Radio Configuration

Routines for setting up and querying radio configuration information.

Modules

EFR32
Types specific to the EFR32 for radio configuration.

Data Structures

struct  RAIL_FrameType_t
 Configures if there is a frame type in your frame and the lengths of each frame.
 
struct  RAIL_ChannelConfigEntryAttr_t
 A channel configuration entry attribute structure.
 
struct  RAIL_ChannelConfigEntry_t
 A channel configuration entry structure, which defines a channel range and parameters across which a corresponding radio configuration is valid.
 
struct  RAIL_ChannelConfig_t
 A channel configuration structure, which defines the channel meaning when a channel number is passed into a RAIL function, e.g., RAIL_StartTx() and RAIL_StartRx().

Macros

#define RAIL_SETFIXEDLENGTH_INVALID   (0xFFFFU)
 An invalid return value when calling RAIL_SetFixedLength().

Typedefs

typedef void(* RAIL_RadioConfigChangedCallback_t) (RAIL_Handle_t railHandle, const RAIL_ChannelConfigEntry_t *entry)
 A pointer to a function called whenever a radio configuration change occurs.

Functions

RAIL_Status_t RAIL_ConfigRadio (RAIL_Handle_t railHandle, RAIL_RadioConfig_t config)
 Loads a static radio configuration.
 
uint16_t RAIL_SetFixedLength (RAIL_Handle_t railHandle, uint16_t length)
 Modifies the currently configured fixed frame length in bytes.
 
uint16_t RAIL_ConfigChannels (RAIL_Handle_t railHandle, const RAIL_ChannelConfig_t *config, RAIL_RadioConfigChangedCallback_t cb)
 Configures the channels supported by this device.
 
RAIL_Status_t RAIL_IsValidChannel (RAIL_Handle_t railHandle, uint16_t channel)
 Checks to see if the channel exists in RAIL.
 
RAIL_Status_t RAIL_PrepareChannel (RAIL_Handle_t railHandle, uint16_t channel)
 Causes radio settings associated with a particular channel to be applied to hardware.
 
RAIL_Status_t RAIL_GetChannel (RAIL_Handle_t railHandle, uint16_t *channel)
 Returns the current RAIL channel.
 
uint32_t RAIL_GetSymbolRate (RAIL_Handle_t railHandle)
 Returns the symbol rate for the current PHY.
 
uint32_t RAIL_GetBitRate (RAIL_Handle_t railHandle)
 Returns the bit rate for the current PHY.
 
RAIL_Status_t RAIL_SetPaCTune (RAIL_Handle_t railHandle, uint8_t txPaCtuneValue, uint8_t rxPaCtuneValue)
 Sets the PA capacitor tune value for transmit and receive.

Detailed Description

Routines for setting up and querying radio configuration information.

These routines allow for runtime flexibility in the radio configuration. Some of the parameters, however, are meant to be generated from the radio calculator in Simplicity Studio. The basic code to configure the radio from this calculator output looks like the example below.

// Associate a specific channel config with a particular RAIL instance, and
// load the settings that correspond to the first usable channel.
RAIL_ConfigChannels(railHandle, channelConfigs[0]);

For more information about the types of parameters that can be changed in the other functions and how to use them, see their individual documentation.

Macro Definition Documentation

#define RAIL_SETFIXEDLENGTH_INVALID   (0xFFFFU)

An invalid return value when calling RAIL_SetFixedLength().

An invalid return value when calling RAIL_SetFixedLength() while the radio is not in fixed-length mode.

Definition at line 1047 of file rail_types.h.

Typedef Documentation

RAIL_RadioConfigChangedCallback_t

A pointer to a function called whenever a radio configuration change occurs.

Parameters
[in]railHandleA handle for RAIL instance.
[in]entryThe radio configuration entry being changed to.

Definition at line 1314 of file rail_types.h.

Function Documentation

uint16_t RAIL_ConfigChannels ( RAIL_Handle_t  railHandle,
const RAIL_ChannelConfig_t config,
RAIL_RadioConfigChangedCallback_t  cb 
)

Configures the channels supported by this device.

Parameters
[in]railHandleA RAIL instance handle.
[in]configA pointer to the channel configuration for your device. This pointer will be cached in the library so it must exist for the runtime of the application. Typically, this should be what is stored in Flash by the configuration tool.
[in]cbFunction called whenever a radio configuration change occurs.
Returns
Returns the first available channel in the configuration.

When configuring channels on EFR32, the radio tuner is reconfigured based on the frequency and channel spacing in the channel configuration.

RAIL_Status_t RAIL_ConfigRadio ( RAIL_Handle_t  railHandle,
RAIL_RadioConfig_t  config 
)

Loads a static radio configuration.

Parameters
[in]railHandleA RAIL instance handle.
[in]configA pointer to a radio configuration.
Returns
Status code indicating success of the function call.

