mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 16:29:34 +00:00
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2015, Zolertia - http://www.zolertia.com
|
|
* 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.
|
|
*
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \addtogroup zoul-tmp102-sensor
|
|
* @{
|
|
*
|
|
* \file
|
|
* Driver for the TMP102 temperature sensor
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
#include <stdio.h>
|
|
#include "contiki.h"
|
|
#include "dev/i2c.h"
|
|
#include "tmp102.h"
|
|
|
|
void
|
|
tmp102_init(void)
|
|
{
|
|
i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN, I2C_SCL_NORMAL_BUS_SPEED);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
uint8_t
|
|
tmp102_read(uint16_t *data)
|
|
{
|
|
uint8_t buf[2];
|
|
uint16_t temp;
|
|
|
|
/* Write to the temperature register to trigger a reading */
|
|
if(i2c_single_send(TMP102_ADDR, TMP102_TEMP) == I2C_MASTER_ERR_NONE) {
|
|
/* Read two bytes only */
|
|
if(i2c_burst_receive(TMP102_ADDR, buf, 2) == I2C_MASTER_ERR_NONE) {
|
|
temp = (buf[0] << 8) + buf[1];
|
|
if(temp > 2047) {
|
|
temp -= (1 << 12);
|
|
}
|
|
temp *= 0.625;
|
|
*data = temp;
|
|
return I2C_MASTER_ERR_NONE;
|
|
}
|
|
}
|
|
return i2c_master_error();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|