Union, Struct and Defined Data Types

SI473X data representation. More...

Data Structures
union	si473x_powerup
	Power Up arguments data type. More...
union	si473x_gpio
	Data type for Enables output for GPO1, GPO2 and GPO3. More...
union	si473x_gpio_ien
	Data type for Configuring the sources for the GPO2/INT interrupt pin. More...
union	si47x_frequency
	Represents how the frequency is stored in the si4735. More...
union	si47x_antenna_capacitor
	Antenna Tuning Capacitor data type manupulation. More...
union	si47x_set_frequency
	AM Tune frequency data type command (AM_TUNE_FREQ command) More...
union	si47x_seek
	Seek frequency (automatic tuning). ARG1. More...
struct	si47x_seek_am_complement
	Seek frequency (automatic tuning) AM complement (ARG2, ARG3, ARG4 and ARG5) More...
union	si47x_status
	Status response data representation. More...
union	si47x_response_status
	Response status command. More...
union	si47x_firmware_information
	Data representation for Firmware Information (GET_REV) More...
union	si47x_firmware_query_library
	Firmware Query Library ID response. More...
union	si47x_tune_status
	Seek station status. More...
union	si47x_property
	Data type to deal with SET_PROPERTY command. More...
union	si47x_rqs_status
	Radio Signal Quality data representation. More...
union	si47x_frontend_agc_control
	Adjusts the AM AGC for external front-end attenuator and external front-end cascode LNA. More...
union	si47x_rds_command
	Data type for RDS Status command and response information. More...
union	si47x_rds_status
	Response data type for current channel and reads an entry from the RDS FIFO. More...
union	si47x_rds_int_source
	FM_RDS_INT_SOURCE property data type. More...
union	si47x_rds_config
	Data type for FM_RDS_CONFIG Property. More...
union	si47x_rds_blocka
	Block A data type. More...
union	si47x_rds_blockb
	Block B data type. More...
union	si47x_rds_date_time
union	si47x_agc_status
union	si47x_agc_overrride
union	si47x_bandwidth_config
union	si47x_ssb_mode
union	si4735_digital_output_format
	Digital audio output format data structure (Property 0x0102. DIGITAL_OUTPUT_FORMAT). More...
union	si4735_eeprom_patch_header
	patch header stored in a eeprom More...
struct	si4735_digital_output_sample_rate
	Digital audio output sample structure (Property 0x0104. DIGITAL_OUTPUT_SAMPLE_RATE). More...
struct	si473x_powerup.arg
struct	si473x_gpio.arg
struct	si473x_gpio_ien.arg
struct	si47x_frequency.raw
struct	si47x_antenna_capacitor.raw
struct	si47x_set_frequency.arg
struct	si47x_seek.arg
struct	si47x_status.refined
struct	si47x_response_status.resp
struct	si47x_firmware_information.resp
struct	si47x_firmware_query_library.resp
struct	si47x_tune_status.arg
struct	si47x_property.raw
struct	si47x_rqs_status.resp
struct	si47x_frontend_agc_control.field
struct	si47x_rds_command.arg
struct	si47x_rds_status.resp
struct	si47x_rds_int_source.refined
struct	si47x_rds_config.arg
struct	si47x_rds_blocka.refined
struct	si47x_rds_blocka.raw
struct	si47x_rds_blockb.group0
struct	si47x_rds_blockb.group2
struct	si47x_rds_blockb.refined
struct	si47x_rds_blockb.raw
struct	si47x_rds_date_time.refined
struct	si47x_agc_status.refined
struct	si47x_agc_overrride.arg
struct	si47x_bandwidth_config.param
struct	si47x_ssb_mode.param
struct	si4735_digital_output_format.refined
struct	si4735_eeprom_patch_header.refined

Detailed Description

SI473X data representation.

