ST STM32WL55JC Reference Manual page 187

RM0453
(G)FSK Set_ModulationParams() command
Set_ModulationParams(Br, PulseShape, Bw, Fdev) is used to configure the
(G)FSK modulation parameters for the sub-GHz radio. Depending on the selected packet
type in Set_PacketType() sent prior to this function, the parameters for generic packets
are interpreted as follows:
•
Br and Fdev are used for the transmission and reception.
•
Bw is used only for reception.
•
PulseShape represents the Gaussian filter that can be used to filter the modulation
stream at the transmitter.
0
Opcode
w
byte 0
bytes 3:1
byte 4
1 2
Br[23:0]
w w
bits 7:0 Opcode: 0x8B
bits 23:0 Br[23:0]: Bit rate
0x000000: reserved
0x000001 - 0xFFFFFF: Br = 32 x 32 MHz / bit rate
bit 7:0 PulseShape[7:0]: Pulse shape
0x00: no filter applied
0x08:Gaussian BT 0.3
0x09: Gaussian BT 0.5
0x0A: Gaussian BT 0.7
0x0B: Gaussian BT 1.0
Others: no filter applied
RM0453 Rev 2
3 4 5
Bw[7:0]
w w w
Sub-GHz radio (SUBGHZ)
6 7
Fdev[23:0]
w w
187/1454
8
w
217