ad5449.h

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/***************************************************************************/
/*****************************************************************************/
/***************************** Include Files *********************************/
/*****************************************************************************/
#include <stdint.h>
#include "no_os_gpio.h"
#include "no_os_spi.h"
 
/******************************************************************************/
/*************************** Types Declarations *******************************/
/******************************************************************************/
enum bool_t {
    false,
    true
};
 
/* Supported devices */
enum ad5449_type_t {
    ID_AD5415,
    ID_AD5426,
    ID_AD5429,
    ID_AD5432,
    ID_AD5439,
    ID_AD5443,
    ID_AD5449,
};
 
struct ad5449_chip_info {
    uint8_t num_channels;
    uint8_t resolution;
    enum bool_t has_ctrl;
};
 
struct ad5449_dev {
    /* SPI */
    struct no_os_spi_desc   *spi_desc;
    /* GPIO */
    struct no_os_gpio_desc  *gpio_ldac;
    struct no_os_gpio_desc  *gpio_clr;
    /* Device Settings */
    enum ad5449_type_t      act_device;
    uint16_t        control_reg;
};
 
struct ad5449_init_param {
    /* SPI */
    struct no_os_spi_init_param spi_init;
    /* GPIO */
    struct no_os_gpio_init_param    gpio_ldac;
    struct no_os_gpio_init_param    gpio_clr;
    /* Device Settings */
    enum ad5449_type_t  act_device;
};
 
/* Control Bits */
#define AD5449_CTRL_NOP             0
#define AD5449_CTRL_LOADUPDATE(x)   (1 + 3 * (x))
#define AD5449_CTRL_READBACK(x)     (2 + 3 * (x))
#define AD5449_CTRL_LOAD(x)         (3 + 3 * (x))
#define AD5449_CTRL_UPDATEALL       7
#define AD5449_CTRL_LOADALL         8
#define AD5449_CTRL_DAISY_CHAIN     9
#define AD5449_CTRL_CLK_EDGE        10
#define AD5449_CTRL_CLR_ZERO        11
#define AD5449_CTRL_CLR_MID         12
#define AD5449_CTRL_REG             13
 
/* AD5449 channels */
#define AD5449_CH_A                 0
#define AD5449_CH_B                 1
 
/* Clear target scales */
#define AD5449_ZERO_SCALE            0
#define AD5449_MID_SCALE             1
 
/* Active clock edge */
#define AD5449_CLOCK_NEGEDGE         0
#define AD5449_CLOCK_POSEDGE         1
 
/* Daisy-Chain Control */
#define AD5449_DAISY_CHAIN_DIS       0
#define AD5449_DAISY_CHAIN_EN        1
 
/* AD5449_CTRL_REG definition */
#define AD5449_SDO_MASK          (3 << 10)
#define AD5449_DSY_MASK          (1 << 9)
#define AD5449_HCLR_MASK         (1 << 8)
#define AD5449_SCLK_MASK         (1 << 7)
#define AD5449_SDO_BIT           10
#define AD5449_DSY_BIT           9
#define AD5449_HCLR_BIT          8
#define AD5449_SCLK_BIT          7
 
/* AD5449 GPIO */
#define AD5449_LDAC_OUT             no_os_gpio_direction_output(dev->gpio_ldac,   \
                        NO_OS_GPIO_HIGH)
#define AD5449_LDAC_LOW             no_os_gpio_set_value(dev->gpio_ldac,          \
                        NO_OS_GPIO_LOW)
#define AD5449_LDAC_HIGH            no_os_gpio_set_value(dev->gpio_ldac,          \
                        NO_OS_GPIO_HIGH)
 
#define AD5449_CLR_OUT              no_os_gpio_direction_output(dev->gpio_clr,   \
                        NO_OS_GPIO_HIGH)
#define AD5449_CLR_LOW              no_os_gpio_set_value(dev->gpio_clr,          \
                        NO_OS_GPIO_LOW)
#define AD5449_CLR_HIGH             no_os_gpio_set_value(dev->gpio_clr,          \
                        NO_OS_GPIO_HIGH)
 
/* SDO Control Bits */
#define AD5449_SDO_FULL             0
#define AD5449_SDO_WEAK             1
#define AD5449_SDO_OPEN_DRAIN       2
#define AD5449_SDO_DISABLE          3
 
/******************************************************************************/
/************************ Functions Declarations ******************************/
/******************************************************************************/
 
/* Initialize SPI and Initial Values for AD5449 Board. */
int8_t ad5449_init(struct ad5449_dev **device,
           struct ad5449_init_param init_param);
 
/* Free the resources allocated by AD5449_Init(). */
int32_t ad5449_remove(struct ad5449_dev *dev);
 
/* Write to shift register via SPI. */
uint16_t ad5449_set_input_shift_reg(struct ad5449_dev *dev,
                    uint16_t command,
                    uint16_t data);
 
/* Load and updates the selected DAC with a given value. */
void ad5449_load_update_channel(struct ad5449_dev *dev,
                uint8_t channel,
                uint16_t dac_value);
 
/* Load selected DAC input register with a given value. */
void ad5449_load_channel(struct ad5449_dev *dev,
             uint8_t channel,
             uint16_t dac_value);
 
/* Read from the selected DAC register. */
uint16_t ad5449_readback_channel(struct ad5449_dev *dev,
                 uint8_t channel);
 
/* Update the DAC outputs (all channels). */
void ad5449_update_all(struct ad5449_dev *dev);
 
/* Load the DAC input registers. */
void ad5449_load_all(struct ad5449_dev *dev,
             int16_t dac_value);
 
/* Set up the scale where to the output will be cleared on active CLR signal */
void ad5449_clear_scale_setup(struct ad5449_dev *dev,
                  int8_t type);
 
/* Enable/disable the Daisy-Chain mode */
void ad5449_daisy_chain_setup(struct ad5449_dev *dev,
                  int8_t value);
 
/* Control the SDO output driver strength */
void ad5449_sdocontrol(struct ad5449_dev *dev,
               int8_t control_bits);
 
/* Set up the active clock edge of the SPI interface */
void ad5449_sclksetup(struct ad5449_dev *dev,
              int8_t value);