mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-28 07:28:58 +00:00
Added "These names are deprecated, use C99 names" warnings the contiki-conf.h files that were missing it.
203 lines
5.8 KiB
C
203 lines
5.8 KiB
C
/*
|
|
* 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 "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 (uint8_t reg, uint16_t val)
|
|
{
|
|
uint8_t tx_buf[] = { reg, 0x00, 0x00 };
|
|
|
|
tx_buf[1] = (uint8_t) (val >> 8);
|
|
tx_buf[2] = (uint8_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 uint16_t
|
|
*/
|
|
|
|
uint16_t
|
|
tmp102_read_reg (uint8_t reg)
|
|
{
|
|
uint8_t buf[] = { 0x00, 0x00 };
|
|
uint16_t retVal = 0;
|
|
uint8_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 = (uint16_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
|
|
*/
|
|
|
|
uint16_t
|
|
tmp102_read_temp_raw (void)
|
|
{
|
|
uint16_t rd = 0;
|
|
|
|
rd = tmp102_read_reg (TMP102_TEMP);
|
|
|
|
return rd;
|
|
}
|
|
|
|
int16_t
|
|
tmp102_read_temp_x100(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;
|
|
} else {
|
|
abstemp = raw;
|
|
}
|
|
|
|
/* Integer part of the temperature value and percents*/
|
|
temp_int = (abstemp >> 8) * sign * 100;
|
|
temp_int += ((abstemp & 0xff) * 100) / 0x100;
|
|
|
|
/* 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
|
|
*/
|
|
|
|
return temp_int;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* 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)
|
|
{
|
|
return (int8_t) tmp102_read_temp_x100() / 100;
|
|
}
|