Swarm Technologies TILE01 SX1278 init sequence

gistfile1.txt

SPI commands sent to a Semtech SX1278 radio SoC during initialization, as captured from a Swarm Technologies TILE01.

c0 ff c1 f0         RegDioMapping1+2: no function on DIO pins
81 80               Lora Mode, device mode -> sleep
01 00 42 00 09 00 06 00 07 00 08 00 read some reg values
89 00               set PA at min power
86 22 87 75 88 d7   set frequency 137.84MHz
3b 00 bb 5d 3b 00   RegInvertIQ2: ???
89 4f               set PA mid-level
86 6c 87 80 88 00   set frequency to default (433MHz)
c0 ff c1 f0         no change to DIO
81 01               device mode -> standby
1d 00 9d 52         RegModemConfig1: bw 41.7kHz, coding rate 4/5
1d 00 9d 52         do it twice
26 00 a6 0c         enable LowDataRateOptimize, LNA AGC
86 22 87 77 88 2d   set frequency 137.86MHz
31 00 b1 43         set AutomaticIFOn to 0 
b0 00 af 44         set IfFreq1 and IfFreq2 according to errata
81 05               device mode -> receive
c0 3f c1 f0         set DIO0=RxDone
89 7e               RegPaConfig: RFO, PA at almost max power
a0 00 a1 0f         PreambleLength=15 (instead of default 8)
8a 00               PARamp 3.4ms
9e 84               RegModemConfig2: SpreadingFactor=256 chips/symbol, CRC enabled
8f 00 8e 00         set RX/TX FIFO base addresses to 0
4b 00 cb 19         clock is TCXO
26 00 a6 08         RegModemConfig3: LowDataRateOptimize enabled
0b 00 8b 2b         RegOcp: OCP enabled (default)
0c 00 8c 40         RefLna: G2 (one notch below max)
c0 ff c1 f0         no DIO function
81 80               Lora Mode, device mode -> sleep
c0 ff c1 f0         no DIO function
81 05               device mode -> receive
c0 3f c1 f0         DIO0=RxDone 
1b 00 1b 00 ..      polling RSSI (repeating every 250ms)