Data Types

The goal of this approach is separating data from code. The Si47XX family works with many internal data that can be represented by data structure or defined data type in C/C++. These C/C++ resources have been used widely here. This approach made the library easier to build and maintain. Each data structure created here has its reference (name of the document and page on which it was based). In other words, to make the SI47XX device easier to deal, some defined data types were created to handle byte and bits to process commands, properties and responses. These data types will be usefull to deal with SI473X

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Data Structure Documentation

si473x_powerup

union si473x_powerup

Power Up arguments data type.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 64 and 65

Data Fields
struct si473x_powerup.arg	arg	Refined powerup parameters.
uint8_t	raw[2]	Raw powerup parameters data. Same arg memory position. So, same content.

si473x_gpio

union si473x_gpio

Data type for Enables output for GPO1, GPO2 and GPO3.

GPO1, 2, and 3 can be configured for output (Hi-Z or active drive) by setting the GPO1OEN, GPO2OEN, and GPO3OEN bit.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 82 and 144

Data Fields
struct si473x_gpio.arg	arg	Refined powerup parameters.
uint8_t	raw

si473x_gpio_ien

union si473x_gpio_ien

Data type for Configuring the sources for the GPO2/INT interrupt pin.

Valid sources are the lower 8 bits of the STATUS byte, including CTS, ERR, RSQINT, and STCINT bits.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 146

Data Fields
struct si473x_gpio_ien.arg	arg
uint16_t	raw

si47x_frequency

union si47x_frequency

Represents how the frequency is stored in the si4735.

It helps to convert frequency in uint16_t to two bytes (uint8_t) (FREQL and FREQH)

Data Fields
struct si47x_frequency.raw	raw	Raw data that represents the frequency stored in the Si47XX device.
uint16_t	value	frequency (integer value)

si47x_antenna_capacitor

union si47x_antenna_capacitor

Antenna Tuning Capacitor data type manupulation.

Data Fields
struct si47x_antenna_capacitor.raw	raw
uint16_t	value

si47x_set_frequency

union si47x_set_frequency

AM Tune frequency data type command (AM_TUNE_FREQ command)

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 135

Data Fields
struct si47x_set_frequency.arg	arg
uint8_t	raw[5]

si47x_seek

union si47x_seek

Seek frequency (automatic tuning). ARG1.

Represents searching for a valid frequency data type AM and FM.

When AM, the searching data have to be complemented by si47x_seek_am_complement.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 72 and 137

si47x_seek_am_complement

Data Fields
struct si47x_seek.arg	arg
uint8_t	raw

si47x_seek_am_complement

struct si47x_seek_am_complement

Seek frequency (automatic tuning) AM complement (ARG2, ARG3, ARG4 and ARG5)

Represents AM complement searching information for a valid frequency data type.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 72 and 137

Data Fields
uint8_t	ARG2
uint8_t	ARG3
uint8_t	ANTCAPH
uint8_t	ANTCAPL

si47x_status

union si47x_status

Status response data representation.

Represents searching for a valid frequency data type.

Data Fields
struct si47x_status.refined	refined
uint8_t	raw

si47x_response_status

union si47x_response_status

Response status command.

Response data from a query status command

See also

Si47XX PROGRAMMING GUIDE; pages 73 and

Data Fields
struct si47x_response_status.resp	resp
uint8_t	raw[8]	Check it.

si47x_firmware_information

union si47x_firmware_information

Data representation for Firmware Information (GET_REV)

The part number, chip revision, firmware revision, patch revision and component revision numbers.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 66 and 131

Data Fields
struct si47x_firmware_information.resp	resp
uint8_t	raw[9]

si47x_firmware_query_library

union si47x_firmware_query_library

Firmware Query Library ID response.

Used to represent the response of a power up command with FUNC = 15 (patch)

To confirm that the patch is compatible with the internal device library revision, the library revision should be confirmed by issuing the POWER_UP command with Function = 15 (query library ID)

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 12

Data Fields
struct si47x_firmware_query_library.resp	resp
uint8_t	raw[8]

si47x_tune_status

union si47x_tune_status

Seek station status.

Status of FM_TUNE_FREQ or FM_SEEK_START commands or Status of AM_TUNE_FREQ or AM_SEEK_START commands.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 73 and 139

Data Fields
struct si47x_tune_status.arg	arg
uint8_t	raw

si47x_property

union si47x_property

Data type to deal with SET_PROPERTY command.

Property Data type (help to deal with SET_PROPERTY command on si473X)

Data Fields
struct si47x_property.raw	raw
uint16_t	value

si47x_rqs_status

union si47x_rqs_status

Radio Signal Quality data representation.

