Operating Mode Commands - ST STM32WL55JC Reference Manual

RM0453
Set_Rx() command
Set_Rx(Timeout) is used to set the sub-GHz radio in Receive mode.
Opcode
byte 0
bytes 3:1
Time-out duration is computed by the following formula:
Time-out duration = Timeout x 15.625 μs (maximum Time-out duration = 262.14 s)
When Set_Rx(Timeout) is sent in Standby mode or Transmit mode, the sub-GHz radio
passes through the FS mode (no need to send Set_Fs()). In this case, the RF-PLL
frequency must be set by Set_RfFrequency() prior sending Set_Rx(Timeout).
Set_StopRxTimerOnPreamble() command
Set_StopRxTimerOnPreamble(RxTimeoutStop) allows the selection of the receiver
event on which the receiver timeout timer (in Set_Rx()), is stopped.
byte 0
byte 1
Caution: When the receiver timeout is selected to be stopped on preamble detection, the sub-GHz
radio remains in Receive mode until a packet is received. A false preamble detection may
cause the sub-GHz radio to remain in Receive mode for an unexpected long period, until
stopped by a mode configuration command.
Set_RxDutyCycle() command
Set_RxDutyCycle(RxPeriod, SleepPeriod) is used to set the sub-GHz radio
receiver in listening mode, regularly looking for new packets. This command must be sent in
Standby mode. This command is only functional with FSK and LoRa packet type.
0
w
bits 7:0 Opcode: 0x82
bits 23:0 Timeout[23:0]: Transmit packet timeout
0x000000: timeout disabled
0x000001 - 0xFFFFFE: timeout enabled, single packet receive mode,
resolution 15.625 μs
0xFFFFFF: timeout disabled, continuous receive mode
0
Opcode
w
bits 7:0 Opcode: 0x9F
bits 7:1 Reserved, must be kept at reset value.
bit 0 RxTimeoutStop: receiver timeout timer stop event selection
0: receive timeout stopped on synchronization word detection in generic
packet mode or header detection in LoRa packet mode
1: receive timeout stopped on preamble detection
1
Timeout[23:0]
w
RM0453 Rev 2
Sub-GHz radio (SUBGHZ)
2
w
1
RxTimeoutStop
w
3
w
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