DS7505 C, C++ driver source code: The DS7505 low-voltage (1.7V to 3.7V) digital thermometer and thermostat provides 9 to 12-bit digital temperature readings over a -55°C to +125°C range with +-0.5°C accuracy in the 0°C (32°F) to +70°C (158°F) range.
Dependents: DS7505_Temperature_Sensor_Low_Power
ds7505_cpp.cpp@25:93287f99d225, 2019-04-27 (annotated)
- Committer:
- phonemacro
- Date:
- Sat Apr 27 09:50:48 2019 +0000
- Revision:
- 25:93287f99d225
Initial Commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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phonemacro | 25:93287f99d225 | 1 | /******************************************************************************* |
phonemacro | 25:93287f99d225 | 2 | * Copyright (C) 2019 Maxim Integrated Products, Inc., All Rights Reserved. |
phonemacro | 25:93287f99d225 | 3 | * |
phonemacro | 25:93287f99d225 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
phonemacro | 25:93287f99d225 | 5 | * copy of this software and associated documentation files (the "Software"), |
phonemacro | 25:93287f99d225 | 6 | * to deal in the Software without restriction, including without limitation |
phonemacro | 25:93287f99d225 | 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
phonemacro | 25:93287f99d225 | 8 | * and/or sell copies of the Software, and to permit persons to whom the |
phonemacro | 25:93287f99d225 | 9 | * Software is furnished to do so, subject to the following conditions: |
phonemacro | 25:93287f99d225 | 10 | * |
phonemacro | 25:93287f99d225 | 11 | * The above copyright notice and this permission notice shall be included |
phonemacro | 25:93287f99d225 | 12 | * in all copies or substantial portions of the Software. |
phonemacro | 25:93287f99d225 | 13 | * |
phonemacro | 25:93287f99d225 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
phonemacro | 25:93287f99d225 | 15 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
phonemacro | 25:93287f99d225 | 16 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
phonemacro | 25:93287f99d225 | 17 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
phonemacro | 25:93287f99d225 | 18 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
phonemacro | 25:93287f99d225 | 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
phonemacro | 25:93287f99d225 | 20 | * OTHER DEALINGS IN THE SOFTWARE. |
phonemacro | 25:93287f99d225 | 21 | * |
phonemacro | 25:93287f99d225 | 22 | * Except as contained in this notice, the name of Maxim Integrated |
phonemacro | 25:93287f99d225 | 23 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
phonemacro | 25:93287f99d225 | 24 | * Products, Inc. Branding Policy. |
phonemacro | 25:93287f99d225 | 25 | * |
phonemacro | 25:93287f99d225 | 26 | * The mere transfer of this software does not imply any licenses |
phonemacro | 25:93287f99d225 | 27 | * of trade secrets, proprietary technology, copyrights, patents, |
phonemacro | 25:93287f99d225 | 28 | * trademarks, maskwork rights, or any other form of intellectual |
phonemacro | 25:93287f99d225 | 29 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
phonemacro | 25:93287f99d225 | 30 | * ownership rights. |
phonemacro | 25:93287f99d225 | 31 | ******************************************************************************* |
phonemacro | 25:93287f99d225 | 32 | */ |
phonemacro | 25:93287f99d225 | 33 | #include "ds7505.h" |
phonemacro | 25:93287f99d225 | 34 | #include "ds7505_cpp.h" |
