kopia lustrzana https://github.com/SQ9MDD/TTGO-T-Beam-LoRa-APRS
746 wiersze
36 KiB
C++
746 wiersze
36 KiB
C++
// BG_RF95.h
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//
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// Definitions for HopeRF LoRa radios per:
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// http://www.hoperf.com/upload/rf/RFM95_96_97_98W.pdf
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// http://www.hoperf.cn/upload/rfchip/RF96_97_98.pdf
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//
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// Author: Mike McCauley (mikem@airspayce.com)
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// Copyright (C) 2014 Mike McCauley
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// $Id: BG_RF95.h,v 1.11 2016/07/07 00:02:53 mikem Exp mikem $
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// modified for Lora APRS Bernd Gasser OE1ACM
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#ifndef BG_RF95_h
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#define BG_RF95_h
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#include <RHSPIDriver.h>
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// This is the maximum number of interrupts the driver can support
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// Most Arduinos can handle 2, Megas can handle more
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#define BG_RF95_NUM_INTERRUPTS 3
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// Max number of octets the LORA Rx/Tx FIFO can hold
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#define BG_RF95_FIFO_SIZE 255
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// This is the maximum number of bytes that can be carried by the LORA.
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// We use some for headers, keeping fewer for RadioHead messages
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#define BG_RF95_MAX_PAYLOAD_LEN BG_RF95_FIFO_SIZE
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// The length of the headers we add.
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// The headers are inside the LORA's payload
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#define BG_RF95_HEADER_LEN 4
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// This is the maximum message length that can be supported by this driver.
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// Can be pre-defined to a smaller size (to save SRAM) prior to including this header
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// Here we allow for 1 byte message length, 4 bytes headers, user data and 2 bytes of FCS
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#ifndef BG_RF95_MAX_MESSAGE_LEN
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#define BG_RF95_MAX_MESSAGE_LEN (BG_RF95_MAX_PAYLOAD_LEN - BG_RF95_HEADER_LEN)
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#endif
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// The crystal oscillator frequency of the module
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#define BG_RF95_FXOSC 32000000.0
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// The Frequency Synthesizer step = BG_RF95_FXOSC / 2^^19
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#define BG_RF95_FSTEP (BG_RF95_FXOSC / 524288)
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// Register names (LoRa Mode, from table 85)
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#define BG_RF95_REG_00_FIFO 0x00
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#define BG_RF95_REG_01_OP_MODE 0x01
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#define BG_RF95_REG_02_RESERVED 0x02
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#define BG_RF95_REG_03_RESERVED 0x03
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#define BG_RF95_REG_04_RESERVED 0x04
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#define BG_RF95_REG_05_RESERVED 0x05
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#define BG_RF95_REG_06_FRF_MSB 0x06
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#define BG_RF95_REG_07_FRF_MID 0x07
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#define BG_RF95_REG_08_FRF_LSB 0x08
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#define BG_RF95_REG_09_PA_CONFIG 0x09
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#define BG_RF95_REG_0A_PA_RAMP 0x0a
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#define BG_RF95_REG_0B_OCP 0x0b
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#define BG_RF95_REG_0C_LNA 0x0c
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#define BG_RF95_REG_0D_FIFO_ADDR_PTR 0x0d
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#define BG_RF95_REG_0E_FIFO_TX_BASE_ADDR 0x0e
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#define BG_RF95_REG_0F_FIFO_RX_BASE_ADDR 0x0f
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#define BG_RF95_REG_10_FIFO_RX_CURRENT_ADDR 0x10
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#define BG_RF95_REG_11_IRQ_FLAGS_MASK 0x11
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#define BG_RF95_REG_12_IRQ_FLAGS 0x12
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#define BG_RF95_REG_13_RX_NB_BYTES 0x13
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#define BG_RF95_REG_14_RX_HEADER_CNT_VALUE_MSB 0x14
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#define BG_RF95_REG_15_RX_HEADER_CNT_VALUE_LSB 0x15
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#define BG_RF95_REG_16_RX_PACKET_CNT_VALUE_MSB 0x16
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#define BG_RF95_REG_17_RX_PACKET_CNT_VALUE_LSB 0x17
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#define BG_RF95_REG_18_MODEM_STAT 0x18
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#define BG_RF95_REG_19_PKT_SNR_VALUE 0x19
