Radio modes

gs_setup.py

@@ -5,10 +5,8 @@
 import board
 import busio
 import digitalio
-from lib import pycubed_rfm9x_fsk
 from lib import radiohead
 from lib.configuration import radio_configuration as rf_config
-from shell_utils import bold, normal
 
 
 def initialize_radio(tx_spi, tx_cs, tx_reset, rx_spi=None, rx_cs=None, rx_reset=None, rxtx_switch=None):

lib/configuration/radio_configuration.py

@@ -2,6 +2,7 @@
 Defines the default settings used to configure the RFM9x satellite
 """
 
+# either "lora" or "fsk"
 PROTOCOL = "lora"
 
 # FSK specific
@@ -14,6 +15,7 @@
 SIGNAL_BANDWIDTH = 125000
 CODING_RATE = 5
 
+# shared between lora/fsk
 CHECKSUM = True
 TX_POWER = 23  # dB
 FREQUENCY = 433.0  # MHz

lib/pycubed_rfm9x_fsk.py

@@ -15,11 +15,9 @@
 ====================================================
 Modified to use FSK in 2022 by Jacob Willis
 """
-import random
 import time
 import adafruit_bus_device.spi_device as spidev
 from micropython import const
-import tasko
 
 HAS_SUPERVISOR = False
 
@@ -663,3 +661,16 @@ def crc_ok(self):
     def fifo_empty(self):
         """True when FIFO is empty"""
         return (self._read_u8(Constants._RH_RF95_REG_3F_IRQ_FLAGS_2) & (0b1 << 6)) >> 6
+
+    def write_payload(self, payload):
+        self._write_from(Constants._RH_RF95_REG_00_FIFO, payload)
+
+    def check_data(self, data):
+        assert 0 < len(data) <= 57
+
+    def get_packet(self):
+        packet = bytearray(Constants._MAX_FIFO_LENGTH)
+        packet_length = self._read_until_flag(Constants._RH_RF95_REG_00_FIFO,
+                                              packet,
+                                              self.fifo_empty)
+        return packet[:packet_length]

lib/pycubed_rfm9x.py → lib/pycubed_rfm9x_lora.py

@@ -12,11 +12,9 @@
 
 * Author(s): Tony DiCola, Jerry Needell
 """
-import random
 import time
 import adafruit_bus_device.spi_device as spidev
 from micropython import const
-import tasko
 
 HAS_SUPERVISOR = False
 
@@ -130,6 +128,8 @@ class Constants:
     _TICKS_MAX = const(_TICKS_PERIOD - 1)
     _TICKS_HALFPERIOD = const(_TICKS_PERIOD // 2)
 
+    _MAX_FIFO_LENGTH = 258
+
 # Disable the too many instance members warning.  Pylint has no knowledge
 # of the context and is merely guessing at the proper amount of members.  This
 # is a complex chip which requires exposing many attributes and state.  Disable
@@ -687,3 +687,28 @@ def rx_done(self) -> bool:
     def crc_error(self) -> bool:
         """crc status"""
         return (self._read_u8(Constants._RH_RF95_REG_12_IRQ_FLAGS) & 0x20) >> 5
+
+    def write_payload(self, payload) -> bool:
+        # Write payload.
+        self._write_from(Constants._RH_RF95_REG_00_FIFO, payload)
+        # Write payload and header length.
+        self._write_u8(Constants._RH_RF95_REG_22_PAYLOAD_LENGTH, len(payload))
+
+    def check_data(self, data):
+        assert 0 < len(data) <= 241
+
+    def get_packet(self):
+        # get length of data in FIFO
+        fifo_length = self._read_u8(Constants._RH_RF95_REG_13_RX_NB_BYTES)
+        # get start address of last packet in FIFO
+        current_addr = self._read_u8(Constants._RH_RF95_REG_10_FIFO_RX_CURRENT_ADDR)
+        # write to the pointer where we need to get data
+        self._write_u8(Constants._RH_RF95_REG_0D_FIFO_ADDR_PTR, current_addr)
+        # create a packet of fifo_length size
+        packet = bytearray(fifo_length)
+        # Read the packet.
+        self._read_into(Constants._RH_RF95_REG_00_FIFO, packet)
+        # Clear interrupt.
+        self._write_u8(Constants._RH_RF95_REG_12_IRQ_FLAGS, 0xFF)
+
+        return packet