Data type for status information about the received signal quality (FM_RSQ_STATUS and AM_RSQ_STATUS)

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 75 and

Data Fields
struct si47x_rqs_status.resp	resp
uint8_t	raw[8]

si47x_frontend_agc_control

union si47x_frontend_agc_control

Adjusts the AM AGC for external front-end attenuator and external front-end cascode LNA.

See also

Si47XX PROAMMING GUIDE; AN332 (REV 1.0); page 168

Data Fields
struct si47x_frontend_agc_control.field	field
uint16_t	word

si47x_rds_command

union si47x_rds_command

Data type for RDS Status command and response information.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 77 and 78

Also https://en.wikipedia.org/wiki/Radio_Data_System

Data Fields
struct si47x_rds_command.arg	arg
uint8_t	raw

si47x_rds_status

union si47x_rds_status

Response data type for current channel and reads an entry from the RDS FIFO.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 77 and 78

Data Fields
struct si47x_rds_status.resp	resp
uint8_t	raw[13]

si47x_rds_int_source

union si47x_rds_int_source

FM_RDS_INT_SOURCE property data type.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 103

also https://en.wikipedia.org/wiki/Radio_Data_System

Data Fields
struct si47x_rds_int_source.refined	refined
uint8_t	raw[2]

si47x_rds_config

union si47x_rds_config

Data type for FM_RDS_CONFIG Property.

IMPORTANT: all block errors must be less than or equal the associated block error threshold for the group to be stored in the RDS FIFO. 0 = No errors; 1 = 1–2 bit errors detected and corrected; 2 = 3–5 bit errors detected and corrected; 3 = Uncorrectable. Recommended Block Error Threshold options: 2,2,2,2 = No group stored if any errors are uncorrected. 3,3,3,3 = Group stored regardless of errors. 0,0,0,0 = No group stored containing corrected or uncorrected errors. 3,2,3,3 = Group stored with corrected errors on B, regardless of errors on A, C, or D.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 58 and 104

Data Fields
struct si47x_rds_config.arg	arg
uint8_t	raw[2]

si47x_rds_blocka

union si47x_rds_blocka

Block A data type.

Data Fields
struct si47x_rds_blocka.refined	refined
struct si47x_rds_blocka.raw	raw

si47x_rds_blockb

union si47x_rds_blockb

Block B data type.

For GCC on System-V ABI on 386-compatible (32-bit processors), the following stands:

1) Bit-fields are allocated from right to left (least to most significant). 2) A bit-field must entirely reside in a storage unit appropriate for its declared type. Thus a bit-field never crosses its unit boundary. 3) Bit-fields may share a storage unit with other struct/union members, including members that are not bit-fields. Of course, struct members occupy different parts of the storage unit. 4) Unnamed bit-fields' types do not affect the alignment of a structure or union, although individual bit-fields' member offsets obey the alignment constraints.

See also

also Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 78 and 79

also https://en.wikipedia.org/wiki/Radio_Data_System

Data Fields
struct si47x_rds_blockb.group0	group0
struct si47x_rds_blockb.group2	group2
struct si47x_rds_blockb.refined	refined
struct si47x_rds_blockb.raw	raw

si47x_rds_date_time

union si47x_rds_date_time

Group type 4A ( RDS Date and Time) When group type 4A is used by the station, it shall be transmitted every minute according to EN 50067. This Structure uses blocks 2,3 and 5 (B,C,D)

ATTENTION: To make it compatible with 8, 16 and 32 bits platforms and avoid Crosses boundary, it was necessary to split minute and hour representation.

Data Fields
struct si47x_rds_date_time.refined	refined
uint8_t	raw[6]

si47x_agc_status

union si47x_agc_status

AGC data types FM / AM and SSB structure to AGC

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); For FM page 80; for AM page 142

AN332 REV 0.8 Universal Programming Guide Amendment for SI4735-D60 SSB and NBFM patches; page 18.