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#define BG_RF95_REG_1A_PKT_RSSI_VALUE 0x1a
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#define BG_RF95_REG_1B_RSSI_VALUE 0x1b
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#define BG_RF95_REG_1C_HOP_CHANNEL 0x1c
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#define BG_RF95_REG_1D_MODEM_CONFIG1 0x1d
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#define BG_RF95_REG_1E_MODEM_CONFIG2 0x1e
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#define BG_RF95_REG_1F_SYMB_TIMEOUT_LSB 0x1f
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#define BG_RF95_REG_20_PREAMBLE_MSB 0x20
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#define BG_RF95_REG_21_PREAMBLE_LSB 0x21
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#define BG_RF95_REG_22_PAYLOAD_LENGTH 0x22
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#define BG_RF95_REG_23_MAX_PAYLOAD_LENGTH 0x23
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#define BG_RF95_REG_24_HOP_PERIOD 0x24
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#define BG_RF95_REG_25_FIFO_RX_BYTE_ADDR 0x25
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#define BG_RF95_REG_26_MODEM_CONFIG3 0x26
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#define BG_RF95_REG_40_DIO_MAPPING1 0x40
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#define BG_RF95_REG_41_DIO_MAPPING2 0x41
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#define BG_RF95_REG_42_VERSION 0x42
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#define BG_RF95_REG_4B_TCXO 0x4b
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#define BG_RF95_REG_4D_PA_DAC 0x4d
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#define BG_RF95_REG_5B_FORMER_TEMP 0x5b
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#define BG_RF95_REG_61_AGC_REF 0x61
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#define BG_RF95_REG_62_AGC_THRESH1 0x62
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#define BG_RF95_REG_63_AGC_THRESH2 0x63
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#define BG_RF95_REG_64_AGC_THRESH3 0x64
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// BG_RF95_REG_01_OP_MODE 0x01
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#define BG_RF95_LONG_RANGE_MODE 0x80
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#define BG_RF95_ACCESS_SHARED_REG 0x40
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#define BG_RF95_MODE 0x07
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#define BG_RF95_MODE_SLEEP 0x00
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#define BG_RF95_MODE_STDBY 0x01
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#define BG_RF95_MODE_FSTX 0x02
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#define BG_RF95_MODE_TX 0x03
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#define BG_RF95_MODE_FSRX 0x04
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#define BG_RF95_MODE_RXCONTINUOUS 0x05
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#define BG_RF95_MODE_RXSINGLE 0x06
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#define BG_RF95_MODE_CAD 0x07
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// BG_RF95_REG_09_PA_CONFIG 0x09
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#define BG_RF95_PA_SELECT 0x80
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#define BG_RF95_MAX_POWER 0x70
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#define BG_RF95_OUTPUT_POWER 0x0f
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// BG_RF95_REG_0A_PA_RAMP 0x0a
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#define BG_RF95_LOW_PN_TX_PLL_OFF 0x10
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#define BG_RF95_PA_RAMP 0x0f
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#define BG_RF95_PA_RAMP_3_4MS 0x00
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#define BG_RF95_PA_RAMP_2MS 0x01
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#define BG_RF95_PA_RAMP_1MS 0x02
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#define BG_RF95_PA_RAMP_500US 0x03
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#define BG_RF95_PA_RAMP_250US 0x0
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#define BG_RF95_PA_RAMP_125US 0x05
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#define BG_RF95_PA_RAMP_100US 0x06
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#define BG_RF95_PA_RAMP_62US 0x07
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#define BG_RF95_PA_RAMP_50US 0x08
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#define BG_RF95_PA_RAMP_40US 0x09
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#define BG_RF95_PA_RAMP_31US 0x0a
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#define BG_RF95_PA_RAMP_25US 0x0b
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#define BG_RF95_PA_RAMP_20US 0x0c
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#define BG_RF95_PA_RAMP_15US 0x0d
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#define BG_RF95_PA_RAMP_12US 0x0e
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#define BG_RF95_PA_RAMP_10US 0x0f
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// BG_RF95_REG_0B_OCP 0x0b
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#define BG_RF95_OCP_ON 0x20
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#define BG_RF95_OCP_TRIM 0x1f
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// BG_RF95_REG_0C_LNA 0x0c
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#define BG_RF95_LNA_GAIN 0xe0
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#define BG_RF95_LNA_BOOST 0x03
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#define BG_RF95_LNA_BOOST_DEFAULT 0x00
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#define BG_RF95_LNA_BOOST_150PC 0x11
