mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
f38f32f6cc
* fixed some jamfile isssues for msb-430 * fixed arch32 detection for scheduler * changed sht11 driver to be platform independent
116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
/******************************************************************************
|
|
Copyright 2009, Freie Universitaet Berlin (FUB). All rights reserved.
|
|
|
|
These sources were developed at the Freie Universitaet Berlin, Computer Systems
|
|
and Telematics group (http://cst.mi.fu-berlin.de).
|
|
-------------------------------------------------------------------------------
|
|
This program is free software: you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free Software
|
|
Foundation, either version 3 of the License, or (at your option) any later
|
|
version.
|
|
|
|
FeuerWare is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see http://www.gnu.org/licenses/ .
|
|
--------------------------------------------------------------------------------
|
|
For further information and questions please use the web site
|
|
http://scatterweb.mi.fu-berlin.de
|
|
and the mailinglist (subscription via web site)
|
|
scatterweb@lists.spline.inf.fu-berlin.de
|
|
*******************************************************************************/
|
|
|
|
#ifndef SHT11_H_
|
|
#define SHT11_H_
|
|
|
|
/**
|
|
* @defgroup sht11 Sensirion SHT11 Driver
|
|
* @ingroup dev
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief SHT11 Device Driver
|
|
*
|
|
* @author Freie Universität Berlin, Computer Systems & Telematics, FeuerWhere project
|
|
* @version $Revision: 667 $
|
|
*
|
|
* @note $Id: sht11.h 667 2009-02-19 15:06:38Z baar $
|
|
*/
|
|
|
|
#define SHT11_NO_ACK (0)
|
|
#define SHT11_ACK (1)
|
|
//adr command r/w
|
|
#define SHT11_STATUS_REG_W (0x06) //000 0011 0
|
|
#define SHT11_STATUS_REG_R (0x07) //000 0011 1
|
|
#define SHT11_MEASURE_TEMP (0x03) //000 0001 1
|
|
#define SHT11_MEASURE_HUMI (0x05) //000 0010 1
|
|
#define SHT11_RESET (0x1E) //000 1111 0
|
|
|
|
/* time to wait after toggling the data line */
|
|
#define SHT11_DATA_WAIT (HWTIMER_TICKS(5))
|
|
/* time to wait after toggling the clock line */
|
|
#define SHT11_CLK_WAIT (HWTIMER_TICKS(1))
|
|
|
|
/* set measurement timeout to 1 second */
|
|
#define SHT11_MEASURE_TIMEOUT (1000)
|
|
|
|
/** sht11 measureable data */
|
|
typedef struct {
|
|
/* temperature value */
|
|
float temperature;
|
|
/* linear relative humidity */
|
|
float relhum;
|
|
/* temperature compensated relative humidity */
|
|
float relhum_temp;
|
|
} sht11_val_t;
|
|
|
|
/**
|
|
* @brief SHT11 modes that can be measured
|
|
*/
|
|
typedef enum {
|
|
TEMPERATURE = 1,
|
|
HUMIDITY = 2
|
|
} sht11_mode_t;
|
|
|
|
/**
|
|
* @brief Initialize SHT11 ports
|
|
*/
|
|
void sht11_init(void);
|
|
|
|
/**
|
|
* @brief Read sensor
|
|
*
|
|
* Example:
|
|
* \code struct sht11_val sht11;
|
|
* sht11_Read_Sensor(&sht11, HUMIDITY|TEMPERATURE);
|
|
* printf("%-6.2f °C %5.2f %% %5.2f %%\n", sht11.temperature, sht11.relhum, sht11.relhum_temp); \endcode
|
|
*/
|
|
uint8_t sht11_read_sensor(sht11_val_t *value, sht11_mode_t mode);
|
|
|
|
/**
|
|
* @brief Write status register
|
|
*
|
|
* @param p_value The value to write
|
|
*
|
|
* @return 1 on success, 0 otherwise
|
|
*/
|
|
uint8_t sht11_write_status(uint8_t *p_value);
|
|
|
|
/**
|
|
* @brief Read status register with checksum
|
|
*
|
|
* @param p_value The read value
|
|
* @param p_checksum The received checksum
|
|
*
|
|
* return 1 on success, 0 otherwise
|
|
*/
|
|
uint8_t sht11_read_status(uint8_t *p_value, uint8_t *p_checksum);
|
|
|
|
/** @} */
|
|
#endif /*SHT11_H_*/
|
|
|