SCA3000 triple axis digital interface accelerometer
SCA3000.h@1:f5f2e79304fb, 2011-06-09 (annotated)
- Committer:
- aberk
- Date:
- Thu Jun 09 14:29:16 2011 +0000
- Revision:
- 1:f5f2e79304fb
- Parent:
- 0:fe041345c169
Added functionality for getting the acceleration values in raw counts as opposed to milli-gs.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
aberk | 0:fe041345c169 | 1 | /** |
aberk | 0:fe041345c169 | 2 | * @author Aaron Berk |
aberk | 0:fe041345c169 | 3 | * |
aberk | 0:fe041345c169 | 4 | * @section LICENSE |
aberk | 0:fe041345c169 | 5 | * |
aberk | 0:fe041345c169 | 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
aberk | 0:fe041345c169 | 7 | * of this software and associated documentation files (the "Software"), to deal |
aberk | 0:fe041345c169 | 8 | * in the Software without restriction, including without limitation the rights |
aberk | 0:fe041345c169 | 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
aberk | 0:fe041345c169 | 10 | * copies of the Software, and to permit persons to whom the Software is |
aberk | 0:fe041345c169 | 11 | * furnished to do so, subject to the following conditions: |
aberk | 0:fe041345c169 | 12 | * |
aberk | 0:fe041345c169 | 13 | * The above copyright notice and this permission notice shall be included in |
aberk | 0:fe041345c169 | 14 | * all copies or substantial portions of the Software. |
aberk | 0:fe041345c169 | 15 | * |
aberk | 0:fe041345c169 | 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
aberk | 0:fe041345c169 | 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
aberk | 0:fe041345c169 | 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
aberk | 0:fe041345c169 | 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
aberk | 0:fe041345c169 | 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
aberk | 0:fe041345c169 | 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
aberk | 0:fe041345c169 | 22 | * THE SOFTWARE. |
aberk | 0:fe041345c169 | 23 | * |
aberk | 0:fe041345c169 | 24 | * @section DESCRIPTION |
aberk | 0:fe041345c169 | 25 | * |
aberk | 0:fe041345c169 | 26 | * SCA3000, triple axis, digital interface, accelerometer. |
aberk | 0:fe041345c169 | 27 | * |
aberk | 0:fe041345c169 | 28 | * Datasheet: |
aberk | 0:fe041345c169 | 29 | * |
aberk | 0:fe041345c169 | 30 | * http://www.sparkfun.com/datasheets/Sensors/Accelerometer/SCA3000-D01.pdf |
aberk | 0:fe041345c169 | 31 | */ |
aberk | 0:fe041345c169 | 32 | |
aberk | 0:fe041345c169 | 33 | #ifndef MBED_SCA3000_H |
aberk | 0:fe041345c169 | 34 | #define MBED_SCA3000_H |
aberk | 0:fe041345c169 | 35 | |
aberk | 0:fe041345c169 | 36 | /** |
aberk | 0:fe041345c169 | 37 | * Includes |
aberk | 0:fe041345c169 | 38 | */ |
aberk | 0:fe041345c169 | 39 | #include "mbed.h" |
aberk | 0:fe041345c169 | 40 | |
aberk | 0:fe041345c169 | 41 | /** |
aberk | 0:fe041345c169 | 42 | * Defines |
aberk | 0:fe041345c169 | 43 | */ |
aberk | 0:fe041345c169 | 44 | //Registers. |
aberk | 0:fe041345c169 | 45 | #define SCA3000_REVID_REG 0x00 |
aberk | 0:fe041345c169 | 46 | #define SCA3000_STATUS_REG 0x02 |
aberk | 0:fe041345c169 | 47 | #define SCA3000_X_LSB 0x04 |
aberk | 0:fe041345c169 | 48 | #define SCA3000_X_MSB 0x05 |
aberk | 0:fe041345c169 | 49 | #define SCA3000_Y_LSB 0x06 |
aberk | 0:fe041345c169 | 50 | #define SCA3000_Y_MSB 0x07 |
aberk | 0:fe041345c169 | 51 | #define SCA3000_Z_LSB 0x08 |
aberk | 0:fe041345c169 | 52 | #define SCA3000_Z_MSB 0x09 |
aberk | 0:fe041345c169 | 53 | |
aberk | 0:fe041345c169 | 54 | #define SCA3000_SPI_READ 0x00 |
aberk | 0:fe041345c169 | 55 | #define SCA3000_SPI_WRITE 0x02 |
aberk | 0:fe041345c169 | 56 | |
aberk | 0:fe041345c169 | 57 | #define SCA3000_X_AXIS 0x00 |
aberk | 0:fe041345c169 | 58 | #define SCA3000_Y_AXIS 0x01 |
aberk | 0:fe041345c169 | 59 | #define SCA3000_Z_AXIS 0x02 |
aberk | 0:fe041345c169 | 60 | |
aberk | 0:fe041345c169 | 61 | /** |