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// BG_RF95_REG_11_IRQ_FLAGS_MASK 0x11
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#define BG_RF95_RX_TIMEOUT_MASK 0x80
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#define BG_RF95_RX_DONE_MASK 0x40
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#define BG_RF95_PAYLOAD_CRC_ERROR_MASK 0x20
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#define BG_RF95_VALID_HEADER_MASK 0x10
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#define BG_RF95_TX_DONE_MASK 0x08
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#define BG_RF95_CAD_DONE_MASK 0x04
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#define BG_RF95_FHSS_CHANGE_CHANNEL_MASK 0x02
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#define BG_RF95_CAD_DETECTED_MASK 0x01
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// BG_RF95_REG_12_IRQ_FLAGS 0x12
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#define BG_RF95_RX_TIMEOUT 0x80
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#define BG_RF95_RX_DONE 0x40
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#define BG_RF95_PAYLOAD_CRC_ERROR 0x20
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#define BG_RF95_VALID_HEADER 0x10
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#define BG_RF95_TX_DONE 0x08
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#define BG_RF95_CAD_DONE 0x04
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#define BG_RF95_FHSS_CHANGE_CHANNEL 0x02
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#define BG_RF95_CAD_DETECTED 0x01
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// BG_RF95_REG_18_MODEM_STAT 0x18
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#define BG_RF95_RX_CODING_RATE 0xe0
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#define BG_RF95_MODEM_STATUS_CLEAR 0x10
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#define BG_RF95_MODEM_STATUS_HEADER_INFO_VALID 0x08
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#define BG_RF95_MODEM_STATUS_RX_ONGOING 0x04
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#define BG_RF95_MODEM_STATUS_SIGNAL_SYNCHRONIZED 0x02
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#define BG_RF95_MODEM_STATUS_SIGNAL_DETECTED 0x01
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// BG_RF95_REG_1C_HOP_CHANNEL 0x1c
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#define BG_RF95_PLL_TIMEOUT 0x80
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#define BG_RF95_RX_PAYLOAD_CRC_IS_ON 0x40
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#define BG_RF95_FHSS_PRESENT_CHANNEL 0x3f
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// BG_RF95_REG_1D_MODEM_CONFIG1 0x1d
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#define BG_RF95_BW 0xc0
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#define BG_RF95_BW_125KHZ 0x00
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#define BG_RF95_BW_250KHZ 0x40
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#define BG_RF95_BW_500KHZ 0x80
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#define BG_RF95_BW_RESERVED 0xc0
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#define BG_RF95_CODING_RATE 0x38
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#define BG_RF95_CODING_RATE_4_5 0x00
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#define BG_RF95_CODING_RATE_4_6 0x08
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#define BG_RF95_CODING_RATE_4_7 0x10
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#define BG_RF95_CODING_RATE_4_8 0x18
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#define BG_RF95_IMPLICIT_HEADER_MODE_ON 0x04
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#define BG_RF95_RX_PAYLOAD_CRC_ON 0x02
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#define BG_RF95_LOW_DATA_RATE_OPTIMIZE 0x01
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// BG_RF95_REG_1E_MODEM_CONFIG2 0x1e
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#define BG_RF95_SPREADING_FACTOR 0xf0
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#define BG_RF95_SPREADING_FACTOR_64CPS 0x60
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#define BG_RF95_SPREADING_FACTOR_128CPS 0x70
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#define BG_RF95_SPREADING_FACTOR_256CPS 0x80
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#define BG_RF95_SPREADING_FACTOR_512CPS 0x90
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#define BG_RF95_SPREADING_FACTOR_1024CPS 0xa0
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#define BG_RF95_SPREADING_FACTOR_2048CPS 0xb0
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#define BG_RF95_SPREADING_FACTOR_4096CPS 0xc0
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#define BG_RF95_TX_CONTINUOUS_MOE 0x08
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#define BG_RF95_AGC_AUTO_ON 0x04
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#define BG_RF95_SYM_TIMEOUT_MSB 0x03
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// BG_RF95_REG_4D_PA_DAC 0x4d
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#define BG_RF95_PA_DAC_DISABLE 0x04
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#define BG_RF95_PA_DAC_ENABLE 0x07
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/////////////////////////////////////////////////////////////////////
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/// \class BG_RF95 BG_RF95.h <BG_RF95.h>
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/// \brief Driver to send and receive unaddressed, unreliable datagrams via a LoRa
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/// capable radio transceiver.
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///
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/// For Semtech SX1276/77/78/79 and HopeRF RF95/96/97/98 and other similar LoRa capable radios.
