf[0]);
while (i2c_busy ());
retVal = (u16_t) (buf[0] << 8 | (buf[1]));
return retVal;
}
/*---------------------------------------------------------------------------*/
/* Read temperature in a raw format. Further processing will be needed
to make an interpretation of these 12 or 13-bit data, depending on configuration
*/
u16_t
tmp102_read_temp_raw (void)
{
u16_t rd = 0;
rd = tmp102_read_reg (TMP102_TEMP);
return rd;
}
/*---------------------------------------------------------------------------*/
/* Simple Read temperature. Return is an integer with temperature in 1deg. precision
Return value is a signed 8 bit integer.
*/
int8_t
tmp102_read_temp_simple (void)
{
int16_t raw = 0;
int8_t rd = 0;
int16_t sign = 1;
int16_t abstemp, temp_int;
raw = (int16_t) tmp102_read_reg (TMP102_TEMP);
if (raw < 0)
{
abstemp = (raw ^ 0xFFFF) + 1;
sign = -1;
}
/* Integer part of the temperature value */
temp_int = (abstemp >> 8) * sign;
/* See test-tmp102.c on how to print values of temperature with decimals
fractional part in 1/10000 of degree
temp_frac = ((abstemp >>4) % 16) * 625;
Data could be multiplied by 63 to have less bit-growth and 1/1000 precision
Data could be multiplied by 64 (<< 6) to trade-off precision for speed
*/
rd = (int8_t) (temp_int);
return rd;
}

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* Device drivers header file for tmp102 temperature sensor in Zolertia Z1 WSN Platform.
* \author
* Enric M. Calvo, Zolertia <ecalvo@zolertia.com>
* Marcus Lundén, SICS <mlunden@sics.se>
*/
#ifndef __TMP102_H__
#define __TMP102_H__
#include <stdio.h>
#include "i2cmaster.h"
/* -------------------------------------------------------------------------- */
/* Init the temperature sensor: ports, pins, I2C, interrupts (XXX none so far),
*/
void tmp102_init(void);
/* Write to a register.
args:
reg register to write to
val value to write
*/
void tmp102_write_reg(u8_t reg, u16_t val);
/* Read one register.
args:
reg what register to read
returns the value of the read register
*/
u16_t tmp102_read_reg(u8_t reg);
/* Read temperature in raw format
no args needed
*/
u16_t tmp102_read_temp_raw();
/* Read only integer part of the temperature in 1deg. precision.
no args needed
*/
int8_t tmp102_read_temp_simple();
/* -------------------------------------------------------------------------- */
/* Reference definitions */
/* TMP102 slave address */
#define TMP102_ADDR 0x48
/* TMP102 registers */
#define TMP102_TEMP 0x00 // read only
#define TMP102_CONF 0x01
#define TMP102_TLOW 0x02
#define TMP102_THIGH 0x03
/* TMP102 Ports */
/* Accelerometer hardware ports, pins and registers on the msp430 µC */
#define TMP102_PWR_DIR P5DIR
#define TMP102_PWR_SEL P5SEL
#define TMP102_PWR_SEL2 P5SEL2
#define TMP102_PWR_REN P5REN
#define TMP102_PWR_OUT P5OUT
#define TMP102_PWR_PIN (1<<0) // P5.0
//#define TMP102_INT_PIN (1<<7) // P1.7
/* -------------------------------------------------------------------------- */
#endif /* ifndef __TMP102_H__ */