phonemacro | 25:93287f99d225 | 35 | #include "mbed.h" |
phonemacro | 25:93287f99d225 | 36 | // #include "USBSerial.h" |
phonemacro | 25:93287f99d225 | 37 | |
phonemacro | 25:93287f99d225 | 38 | /****************************************************************************** |
phonemacro | 25:93287f99d225 | 39 | * C++ version for DS7505 driver * |
phonemacro | 25:93287f99d225 | 40 | ****************************************************************************** |
phonemacro | 25:93287f99d225 | 41 | */ |
phonemacro | 25:93287f99d225 | 42 | |
phonemacro | 25:93287f99d225 | 43 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 44 | DS7505::DS7505(I2C &i2c_bus, uint8_t slave_address): |
phonemacro | 25:93287f99d225 | 45 | m_i2c(i2c_bus), |
phonemacro | 25:93287f99d225 | 46 | m_write_address(slave_address <<1), |
phonemacro | 25:93287f99d225 | 47 | m_read_address ((slave_address << 1) | 1) |
phonemacro | 25:93287f99d225 | 48 | { |
phonemacro | 25:93287f99d225 | 49 | } |
phonemacro | 25:93287f99d225 | 50 | |
phonemacro | 25:93287f99d225 | 51 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 52 | DS7505::~DS7505(void) |
phonemacro | 25:93287f99d225 | 53 | { |
phonemacro | 25:93287f99d225 | 54 | /** empty block */ |
phonemacro | 25:93287f99d225 | 55 | } |
phonemacro | 25:93287f99d225 | 56 | |
phonemacro | 25:93287f99d225 | 57 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 58 | int DS7505::read_cfg_reg(uint8_t *value) |
phonemacro | 25:93287f99d225 | 59 | { |
phonemacro | 25:93287f99d225 | 60 | int32_t ret; |
phonemacro | 25:93287f99d225 | 61 | char data[1] = {0}; |
phonemacro | 25:93287f99d225 | 62 | char reg = DS7505_REG_CONFIGURATION; |
phonemacro | 25:93287f99d225 | 63 | |
phonemacro | 25:93287f99d225 | 64 | /* write to the Register Select, true is for repeated start */ |
phonemacro | 25:93287f99d225 | 65 | ret = m_i2c.write(m_write_address, ®, 1, true); |
phonemacro | 25:93287f99d225 | 66 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 67 | ret = m_i2c.read(m_read_address, data, 1, false); |
phonemacro | 25:93287f99d225 | 68 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 69 | *value = data[0]; |
phonemacro | 25:93287f99d225 | 70 | return DS7505_NO_ERROR; |
phonemacro | 25:93287f99d225 | 71 | } else { |
phonemacro | 25:93287f99d225 | 72 | printf( |
phonemacro | 25:93287f99d225 | 73 | "%s: failed to read data: ret: %d\r\n", __func__, ret); |
phonemacro | 25:93287f99d225 | 74 | } |
phonemacro | 25:93287f99d225 | 75 | } else { |
phonemacro | 25:93287f99d225 | 76 | printf("%s: failed to write to Register Select: ret: %d\r\n", |
phonemacro | 25:93287f99d225 | 77 | __func__, ret); |
phonemacro | 25:93287f99d225 | 78 | } |
phonemacro | 25:93287f99d225 | 79 | return DS7505_ERROR; |
phonemacro | 25:93287f99d225 | 80 | } |
phonemacro | 25:93287f99d225 | 81 | |
phonemacro | 25:93287f99d225 | 82 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 83 | int DS7505::read_reg16(int16_t *value, char reg) |
phonemacro | 25:93287f99d225 | 84 | { |
phonemacro | 25:93287f99d225 | 85 | int32_t ret; |
phonemacro | 25:93287f99d225 | 86 | char data[2] = {0, 0}; |
phonemacro | 25:93287f99d225 | 87 | ds7505_raw_data tmp; |
phonemacro | 25:93287f99d225 | 88 | |
phonemacro | 25:93287f99d225 | 89 | if (reg == DS7505_REG_TEMPERATURE || |
phonemacro | 25:93287f99d225 | 90 | reg == DS7505_REG_THYST_LOW_TRIP || reg == DS7505_REG_TOS_HIGH_TRIP) { |
