/*!
LTC2302: 12-Bit, 1-Channel 500ksps SAR ADC with SPI Interface.

@verbatim

The LTC2302 is a single-channel 12-bit A/D converter with with serial I/O.
The part can be configured to operate on unipolar or bipolar modes. The
automatic sleep mode benefits power sensitive applications.

SPI DATA FORMAT (MSB First):

            Byte #1                           Byte #2
Data In  :   X  OS   X   X  UNI  X    X   X    X   X   X   X   X   X   X   X
Data Out :  D15 D14 D13 D12 D11 D10  D9  D8   D7  D6  D5  D4  D3  D2  D1  D0

OS   : ODD/Sign Bit
UNI  : Unipolar/Bipolar Bit
Dx   : Data Bits
X    : Don't care

@endverbatim

http://www.linear.com/product/LTC2302

http://www.linear.com/product/LTC2302#demoboards


Copyright 2018(c) Analog Devices, Inc.

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 - The use of this software may or may not infringe the patent rights
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THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
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*/

/*! @file
    @ingroup LTC2302
    Header for LTC2302: 12-Bit, 1-Channel 500ksps SAR ADC with SPI Interface.
*/

#ifndef LTC2302_H
#define LTC2302_H

//! Define the SPI CS pin
#ifndef LTC2302_CS
#define LTC2302_CS QUIKEVAL_CS
#endif

//! @name LTC2302 Uni/Bipolar Config bits
//! @{
// Unipolar Mode Command
#define LTC2302_UNIPOLAR   0xBFFF
// Bipolar Mode Command
#define LTC2302_BIPOLAR    0x0000
//!@}

//! Reads the ADC and returns 16-bit data
//! @return void
void LTC2302_read(uint8_t cs,                 //!< Chip Select Pin
                  uint16_t adc_command,       //!< Channel address, config bits ORed together
                  uint16_t *adc_code          //!< Returns code read from ADC (from previous conversion)
                 );

//! Calculates the LTC2302 input voltage given the data, range, and unipolar/bipolar status.
//! @return Floating point voltage
float LTC2302_code_to_voltage(uint16_t adc_code,  //!< Raw ADC code
                              float vref,       //!< Reference voltage
                              uint8_t uni_bipolar //!< Choice of unipolar/bipolar
                             );
#endif  //  LTC2302_H