ads1220.h File Reference

Driver for the ADS1220 24-bits ADC from TI SPI communication. More...

#include "std.h"
#include "math/pprz_algebra_int.h"
#include "mcu_periph/spi.h"

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Data Structures
struct	Ads1220Config
	ADS1220 configuration options. More...
struct	Ads1220

Macros
#define	ADS1220_BUFFER_LEN   5

Enumerations
enum	Ads1220ConfStatus { ADS1220_UNINIT = 0 , ADS1220_SEND_RESET , ADS1220_INITIALIZING , ADS1220_INITIALIZED }
enum	Ads1220Mux {   ADS1220_MUX_AIN0_AIN1 = 0 , ADS1220_MUX_AIN0_AIN2 , ADS1220_MUX_AIN0_AIN3 , ADS1220_MUX_AIN1_AIN2 ,   ADS1220_MUX_AIN1_AIN3 , ADS1220_MUX_AIN2_AIN3 , ADS1220_MUX_AIN1_AIN0 , ADS1220_MUX_AIN3_AIN2 ,   ADS1220_MUX_AIN0_AVSS , ADS1220_MUX_AIN1_AVSS , ADS1220_MUX_AIN2_AVSS , ADS1220_MUX_AIN3_AVSS ,   ADS1220_MUX_REFP_REFN , ADS1220_MUX_AVDD_AVSS , ADS1220_MUX_AVDD_AVSS_2 }
enum	Ads1220Gain {   ADS1220_GAIN_1 = 0 , ADS1220_GAIN_2 , ADS1220_GAIN_4 , ADS1220_GAIN_8 ,   ADS1220_GAIN_16 , ADS1220_GAIN_32 , ADS1220_GAIN_64 , ADS1220_GAIN_128 }
enum	Ads1220SampleRate { ADS1220_RATE_20_HZ = 0 , ADS1220_RATE_45_HZ , ADS1220_RATE_90_HZ , ADS1220_RATE_175_HZ }
enum	Ads1220ConvMode { ADS1220_SINGLE_SHOT = 0 , ADS1220_CONTINIOUS_CONVERSION }
enum	Ads1220VRef { ADS1220_VREF_INTERNAL = 0 , ADS1220_VREF_EXTERNAL_REF , ADS1220_VREF_EXTERNAL_AIN , ADS1220_VREF_VDD }
enum	Ads1220Idac {   ADS1220_IDAC_OFF = 0 , ADS1220_IDAC_10_uA , ADS1220_IDAC_50_uA , ADS1220_IDAC_100_uA ,   ADS1220_IDAC_250_uA , ADS1220_IDAC_500_uA , ADS1220_IDAC_1000_uA , ADS1220_IDAC_1500_uA }
enum	Ads1220Imux {   ADS1220_IMUX_OFF = 0 , ADS1220_IMUX_A0_RP1 , ADS1220_IMUX_A1 , ADS1220_IMUX_A2 ,   ADS1220_IMUX_A3_RN1 , ADS1220_IMUX_RP0 , ADS1220_IMUX_RN0 }

Functions
void	ads1220_init (struct Ads1220 *ads, struct spi_periph *spi_p, uint8_t slave_idx)
void	ads1220_configure (struct Ads1220 *ads)
void	ads1220_read (struct Ads1220 *ads)
void	ads1220_event (struct Ads1220 *ads)
static void	ads1220_periodic (struct Ads1220 *ads)
	convenience function: read or start configuration if not already initialized More...

Variables
static const float	Ads1220GainTable []

Detailed Description

Driver for the ADS1220 24-bits ADC from TI SPI communication.

Definition in file ads1220.h.

---

Data Structure Documentation

Ads1220Config

struct Ads1220Config

ADS1220 configuration options.

Definition at line 129 of file ads1220.h.

Data Fields
enum Ads1220ConvMode	conv	conversion mode
enum Ads1220Gain	gain	gain
enum Ads1220Imux	i1mux	IDAC routing 1.
enum Ads1220Imux	i2mux	IDAC routing 2.
enum Ads1220Idac	idac	IDAC config.
enum Ads1220Mux	mux	input multiplexer
bool	pga_bypass	bypass PGA (PGA enabled = 0)
enum Ads1220SampleRate	rate	data output rate
enum Ads1220ConfStatus	status	config status
enum Ads1220VRef	vref	voltage ref

Ads1220

struct Ads1220

Definition at line 151 of file ads1220.h.

Collaboration diagram for Ads1220:

Data Fields
struct Ads1220Config	config	configuration
uint32_t	data	raw ADC value
volatile bool	data_available	data ready flag
volatile uint8_t	rx_buf[ADS1220_BUFFER_LEN]	receive buffer
struct spi_periph *	spi_p	spi peripheral
struct spi_transaction	spi_trans	spi transaction
volatile uint8_t	tx_buf[ADS1220_BUFFER_LEN]	transmit buffer

Macro Definition Documentation

ADS1220_BUFFER_LEN

#define ADS1220_BUFFER_LEN   5

Definition at line 149 of file ads1220.h.

Enumeration Type Documentation

Ads1220ConfStatus

enum Ads1220ConfStatus

Enumerator
ADS1220_UNINIT
ADS1220_SEND_RESET
ADS1220_INITIALIZING
ADS1220_INITIALIZED

Definition at line 39 of file ads1220.h.

Ads1220ConvMode

enum Ads1220ConvMode

Enumerator
ADS1220_SINGLE_SHOT
ADS1220_CONTINIOUS_CONVERSION

Definition at line 91 of file ads1220.h.