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/// Based on http://www.hoperf.com/upload/rf/RFM95_96_97_98W.pdf
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/// and http://www.hoperf.cn/upload/rfchip/RF96_97_98.pdf
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/// and http://www.semtech.com/images/datasheet/LoraDesignGuide_STD.pdf
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/// and http://www.semtech.com/images/datasheet/sx1276.pdf
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/// and http://www.semtech.com/images/datasheet/sx1276_77_78_79.pdf
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/// FSK/GFSK/OOK modes are not (yet) supported.
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///
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/// Works with
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/// - the excellent MiniWirelessLoRa from Anarduino http://www.anarduino.com/miniwireless
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/// - The excellent Modtronix inAir4 http://modtronix.com/inair4.html
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/// and inAir9 modules http://modtronix.com/inair9.html.
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/// - the excellent Rocket Scream Mini Ultra Pro with the RFM95W
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/// http://www.rocketscream.com/blog/product/mini-ultra-pro-with-radio/
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/// - Lora1276 module from NiceRF http://www.nicerf.com/product_view.aspx?id=99
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/// - Adafruit Feather M0 with RFM95
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///
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/// \par Overview
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///
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/// This class provides basic functions for sending and receiving unaddressed,
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/// unreliable datagrams of arbitrary length to 251 octets per packet.
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///
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/// Manager classes may use this class to implement reliable, addressed datagrams and streams,
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/// mesh routers, repeaters, translators etc.
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///
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/// Naturally, for any 2 radios to communicate that must be configured to use the same frequency and
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/// modulation scheme.
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///
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/// This Driver provides an object-oriented interface for sending and receiving data messages with Hope-RF
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/// RFM95/96/97/98(W), Semtech SX1276/77/78/79 and compatible radio modules in LoRa mode.
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///
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/// The Hope-RF (http://www.hoperf.com) RFM95/96/97/98(W) and Semtech SX1276/77/78/79 is a low-cost ISM transceiver
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/// chip. It supports FSK, GFSK, OOK over a wide range of frequencies and
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/// programmable data rates, and it also supports the proprietary LoRA (Long Range) mode, which
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/// is the only mode supported in this RadioHead driver.
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///
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/// This Driver provides functions for sending and receiving messages of up
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/// to 251 octets on any frequency supported by the radio, in a range of
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/// predefined Bandwidths, Spreading Factors and Coding Rates. Frequency can be set with
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/// 61Hz precision to any frequency from 240.0MHz to 960.0MHz. Caution: most modules only support a more limited
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/// range of frequencies due to antenna tuning.
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///
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/// Up to 2 modules can be connected to an Arduino (3 on a Mega),
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/// permitting the construction of translators and frequency changers, etc.
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///
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/// Support for other features such as transmitter power control etc is
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/// also provided.
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///
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/// Tested on MinWirelessLoRa with arduino-1.0.5
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/// on OpenSuSE 13.1.
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/// Also tested with Teensy3.1, Modtronix inAir4 and Arduino 1.6.5 on OpenSuSE 13.1
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///
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/// \par Packet Format
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///
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/// All messages sent and received by this BG_RF95 Driver conform to this packet format:
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///
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/// - LoRa mode:
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/// - 8 symbol PREAMBLE
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/// - Explicit header with header CRC (handled internally by the radio)
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/// - 4 octets HEADER: (TO, FROM, ID, FLAGS)
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/// - 0 to 251 octets DATA
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/// - CRC (handled internally by the radio)
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///
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/// \par Connecting RFM95/96/97/98 and Semtech SX1276/77/78/79 to Arduino
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///
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/// We tested with Anarduino MiniWirelessLoRA, which is an Arduino Duemilanove compatible with a RFM96W
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/// module on-board. Therefore it needs no connections other than the USB
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/// programming connection and an antenna to make it work.
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///
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/// If you have a bare RFM95/96/97/98 that you want to connect to an Arduino, you
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/// might use these connections (untested): CAUTION: you must use a 3.3V type
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/// Arduino, otherwise you will also need voltage level shifters between the
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/// Arduino and the RFM95. CAUTION, you must also ensure you connect an
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/// antenna.
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///
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/// \code
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/// Arduino RFM95/96/97/98
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/// GND----------GND (ground in)
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/// 3V3----------3.3V (3.3V in)
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///
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/// SS pin D10----------NSS (CS chip select in)
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/// SCK pin D13----------SCK (SPI clock in)
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/// MOSI pin D11----------MOSI (SPI Data in)
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/// MISO pin D12----------MISO (SPI Data out)
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/// \endcode
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/// With these connections, you can then use the default constructor BG_RF95().