Data Fields
struct si47x_agc_status.refined	refined
uint8_t	raw[3]

si47x_agc_overrride

union si47x_agc_overrride

If FM, Overrides AGC setting by disabling the AGC and forcing the LNA to have a certain gain that ranges between 0 (minimum attenuation) and 26 (maximum attenuation). If AM, overrides the AGC setting by disabling the AGC and forcing the gain index that ranges between 0

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); For FM page 81; for AM page 143

Data Fields
struct si47x_agc_overrride.arg	arg
uint8_t	raw[2]

si47x_bandwidth_config

union si47x_bandwidth_config

The bandwidth of the AM channel filter data type AMCHFLT values: 0 = 6 kHz Bandwidth 1 = 4 kHz Bandwidth 2 = 3 kHz Bandwidth 3 = 2 kHz Bandwidth 4 = 1 kHz Bandwidth 5 = 1.8 kHz Bandwidth 6 = 2.5 kHz Bandwidth, gradual roll off 7–15 = Reserved (Do not use)

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); pages 125 and 151

Data Fields
struct si47x_bandwidth_config.param	param
uint8_t	raw[2]

si47x_ssb_mode

union si47x_ssb_mode

SSB - datatype for SSB_MODE (property 0x0101)

See also

AN332 REV 0.8 UNIVERSAL PROGRAMMING GUIDE; page 24

Data Fields
struct si47x_ssb_mode.param	param
uint8_t	raw[2]

si4735_digital_output_format

union si4735_digital_output_format

Digital audio output format data structure (Property 0x0102. DIGITAL_OUTPUT_FORMAT).

Used to configure: DCLK edge, data format, force mono, and sample precision.

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 195.

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); chapter 9 - Digital Audio Interface

Data Fields
struct si4735_digital_output_format.refined	refined
uint16_t	raw

si4735_eeprom_patch_header

union si4735_eeprom_patch_header

patch header stored in a eeprom

This data type represents o header of a eeprom with a patch content

This structure will be used to read an eeprom generated by leo sketch SI47XX_09_SAVE_SSB_PATCH_EEPROM.ino.

The sketch SI47XX_09_SAVE_SSB_PATCH_EEPROM can be found on Examples/SI47XX_TOOLS folder

Data Fields
struct si4735_eeprom_patch_header.refined	refined
uint8_t	raw[32]

si4735_digital_output_sample_rate

struct si4735_digital_output_sample_rate

Digital audio output sample structure (Property 0x0104. DIGITAL_OUTPUT_SAMPLE_RATE).

Used to enable digital audio output and to configure the digital audio output sample rate in samples per second (sps).

See also

Si47XX PROGRAMMING GUIDE; AN332 (REV 1.0); page 196.

Data Fields
uint16_t	DOSR

si473x_powerup.arg

struct si473x_powerup.arg

Data Fields
uint8_t	FUNC: 4	Function (0 = FM Receive; 1–14 = Reserved; 15 = Query Library ID)
uint8_t	XOSCEN: 1	Crystal Oscillator Enable (0 = crystal oscillator disabled; 1 = Use crystal oscillator and and OPMODE=ANALOG AUDIO) .
uint8_t	PATCH: 1	Patch Enable (0 = Boot normally; 1 = Copy non-volatile memory to RAM).
uint8_t	GPO2OEN: 1	GPO2 Output Enable (0 = GPO2 output disabled; 1 = GPO2 output enabled).
uint8_t	CTSIEN: 1	CTS Interrupt Enable (0 = CTS interrupt disabled; 1 = CTS interrupt enabled).
uint8_t	OPMODE	Application Setting. See page 65.

si473x_gpio.arg

struct si473x_gpio.arg

Data Fields
uint8_t	DUMMY1: 1	Always write 0.
uint8_t	GPO1OEN: 1	GPO1 Output Enable.
uint8_t	GPO2OEN: 1	GPO2 Output Enable.
uint8_t	GPO3OEN: 1	GPO3 Output Enable.
uint8_t	DUMMY2: 4	Always write 0.

