voltmeter.h

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/*
 * MikroSDK - MikroE Software Development Kit
 * Copyright© 2020 MikroElektronika d.o.o.
 * 
 * Permission is hereby granted, free of charge, to any person 
 * obtaining a copy of this software and associated documentation 
 * files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, 
 * and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 
 * OR OTHER DEALINGS IN THE SOFTWARE. 
 */
 
// ----------------------------------------------------------------------------
 
#ifndef VOLTMETER_H
#define VOLTMETER_H
 
#ifdef PREINIT_SUPPORTED
#include "preinit.h"
#endif
 
#ifdef MikroCCoreVersion
    #if MikroCCoreVersion >= 1
        #include "delays.h"
    #endif
#endif
 
#include "drv_digital_out.h"
#include "drv_digital_in.h"
#include "drv_spi_master.h"
 
 
// -------------------------------------------------------------- PUBLIC MACROS 
#define VOLTMETER_MAP_MIKROBUS( cfg, mikrobus ) \
   cfg.miso  = MIKROBUS( mikrobus, MIKROBUS_MISO ); \
   cfg.mosi  = MIKROBUS( mikrobus, MIKROBUS_MOSI ); \
   cfg.sck   = MIKROBUS( mikrobus, MIKROBUS_SCK ); \
   cfg.cs    = MIKROBUS( mikrobus, MIKROBUS_CS ); \
   cfg.an = MIKROBUS( mikrobus, MIKROBUS_AN )
#define VOLTMETER_OK                       0
#define VOLTMETER_ERROR                   -1
#define VOLTMETER_DATA_RESOLUTION           0x0FFF
#define VOLTMETER_VREF_ISOLATED_GND         17.05f
#define VOLTMETER_VREF_SHARED_GND           8.525f
#define VOLTMETER_NUM_ADC_CONVERSIONS       100
#define VOLTMETER_DATA_OFFSET               15
#define VOLTMETER_GND_ISO                   1
#define VOLTMETER_GND_SHARED                0
 // End group macro 
// --------------------------------------------------------------- PUBLIC TYPES
typedef struct
{
    // Input pins 
    digital_in_t an;
    
    // Modules 
    spi_master_t spi;
    pin_name_t chip_select;
    
} voltmeter_t;
 
typedef struct
{
    // Communication gpio pins 
    pin_name_t miso;
    pin_name_t mosi;
    pin_name_t sck;
    pin_name_t cs;
 
    // Additional gpio pins 
    pin_name_t an;
 
    // static variable 
    uint32_t spi_speed;
    spi_master_mode_t spi_mode;
    spi_master_chip_select_polarity_t cs_polarity;
    
} voltmeter_cfg_t;
 
 // End types group
// ----------------------------------------------- PUBLIC FUNCTION DECLARATIONS
 
#ifdef __cplusplus
extern "C"{
#endif
 
void voltmeter_cfg_setup ( voltmeter_cfg_t *cfg );
 
err_t voltmeter_init ( voltmeter_t *ctx, voltmeter_cfg_t *cfg );
 
int16_t voltmeter_read_raw_data ( voltmeter_t *ctx );
 
float voltmeter_calculate_voltage ( voltmeter_t *ctx, int16_t raw_adc, uint8_t iso_gnd );
 
#ifdef __cplusplus
}
#endif
#endif  // _VOLTMETER_H_
 
 // End public_function group
 
// ------------------------------------------------------------------------- END