aberk | 0:fe041345c169 | 62 | * SCA3000, triple axis, digital interface, accelerometer. |
aberk | 0:fe041345c169 | 63 | */ |
aberk | 0:fe041345c169 | 64 | class SCA3000 { |
aberk | 0:fe041345c169 | 65 | |
aberk | 0:fe041345c169 | 66 | public: |
aberk | 0:fe041345c169 | 67 | |
aberk | 0:fe041345c169 | 68 | /** |
aberk | 0:fe041345c169 | 69 | * Constructor. |
aberk | 0:fe041345c169 | 70 | * |
aberk | 0:fe041345c169 | 71 | * @param mosi mbed pin to use for MOSI line of SPI interface. |
aberk | 0:fe041345c169 | 72 | * @param miso mbed pin to use for MISO line of SPI interface. |
aberk | 0:fe041345c169 | 73 | * @param sck mbed pin to use for SCK line of SPI interface. |
aberk | 0:fe041345c169 | 74 | * @param cs mbed pin to use for not chip select line of SPI interface. |
aberk | 0:fe041345c169 | 75 | * @param nr mbed pin to use for the not reset line. |
aberk | 0:fe041345c169 | 76 | */ |
aberk | 0:fe041345c169 | 77 | SCA3000(PinName mosi, PinName miso, PinName sck, PinName cs, PinName nr); |
aberk | 0:fe041345c169 | 78 | |
aberk | 0:fe041345c169 | 79 | /** |
aberk | 0:fe041345c169 | 80 | * Read the revision ID register on the device. |
aberk | 0:fe041345c169 | 81 | * |
aberk | 0:fe041345c169 | 82 | * @return The revision ID number. |
aberk | 0:fe041345c169 | 83 | */ |
aberk | 0:fe041345c169 | 84 | int getRevId(void); |
aberk | 0:fe041345c169 | 85 | |
aberk | 0:fe041345c169 | 86 | /** |
aberk | 0:fe041345c169 | 87 | * Get the register contents acceleration value for the |
aberk | 1:f5f2e79304fb | 88 | * given axis, using the nominal sensitivity values |
aberk | 1:f5f2e79304fb | 89 | * found in the datasheet. |
aberk | 0:fe041345c169 | 90 | * |
aberk | 0:fe041345c169 | 91 | * @param axis The axis to get acceleration values for. |
aberk | 0:fe041345c169 | 92 | * |
aberk | 0:fe041345c169 | 93 | * @return The acceleration on the specified axis in mg. |
aberk | 0:fe041345c169 | 94 | */ |
aberk | 0:fe041345c169 | 95 | float getAcceleration(int axis); |
aberk | 1:f5f2e79304fb | 96 | |
aberk | 1:f5f2e79304fb | 97 | /** |
aberk | 1:f5f2e79304fb | 98 | * Get the register contents acceleration value for the |
aberk | 1:f5f2e79304fb | 99 | * given axis, in counts. |
aberk | 1:f5f2e79304fb | 100 | * |
aberk | 1:f5f2e79304fb | 101 | * @param axis The axis to get the counts values for. |
aberk | 1:f5f2e79304fb | 102 | * |
aberk | 1:f5f2e79304fb | 103 | * @return The acceleration on the specified axis in counts. |
aberk | 1:f5f2e79304fb | 104 | */ |
aberk | 1:f5f2e79304fb | 105 | int getCounts(int axis); |
aberk | 0:fe041345c169 | 106 | |
aberk | 0:fe041345c169 | 107 | private: |
aberk | 0:fe041345c169 | 108 | |
aberk | 0:fe041345c169 | 109 | SPI spi_; |
aberk | 0:fe041345c169 | 110 | DigitalOut nCS_; |
aberk | 0:fe041345c169 | 111 | DigitalOut nR_; |
aberk | 0:fe041345c169 | 112 | |
aberk | 0:fe041345c169 | 113 | /** |
aberk | 0:fe041345c169 | 114 | * Read one byte from a register on the device. |
aberk | 0:fe041345c169 | 115 | * |
aberk | 0:fe041345c169 | 116 | * @param address Address of the register to read. |
aberk | 0:fe041345c169 | 117 | * |
aberk | 0:fe041345c169 | 118 | * @return The contents of the register address. |
aberk | 0:fe041345c169 | 119 | */ |
aberk | 0:fe041345c169 | 120 | int oneByteRead(int address); |
aberk | 0:fe041345c169 | 121 | |
aberk | 0:fe041345c169 | 122 | /** |
aberk | 0:fe041345c169 | 123 | * Write one byte to a register on the device. |
aberk | 0:fe041345c169 | 124 | * |
aberk | 0:fe041345c169 | 125 | * @param address Address of the register to write to. |
aberk | 0:fe041345c169 | 126 | * @param data The data to write into the register. |
aberk | 0:fe041345c169 | 127 | */ |
aberk | 0:fe041345c169 | 128 | void oneByteWrite(int address, char data); |
aberk | 0:fe041345c169 | 129 | |
aberk | 0:fe041345c169 | 130 | }; |
aberk | 0:fe041345c169 | 131 | |
aberk | 0:fe041345c169 | 132 | #endif /* MBED_SCA3000_H */ |