si473x_gpio_ien.arg

struct si473x_gpio_ien.arg

Data Fields
uint8_t	STCIEN: 1	Seek/Tune Complete Interrupt Enable (0 or 1).
uint8_t	DUMMY1: 2	Always write 0.
uint8_t	RSQIEN: 1	RSQ Interrupt Enable (0 or 1).
uint8_t	DUMMY2: 2	Always write 0.
uint8_t	ERRIEN: 1	ERR Interrupt Enable (0 or 1).
uint8_t	CTSIEN: 1	CTS Interrupt Enable (0 or 1).
uint8_t	STCREP: 1	STC Interrupt Repeat (0 or 1).
uint8_t	DUMMY3: 2	Always write 0.
uint8_t	RSQREP: 1	RSQ Interrupt Repeat (0 or 1).
uint8_t	DUMMY4: 4	Always write 0.

si47x_frequency.raw

struct si47x_frequency.raw

Data Fields
uint8_t	FREQL	Tune Frequency Low byte.
uint8_t	FREQH	Tune Frequency High byte.

si47x_antenna_capacitor.raw

struct si47x_antenna_capacitor.raw

Data Fields
uint8_t	ANTCAPL	Antenna Tuning Capacitor High byte.
uint8_t	ANTCAPH	Antenna Tuning Capacitor Low byte.

si47x_set_frequency.arg

struct si47x_set_frequency.arg

Data Fields
uint8_t	FAST: 1	ARG1 - FAST Tuning. If set, executes fast and invalidated tune. The tune status will not be accurate.
uint8_t	FREEZE: 1	Valid only for FM (Must be 0 to AM)
uint8_t	DUMMY1: 4	Always set 0.
uint8_t	USBLSB: 2	SSB Upper Side Band (USB) and Lower Side Band (LSB) Selection. 10 = USB is selected; 01 = LSB is selected.
uint8_t	FREQH	ARG2 - Tune Frequency High byte.
uint8_t	FREQL	ARG3 - Tune Frequency Low byte.
uint8_t	ANTCAPH	ARG4 - Antenna Tuning Capacitor High byte.
uint8_t	ANTCAPL	ARG5 - Antenna Tuning Capacitor Low byte. Note used for FM.

si47x_seek.arg

struct si47x_seek.arg

Data Fields
uint8_t	RESERVED1: 2
uint8_t	WRAP: 1	Determines whether the seek should Wrap = 1, or Halt = 0 when it hits the band limit.
uint8_t	SEEKUP: 1	Determines the direction of the search, either UP = 1, or DOWN = 0.
uint8_t	RESERVED2: 4

si47x_status.refined

struct si47x_status.refined

Data Fields
uint8_t	STCINT: 1	1 = Tune complete has been triggered.
uint8_t	DUMMY1: 1	Reserved (Values may vary).
uint8_t	RDSINT: 1	1 = Radio data system interrupt has been triggered.
uint8_t	RSQINT: 1	1 = Received Signal Quality measurement has been triggered.
uint8_t	DUMMY2: 2	Reserved (Values may vary).
uint8_t	ERR: 1	1 = Error.
uint8_t	CTS: 1	0 = Wait before sending next command; 1 = Clear to send next command.

si47x_response_status.resp

struct si47x_response_status.resp

Data Fields
uint8_t	STCINT: 1	Seek/Tune Complete Interrupt; 1 = Tune complete has been triggered.
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1	Radio Data System (RDS) Interrup; 0 = interrupt has not been triggered.
uint8_t	RSQINT: 1	Received Signal Quality Interrupt; 0 = interrupt has not been triggered.
uint8_t	DUMMY2: 2
uint8_t	ERR: 1	Error. 0 = No error 1 = Error.
uint8_t	CTS: 1	Clear to Send.
uint8_t	VALID: 1	Valid Channel.
uint8_t	AFCRL: 1	AFC Rail Indicator.
uint8_t	DUMMY3: 5
uint8_t	BLTF: 1	Reports if a seek hit the band limit.
uint8_t	READFREQH	Read Frequency High byte.
uint8_t	READFREQL	Read Frequency Low byte.
uint8_t	RSSI	Received Signal Strength Indicator (dBμV)
uint8_t	SNR	This byte contains the SNR metric when tune is complete (dB).
uint8_t	MULT	If FM, contains the multipath metric when tune is complete; IF AM READANTCAPH (tuning capacitor value high byte)
uint8_t	READANTCAP	If FM, contains the current antenna tuning capacitor value; IF AM READANTCAPL (tuning capacitor value low byte)

