A feature complete driver for the LM75B temperature sensor from NXP.
Fork of LM75B by
LM75B.h@1:3da8df4319e8, 2013-07-31 (annotated)
- Committer:
- neilt6
- Date:
- Wed Jul 31 22:11:31 2013 +0000
- Revision:
- 1:3da8df4319e8
- Parent:
- 0:557a92280097
- Child:
- 2:9ecc39b2ca70
Updated license to MIT
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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neilt6 | 1:3da8df4319e8 | 1 | /* Copyright (c) 2013 Neil Thiessen, MIT License |
neilt6 | 0:557a92280097 | 2 | * |
neilt6 | 1:3da8df4319e8 | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
neilt6 | 1:3da8df4319e8 | 4 | * and associated documentation files (the "Software"), to deal in the Software without restriction, |
neilt6 | 1:3da8df4319e8 | 5 | * including without limitation the rights to use, copy, modify, merge, publish, distribute, |
neilt6 | 1:3da8df4319e8 | 6 | * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is |
neilt6 | 0:557a92280097 | 7 | * furnished to do so, subject to the following conditions: |
neilt6 | 0:557a92280097 | 8 | * |
neilt6 | 1:3da8df4319e8 | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
neilt6 | 1:3da8df4319e8 | 10 | * substantial portions of the Software. |
neilt6 | 0:557a92280097 | 11 | * |
neilt6 | 1:3da8df4319e8 | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
neilt6 | 1:3da8df4319e8 | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
neilt6 | 1:3da8df4319e8 | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
neilt6 | 1:3da8df4319e8 | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
neilt6 | 1:3da8df4319e8 | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
neilt6 | 0:557a92280097 | 17 | */ |
neilt6 | 0:557a92280097 | 18 | |
neilt6 | 0:557a92280097 | 19 | #ifndef LM75B_H |
neilt6 | 0:557a92280097 | 20 | #define LM75B_H |
neilt6 | 0:557a92280097 | 21 | |
neilt6 | 0:557a92280097 | 22 | #include "mbed.h" |
neilt6 | 0:557a92280097 | 23 | |
neilt6 | 0:557a92280097 | 24 | //i2c address definitions |
neilt6 | 0:557a92280097 | 25 | #define LM75B_A0 (0x48 << 1) |
neilt6 | 0:557a92280097 | 26 | #define LM75B_A1 (0x49 << 1) |
neilt6 | 0:557a92280097 | 27 | #define LM75B_A2 (0x4A << 1) |
neilt6 | 0:557a92280097 | 28 | #define LM75B_A3 (0x4B << 1) |
neilt6 | 0:557a92280097 | 29 | #define LM75B_A4 (0x4C << 1) |
neilt6 | 0:557a92280097 | 30 | #define LM75B_A5 (0x4D << 1) |
neilt6 | 0:557a92280097 | 31 | #define LM75B_A6 (0x4E << 1) |
neilt6 | 0:557a92280097 | 32 | #define LM75B_A7 (0x4F << 1) |
neilt6 | 0:557a92280097 | 33 | |
neilt6 | 0:557a92280097 | 34 | //i2c register definitions |
neilt6 | 0:557a92280097 | 35 | #define LM75B_REG_TEMP 0x00 |
neilt6 | 0:557a92280097 | 36 | #define LM75B_REG_CONF 0x01 |
neilt6 | 0:557a92280097 | 37 | #define LM75B_REG_THYST 0x02 |
neilt6 | 0:557a92280097 | 38 | #define LM75B_REG_TOS 0x03 |
neilt6 | 0:557a92280097 | 39 | |