phonemacro | 25:93287f99d225 | 91 | /* write to the Register Select, true is for repeated start */ |
phonemacro | 25:93287f99d225 | 92 | ret = m_i2c.write(m_write_address, ®, 1, true); |
phonemacro | 25:93287f99d225 | 93 | /* read the two bytes of data */ |
phonemacro | 25:93287f99d225 | 94 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 95 | ret = m_i2c.read(m_read_address, data, 2, false); |
phonemacro | 25:93287f99d225 | 96 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 97 | tmp.msb = data[0]; |
phonemacro | 25:93287f99d225 | 98 | tmp.lsb = data[1]; |
phonemacro | 25:93287f99d225 | 99 | *value = tmp.swrd; |
phonemacro | 25:93287f99d225 | 100 | return DS7505_NO_ERROR; |
phonemacro | 25:93287f99d225 | 101 | } else { |
phonemacro | 25:93287f99d225 | 102 | printf( |
phonemacro | 25:93287f99d225 | 103 | "%s: failed to read data: ret: %d\r\n", __func__, ret); |
phonemacro | 25:93287f99d225 | 104 | } |
phonemacro | 25:93287f99d225 | 105 | } else { |
phonemacro | 25:93287f99d225 | 106 | printf("%s: failed to write to Register Select: ret: %d\r\n", |
phonemacro | 25:93287f99d225 | 107 | __func__, ret); |
phonemacro | 25:93287f99d225 | 108 | } |
phonemacro | 25:93287f99d225 | 109 | } else { |
phonemacro | 25:93287f99d225 | 110 | printf("%s: register address is not correct: register: %d\r\n", |
phonemacro | 25:93287f99d225 | 111 | __func__, reg); |
phonemacro | 25:93287f99d225 | 112 | } |
phonemacro | 25:93287f99d225 | 113 | return DS7505_ERROR; |
phonemacro | 25:93287f99d225 | 114 | } |
phonemacro | 25:93287f99d225 | 115 | |
phonemacro | 25:93287f99d225 | 116 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 117 | float DS7505::read_reg_as_temperature(uint8_t reg) |
phonemacro | 25:93287f99d225 | 118 | { |
phonemacro | 25:93287f99d225 | 119 | ds7505_raw_data tmp; |
phonemacro | 25:93287f99d225 | 120 | float temperature; |
phonemacro | 25:93287f99d225 | 121 | if (reg == DS7505_REG_TEMPERATURE || |
phonemacro | 25:93287f99d225 | 122 | reg == DS7505_REG_THYST_LOW_TRIP || reg == DS7505_REG_TOS_HIGH_TRIP) { |
phonemacro | 25:93287f99d225 | 123 | read_reg16(&tmp.swrd, reg); |
phonemacro | 25:93287f99d225 | 124 | temperature = (float)tmp.swrd; /* values are 2's complement */ |
phonemacro | 25:93287f99d225 | 125 | temperature *= DS7505_CF_LSB; |
phonemacro | 25:93287f99d225 | 126 | return temperature; |
phonemacro | 25:93287f99d225 | 127 | } else { |
phonemacro | 25:93287f99d225 | 128 | printf("%s: register is invalid, %d r\n", __func__, reg); |
phonemacro | 25:93287f99d225 | 129 | return 0; |
phonemacro | 25:93287f99d225 | 130 | } |
phonemacro | 25:93287f99d225 | 131 | } |
phonemacro | 25:93287f99d225 | 132 | |
phonemacro | 25:93287f99d225 | 133 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 134 | int DS7505::write_reg16(int16_t value, char reg) |
phonemacro | 25:93287f99d225 | 135 | { |
phonemacro | 25:93287f99d225 | 136 | int32_t ret; |
phonemacro | 25:93287f99d225 | 137 | char cmd[3]; |
phonemacro | 25:93287f99d225 | 138 | ds7505_raw_data tmp; |
phonemacro | 25:93287f99d225 | 139 | |
phonemacro | 25:93287f99d225 | 140 | if (reg >= DS7505_REG_THYST_LOW_TRIP && reg <= DS7505_REG_MAX) { |
phonemacro | 25:93287f99d225 | 141 | cmd[0] = reg; |
phonemacro | 25:93287f99d225 | 142 | tmp.swrd = value; |
phonemacro | 25:93287f99d225 | 143 | cmd[1] = tmp.msb; |
phonemacro | 25:93287f99d225 | 144 | cmd[2] = tmp.lsb; |