si47x_firmware_information.resp

struct si47x_firmware_information.resp

Data Fields
uint8_t	STCINT: 1
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1
uint8_t	RSQINT: 1
uint8_t	DUMMY2: 2
uint8_t	ERR: 1
uint8_t	CTS: 1
uint8_t	PN	RESP1 - Final 2 digits of Part Number (HEX).
uint8_t	FWMAJOR	RESP2 - Firmware Major Revision (ASCII).
uint8_t	FWMINOR	RESP3 - Firmware Minor Revision (ASCII).
uint8_t	PATCHH	RESP4 - Patch ID High byte (HEX).
uint8_t	PATCHL	RESP5 - Patch ID Low byte (HEX).
uint8_t	CMPMAJOR	RESP6 - Component Major Revision (ASCII).
uint8_t	CMPMINOR	RESP7 - Component Minor Revision (ASCII).
uint8_t	CHIPREV	RESP8 - Chip Revision (ASCII).

si47x_firmware_query_library.resp

struct si47x_firmware_query_library.resp

Data Fields
uint8_t	STCINT: 1
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1
uint8_t	RSQINT: 1
uint8_t	DUMMY2: 2
uint8_t	ERR: 1
uint8_t	CTS: 1
uint8_t	PN	RESP1 - Final 2 digits of Part Number (HEX).
uint8_t	FWMAJOR	RESP2 - Firmware Major Revision (ASCII).
uint8_t	FWMINOR	RESP3 - Firmware Minor Revision (ASCII).
uint8_t	RESERVED1	RESP4 - Reserved, various values.
uint8_t	RESERVED2	RESP5 - Reserved, various values.
uint8_t	CHIPREV	RESP6 - Chip Revision (ASCII).
uint8_t	LIBRARYID	RESP7 - Library Revision (HEX).

si47x_tune_status.arg

struct si47x_tune_status.arg

Data Fields
uint8_t	INTACK: 1	If set, clears the seek/tune complete interrupt status indicator.
uint8_t	CANCEL: 1	If set, aborts a seek currently in progress.
uint8_t	RESERVED2: 6

si47x_property.raw

struct si47x_property.raw

Data Fields
uint8_t	byteLow
uint8_t	byteHigh

si47x_rqs_status.resp

struct si47x_rqs_status.resp

Data Fields
uint8_t	STCINT: 1
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1
uint8_t	RSQINT: 1
uint8_t	DUMMY2: 2
uint8_t	ERR: 1
uint8_t	CTS: 1
uint8_t	RSSIILINT: 1	RSSI Detect Low.
uint8_t	RSSIHINT: 1	RSSI Detect High.
uint8_t	SNRLINT: 1	SNR Detect Low.
uint8_t	SNRHINT: 1	SNR Detect High.
uint8_t	MULTLINT: 1	Multipath Detect Low.
uint8_t	MULTHINT: 1	Multipath Detect High.
uint8_t	DUMMY3: 1
uint8_t	BLENDINT: 1	Blend Detect Interrupt.
uint8_t	VALID: 1	Valid Channel.
uint8_t	AFCRL: 1	AFC Rail Indicator.
uint8_t	DUMMY4: 1
uint8_t	SMUTE: 1	Soft Mute Indicator. Indicates soft mute is engaged.
uint8_t	DUMMY5: 4
uint8_t	STBLEND: 7	Indicates amount of stereo blend in% (100 = full stereo, 0 = full mono).
uint8_t	PILOT: 1	Indicates stereo pilot presence.
uint8_t	RSSI	RESP4 - Contains the current receive signal strength (0–127 dBμV).
uint8_t	SNR	RESP5 - Contains the current SNR metric (0–127 dB).
uint8_t	MULT	RESP6 - Contains the current multipath metric. (0 = no multipath; 100 = full multipath)
uint8_t	FREQOFF	RESP7 - Signed frequency offset (kHz).

