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This version (22 Jul 2019 13:27) was approved by Andrei Drimbarean.The Previously approved version (17 Nov 2016 17:04) is available.Diff

Table of Contents

AD4110 - No-OS Driver

Supported Devices

Overview

The AD4110 is a complete, single-channel, universal input analog-to-digital front end for industrial process control systems where sensor type flexibility is required.

The high voltage input is fully software configurable for current or voltage ranges and allow direct interface to all standard industrial analog signal sources such as, ±20 mA, ±4 mA to ±20 mA, ±10 V, and all thermocouple types. Field power can be supplied for loop powered current output sensors. A range of excitation current sources for RTD sensors and other resistive sensors are included. The integrated programmable gain amplifier, PGA, offers sixteen gain settings from 0.2 to 24.

The high voltage input can be programmed to power up in either voltage or current mode. When programmed to current mode, the unique input circuit architecture provides a path for the loop current even in the absence of the system module power supply.

The AD4110 provides internal front-end diagnostic functions to indicate overvoltage, undervoltage, open wire, overcurrent and overtemperature conditions. The high voltage input is overcurrent limited and overvoltage protected up to ±35 V.

The AD4110 incorporates a 24-bit sigma delta analog to digital converter offering conversion rates from 5 SPS to 125 kSPS with simultaneous 50 Hz and 60 Hz noise rejection.

Applications:

  • Industrial process control (PLC, DCS)
  • Data acquisition

Driver Description

Functions Declarations

Function Description 
uint8_t ad4110_compute_crc8(uint8_t *data, uint8_t data_size);
 Compute CRC8 checksum. 
uint8_t ad4110_compute_xor(uint8_t *data, uint8_t data_size);
 Compute XOR checksum. 
int32_t ad4110_spi_int_reg_write_msk(ad4110_dev *dev, uint8_t reg_map, uint8_t reg_addr, uint32_t data, uint16_t mask);
 SPI write to device using a mask. 
int32_t ad4110_set_adc_mode(ad4110_dev *dev, ad4110_adc_mode mode);
 Set the mode of the ADC. 
int32_t ad4110_set_gain(ad4110_dev *dev, ad4110_gain gain);
 Set the gain. 
int32_t ad4110_set_op_mode(ad4110_dev *dev, ad4110_op_mode mode);
 Set the operation mode. 
int32_t ad4110_spi_do_soft_reset(ad4110_dev *dev);
 Do a SPI software reset. 
uint8_t ad4110_get_data_size(ad4110_dev *dev, uint8_t reg_map, uint8_t reg_addr);
 Get the data size of a specified register. 
int32_t ad4110_spi_int_reg_write(ad4110_dev *dev, uint8_t reg_map, uint8_t reg_addr, uint32_t reg_data);
SPI internal register write to device. 
int32_t ad4110_spi_int_reg_read(ad4110_dev *dev, uint8_t reg_map, uint8_t reg_addr, uint32_t *reg_data);
SPI internal register read from device. 
int32_t ad4110_setup(ad4110_dev **device, ad4110_init_param init_param);
 Initialize the device.

Types Declarations

typedef enum {
	AD4110_DISABLE,
	AD4110_ENABLE
} ad4110_state;
 
typedef enum {
	AD4110_DATA_WL24,
	AD4110_DATA_WL16,
} ad4110_data_word_length;
 
typedef enum {
	AD4110_CONTINOUS_CONV_MODE,
	AD4110_SINGLE_CONV_MODE,
	AD4110_STANDBY_MODE,
	AD4110_PW_DOWN_MODE,
	AD4110_SYS_OFFSET_CAL = 6,
	AD4110_SYS_GAIN_CAL
} ad4110_adc_mode;
 
typedef enum {
	AD4110_VOLTAGE_MODE,
	AD4110_CURRENT_MODE,
	AD4110_CURRENT_MODE_EXT_R_SEL,
	AD4110_THERMOCOUPLE,
	AD4110_FLD_POWER_MODE,
	AD4110_RTD_2W_MODE,
	AD4110_RTD_3W_MODE,
	AD4110_RTD_4W_MODE	
} ad4110_op_mode;
 
typedef enum {
	AD4110_ADC_CRC_DISABLE,
	AD4110_ADC_XOR_CRC, // 8-bit XOR checksum on reads, 8-bit CRC on writes	
	AD4110_ADC_CRC_CRC // 8-bit CRC on reads and writes.
}ad4110_adc_crc_mode;
 
typedef enum {
	AD4110_AFE_CRC_DISABLE,
	AD4110_AFE_CRC 	// 8-bit CRC on reads and writes.
}ad4110_afe_crc_mode;
 
typedef enum{
	AD4110_GAIN_0_2,
	AD4110_GAIN_0_25,
	AD4110_GAIN_0_3,
	AD4110_GAIN_0_375,
	AD4110_GAIN_0_5,
	AD4110_GAIN_0_75,
	AD4110_GAIN_1,
	AD4110_GAIN_1_5,
	AD4110_GAIN_2,
	AD4110_GAIN_3,
	AD4110_GAIN_4,
	AD4110_GAIN_6,
	AD4110_GAIN_8,
	AD4110_GAIN_12,
	AD4110_GAIN_16,
	AD4110_GAIN_24
}ad4110_gain;
 
typedef struct {
	/* SPI */
	spi_device					spi_dev;
	/* GPIO */
	gpio_device					gpio_dev;
	int8_t						gpio_reset;
	/* Device Settings */
	ad4110_state				data_stat;
	ad4110_data_word_length 	data_length;
	ad4110_adc_crc_mode 		adc_crc_en;
	ad4110_afe_crc_mode			afe_crc_en;
	ad4110_op_mode 				op_mode;
	ad4110_gain 				gain;
} ad4110_dev;
 
typedef struct {
	/* SPI */
	uint8_t						spi_chip_select;
	spi_mode					spi_mode;
	spi_type					spi_type;
	uint32_t					spi_device_id;
	/* GPIO */
	gpio_type					gpio_type;
	uint32_t					gpio_device_id;
	int8_t						gpio_reset;
	/* Device Settings */
	ad4110_state				data_stat;
	ad4110_data_word_length 	data_length;
	ad4110_afe_crc_mode			afe_crc_en;
	ad4110_adc_crc_mode			adc_crc_en;
	ad4110_op_mode 				op_mode;
	ad4110_gain 				gain;
} ad4110_init_param;

Downloads

resources/tools-software/uc-drivers/ad4110.txt · Last modified: 22 Jul 2019 13:27 by Andrei Drimbarean

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