adt7420.h

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/***************************************************************************/
#ifndef __ADT7420_H__
#define __ADT7420_H__
 
#include "no_os_spi.h"
#include "no_os_i2c.h"
#include "no_os_util.h"
#include <stdbool.h>
 
/* ADT7420 address */
#define ADT7420_A0_PIN(x)       (((x) & 0x1) << 0) // I2C Serial Bus Address Selection Pin
#define ADT7420_A1_PIN(x)       (((x) & 0x1) << 1) // I2C Serial Bus Address Selection Pin
#define ADT7420_ADDRESS(x,y)        (0x48 + ADT7420_A1_PIN(x) + ADT7420_A0_PIN(y))
#define ADT7320_L16             NO_OS_BIT(8)    //indicator that register is 16-bit
#define ADT7320_ADDR_MSK        NO_OS_GENMASK(7,0)
 
/* ADT7320  (SPI) registers */
#define ADT7320_REG_STATUS      0x00 // Status
#define ADT7320_REG_CONFIG      0x01 // Configuration
#define ADT7320_REG_TEMP        (ADT7320_L16 | 0x02) // Temperature value
#define ADT7320_REG_ID          0x03 // ID
#define ADT7320_REG_T_CRIT      (ADT7320_L16 | 0x04) // Temperature CRIT setpoint (147'C)
#define ADT7320_REG_HIST        0x05 // Temperature HYST setpoint (5'C)
#define ADT7320_REG_T_HIGH          (ADT7320_L16 | 0x06) // Temperature HIGH setpoint (64'C)
#define ADT7320_REG_T_LOW           (ADT7320_L16 | 0x07) // Temperature LOW setpoint (10'C)
 
/* ADT7320 SPI command byte */
#define ADT7320_WRITE_MASK_CMD      0b00111000 // SPI write command
#define ADT7320_READ_CMD        0b01000000 // SPI read command
 
/* ADT7420 (I2C) registers */
#define ADT7420_REG_TEMP_MSB        (ADT7320_L16 |0x00) // Temperature value MSB
#define ADT7420_REG_TEMP_LSB        0x01 // Temperature value LSB
#define ADT7420_REG_STATUS      0x02 // Status
#define ADT7420_REG_CONFIG      0x03 // Configuration
#define ADT7420_REG_T_HIGH_MSB      (ADT7320_L16 |0x04 )// Temperature HIGH setpoint MSB
#define ADT7420_REG_T_HIGH_LSB      0x05 // Temperature HIGH setpoint LSB
#define ADT7420_REG_T_LOW_MSB       (ADT7320_L16 |0x06) // Temperature LOW setpoint MSB
#define ADT7420_REG_T_LOW_LSB       0x07 // Temperature LOW setpoint LSB
#define ADT7420_REG_T_CRIT_MSB      (ADT7320_L16 |0x08) // Temperature CRIT setpoint MSB
#define ADT7420_REG_T_CRIT_LSB      0x09 // Temperature CRIT setpoint LSB
#define ADT7420_REG_HIST        0x0A // Temperature HYST setpoint
#define ADT7420_REG_ID          0x0B // ID
#define ADT7420_REG_RESET       0x2F // Software reset
 
/* ADT7420_REG_STATUS definition */
#define ADT7420_STATUS_T_LOW        NO_OS_BIT(4)
#define ADT7420_STATUS_T_HIGH       NO_OS_BIT(5)
#define ADT7420_STATUS_T_CRIT       NO_OS_BIT(6)
#define ADT7420_STATUS_RDY      NO_OS_BIT(7)
 
/* ADT7420_REG_CONFIG definition */
#define ADT7420_CONFIG_OP_MODE(x)   ((x) << 5) & (NO_OS_GENMASK(6,5))
#define ADT7420_CONFIG_RESOLUTION   NO_OS_BIT(7)
 
/* ADT7420 temperature conversion definitions */
#define ADT7420_16BIT_NEG           NO_OS_BIT(16)
#define ADT7420_16BIT_SIGN          0x8000
#define ADT7420_16BIT_DIV           128
#define ADT7420_13BIT_NEG           NO_OS_BIT(13)
#define ADT7420_13BIT_SIGN          0x1000
#define ADT7420_13BIT_DIV           16
 
/* ADT7420_CONFIG_OP_MODE(x) options */
#define ADT7420_OP_MODE_CONT_CONV   0
#define ADT7420_OP_MODE_ONE_SHOT    1
#define ADT7420_OP_MODE_1_SPS       2
#define ADT7420_OP_MODE_SHUTDOWN    3
 
/* ADT7420 default ID */
#define ADT7xxx_ID          0xC
 
#define ADT7420_RESET_DELAY         1
 
 
enum dev_interface {
    SPI,
    I2C,
};
enum dev_interface {…};
 
struct adt7420_chip_info {
    uint8_t         resolution;
    enum dev_interface  communication;
};
struct adt7420_chip_info {…};
 
enum adt7420_type {
    ID_ADT7410,
    ID_ADT7420,
    ID_ADT7422,
    ID_ADT7310,
    ID_ADT7311,
    ID_ADT7312,
    ID_ADT7320
};
enum adt7420_type {…};
 
struct adt7420_dev {
    /* I2C */
    struct no_os_i2c_desc *i2c_desc;
    /* SPI */
    struct no_os_spi_desc *spi_desc;
    /* Device Settings */
    enum adt7420_type active_device;
    /* Device Settings */
    uint8_t     resolution_setting;
 
};
struct adt7420_dev {…};
 
struct adt7420_init_param {
    union interface_type {
        /* I2C */
        struct no_os_i2c_init_param i2c_init;
        /* SPI */
        struct no_os_spi_init_param spi_init;
    } interface_init;
    union interface_type {…};
    /* Device Settings */
    uint8_t     resolution_setting;
    /* Device Settings */
    enum adt7420_type   active_device;
};
struct adt7420_init_param {…};
 
extern const struct adt7420_chip_info chip_info[];

int adt7420_reg_read(struct adt7420_dev *dev,
             uint16_t register_address, uint16_t *data);
 
/* Read-modify-write operation*/
int adt7420_reg_update_bits(struct adt7420_dev *dev,
                uint16_t register_address, uint8_t mask, uint8_t value);
 
/* Write to SPI register */
int adt7420_spi_reg_write(struct adt7420_dev *dev, uint16_t register_address,
              uint32_t data);
 
/* Write to I2C register */
int adt7420_i2c_reg_write(struct adt7420_dev *dev, uint16_t register_address,
              uint32_t data);
 
/*Sets register value*/
int adt7420_reg_write(struct adt7420_dev *dev,
              uint16_t register_address,
              uint32_t data);

int32_t adt7420_init(struct adt7420_dev **device,
             struct adt7420_init_param init_param);
 
/* Free the resources allocated by adt7420_init(). */
int32_t adt7420_remove(struct adt7420_dev *dev);

int adt7420_set_operation_mode(struct adt7420_dev *dev,
                   uint8_t mode);

int adt7420_set_resolution(struct adt7420_dev *dev,
               uint8_t resolution);

int32_t adt7420_reset(struct adt7420_dev *dev);

float adt7420_get_temperature(struct adt7420_dev *dev);

int adt7420_i2c_reg_read(struct adt7420_dev *dev,
             uint16_t register_address, uint16_t *data);

int adt7420_spi_reg_read(struct adt7420_dev *dev,
             uint16_t register_address, uint16_t *data);

bool adt7420_is_spi(struct adt7420_dev *dev);
 
#endif  /* __ADT7420_H__ */