neilt6 | 0:557a92280097 | 40 | //Power mode enumeration |
neilt6 | 0:557a92280097 | 41 | typedef enum { |
neilt6 | 0:557a92280097 | 42 | LM75B_Power_Normal, |
neilt6 | 0:557a92280097 | 43 | LM75B_Power_Shutdown |
neilt6 | 0:557a92280097 | 44 | } LM75B_Power_t; |
neilt6 | 0:557a92280097 | 45 | |
neilt6 | 0:557a92280097 | 46 | //OS mode enumeration |
neilt6 | 0:557a92280097 | 47 | typedef enum { |
neilt6 | 0:557a92280097 | 48 | LM75B_OS_Comparator, |
neilt6 | 0:557a92280097 | 49 | LM75B_OS_Interrupt |
neilt6 | 0:557a92280097 | 50 | } LM75B_OS_Mode_t; |
neilt6 | 0:557a92280097 | 51 | |
neilt6 | 0:557a92280097 | 52 | //OS polarity enumeration |
neilt6 | 0:557a92280097 | 53 | typedef enum { |
neilt6 | 0:557a92280097 | 54 | LM75B_OS_ActiveLow, |
neilt6 | 0:557a92280097 | 55 | LM75B_OS_ActiveHigh |
neilt6 | 0:557a92280097 | 56 | } LM75B_OS_Polarity_t; |
neilt6 | 0:557a92280097 | 57 | |
neilt6 | 0:557a92280097 | 58 | //OS fault queue enumeration |
neilt6 | 0:557a92280097 | 59 | typedef enum { |
neilt6 | 0:557a92280097 | 60 | LM75B_OS_FaultQueue_1, |
neilt6 | 0:557a92280097 | 61 | LM75B_OS_FaultQueue_2, |
neilt6 | 0:557a92280097 | 62 | LM75B_OS_FaultQueue_4, |
neilt6 | 0:557a92280097 | 63 | LM75B_OS_FaultQueue_6 |
neilt6 | 0:557a92280097 | 64 | } LM75B_OS_FaultQueue_t; |
neilt6 | 0:557a92280097 | 65 | |
neilt6 | 0:557a92280097 | 66 | /** LM75B class. |
neilt6 | 0:557a92280097 | 67 | * Used for controlling an LM75B temperature sensor connected via I2C. |
neilt6 | 0:557a92280097 | 68 | * |
neilt6 | 0:557a92280097 | 69 | * Example: |
neilt6 | 0:557a92280097 | 70 | * @code |
neilt6 | 0:557a92280097 | 71 | * #include "mbed.h" |
neilt6 | 0:557a92280097 | 72 | * #include "LM75B.h" |
neilt6 | 0:557a92280097 | 73 | * |
neilt6 | 0:557a92280097 | 74 | * Serial pc(USBTX, USBRX); |
neilt6 | 0:557a92280097 | 75 | * LM75B sensor(p28, p27, LM75B_A0); |
neilt6 | 0:557a92280097 | 76 | * |
neilt6 | 0:557a92280097 | 77 | * int main() { |
neilt6 | 0:557a92280097 | 78 | * while (1) { |
neilt6 | 0:557a92280097 | 79 | * //Read the temperature |
neilt6 | 0:557a92280097 | 80 | * float temp = sensor.getTemp(); |
neilt6 | 0:557a92280097 | 81 | * |
neilt6 | 0:557a92280097 | 82 | * //Print the temperature |
neilt6 | 0:557a92280097 | 83 | * pc.printf("Temp = %.3f\n", temp); |
neilt6 | 0:557a92280097 | 84 | * |
neilt6 | 0:557a92280097 | 85 | * //Sleep for 0.5 seconds |
neilt6 | 0:557a92280097 | 86 | * wait(0.5); |
neilt6 | 0:557a92280097 | 87 | * } |
neilt6 | 0:557a92280097 | 88 | * } |
neilt6 | 0:557a92280097 | 89 | * @endcode |
neilt6 | 0:557a92280097 | 90 | */ |
neilt6 | 0:557a92280097 | 91 | class LM75B |
neilt6 | 0:557a92280097 | 92 | { |
neilt6 | 0:557a92280097 | 93 | public: |
neilt6 | 0:557a92280097 | 94 | /** Create an LM75B object connected to the specified I2C pins with the specified I2C slave address |
neilt6 | 0:557a92280097 | 95 | * |
