An i2c version of mbed LIS302 Accelerometer Library by sford, cstyles, wreynolds. The return data is raw yet. It seems from -0x55 to 0x55 though I think it returns -0x7F to 0x7F. Humm... Why?
LIS302i2c.h@0:4ef465f255d0, 2010-10-10 (annotated)
- Committer:
- kazushi2008
- Date:
- Sun Oct 10 06:17:08 2010 +0000
- Revision:
- 0:4ef465f255d0
the first version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kazushi2008 | 0:4ef465f255d0 | 1 | /* mbed LIS302 Accelerometer Library |
kazushi2008 | 0:4ef465f255d0 | 2 | * Copyright (c) 2008-2010, sford, cstyles, wreynolds |
kazushi2008 | 0:4ef465f255d0 | 3 | * modified for i2c version by Kazushi Mukaiyama 2010 |
kazushi2008 | 0:4ef465f255d0 | 4 | * |
kazushi2008 | 0:4ef465f255d0 | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
kazushi2008 | 0:4ef465f255d0 | 6 | * of this software and associated documentation files (the "Software"), to deal |
kazushi2008 | 0:4ef465f255d0 | 7 | * in the Software without restriction, including without limitation the rights |
kazushi2008 | 0:4ef465f255d0 | 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
kazushi2008 | 0:4ef465f255d0 | 9 | * copies of the Software, and to permit persons to whom the Software is |
kazushi2008 | 0:4ef465f255d0 | 10 | * furnished to do so, subject to the following conditions: |
kazushi2008 | 0:4ef465f255d0 | 11 | * |
kazushi2008 | 0:4ef465f255d0 | 12 | * The above copyright notice and this permission notice shall be included in |
kazushi2008 | 0:4ef465f255d0 | 13 | * all copies or substantial portions of the Software. |
kazushi2008 | 0:4ef465f255d0 | 14 | * |
kazushi2008 | 0:4ef465f255d0 | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
kazushi2008 | 0:4ef465f255d0 | 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
kazushi2008 | 0:4ef465f255d0 | 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
kazushi2008 | 0:4ef465f255d0 | 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
kazushi2008 | 0:4ef465f255d0 | 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
kazushi2008 | 0:4ef465f255d0 | 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
kazushi2008 | 0:4ef465f255d0 | 21 | * THE SOFTWARE. |
kazushi2008 | 0:4ef465f255d0 | 22 | */ |
kazushi2008 | 0:4ef465f255d0 | 23 | |
kazushi2008 | 0:4ef465f255d0 | 24 | #ifndef MBED_LIS302I2C_H |
kazushi2008 | 0:4ef465f255d0 | 25 | #define MBED_LIS302I2C_H |
kazushi2008 | 0:4ef465f255d0 | 26 | |
kazushi2008 | 0:4ef465f255d0 | 27 | #include "mbed.h" |
kazushi2008 | 0:4ef465f255d0 | 28 | |
kazushi2008 | 0:4ef465f255d0 | 29 | /** An interface for the LIS302 triple axis I2C accelerometer |
kazushi2008 | 0:4ef465f255d0 | 30 | * |
kazushi2008 | 0:4ef465f255d0 | 31 | * @code |
kazushi2008 | 0:4ef465f255d0 | 32 | * // Print out the Z axis acceleration |
kazushi2008 | 0:4ef465f255d0 | 33 | * #include "mbed.h" |
kazushi2008 | 0:4ef465f255d0 | 34 | * #include "LIS302i2c.h" |
kazushi2008 | 0:4ef465f255d0 | 35 | * |
kazushi2008 | 0:4ef465f255d0 | 36 | * LIS302i2c acc(p28, p27); // sda, scl |
kazushi2008 | 0:4ef465f255d0 | 37 | * |
kazushi2008 | 0:4ef465f255d0 | 38 | * int main() { |
kazushi2008 | 0:4ef465f255d0 | 39 | * while(1) { |
kazushi2008 | 0:4ef465f255d0 | 40 | * printf("Z axis acceleration = %.2f\n", acc.getZ()); |
kazushi2008 | 0:4ef465f255d0 | 41 | * wait(0.1); |
kazushi2008 | 0:4ef465f255d0 | 42 | * } |
kazushi2008 | 0:4ef465f255d0 | 43 | * } |
kazushi2008 | 0:4ef465f255d0 | 44 | * @endcode |
kazushi2008 | 0:4ef465f255d0 | 45 | */ |
kazushi2008 | 0:4ef465f255d0 | 46 | class LIS302i2c { |
kazushi2008 | 0:4ef465f255d0 | 47 | public: |
kazushi2008 | 0:4ef465f255d0 | 48 | |
