Takuo WATANABE / STTS751

A library for STMicroelectronics STTS751 I2C temperature sensor

Dependents:   STTS751_Demo

STTS751.cpp@0:4211e78bfa5d, 2014-01-18 (annotated)

Committer:
takuo
Date:
Sat Jan 18 02:29:05 2014 +0000
Revision:
0:4211e78bfa5d
Child:
1:b0a3645a3dba
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
takuo 0:4211e78bfa5d 1 /* STTS751 (I2C Temperature Sensor) Driver
takuo 0:4211e78bfa5d 2 * Copyright 2014, Takuo WATANABE (wtakuo)
takuo 0:4211e78bfa5d 3 *
takuo 0:4211e78bfa5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
takuo 0:4211e78bfa5d 5 * you may not use this file except in compliance with the License.
takuo 0:4211e78bfa5d 6 * You may obtain a copy of the License at
takuo 0:4211e78bfa5d 7 *
takuo 0:4211e78bfa5d 8 * http://www.apache.org/licenses/LICENSE-2.0
takuo 0:4211e78bfa5d 9 *
takuo 0:4211e78bfa5d 10 * Unless required by applicable law or agreed to in writing, software
takuo 0:4211e78bfa5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
takuo 0:4211e78bfa5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
takuo 0:4211e78bfa5d 13 * See the License for the specific language governing permissions and
takuo 0:4211e78bfa5d 14 * limitations under the License.
takuo 0:4211e78bfa5d 15 */
takuo 0:4211e78bfa5d 16
takuo 0:4211e78bfa5d 17 #include "STTS751.h"
takuo 0:4211e78bfa5d 18
takuo 0:4211e78bfa5d 19 STTS751::STTS751(PinName sda, PinName scl, Address addr, Model model): _i2c(sda, scl), _addr(addr | model)
takuo 0:4211e78bfa5d 20 {
takuo 0:4211e78bfa5d 21 init();
takuo 0:4211e78bfa5d 22 }
takuo 0:4211e78bfa5d 23
takuo 0:4211e78bfa5d 24 STTS751::STTS751(I2C &i2c, Address addr, Model model): _i2c(i2c), _addr(addr | model)
takuo 0:4211e78bfa5d 25 {
takuo 0:4211e78bfa5d 26 init();
takuo 0:4211e78bfa5d 27 }
takuo 0:4211e78bfa5d 28
takuo 0:4211e78bfa5d 29 void STTS751::init()
takuo 0:4211e78bfa5d 30 {
takuo 0:4211e78bfa5d 31 // TODO: proper initialization of the device
takuo 0:4211e78bfa5d 32 }
takuo 0:4211e78bfa5d 33
takuo 0:4211e78bfa5d 34 float STTS751::temp()
takuo 0:4211e78bfa5d 35 {
takuo 0:4211e78bfa5d 36 signed char h = read8(REG_TEMPERATURE_H);
takuo 0:4211e78bfa5d 37 unsigned char l = read8(REG_TEMPERATURE_L);
takuo 0:4211e78bfa5d 38 return ((h << 8) | l) / 256.0;
takuo 0:4211e78bfa5d 39 }
takuo 0:4211e78bfa5d 40
takuo 0:4211e78bfa5d 41 STTS751::operator float()
takuo 0:4211e78bfa5d 42 {
takuo 0:4211e78bfa5d 43 return temp();
takuo 0:4211e78bfa5d 44 }
takuo 0:4211e78bfa5d 45
takuo 0:4211e78bfa5d 46 char STTS751::read8(char reg) {
takuo 0:4211e78bfa5d 47 _i2c.write(_addr, &reg, 1, true);
takuo 0:4211e78bfa5d 48 _i2c.read(_addr, &reg, 1);
takuo 0:4211e78bfa5d 49 return reg;
takuo 0:4211e78bfa5d 50 }