si47x_frontend_agc_control.field

struct si47x_frontend_agc_control.field

Data Fields
uint8_t	ATTN_BACKUP
uint8_t	MIN_GAIN_INDEX

si47x_rds_command.arg

struct si47x_rds_command.arg

Data Fields
uint8_t	INTACK: 1
uint8_t	MTFIFO: 1
uint8_t	STATUSONLY: 1
uint8_t	dummy: 5

si47x_rds_status.resp

struct si47x_rds_status.resp

Data Fields
uint8_t	STCINT: 1
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1
uint8_t	RSQINT: 1
uint8_t	DUMMY2: 2
uint8_t	ERR: 1
uint8_t	CTS: 1
uint8_t	RDSRECV: 1	RDS Received; 1 = FIFO filled to minimum number of groups set by RDSFIFOCNT.
uint8_t	RDSSYNCLOST: 1	RDS Sync Lost; 1 = Lost RDS synchronization.
uint8_t	RDSSYNCFOUND: 1	RDS Sync Found; 1 = Found RDS synchronization.
uint8_t	DUMMY3: 1
uint8_t	RDSNEWBLOCKA: 1	RDS New Block A; 1 = Valid Block A data has been received.
uint8_t	RDSNEWBLOCKB: 1	RDS New Block B; 1 = Valid Block B data has been received.
uint8_t	DUMMY4: 2
uint8_t	RDSSYNC: 1	RDS Sync; 1 = RDS currently synchronized.
uint8_t	DUMMY5: 1
uint8_t	GRPLOST: 1	Group Lost; 1 = One or more RDS groups discarded due to FIFO overrun.
uint8_t	DUMMY6: 5
uint8_t	RDSFIFOUSED	RESP3 - RDS FIFO Used; Number of groups remaining in the RDS FIFO (0 if empty).
uint8_t	BLOCKAH	RESP4 - RDS Block A; HIGH byte.
uint8_t	BLOCKAL	RESP5 - RDS Block A; LOW byte.
uint8_t	BLOCKBH	RESP6 - RDS Block B; HIGH byte.
uint8_t	BLOCKBL	RESP7 - RDS Block B; LOW byte.
uint8_t	BLOCKCH	RESP8 - RDS Block C; HIGH byte.
uint8_t	BLOCKCL	RESP9 - RDS Block C; LOW byte.
uint8_t	BLOCKDH	RESP10 - RDS Block D; HIGH byte.
uint8_t	BLOCKDL	RESP11 - RDS Block D; LOW byte.
uint8_t	BLED: 2
uint8_t	BLEC: 2
uint8_t	BLEB: 2
uint8_t	BLEA: 2

si47x_rds_int_source.refined

struct si47x_rds_int_source.refined

Data Fields
uint8_t	RDSRECV: 1	If set, generate RDSINT when RDS FIFO has at least FM_RDS_INT_FIFO_COUNT entries.
uint8_t	RDSSYNCLOST: 1	If set, generate RDSINT when RDS loses synchronization.
uint8_t	RDSSYNCFOUND: 1	f set, generate RDSINT when RDS gains synchronization.
uint8_t	DUMMY1: 1	Always write to 0.
uint8_t	RDSNEWBLOCKA: 1	If set, generate an interrupt when Block A data is found or subsequently changed.
uint8_t	RDSNEWBLOCKB: 1	If set, generate an interrupt when Block B data is found or subsequently changed.
uint8_t	DUMMY2: 5	Reserved - Always write to 0.
uint8_t	DUMMY3: 5	Reserved - Always write to 0.

si47x_rds_config.arg

struct si47x_rds_config.arg

Data Fields
uint8_t	RDSEN: 1	1 = RDS Processing Enable.
uint8_t	DUMMY1: 7
uint8_t	BLETHD: 2	Block Error Threshold BLOCKD.
uint8_t	BLETHC: 2	Block Error Threshold BLOCKC.
uint8_t	BLETHB: 2	Block Error Threshold BLOCKB.
uint8_t	BLETHA: 2	Block Error Threshold BLOCKA.