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/// You can override the default settings for the SS pin and the interrupt in
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/// the BG_RF95 constructor if you wish to connect the slave select SS to other
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/// than the normal one for your Arduino (D10 for Diecimila, Uno etc and D53
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/// for Mega) or the interrupt request to other than pin D2 (Caution,
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/// different processors have different constraints as to the pins available
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/// for interrupts).
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///
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/// You can connect a Modtronix inAir4 or inAir9 directly to a 3.3V part such as a Teensy 3.1 like
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/// this (tested).
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/// \code
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/// Teensy inAir4 inAir9
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/// GND----------GND (ground in)
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/// 3V3----------3.3V (3.3V in)
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/// interrupt 0 pin D2-----------D00 (interrupt request out)
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/// SS pin D10----------CS (CS chip select in)
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/// SCK pin D13----------CK (SPI clock in)
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/// MOSI pin D11----------SI (SPI Data in)
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/// MISO pin D12----------SO (SPI Data out)
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/// \endcode
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/// With these connections, you can then use the default constructor BG_RF95().
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/// you must also set the transmitter power with useRFO:
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/// driver.setTxPower(13, true);
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///
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/// Note that if you are using Modtronix inAir4 or inAir9,or any other module which uses the
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/// transmitter RFO pins and not the PA_BOOST pins
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/// that you must configure the power transmitter power for -1 to 14 dBm and with useRFO true.
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/// Failure to do that will result in extremely low transmit powers.
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///
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/// If you have an Arduino M0 Pro from arduino.org,
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/// you should note that you cannot use Pin 2 for the interrupt line
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/// (Pin 2 is for the NMI only). The same comments apply to Pin 4 on Arduino Zero from arduino.cc.
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/// Instead you can use any other pin (we use Pin 3) and initialise RH_RF69 like this:
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/// \code
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/// // Slave Select is pin 10, interrupt is Pin 3
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/// BG_RF95 driver(10, 3);
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/// \endcode
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///
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/// If you have a Rocket Scream Mini Ultra Pro with the RFM95W:
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/// - Ensure you have Arduino SAMD board support 1.6.5 or later in Arduino IDE 1.6.8 or later.
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/// - The radio SS is hardwired to pin D5 and the DIO0 interrupt to pin D2,
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/// so you need to initialise the radio like this:
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/// \code
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/// BG_RF95 driver(5, 2);
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/// \endcode
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/// - The name of the serial port on that board is 'SerialUSB', not 'Serial', so this may be helpful at the top of our
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/// sample sketches:
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/// \code
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/// #define Serial SerialUSB
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/// \endcode
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/// - You also need this in setup before radio initialisation
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/// \code
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/// // Ensure serial flash is not interfering with radio communication on SPI bus
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/// pinMode(4, OUTPUT);
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/// digitalWrite(4, HIGH);
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/// \endcode
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/// - and if you have a 915MHz part, you need this after driver/manager intitalisation:
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/// \code
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/// rf95.setFrequency(915.0);
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/// \endcode
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/// which adds up to modifying sample sketches something like:
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/// \code
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/// #include <SPI.h>
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/// #include <BG_RF95.h>
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/// BG_RF95 rf95(5, 2); // Rocket Scream Mini Ultra Pro with the RFM95W
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/// #define Serial SerialUSB
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///
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/// void setup()
|
|
/// {
|
|
/// // Ensure serial flash is not interfering with radio communication on SPI bus
|
|
/// pinMode(4, OUTPUT);
|
|
/// digitalWrite(4, HIGH);
|
|
///
|
|
/// Serial.begin(9600);
|
|
/// while (!Serial) ; // Wait for serial port to be available
|
|
/// if (!rf95.init())
|
|
/// Serial.println("init failed");
|
|
/// rf95.setFrequency(915.0);
|
|
/// }
|
|
/// ...
|
|
/// \endcode
|
|
///
|
|
/// For Adafruit Feather M0 with RFM95, construct the driver like this:
|
|
/// \code
|
|
/// BG_RF95 rf95(8, 3);
|
|
/// \endcode
|
|
///
|
|
/// It is possible to have 2 or more radios connected to one Arduino, provided
|
|
/// each radio has its own SS and interrupt line (SCK, SDI and SDO are common
|
|
/// to all radios)
|
|
///
|
|
/// Caution: on some Arduinos such as the Mega 2560, if you set the slave
|
|
/// select pin to be other than the usual SS pin (D53 on Mega 2560), you may
|
|
/// need to set the usual SS pin to be an output to force the Arduino into SPI
|
|
/// master mode.