neilt6 | 0:557a92280097 | 96 | * @param sda I2C data pin |
neilt6 | 0:557a92280097 | 97 | * @param scl I2C clock pin |
neilt6 | 0:557a92280097 | 98 | * @param addr I2C slave address |
neilt6 | 0:557a92280097 | 99 | */ |
neilt6 | 0:557a92280097 | 100 | LM75B(PinName sda, PinName scl, int addr); |
neilt6 | 0:557a92280097 | 101 | |
neilt6 | 0:557a92280097 | 102 | /** Get the current power mode of the LM75B |
neilt6 | 0:557a92280097 | 103 | * |
neilt6 | 0:557a92280097 | 104 | * @returns The current power mode as an LM75B_OS_Mode_t enum. |
neilt6 | 0:557a92280097 | 105 | */ |
neilt6 | 0:557a92280097 | 106 | LM75B_Power_t getPowerMode(void); |
neilt6 | 0:557a92280097 | 107 | |
neilt6 | 0:557a92280097 | 108 | /** Set the power mode of the LM75B |
neilt6 | 0:557a92280097 | 109 | * |
neilt6 | 0:557a92280097 | 110 | * @param mode The new power mode as an LM75B_OS_Mode_t enum. |
neilt6 | 0:557a92280097 | 111 | */ |
neilt6 | 0:557a92280097 | 112 | void setPowerMode(LM75B_Power_t mode); |
neilt6 | 0:557a92280097 | 113 | |
neilt6 | 0:557a92280097 | 114 | /** Get the current OS pin mode of the LM75B |
neilt6 | 0:557a92280097 | 115 | * |
neilt6 | 0:557a92280097 | 116 | * @returns The current OS pin mode as an LM75B_OS_Mode_t enum. |
neilt6 | 0:557a92280097 | 117 | */ |
neilt6 | 0:557a92280097 | 118 | LM75B_OS_Mode_t getOSMode(void); |
neilt6 | 0:557a92280097 | 119 | |
neilt6 | 0:557a92280097 | 120 | /** Set the OS pin mode of the LM75B |
neilt6 | 0:557a92280097 | 121 | * |
neilt6 | 0:557a92280097 | 122 | * @param mode The new OS pin mode as an LM75B_OS_Mode_t enum. |
neilt6 | 0:557a92280097 | 123 | */ |
neilt6 | 0:557a92280097 | 124 | void setOSMode(LM75B_OS_Mode_t mode); |
neilt6 | 0:557a92280097 | 125 | |
neilt6 | 0:557a92280097 | 126 | /** Get the current OS pin polarity of the LM75B |
neilt6 | 0:557a92280097 | 127 | * |
neilt6 | 0:557a92280097 | 128 | * @returns The current OS pin polarity as an LM75B_OS_Polarity_t enum. |
neilt6 | 0:557a92280097 | 129 | */ |
neilt6 | 0:557a92280097 | 130 | LM75B_OS_Polarity_t getOSPolarity(void); |
neilt6 | 0:557a92280097 | 131 | |
neilt6 | 0:557a92280097 | 132 | /** Set the OS pin polarity of the LM75B |
neilt6 | 0:557a92280097 | 133 | * |
neilt6 | 0:557a92280097 | 134 | * @param polarity The new OS pin polarity as an LM75B_OS_Polarity_t enum. |
neilt6 | 0:557a92280097 | 135 | */ |
neilt6 | 0:557a92280097 | 136 | void setOSPolarity(LM75B_OS_Polarity_t polarity); |
neilt6 | 0:557a92280097 | 137 | |
neilt6 | 0:557a92280097 | 138 | /** Get the current OS pin fault queue length of the LM75B |
neilt6 | 0:557a92280097 | 139 | * |
neilt6 | 0:557a92280097 | 140 | * @returns The current OS pin fault queue length as an LM75B_OS_FaultQueue_t enum. |
neilt6 | 0:557a92280097 | 141 | */ |
neilt6 | 0:557a92280097 | 142 | LM75B_OS_FaultQueue_t getOSFaultQueue(void); |
neilt6 | 0:557a92280097 | 143 | |