kazushi2008 | 0:4ef465f255d0 | 49 | /** Create an LIS302 interface, connected to the specified pins |
kazushi2008 | 0:4ef465f255d0 | 50 | * |
kazushi2008 | 0:4ef465f255d0 | 51 | * @param sda I2C data line pin |
kazushi2008 | 0:4ef465f255d0 | 52 | * @param scl I2C clock line pin |
kazushi2008 | 0:4ef465f255d0 | 53 | */ |
kazushi2008 | 0:4ef465f255d0 | 54 | LIS302i2c(int addr, PinName sda, PinName scl); |
kazushi2008 | 0:4ef465f255d0 | 55 | |
kazushi2008 | 0:4ef465f255d0 | 56 | float x, y, z; |
kazushi2008 | 0:4ef465f255d0 | 57 | |
kazushi2008 | 0:4ef465f255d0 | 58 | void update(); |
kazushi2008 | 0:4ef465f255d0 | 59 | |
kazushi2008 | 0:4ef465f255d0 | 60 | /** Read the X axis acceleration |
kazushi2008 | 0:4ef465f255d0 | 61 | * |
kazushi2008 | 0:4ef465f255d0 | 62 | * @return A floating-point value representing acceleration in g |
kazushi2008 | 0:4ef465f255d0 | 63 | */ |
kazushi2008 | 0:4ef465f255d0 | 64 | float getX(); |
kazushi2008 | 0:4ef465f255d0 | 65 | |
kazushi2008 | 0:4ef465f255d0 | 66 | /** Read the Y axis acceleration |
kazushi2008 | 0:4ef465f255d0 | 67 | * |
kazushi2008 | 0:4ef465f255d0 | 68 | * @return A floating-point value representing acceleration in g |
kazushi2008 | 0:4ef465f255d0 | 69 | */ |
kazushi2008 | 0:4ef465f255d0 | 70 | float getY(); |
kazushi2008 | 0:4ef465f255d0 | 71 | |
kazushi2008 | 0:4ef465f255d0 | 72 | /** Read the Z axis acceleration |
kazushi2008 | 0:4ef465f255d0 | 73 | * |
kazushi2008 | 0:4ef465f255d0 | 74 | * @return - A floating-point value representing acceleration in g |
kazushi2008 | 0:4ef465f255d0 | 75 | */ |
kazushi2008 | 0:4ef465f255d0 | 76 | float getZ(); |
kazushi2008 | 0:4ef465f255d0 | 77 | |
kazushi2008 | 0:4ef465f255d0 | 78 | /** Select the range of the accelerometer |
kazushi2008 | 0:4ef465f255d0 | 79 | * |
kazushi2008 | 0:4ef465f255d0 | 80 | * @param range 0 = 2g, 1 = 8g |
kazushi2008 | 0:4ef465f255d0 | 81 | */ |
kazushi2008 | 0:4ef465f255d0 | 82 | void range(int g); |
kazushi2008 | 0:4ef465f255d0 | 83 | |
kazushi2008 | 0:4ef465f255d0 | 84 | /** Configure the minima and maxima for the axes to linearise the readings |
kazushi2008 | 0:4ef465f255d0 | 85 | * |
kazushi2008 | 0:4ef465f255d0 | 86 | * @param maxx float defining the maximum X value |
kazushi2008 | 0:4ef465f255d0 | 87 | * @param minx float defining the minimum X value |
kazushi2008 | 0:4ef465f255d0 | 88 | * @param maxy float defining the maximum Y value |
kazushi2008 | 0:4ef465f255d0 | 89 | * @param miny float defining the minimum Y value |
kazushi2008 | 0:4ef465f255d0 | 90 | * @param maxz float defining the maximum Z value |
kazushi2008 | 0:4ef465f255d0 | 91 | * @param minz float defining the minimum Z value |
kazushi2008 | 0:4ef465f255d0 | 92 | */ |
kazushi2008 | 0:4ef465f255d0 | 93 | void calibrate(float maxx = 1, float minx = -1, float maxy = 1, float miny = -1, float maxz = 1, float minz = -1); |
kazushi2008 | 0:4ef465f255d0 | 94 | |
kazushi2008 | 0:4ef465f255d0 | 95 | private: |
kazushi2008 | 0:4ef465f255d0 | 96 | I2C _i2c; |
kazushi2008 | 0:4ef465f255d0 | 97 | int _addr; |
kazushi2008 | 0:4ef465f255d0 | 98 | char _cmd[6]; |
kazushi2008 | 0:4ef465f255d0 | 99 | |
kazushi2008 | 0:4ef465f255d0 | 100 | char whoami(); |
kazushi2008 | 0:4ef465f255d0 | 101 | char status(); |
kazushi2008 | 0:4ef465f255d0 | 102 | |
kazushi2008 | 0:4ef465f255d0 | 103 | float _factor; |
kazushi2008 | 0:4ef465f255d0 | 104 | float _maxx, _minx; |
kazushi2008 | 0:4ef465f255d0 | 105 | float _maxy, _miny; |
kazushi2008 | 0:4ef465f255d0 | 106 | float _maxz, _minz; |
kazushi2008 | 0:4ef465f255d0 | 107 | }; |
kazushi2008 | 0:4ef465f255d0 | 108 | |
kazushi2008 | 0:4ef465f255d0 | 109 | #endif |