|
|
///
|
|
/// Caution: Power supply requirements of the RFM module may be relevant in some circumstances:
|
|
/// RFM95/96/97/98 modules are capable of pulling 120mA+ at full power, where Arduino's 3.3V line can
|
|
/// give 50mA. You may need to make provision for alternate power supply for
|
|
/// the RFM module, especially if you wish to use full transmit power, and/or you have
|
|
/// other shields demanding power. Inadequate power for the RFM is likely to cause symptoms such as:
|
|
/// - reset's/bootups terminate with "init failed" messages
|
|
/// - random termination of communication after 5-30 packets sent/received
|
|
/// - "fake ok" state, where initialization passes fluently, but communication doesn't happen
|
|
/// - shields hang Arduino boards, especially during the flashing
|
|
///
|
|
/// \par Interrupts
|
|
///
|
|
/// The BG_RF95 driver uses interrupts to react to events in the RFM module,
|
|
/// such as the reception of a new packet, or the completion of transmission
|
|
/// of a packet. The BG_RF95 driver interrupt service routine reads status from
|
|
/// and writes data to the the RFM module via the SPI interface. It is very
|
|
/// important therefore, that if you are using the BG_RF95 driver with another
|
|
/// SPI based deviced, that you disable interrupts while you transfer data to
|
|
/// and from that other device. Use cli() to disable interrupts and sei() to
|
|
/// reenable them.
|
|
///
|
|
/// \par Memory
|
|
///
|
|
/// The BG_RF95 driver requires non-trivial amounts of memory. The sample
|
|
/// programs all compile to about 8kbytes each, which will fit in the
|
|
/// flash proram memory of most Arduinos. However, the RAM requirements are
|
|
/// more critical. Therefore, you should be vary sparing with RAM use in
|
|
/// programs that use the BG_RF95 driver.
|
|
///
|
|
/// It is often hard to accurately identify when you are hitting RAM limits on Arduino.
|
|
/// The symptoms can include:
|
|
/// - Mysterious crashes and restarts
|
|
/// - Changes in behaviour when seemingly unrelated changes are made (such as adding print() statements)
|
|
/// - Hanging
|
|
/// - Output from Serial.print() not appearing
|
|
///
|
|
/// \par Range
|
|
///
|
|
/// We have made some simple range tests under the following conditions:
|
|
/// - rf95_client base station connected to a VHF discone antenna at 8m height above ground
|
|
/// - rf95_server mobile connected to 17.3cm 1/4 wavelength antenna at 1m height, no ground plane.
|
|
/// - Both configured for 13dBm, 434MHz, Bw = 125 kHz, Cr = 4/8, Sf = 4096chips/symbol, CRC on. Slow+long range
|
|
/// - Minimum reported RSSI seen for successful comms was about -91
|
|
/// - Range over flat ground through heavy trees and vegetation approx 2km.
|
|
/// - At 20dBm (100mW) otherwise identical conditions approx 3km.
|
|
/// - At 20dBm, along salt water flat sandy beach, 3.2km.
|
|
///
|
|
/// It should be noted that at this data rate, a 12 octet message takes 2 seconds to transmit.
|
|
///
|
|
/// At 20dBm (100mW) with Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on.
|
|
/// (Default medium range) in the conditions described above.
|
|
/// - Range over flat ground through heavy trees and vegetation approx 2km.