si47x_rds_blocka.refined

struct si47x_rds_blocka.refined

Data Fields
uint16_t	pi

si47x_rds_blocka.raw

struct si47x_rds_blocka.raw

Data Fields
uint8_t	highValue
uint8_t	lowValue

si47x_rds_blockb.group0

struct si47x_rds_blockb.group0

Data Fields
uint16_t	address: 2
uint16_t	DI: 1
uint16_t	MS: 1
uint16_t	TA: 1
uint16_t	programType: 5
uint16_t	trafficProgramCode: 1
uint16_t	versionCode: 1
uint16_t	groupType: 4

si47x_rds_blockb.group2

struct si47x_rds_blockb.group2

Data Fields
uint16_t	address: 4
uint16_t	textABFlag: 1
uint16_t	programType: 5
uint16_t	trafficProgramCode: 1
uint16_t	versionCode: 1
uint16_t	groupType: 4

si47x_rds_blockb.refined

struct si47x_rds_blockb.refined

Data Fields
uint16_t	content: 4
uint16_t	textABFlag: 1
uint16_t	programType: 5
uint16_t	trafficProgramCode: 1
uint16_t	versionCode: 1
uint16_t	groupType: 4

si47x_rds_blockb.raw

struct si47x_rds_blockb.raw

Data Fields
uint8_t	lowValue
uint8_t	highValue

si47x_rds_date_time.refined

struct si47x_rds_date_time.refined

Data Fields
uint32_t	offset: 5
uint32_t	offset_sense: 1
uint32_t	minute: 6
uint32_t	hour: 5
uint32_t	mjd: 17

si47x_agc_status.refined

struct si47x_agc_status.refined

Data Fields
uint8_t	STCINT: 1
uint8_t	DUMMY1: 1
uint8_t	RDSINT: 1
uint8_t	RSQINT: 1
uint8_t	DUMMY2: 2
uint8_t	ERR: 1
uint8_t	CTS: 1
uint8_t	AGCDIS: 1
uint8_t	DUMMY: 7
uint8_t	AGCIDX

si47x_agc_overrride.arg

struct si47x_agc_overrride.arg

Data Fields
uint8_t	AGCDIS: 1
uint8_t	DUMMY: 7
uint8_t	AGCIDX

si47x_bandwidth_config.param

struct si47x_bandwidth_config.param

Data Fields
uint8_t	AMCHFLT: 4	Selects the bandwidth of the AM channel filter.
uint8_t	DUMMY1: 4
uint8_t	AMPLFLT: 1	Enables the AM Power Line Noise Rejection Filter.
uint8_t	DUMMY2: 7

si47x_ssb_mode.param

struct si47x_ssb_mode.param

Data Fields
uint8_t	AUDIOBW: 4	0 = 1.2kHz (default); 1=2.2kHz; 2=3kHz; 3=4kHz; 4=500Hz; 5=1kHz
uint8_t	SBCUTFLT: 4	SSB side band cutoff filter for band passand low pass filter.
uint8_t	AVC_DIVIDER: 4	set 0 for SSB mode; set 3 for SYNC mode;
uint8_t	AVCEN: 1	SSB Automatic Volume Control (AVC) enable; 0=disable; 1=enable (default);.
uint8_t	SMUTESEL: 1	SSB Soft-mute Based on RSSI or SNR.
uint8_t	DUMMY1: 1	Always write 0;.
uint8_t	DSP_AFCDIS: 1	0=SYNC MODE, AFC enable; 1=SSB MODE, AFC disable.

si4735_digital_output_format.refined

struct si4735_digital_output_format.refined

Data Fields
uint8_t	OSIZE: 2	Digital Output Audio Sample Precision (0=16 bits, 1=20 bits, 2=24 bits, 3=8bits).
uint8_t	OMONO: 1	Digital Output Mono Mode (0=Use mono/stereo blend ).
uint8_t	OMODE: 4	Digital Output Mode (0000=I2S, 0110 = Left-justified, 1000 = MSB at second DCLK after DFS pulse, 1100 = MSB at first DCLK after DFS pulse).
uint8_t	OFALL: 1	Digital Output DCLK Edge (0 = use DCLK rising edge, 1 = use DCLK falling edge)
uint8_t	dummy: 8	Always 0.

si4735_eeprom_patch_header.refined

struct si4735_eeprom_patch_header.refined

Data Fields
uint8_t	reserved[8]
uint8_t	status[8]
uint8_t	patch_id[14]
uint16_t	patch_size