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77 lines
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77 lines
0 B
13 years ago
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/*
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* Copyright (C) 2012 Lorenz Meier. 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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of the author or the names of contributors may be
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* 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Driver for the Meas Spec MS5611 barometric pressure sensor
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*/
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#include <sys/ioctl.h>
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#define _MS5611BASE 0x6A00
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#define MS5611C(_x) _IOC(_MS5611BASE, _x)
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/*
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* Sets the sensor internal sampling rate, and if a buffer
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* has been configured, the rate at which entries will be
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* added to the buffer.
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*/
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#define MS5611_SETRATE MS5611C(1)
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/* set rate (configuration A register */
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#define MS5611_RATE_0_75HZ (0 << 2) /* 0.75 Hz */
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/*
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* Sets the sensor internal range.
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*/
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#define MS5611_SETRANGE MS5611C(2)
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#define MS5611_RANGE_0_88GA (0 << 5)
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/*
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* Sets the address of a shared MS5611_buffer
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* structure that is maintained by the driver.
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*
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* If zero is passed as the address, disables
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* the buffer updating.
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*/
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#define MS5611_SETBUFFER MS5611C(3)
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struct ms5611_buffer {
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uint32_t size; /* number of entries in the samples[] array */
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uint32_t next; /* the next entry that will be populated */
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struct {
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uint32_t pressure;
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uint16_t temperature;
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} samples[];
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};
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extern int ms5611_attach(struct i2c_dev_s *i2c);
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