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//*****************************************************************************
//
// sht21.h - Prototypes for the SHT21 accelerometer driver.
//
// Copyright (c) 2013-2014 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 2.1.0.12573 of the Tiva Firmware Development Package.
//
//*****************************************************************************
#ifndef __SENSORLIB_SHT21_H__
#define __SENSORLIB_SHT21_H__
//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif
//*****************************************************************************
//
// The structure that defines the internal state of the SHT21 driver.
//
//*****************************************************************************
typedef struct
{
//
// The pointer to the I2C master interface instance used to communicate
// with the SHT21.
//
tI2CMInstance *psI2CInst;
//
// the I2C address of the SHT21.
//
uint8_t ui8Addr;
//
// the state of the state machine used while accessing the
// SHT21.
//
uint8_t ui8State;
//
// the data buffer used for sending/receiving data to/from the
// SHT21.
//
uint8_t pui8Data[5];
//
// the 16 bit raw temperature reading
//
uint16_t ui16Temperature;
//
// the 16 bit raw humidity reading
//
uint16_t ui16Humidity;
//
// the function that is called when the current request has
// completed processing.
//
tSensorCallback *pfnCallback;
//
// the callback data provided to the callback function.
//
void *pvCallbackData;
//
// A union of structures that are used for read, write and
// read-modify-write operations. Since only one operation can be active at
// a time, it is safe to re-use the memory in this manner.
//
union
{
//
// A buffer used to store the write portion of a register read.
//
uint8_t pui8Buffer[2];
//
// The write state used to write register values.
//
tI2CMWrite8 sWriteState;
//
// The read-modify-write state used to modify register values.
//
tI2CMReadModifyWrite8 sReadModifyWriteState;
}
uCommand;
}
tSHT21;
//*****************************************************************************
//
// Function prototypes.
//
//*****************************************************************************
extern uint_fast8_t SHT21Init(tSHT21 *psInst, tI2CMInstance *psI2CInst,
uint_fast8_t ui8I2CAddr,
tSensorCallback *pfnCallback,
void *pvCallbackData);
extern uint_fast8_t SHT21Read(tSHT21 *psInst, uint_fast8_t ui8Reg,
uint8_t *pui8Data, uint_fast16_t ui16Count,
tSensorCallback *pfnCallback,
void *pvCallbackData);
extern uint_fast8_t SHT21Write(tSHT21 *psInst, uint_fast8_t ui8Reg,
const uint8_t *pui8Data,
uint_fast16_t ui16Count,
tSensorCallback *pfnCallback,
void *pvCallbackData);
extern uint_fast8_t SHT21ReadModifyWrite(tSHT21 *psInst, uint_fast8_t ui8Reg,
uint_fast8_t ui8Mask,
uint_fast8_t ui8Value,
tSensorCallback *pfnCallback,
void *pvCallbackData);
extern uint_fast8_t SHT21DataRead(tSHT21 *psInst, tSensorCallback *pfnCallback,
void *pvCallbackData);
extern void SHT21DataTemperatureGetRaw(tSHT21 *psInst,
uint16_t *pui16Temperature);
extern void SHT21DataTemperatureGetFloat(tSHT21 *psInst, float *pfTemperature);
extern void SHT21DataHumidityGetRaw(tSHT21 *psInst, uint16_t *pui16Humidity);
extern void SHT21DataHumidityGetFloat(tSHT21 *psInst, float *pfHumidity);
//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif
#endif // __SENSORLIB_SHT21_H__
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