The configuration passed into this function should be auto-generated and not manually created or edited. By default this function should not be called in RAIL 2.x and later unless a non-default radio configuration needs to be applied. In RAIL 2.x and later, the RAIL_ConfigChannels function applies the default radio configuration automatically.

uint32_t RAIL_GetBitRate ( RAIL_Handle_t  railHandle)

Returns the bit rate for the current PHY.

Parameters
[in]railHandleA RAIL instance handle.
Returns
The bit rate in bits per second or 0.

The bit rate is the effective over-the-air data rate. It does not account for extra spreading for forward error correction, and so on, but accounts for modulation schemes, DSSS, and other configurations. For more information, see the modem calculator documentation. If the rate cannot be calculated, this function returns 0.

RAIL_Status_t RAIL_GetChannel ( RAIL_Handle_t  railHandle,
uint16_t *  channel 
)

Returns the current RAIL channel.

Parameters
[in]railHandleA RAIL instance handle.
[out]channelThe channel for which RAIL is currently configured.
Returns
RAIL_STATUS_NO_ERROR on success or RAIL_STATUS_INVALID_CALL if the radio is not configured for any channel or RAIL_STATUS_INVALID_PARAMETER if channel parameter is NULL.

This function returns the channel configured for use corresponding to the specified RAIL handle whether or not the specified handle is the active one.

uint32_t RAIL_GetSymbolRate ( RAIL_Handle_t  railHandle)

Returns the symbol rate for the current PHY.

Parameters
[in]railHandleA RAIL instance handle.
Returns
The symbol rate in symbols per second or 0.

The symbol rate is the rate of symbol changes over the air. For non-DSSS PHYs, this is the same as the baudrate. For DSSS PHYs, it is the baudrate divided by the length of a chipping sequence. For more information, see the modem calculator documentation. If the rate cannot be calculated, this function returns 0.

RAIL_Status_t RAIL_IsValidChannel ( RAIL_Handle_t  railHandle,
uint16_t  channel 
)

Checks to see if the channel exists in RAIL.

Parameters
[in]railHandleA RAIL instance handle.
[in]channelA channel number to check.
Returns
Returns RAIL_STATUS_NO_ERROR if channel exists

Returns RAIL_STATUS_INVALID_PARAMETER if the given channel does not exist in the channel configuration currently used or RAIL_STATUS_NO_ERROR if the channel is valid.

RAIL_Status_t RAIL_PrepareChannel ( RAIL_Handle_t  railHandle,
uint16_t  channel 
)

Causes radio settings associated with a particular channel to be applied to hardware.

Parameters
[in]railHandleA RAIL instance handle.
[in]channelThe channel to prepare for use.
Returns
RAIL_STATUS_NO_ERROR on success or RAIL_STATUS_INVALID_PARAMETER if the given channel does not have an associated channel configuration entry or RAIL_STATUS_INVALID_STATE if the specified railHandle is not the current RAIL handle in use. RAIL_STATUS_INVALID_STATE is only used in the multiprotocol version of RAIL.

This function walks the channelConfigEntry list and applies the configuration associated with the specified channel. This function is used to manually change channels without actually starting a TX or RX operation.

A successful return of this function will result in the radio being left in the idle state. An unsuccessful return of this function will not alter the radio state.

uint16_t RAIL_SetFixedLength ( RAIL_Handle_t  railHandle,
uint16_t  length 
)

Modifies the currently configured fixed frame length in bytes.

Parameters
[in]railHandleA RAIL instance handle.
[in]lengthThe expected fixed frame length. A value of 0 is infinite. A value of RAIL_SETFIXEDLENGTH_INVALID restores the frame's length back to the length specified by the default frame type configuration.
Returns
Length configured; The new frame length configured into the hardware for use. 0 if in infinite mode, or RAIL_SETFIXEDLENGTH_INVALID if the frame length has not yet been overridden by a valid value.

Sets the fixed-length configuration for transmit and receive. Be careful when using this function in receive and transmit as this function changes the default frame configuration and remains in force until it is called again with an input value of RAIL_SETFIXEDLENGTH_INVALID. This function will override any fixed or variable length settings from a radio configuration.

RAIL_Status_t RAIL_SetPaCTune ( RAIL_Handle_t  railHandle,
uint8_t  txPaCtuneValue,
uint8_t  rxPaCtuneValue 
)

Sets the PA capacitor tune value for transmit and receive.

Parameters
[in]railHandleA RAIL instance handle.
[in]txPaCtuneValuePA Ctune value for TX mode.
[in]rxPaCtuneValuePA Ctune value for RX mode.
Returns
Status code indicating success of the function call.

Tunes the impedance of the transmit and receive modes by changing the amount of capacitance at the PA output.