|
|
///
|
|
/// \par Transmitter Power
|
|
///
|
|
/// You can control the transmitter power on the RF transceiver
|
|
/// with the BG_RF95::setTxPower() function. The argument can be any of
|
|
/// +5 to +23 (for modules that use PA_BOOST)
|
|
/// -1 to +14 (for modules that use RFO transmitter pin)
|
|
/// The default is 13. Eg:
|
|
/// \code
|
|
/// driver.setTxPower(10); // use PA_BOOST transmitter pin
|
|
/// driver.setTxPower(10, true); // use PA_RFO pin transmitter pin
|
|
/// \endcode
|
|
///
|
|
/// We have made some actual power measurements against
|
|
/// programmed power for Anarduino MiniWirelessLoRa (which has RFM96W-433Mhz installed)
|
|
/// - MiniWirelessLoRa RFM96W-433Mhz, USB power
|
|
/// - 30cm RG316 soldered direct to RFM96W module ANT and GND
|
|
/// - SMA connector
|
|
/// - 12db attenuator
|
|
/// - SMA connector
|
|
/// - MiniKits AD8307 HF/VHF Power Head (calibrated against Rohde&Schwartz 806.2020 test set)
|
|
/// - Tektronix TDS220 scope to measure the Vout from power head
|
|
/// \code
|
|
/// Program power Measured Power
|
|
/// dBm dBm
|
|
/// 5 5
|
|
/// 7 7
|
|
/// 9 8
|
|
/// 11 11
|
|
/// 13 13
|
|
/// 15 15
|
|
/// 17 16
|
|
/// 19 18
|
|
/// 20 20
|
|
/// 21 21
|
|
/// 22 22
|
|
/// 23 23
|
|
/// \endcode
|
|
///
|
|
/// We have also measured the actual power output from a Modtronix inAir4 http://modtronix.com/inair4.html
|
|
/// connected to a Teensy 3.1:
|
|
/// Teensy 3.1 this is a 3.3V part, connected directly to:
|
|
/// Modtronix inAir4 with SMA antenna connector, connected as above:
|
|
/// 10cm SMA-SMA cable
|
|
/// - MiniKits AD8307 HF/VHF Power Head (calibrated against Rohde&Schwartz 806.2020 test set)
|
|
/// - Tektronix TDS220 scope to measure the Vout from power head
|
|
/// \code
|
|
/// Program power Measured Power
|
|
/// dBm dBm
|
|
/// -1 0
|
|
/// 1 2
|
|
/// 3 4
|
|
/// 5 7
|
|
/// 7 10
|
|
/// 9 13
|
|
/// 11 14.2
|
|
/// 13 15
|
|
/// 14 16
|
|
/// \endcode
|
|
/// (Caution: we dont claim laboratory accuracy for these power measurements)
|
|
/// You would not expect to get anywhere near these powers to air with a simple 1/4 wavelength wire antenna.
|
|
class BG_RF95 : public RHSPIDriver
|
|
{
|
|
public:
|
|
/// \brief Defines register values for a set of modem configuration registers
|
|
///
|
|
/// Defines register values for a set of modem configuration registers
|
|
/// that can be passed to setModemRegisters() if none of the choices in
|
|
/// ModemConfigChoice suit your need setModemRegisters() writes the
|
|
/// register values from this structure to the appropriate registers
|
|
/// to set the desired spreading factor, coding rate and bandwidth
|
|
typedef struct
|
|
{
|
|
uint8_t reg_1d; ///< Value for register BG_RF95_REG_1D_MODEM_CONFIG1
|
|
uint8_t reg_1e; ///< Value for register BG_RF95_REG_1E_MODEM_CONFIG2
|
|
uint8_t reg_26; ///< Value for register BG_RF95_REG_26_MODEM_CONFIG3
|
|
} ModemConfig;
|
|
|
|
/// Choices for setModemConfig() for a selected subset of common
|
|
/// data rates. If you need another configuration,
|
|
/// determine the necessary settings and call setModemRegisters() with your
|
|
/// desired settings. It might be helpful to use the LoRa calculator mentioned in
|
|
/// http://www.semtech.com/images/datasheet/LoraDesignGuide_STD.pdf
|
|
/// These are indexes into MODEM_CONFIG_TABLE. We strongly recommend you use these symbolic
|
|
/// definitions and not their integer equivalents: its possible that new values will be
|
|
/// introduced in later versions (though we will try to avoid it).
|
|
/// Caution: if you are using slow packet rates and long packets with RHReliableDatagram or subclasses
|
|
/// you may need to change the RHReliableDatagram timeout for reliable operations.
|
|
typedef enum
|
|
{
|
|
Bw125Cr45Sf128 = 0, ///< Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Default medium range
|
|
Bw500Cr45Sf128, ///< Bw = 500 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on. Fast+short range
|
|
Bw31_25Cr48Sf512, ///< Bw = 31.25 kHz, Cr = 4/8, Sf = 512chips/symbol, CRC on. Slow+long range
|
|
Bw125Cr48Sf4096, ///< Bw = 125 kHz, Cr = 4/8, Sf = 4096chips/symbol, CRC on. Slow+long range
|
|
Bw125Cr45Sf4096, ///< APRS
|
|
Bw125Cr45Sf2048, ///< M0IGA Messup speed / 698baud (not 1200)
|
|
Bw125Cr47Sf512, ///< corrected 1200 baud
|
|
} ModemConfigChoice;
|
|
|
|
/// Constructor. You can have multiple instances, but each instance must have its own
|
|
/// interrupt and slave select pin. After constructing, you must call init() to initialise the interface
|
|
/// and the radio module. A maximum of 3 instances can co-exist on one processor, provided there are sufficient
|
|
/// distinct interrupt lines, one for each instance.
