Thermal Protection#

RAIL_ConfigThermalProtection#

RAIL_Status_t RAIL_ConfigThermalProtection (RAIL_Handle_t genericRailHandle, const RAIL_ChipTempConfig_t * chipTempConfig)

Enable or disable the thermal protection if RAIL_SUPPORTS_THERMAL_PROTECTION is defined and update the temperature threshold and cool down hysteresis preventing or allowing transmissions.

Returns

• Status code indicating the result of the function call. Returns RAIL_STATUS_INVALID_PARAMETER if enable field from RAIL_ChipTempConfig_t is set to false when an EFF is present on the board.

When the temperature threshold minus a precise number of degrees specified by the cool down hysteresis parameter is exceeded, any future transmits are blocked until the temperature decreases below that limit. Besides, if the temperature threshold is exceeded, any active transmit is aborted.

By default the threshold is set to RAIL_CHIP_TEMP_THRESHOLD_MAX and the cool down hysteresis is set to RAIL_CHIP_TEMP_COOLDOWN_DEFAULT.

Note

• The thermal protection is automatically enabled when an EFF is present on the board. There is no use in calling this API in this case.

RAIL_GetThermalProtection#

RAIL_Status_t RAIL_GetThermalProtection (RAIL_Handle_t genericRailHandle, RAIL_ChipTempConfig_t * chipTempConfig)

Get the current thermal configuration parameter and status.

Returns

• Status code indicating the result of the function call.

RAIL_GetTemperature#

RAIL_Status_t RAIL_GetTemperature (RAIL_Handle_t railHandle, int16_t tempBuffer, bool reset)

Get the different temperature measurements in Kelvin done by sequencer or host.

Returns

• Status code indicating success of the function call.

Temperatures, in Kelvin, are stored in tempBuffer such as:

• tempBuffer[0] is the chip temperature

• tempBuffer[1] is the minimal chip temperature

• tempBuffer[2] is the maximal chip temperature

Values that are not populated yet or incorrect are set to 0.

If RAIL_SUPPORTS_HFXO_COMPENSATION tempBuffer[3] is the HFXO temperature

RAIL_HFXO_TEMP_MEASURE_COUNT#

#define RAIL_HFXO_TEMP_MEASURE_COUNT

(1U)

Number of temperature values provided for HFXO metrics.

RAIL_TEMP_MEASURE_COUNT#

#define RAIL_TEMP_MEASURE_COUNT

Total number of temperature values provided by RAIL_GetTemperature().

RAIL_CHIP_TEMP_THRESHOLD_MAX#

#define RAIL_CHIP_TEMP_THRESHOLD_MAX

(398U)

Maximum junction temperature in Kelvin.

A margin is subtracted before using it when RAIL_SUPPORTS_THERMAL_PROTECTION is enabled.

RAIL_CHIP_TEMP_COOLDOWN_DEFAULT#

#define RAIL_CHIP_TEMP_COOLDOWN_DEFAULT

(7U)

Default number of Kelvin degrees below threshold needed to allow transmissions.

RAIL_CHIP_TEMP_MEASURE_COUNT#

#define RAIL_CHIP_TEMP_MEASURE_COUNT

(3U)

Number of temperature values provided for the chip thermal protection.