neilt6 | 0:557a92280097 | 144 | /** Set the OS pin fault queue length of the LM75B |
neilt6 | 0:557a92280097 | 145 | * |
neilt6 | 0:557a92280097 | 146 | * @param queue The new OS pin fault queue length as an LM75B_OS_FaultQueue_t enum. |
neilt6 | 0:557a92280097 | 147 | */ |
neilt6 | 0:557a92280097 | 148 | void setOSFaultQueue(LM75B_OS_FaultQueue_t queue); |
neilt6 | 0:557a92280097 | 149 | |
neilt6 | 0:557a92280097 | 150 | /** Get the current alert temperature threshold of the LM75B |
neilt6 | 0:557a92280097 | 151 | * |
neilt6 | 0:557a92280097 | 152 | * @returns The current alert temperature threshold as a float. |
neilt6 | 0:557a92280097 | 153 | */ |
neilt6 | 0:557a92280097 | 154 | float getAlertTemp(void); |
neilt6 | 0:557a92280097 | 155 | |
neilt6 | 0:557a92280097 | 156 | /** Set the alert temperature threshold of the LM75B |
neilt6 | 0:557a92280097 | 157 | * |
neilt6 | 0:557a92280097 | 158 | * @param temp The new alert temperature threshold as a float. |
neilt6 | 0:557a92280097 | 159 | */ |
neilt6 | 0:557a92280097 | 160 | void setAlertTemp(float temp); |
neilt6 | 0:557a92280097 | 161 | |
neilt6 | 0:557a92280097 | 162 | /** Get the current alert temperature hysteresis threshold of the LM75B |
neilt6 | 0:557a92280097 | 163 | * |
neilt6 | 0:557a92280097 | 164 | * @returns The current alert temperature hysteresis threshold as a float. |
neilt6 | 0:557a92280097 | 165 | */ |
neilt6 | 0:557a92280097 | 166 | float getAlertHyst(void); |
neilt6 | 0:557a92280097 | 167 | |
neilt6 | 0:557a92280097 | 168 | /** Set the alert temperature hysteresis threshold of the LM75B |
neilt6 | 0:557a92280097 | 169 | * |
neilt6 | 0:557a92280097 | 170 | * @param temp The new alert temperature hysteresis threshold as a float. |
neilt6 | 0:557a92280097 | 171 | */ |
neilt6 | 0:557a92280097 | 172 | void setAlertHyst(float temp); |
neilt6 | 0:557a92280097 | 173 | |
neilt6 | 0:557a92280097 | 174 | /** Get the current temperature measurement of the LM75B |
neilt6 | 0:557a92280097 | 175 | * |
neilt6 | 0:557a92280097 | 176 | * @returns The current temperature measurement as a float. |
neilt6 | 0:557a92280097 | 177 | */ |
neilt6 | 0:557a92280097 | 178 | float getTemp(void); |
neilt6 | 0:557a92280097 | 179 | |
neilt6 | 0:557a92280097 | 180 | private: |
neilt6 | 0:557a92280097 | 181 | I2C _i2c; |
neilt6 | 0:557a92280097 | 182 | int _addr; |
neilt6 | 0:557a92280097 | 183 | char _read8(char reg); |
neilt6 | 0:557a92280097 | 184 | void _write8(char reg, char data); |
neilt6 | 0:557a92280097 | 185 | unsigned short _read16(char reg); |
neilt6 | 0:557a92280097 | 186 | void _write16(char reg, unsigned short data); |
neilt6 | 0:557a92280097 | 187 | float _readTempHelper(char reg); |
neilt6 | 0:557a92280097 | 188 | void _writeTempHelper(char reg, float temp); |
neilt6 | 0:557a92280097 | 189 | }; |
neilt6 | 0:557a92280097 | 190 | |
neilt6 | 0:557a92280097 | 191 | #endif |