A library for STMicroelectronics STTS751 I2C temperature sensor
Diff: STTS751.cpp
- Revision:
- 2:3116fe4a0079
- Parent:
- 1:b0a3645a3dba
- Child:
- 3:f9d3008f7e8f
diff -r b0a3645a3dba -r 3116fe4a0079 STTS751.cpp --- a/STTS751.cpp Sat Jan 18 02:31:12 2014 +0000 +++ b/STTS751.cpp Sun Jan 19 03:13:38 2014 +0000 @@ -16,6 +16,8 @@ #include "STTS751.h" +#define SET_BITS(x,m,b) (((x) & !(m)) | (b)) + STTS751::STTS751(PinName sda, PinName scl, Address addr, Model model): _i2c(sda, scl), _addr(addr | model) { init(); @@ -28,7 +30,23 @@ void STTS751::init() { - // TODO: proper initialization of the device + write8(REG_CONFIGURATION, 0x00); + write8(REG_CONV_RATE, 0x04); +} + +int STTS751::addr() { + return _addr; +} + +STTS751::Resolution STTS751::resolution() { + char conf = read8(REG_CONFIGURATION); + return (STTS751::Resolution)(conf & RES_MASK); +} + +void STTS751::setResolution(STTS751::Resolution res) { + char conf = read8(REG_CONFIGURATION); + conf = SET_BITS(conf, RES_MASK, res); + write8(REG_CONFIGURATION, conf); } float STTS751::temp() @@ -38,13 +56,20 @@ return ((h << 8) | l) / 256.0; } +#ifdef MBED_OPERATORS STTS751::operator float() { return temp(); } +#endif char STTS751::read8(char reg) { _i2c.write(_addr, ®, 1, true); _i2c.read(_addr, ®, 1); return reg; } + +void STTS751::write8(char reg, char data) { + char buff[2] = { reg, data }; + _i2c.write(_addr, buff, 2); +}