Custom version of https://github.com/tomelec/RPi-LoRa-KISS-TNC
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135 lines
4.8 KiB
135 lines
4.8 KiB
""" Defines the BOARD class that contains the board pin mappings and RF module HF/LF info. """
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# -*- coding: utf-8 -*-
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# Copyright 2015-2018 Mayer Analytics Ltd.
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#
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# This file is part of pySX127x.
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#
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# pySX127x is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public
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# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
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# version.
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#
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# pySX127x is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You can be released from the requirements of the license by obtaining a commercial license. Such a license is
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# mandatory as soon as you develop commercial activities involving pySX127x without disclosing the source code of your
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# own applications, or shipping pySX127x with a closed source product.
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#
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# You should have received a copy of the GNU General Public License along with pySX127. If not, see
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# <http://www.gnu.org/licenses/>.
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import RPi.GPIO as GPIO
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import spidev
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import time
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class BOARD:
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""" Board initialisation/teardown and pin configuration is kept here.
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Also, information about the RF module is kept here.
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This is the Raspberry Pi board with one LED and a modtronix inAir9B.
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"""
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# Note that the BCOM numbering for the GPIOs is used.
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DIO0 = 5 # RaspPi GPIO 5
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DIO1 = 23 # RaspPi GPIO 23
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DIO2 = 24 # RaspPi GPIO 24
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DIO3 = 25 # RaspPi GPIO 25
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LED = 13 # RaspPi GPIO 18 connects to the LED on the proto shield
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# Made it GPIO 13, as pin 18 is in use by Direwolf (M. Konstapel 2022-01-27)
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SWITCH = 4 # RaspPi GPIO 4 connects to a switch
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# The spi object is kept here
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spi = None
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# tell pySX127x here whether the attached RF module uses low-band (RF*_LF pins) or high-band (RF*_HF pins).
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# low band (called band 1&2) are 137-175 and 410-525
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# high band (called band 3) is 862-1020
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low_band = True
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@staticmethod
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def setup():
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""" Configure the Raspberry GPIOs
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:rtype : None
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"""
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GPIO.setmode(GPIO.BCM)
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# LED
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GPIO.setup(BOARD.LED, GPIO.OUT)
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GPIO.output(BOARD.LED, 0)
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# switch
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GPIO.setup(BOARD.SWITCH, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
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# DIOx
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for gpio_pin in [BOARD.DIO0, BOARD.DIO1, BOARD.DIO2, BOARD.DIO3]:
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GPIO.setup(gpio_pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
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# blink 2 times to signal the board is set up
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BOARD.blink(.1, 2)
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@staticmethod
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def teardown():
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""" Cleanup GPIO and SpiDev """
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GPIO.cleanup()
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BOARD.spi.close()
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@staticmethod
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def SpiDev(spi_bus=0, spi_cs=0):
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""" Init and return the SpiDev object
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:return: SpiDev object
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:param spi_bus: The RPi SPI bus to use: 0 or 1
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:param spi_cs: The RPi SPI chip select to use: 0 or 1
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:rtype: SpiDev
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"""
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BOARD.spi = spidev.SpiDev()
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BOARD.spi.open(spi_bus, spi_cs)
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BOARD.spi.max_speed_hz = 5000000 # SX127x can go up to 10MHz, pick half that to be safe
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return BOARD.spi
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@staticmethod
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def add_event_detect(dio_number, callback):
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""" Wraps around the GPIO.add_event_detect function
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:param dio_number: DIO pin 0...5
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:param callback: The function to call when the DIO triggers an IRQ.
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:return: None
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"""
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GPIO.add_event_detect(dio_number, GPIO.RISING, callback=callback)
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@staticmethod
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def add_events(cb_dio0, cb_dio1, cb_dio2, cb_dio3, cb_dio4, cb_dio5, switch_cb=None):
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BOARD.add_event_detect(BOARD.DIO0, callback=cb_dio0)
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BOARD.add_event_detect(BOARD.DIO1, callback=cb_dio1)
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BOARD.add_event_detect(BOARD.DIO2, callback=cb_dio2)
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BOARD.add_event_detect(BOARD.DIO3, callback=cb_dio3)
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# the modtronix inAir9B does not expose DIO4 and DIO5
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if switch_cb is not None:
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GPIO.add_event_detect(BOARD.SWITCH, GPIO.RISING, callback=switch_cb, bouncetime=300)
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@staticmethod
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def led_on(value=1):
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""" Switch the proto shields LED
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:param value: 0/1 for off/on. Default is 1.
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:return: value
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:rtype : int
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"""
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GPIO.output(BOARD.LED, value)
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return value
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@staticmethod
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def led_off():
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""" Switch LED off
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:return: 0
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"""
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GPIO.output(BOARD.LED, 0)
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return 0
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@staticmethod
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def blink(time_sec, n_blink):
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if n_blink == 0:
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return
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BOARD.led_on()
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for i in range(n_blink):
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time.sleep(time_sec)
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BOARD.led_off()
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time.sleep(time_sec)
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BOARD.led_on()
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BOARD.led_off()
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