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99 lines
3.1 KiB
99 lines
3.1 KiB
/* |
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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 BOSCH BMA180 MEMS accelerometer |
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*/ |
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/* IMPORTANT NOTES: |
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* |
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* SPI max. clock frequency: 25 Mhz |
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* CS has to be high before transfer, |
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* go low right before transfer and |
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* go high again right after transfer |
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* |
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*/ |
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#include <sys/ioctl.h> |
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#define _BMA180BASE 0x6300 |
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#define BMA180C(_x) _IOC(_BMA180BASE, _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 BMA180_SETRATE BMA180C(1) |
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#define BMA180_RATE_LP_10HZ (0<<4) |
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#define BMA180_RATE_LP_20HZ (1<<4) |
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#define BMA180_RATE_LP_40HZ (2<<4) |
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#define BMA180_RATE_LP_75HZ (3<<4) |
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#define BMA180_RATE_LP_150HZ (4<<4) |
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#define BMA180_RATE_LP_300HZ (5<<4) |
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#define BMA180_RATE_LP_600HZ (6<<4) |
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#define BMA180_RATE_LP_1200HZ (7<<4) |
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/* |
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* Sets the sensor internal range. |
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*/ |
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#define BMA180_SETRANGE BMA180C(2) |
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#define BMA180_RANGE_1G (0<<1) |
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#define BMA180_RANGE_1_5G (1<<1) |
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#define BMA180_RANGE_2G (2<<1) |
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#define BMA180_RANGE_3G (3<<1) |
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#define BMA180_RANGE_4G (4<<1) |
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#define BMA180_RANGE_8G (5<<1) |
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#define BMA180_RANGE_16G (6<<1) |
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/* |
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* Sets the address of a shared BMA180_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 BMA180_SETBUFFER BMA180C(3) |
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struct bma180_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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uint16_t x; |
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uint16_t y; |
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uint16_t z; |
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uint8_t temp; |
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} samples[]; |
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}; |
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extern int bma180_attach(struct spi_dev_s *spi, int spi_id);
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