HTS221 relative humidity and temperature sensor library
Dependencies: X_NUCLEO_COMMON ST_INTERFACES
Diff: HTS221Sensor.h
- Revision:
- 2:312ee2694a77
- Parent:
- 1:c4391f20553e
- Child:
- 3:aadcccf527ef
diff -r c4391f20553e -r 312ee2694a77 HTS221Sensor.h --- a/HTS221Sensor.h Wed Sep 27 16:36:58 2017 +0200 +++ b/HTS221Sensor.h Mon Oct 02 09:28:41 2017 +0200 @@ -58,6 +58,7 @@ class HTS221Sensor : public HumiditySensor, public TempSensor { public: + HTS221Sensor(SPI *spi, PinName cs_pin=NC, PinName drdy_pin=NC); // SPI3W ONLY HTS221Sensor(DevI2C *i2c, uint8_t address=HTS221_I2C_ADDRESS, PinName drdy_pin=NC); virtual int init(void *init); virtual int read_id(uint8_t *id); @@ -79,7 +80,19 @@ */ uint8_t io_read(uint8_t* pBuffer, uint8_t RegisterAddr, uint16_t NumByteToRead) { - return (uint8_t) _dev_i2c->i2c_read(pBuffer, _address, RegisterAddr, NumByteToRead); + if (_dev_spi) { + /* Write Reg Address */ + _dev_spi->lock(); + _cs_pin = 0; + /* Write RD Reg Address with RD bit*/ + uint8_t TxByte = RegisterAddr | 0x80; + _dev_spi->write((char *)&TxByte, 1, (char *)pBuffer, (int) NumByteToRead); + _cs_pin = 1; + _dev_spi->unlock(); + return 0; + } + if (_dev_i2c) return (uint8_t) _dev_i2c->i2c_read(pBuffer, _address, RegisterAddr, NumByteToRead); + return 1; } /** @@ -91,13 +104,24 @@ */ uint8_t io_write(uint8_t* pBuffer, uint8_t RegisterAddr, uint16_t NumByteToWrite) { - return (uint8_t) _dev_i2c->i2c_write(pBuffer, _address, RegisterAddr, NumByteToWrite); + if (_dev_spi) { + _dev_spi->lock(); + _cs_pin = 0; + int data = _dev_spi->write(RegisterAddr); + _dev_spi->write((char *)pBuffer, (int) NumByteToWrite, NULL, 0); + _cs_pin = 1; + _dev_spi->unlock(); + return data; + } + if (_dev_i2c) return (uint8_t) _dev_i2c->i2c_write(pBuffer, _address, RegisterAddr, NumByteToWrite); + return 1; } private: /* Helper classes. */ DevI2C *_dev_i2c; + SPI * _dev_spi; /* Configuration */ uint8_t _address;