phonemacro | 25:93287f99d225 | 145 | ret = m_i2c.write(m_write_address, cmd, 3, false); |
phonemacro | 25:93287f99d225 | 146 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 147 | return DS7505_NO_ERROR; |
phonemacro | 25:93287f99d225 | 148 | } else { |
phonemacro | 25:93287f99d225 | 149 | printf("%s: I2C write error %d\r\n",__func__, ret); |
phonemacro | 25:93287f99d225 | 150 | return DS7505_ERROR; |
phonemacro | 25:93287f99d225 | 151 | } |
phonemacro | 25:93287f99d225 | 152 | } else { |
phonemacro | 25:93287f99d225 | 153 | printf("%s: register value invalid %x\r\n",__func__, reg); |
phonemacro | 25:93287f99d225 | 154 | return DS7505_ERROR; |
phonemacro | 25:93287f99d225 | 155 | } |
phonemacro | 25:93287f99d225 | 156 | } |
phonemacro | 25:93287f99d225 | 157 | |
phonemacro | 25:93287f99d225 | 158 | |
phonemacro | 25:93287f99d225 | 159 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 160 | int DS7505::write_cfg_reg(uint8_t cfg) |
phonemacro | 25:93287f99d225 | 161 | { |
phonemacro | 25:93287f99d225 | 162 | int32_t ret; |
phonemacro | 25:93287f99d225 | 163 | char cmd[2]; |
phonemacro | 25:93287f99d225 | 164 | |
phonemacro | 25:93287f99d225 | 165 | cmd[0] = DS7505_REG_CONFIGURATION; |
phonemacro | 25:93287f99d225 | 166 | cmd[1] = cfg; |
phonemacro | 25:93287f99d225 | 167 | ret = m_i2c.write(m_write_address, cmd, 2, false); |
phonemacro | 25:93287f99d225 | 168 | if (ret == 0) { |
phonemacro | 25:93287f99d225 | 169 | return DS7505_NO_ERROR; |
phonemacro | 25:93287f99d225 | 170 | } else { |
phonemacro | 25:93287f99d225 | 171 | printf("%s: I2C write error %d\r\n",__func__, ret); |
phonemacro | 25:93287f99d225 | 172 | return DS7505_ERROR; |
phonemacro | 25:93287f99d225 | 173 | } |
phonemacro | 25:93287f99d225 | 174 | } |
phonemacro | 25:93287f99d225 | 175 | |
phonemacro | 25:93287f99d225 | 176 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 177 | int DS7505::write_trip_low_thyst(float temperature) |
phonemacro | 25:93287f99d225 | 178 | { |
phonemacro | 25:93287f99d225 | 179 | ds7505_raw_data raw; |
phonemacro | 25:93287f99d225 | 180 | temperature /= DS7505_CF_LSB; |
phonemacro | 25:93287f99d225 | 181 | raw.swrd = int16_t(temperature); |
phonemacro | 25:93287f99d225 | 182 | return write_reg16(raw.swrd, DS7505_REG_THYST_LOW_TRIP); |
phonemacro | 25:93287f99d225 | 183 | } |
phonemacro | 25:93287f99d225 | 184 | |
phonemacro | 25:93287f99d225 | 185 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 186 | int DS7505::write_trip_high_tos(float temperature) |
phonemacro | 25:93287f99d225 | 187 | { |
phonemacro | 25:93287f99d225 | 188 | ds7505_raw_data raw; |
phonemacro | 25:93287f99d225 | 189 | temperature /= DS7505_CF_LSB; |
phonemacro | 25:93287f99d225 | 190 | raw.swrd = int16_t(temperature); |
phonemacro | 25:93287f99d225 | 191 | return write_reg16(raw.uwrd, DS7505_REG_TOS_HIGH_TRIP); |
phonemacro | 25:93287f99d225 | 192 | } |
phonemacro | 25:93287f99d225 | 193 | |
phonemacro | 25:93287f99d225 | 194 | /******************************************************************************/ |
phonemacro | 25:93287f99d225 | 195 | float DS7505::celsius_to_fahrenheit(float temp_c) |
phonemacro | 25:93287f99d225 | 196 | { |
phonemacro | 25:93287f99d225 | 197 | float temp_f; |
phonemacro | 25:93287f99d225 | 198 | temp_f = ((temp_c * 9)/5) + 32; |
phonemacro | 25:93287f99d225 | 199 | return temp_f; |
phonemacro | 25:93287f99d225 | 200 | } |