Ads1220Gain

enum Ads1220Gain

Enumerator
ADS1220_GAIN_1
ADS1220_GAIN_2
ADS1220_GAIN_4
ADS1220_GAIN_8
ADS1220_GAIN_16
ADS1220_GAIN_32
ADS1220_GAIN_64
ADS1220_GAIN_128

Definition at line 66 of file ads1220.h.

Ads1220Idac

enum Ads1220Idac

Enumerator
ADS1220_IDAC_OFF
ADS1220_IDAC_10_uA
ADS1220_IDAC_50_uA
ADS1220_IDAC_100_uA
ADS1220_IDAC_250_uA
ADS1220_IDAC_500_uA
ADS1220_IDAC_1000_uA
ADS1220_IDAC_1500_uA

Definition at line 105 of file ads1220.h.

Ads1220Imux

enum Ads1220Imux

Enumerator
ADS1220_IMUX_OFF
ADS1220_IMUX_A0_RP1
ADS1220_IMUX_A1
ADS1220_IMUX_A2
ADS1220_IMUX_A3_RN1
ADS1220_IMUX_RP0
ADS1220_IMUX_RN0

Definition at line 117 of file ads1220.h.

Ads1220Mux

enum Ads1220Mux

Enumerator
ADS1220_MUX_AIN0_AIN1
ADS1220_MUX_AIN0_AIN2
ADS1220_MUX_AIN0_AIN3
ADS1220_MUX_AIN1_AIN2
ADS1220_MUX_AIN1_AIN3
ADS1220_MUX_AIN2_AIN3
ADS1220_MUX_AIN1_AIN0
ADS1220_MUX_AIN3_AIN2
ADS1220_MUX_AIN0_AVSS
ADS1220_MUX_AIN1_AVSS
ADS1220_MUX_AIN2_AVSS
ADS1220_MUX_AIN3_AVSS
ADS1220_MUX_REFP_REFN
ADS1220_MUX_AVDD_AVSS
ADS1220_MUX_AVDD_AVSS_2

Definition at line 47 of file ads1220.h.

Ads1220SampleRate

enum Ads1220SampleRate

Enumerator
ADS1220_RATE_20_HZ
ADS1220_RATE_45_HZ
ADS1220_RATE_90_HZ
ADS1220_RATE_175_HZ

Definition at line 83 of file ads1220.h.

Ads1220VRef

enum Ads1220VRef

Enumerator
ADS1220_VREF_INTERNAL
ADS1220_VREF_EXTERNAL_REF
ADS1220_VREF_EXTERNAL_AIN
ADS1220_VREF_VDD

Definition at line 97 of file ads1220.h.

Function Documentation

ads1220_configure()

void ads1220_configure

(

struct Ads1220 *

ads

)

Definition at line 102 of file ads1220.c.

References ADS1220_INITIALIZING, ADS1220_RESET, ads1220_send_config(), ADS1220_SEND_RESET, ADS1220_UNINIT, Ads1220::config, spi_transaction::input_length, spi_transaction::output_length, Ads1220::spi_p, spi_submit(), Ads1220::spi_trans, SPITransDone, SPITransSuccess, spi_transaction::status, Ads1220Config::status, and Ads1220::tx_buf.

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ads1220_event()

void ads1220_event

(

struct Ads1220 *

ads

)

Definition at line 130 of file ads1220.c.

References ADS1220_INITIALIZED, ADS1220_INITIALIZING, ADS1220_SEND_RESET, ADS1220_UNINIT, Ads1220::config, Ads1220::data, Ads1220::data_available, Ads1220::rx_buf, Ads1220::spi_trans, SPITransDone, SPITransFailed, SPITransSuccess, spi_transaction::status, and Ads1220Config::status.

Referenced by meteo_stick_event().

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ads1220_init()

void ads1220_init	(	struct Ads1220 *	ads,
		struct spi_periph *	spi_p,
		uint8_t	slave_idx
	)

Definition at line 49 of file ads1220.c.

References ADS1220_UNINIT, spi_transaction::after_cb, spi_transaction::before_cb, spi_transaction::bitorder, spi_transaction::cdiv, Ads1220::config, spi_transaction::cpha, spi_transaction::cpol, Ads1220::data, Ads1220::data_available, spi_transaction::dss, spi_transaction::input_buf, spi_transaction::input_length, spi_transaction::output_buf, spi_transaction::output_length, Ads1220::rx_buf, spi_transaction::select, spi_transaction::slave_idx, Ads1220::spi_p, Ads1220::spi_trans, SPICphaEdge2, SPICpolIdleLow, SPIDiv128, SPIDss8bit, SPIMSBFirst, SPISelectUnselect, SPITransDone, spi_transaction::status, Ads1220Config::status, and Ads1220::tx_buf.

Referenced by meteo_stick_init().

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ads1220_periodic()

static void ads1220_periodic ( struct Ads1220 *  ads )

inlinestatic

convenience function: read or start configuration if not already initialized

Definition at line 171 of file ads1220.h.

Referenced by meteo_stick_periodic().

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ads1220_read()

void ads1220_read

(

struct Ads1220 *

ads

)

Definition at line 120 of file ads1220.c.

References ADS1220_INITIALIZED, Ads1220::config, spi_transaction::input_length, spi_transaction::output_length, Ads1220::spi_p, spi_submit(), Ads1220::spi_trans, SPITransDone, spi_transaction::status, and Ads1220Config::status.

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Variable Documentation

Ads1220GainTable

const float Ads1220GainTable[]

static

Initial value:

= {
  1.0f, 2.0f, 4.0f, 8.0f, 16.0f, 32.0f, 64.0f, 128.0f
}

Definition at line 78 of file ads1220.h.

Referenced by get_diff(), and get_temp().