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Tuning Capability for 76-108MHz FM Frequencies #6

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Tuning Capability for 76-108MHz FM Frequencies #6

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17 changes: 12 additions & 5 deletions examples/rda5807m_simpletest.py
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Original file line number Diff line number Diff line change
@@ -1,26 +1,31 @@
# SPDX-FileCopyrightText: Copyright (c) 2022 tinkeringtech for TinkeringTech LLC
# SPDX-FileCopyrightText: 2024 Norihiko Nakabayashi, modified for Japanese and World users
#
# SPDX-License-Identifier: Unlicense

# pylint: disable=global-statement, too-many-branches, too-many-statements
import time
import board
import busio
import supervisor
from adafruit_bus_device.i2c_device import I2CDevice
import tinkeringtech_rda5807m

# Preset stations. 8930 means 89.3 MHz, etc.
presets = [8930, 9510, 9710, 9950, 10100, 10110, 10650]
# presets = [8930, 9510, 9710, 9950, 10100, 10110, 10650]
# Preset stations for Tokyo, Japan.
presets = [7800, 7950, 8000, 8130, 8250, 8470, 8970, 9050, 9160, 9240, 9300]
i_sidx = 3 # Starting at station with index 3

# Initialize i2c bus
# If your board does not have STEMMA_I2C(), change as appropriate.
i2c = board.STEMMA_I2C()
# i2c = board.STEMMA_I2C()
i2c = busio.I2C(board.GP1, board.GP0)

# Receiver i2c communication
address = 0x11
vol = 3 # Default volume
band = "FM"
band = "FMWORLD" # "FM" or "FMWORLD

rds = tinkeringtech_rda5807m.RDSParser()

Expand All @@ -31,6 +36,7 @@

rdstext = "No rds data"


# RDS text handle
def textHandle(rdsText):
global rdstext
Expand All @@ -42,8 +48,9 @@ def textHandle(rdsText):

# Initialize the radio classes for use.
radio_i2c = I2CDevice(i2c, address)
radio = tinkeringtech_rda5807m.Radio(radio_i2c, rds, presets[i_sidx], vol)
radio.set_band(band) # Minimum frequency - 87 Mhz, max - 108 Mhz
radio = tinkeringtech_rda5807m.Radio(radio_i2c, rds, band, presets[i_sidx], vol)
# radio.set_band(band) # Minimum frequency - 87 Mhz, max - 108 Mhz


# Read input from serial
def serial_read():
Expand Down
42 changes: 28 additions & 14 deletions tinkeringtech_rda5807m.py
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Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
# SPDX-FileCopyrightText: Copyright (c) 2022 tinkeringtech for TinkeringTech LLC
# SPDX-FileCopyrightText: 2024 Norihiko Nakabayashi, modified for Japanese and World users
#
# SPDX-License-Identifier: MIT
"""
Expand Down Expand Up @@ -100,14 +101,8 @@ class Radio:
address = 0x11
maxvolume = 15

# FMWORLD Band
freq_low = 8700
freq_high = 10800
freq_steps = 10
rssi = 0

# Set default frequency and volume
def __init__(self, board, rds_parser, frequency=10000, volume=1):
def __init__(self, board, rds_parser, band="FM", frequency=10000, volume=1):
self.board = board
self.frequency = frequency

Expand All @@ -130,10 +125,18 @@ def __init__(self, board, rds_parser, frequency=10000, volume=1):
self.interval = 10 # Used for timing rssi checks - in seconds
self.initial = time.monotonic() # Time since boot

# Band - Default FMWORLD
# Band - Default FM
# 1. FM
# 2. FMWORLD
self.band = "FM"
self.band = band
# FMWORLD Band
if band == "FM":
self.freq_low = 8700
else:
self.freq_low = 7600
self.freq_high = 10800
self.freq_steps = 10
self.rssi = 0

# Functions saves register values to virtual registers, sets the basic frequency and volume
self.setup()
Expand Down Expand Up @@ -186,7 +189,15 @@ def set_freq(self, freq):
self.frequency = freq
new_channel = (freq - self.freq_low) // 10

reg_channel = RADIO_REG_CHAN_TUNE # Enable tuning
# Changes bands to FM or FMWORLD
band = self.band
if band == "FM":
r = RADIO_REG_CHAN_BAND_FM
else:
r = RADIO_REG_CHAN_BAND_FMWORLD
reg_channel = (
r | RADIO_REG_CHAN_SPACE_100 | RADIO_REG_CHAN_TUNE
) # Enable tuning
reg_channel = reg_channel | (new_channel << 6)

# Enable output, unmute
Expand All @@ -200,6 +211,7 @@ def set_freq(self, freq):

# Save frequency to register
self.registers[RADIO_REG_CHAN] = reg_channel

self.save_register(RADIO_REG_CHAN)
time.sleep(0.2)

Expand Down Expand Up @@ -230,14 +242,16 @@ def format_freq(self):
"""docstring."""
# Formats the current frequency for better readabilitiy
freq = self.frequency

"""
sfreq = str(freq)
sfreq = list(sfreq)
last_two = sfreq[-2:]
sfreq[-2] = "."
sfreq[-1] = last_two[0]
sfreq.append(last_two[1])
return ("".join(sfreq)) + " Mhz"
return ("".join(sfreq)) + " MHz"
"""
return "{:.1f} MHz".format(freq / 100)

def set_band(self, band):
"""docstring."""
Expand Down Expand Up @@ -434,7 +448,7 @@ def get_rssi(self):
# Get the current signal strength
self.write_bytes(bytes([RADIO_REG_RB]))
self.registers[RADIO_REG_RB] = self.read16()
self.rssi = self.registers[RADIO_REG_RB] >> 10
self.rssi = self.registers[RADIO_REG_RB] >> 9 # 10 -> 9
return self.rssi

def get_radio_info(self):
Expand All @@ -443,7 +457,7 @@ def get_radio_info(self):
self.read_registers()
if self.registers[RADIO_REG_RA] & RADIO_REG_RA_RDS:
self.rds = True
self.rssi = self.registers[RADIO_REG_RB] >> 10
self.rssi = self.registers[RADIO_REG_RB] >> 9 # 10 -> 9
if self.registers[RADIO_REG_RB] & RADIO_REG_RB_FMTRUE:
self.tuned = True
if self.registers[RADIO_REG_CTRL] & RADIO_REG_CTRL_MONO:
Expand Down