|
|
/// \param[in] slaveSelectPin the Arduino pin number of the output to use to select the RH_RF22 before
|
|
/// accessing it. Defaults to the normal SS pin for your Arduino (D10 for Diecimila, Uno etc, D53 for Mega, D10 for Maple)
|
|
/// \param[in] interruptPin The interrupt Pin number that is connected to the RFM DIO0 interrupt line.
|
|
/// Defaults to pin 2, as required by Anarduino MinWirelessLoRa module.
|
|
/// Caution: You must specify an interrupt capable pin.
|
|
/// On many Arduino boards, there are limitations as to which pins may be used as interrupts.
|
|
/// On Leonardo pins 0, 1, 2 or 3. On Mega2560 pins 2, 3, 18, 19, 20, 21. On Due and Teensy, any digital pin.
|
|
/// On Arduino Zero from arduino.cc, any digital pin other than 4.
|
|
/// On Arduino M0 Pro from arduino.org, any digital pin other than 2.
|
|
/// On other Arduinos pins 2 or 3.
|
|
/// See http://arduino.cc/en/Reference/attachInterrupt for more details.
|
|
/// On Chipkit Uno32, pins 38, 2, 7, 8, 35.
|
|
/// On other boards, any digital pin may be used.
|
|
/// \param[in] spi Pointer to the SPI interface object to use.
|
|
/// Defaults to the standard Arduino hardware SPI interface
|
|
BG_RF95(uint8_t slaveSelectPin = SS, uint8_t interruptPin = 2, RHGenericSPI& spi = hardware_spi);
|
|
|
|
/// Initialise the Driver transport hardware and software.
|
|
/// Make sure the Driver is properly configured before calling init().
|
|
/// \return true if initialisation succeeded.
|
|
virtual bool init();
|
|
|
|
/// Prints the value of all chip registers
|
|
/// to the Serial device if RH_HAVE_SERIAL is defined for the current platform
|
|
/// For debugging purposes only.
|
|
/// \return true on success
|
|
bool printRegisters();
|
|
|
|
/// Sets all the registered required to configure the data modem in the RF95/96/97/98, including the bandwidth,
|
|
/// spreading factor etc. You can use this to configure the modem with custom configurations if none of the
|
|
/// canned configurations in ModemConfigChoice suit you.
|
|
/// \param[in] config A ModemConfig structure containing values for the modem configuration registers.
|
|
void setModemRegisters(const ModemConfig* config);
|
|
|
|
/// Select one of the predefined modem configurations. If you need a modem configuration not provided
|
|
/// here, use setModemRegisters() with your own ModemConfig.
|
|
/// \param[in] index The configuration choice.
|
|
/// \return true if index is a valid choice.
|
|
bool setModemConfig(ModemConfigChoice index);
|
|
|
|
/// Tests whether a new message is available
|
|
/// from the Driver.
|
|
/// On most drivers, this will also put the Driver into RHModeRx mode until
|
|
/// a message is actually received by the transport, when it wil be returned to RHModeIdle.
|
|
/// This can be called multiple times in a timeout loop
|
|
/// \return true if a new, complete, error-free uncollected message is available to be retreived by recv()
|
|
virtual bool available();
|
|
|
|
/// Turns the receiver on if it not already on.
|
|
/// If there is a valid message available, copy it to buf and return true
|
|
/// else return false.
|
|
/// If a message is copied, *len is set to the length (Caution, 0 length messages are permitted).
|
|
/// You should be sure to call this function frequently enough to not miss any messages
|
|
/// It is recommended that you call it in your main loop.
|
|
/// \param[in] buf Location to copy the received message
|
|
/// \param[in,out] len Pointer to available space in buf. Set to the actual number of octets copied.
|
|
/// \return true if a valid message was copied to buf
|
|
virtual bool recv(uint8_t* buf, uint8_t* len);
|
|
|
|
// added BG APRS Packets are sent with 3-Byte header
|
|
// turn on promiscuous
|
|
virtual bool recvAPRS(uint8_t* buf, uint8_t* len);
|
|
|
|
/// Waits until any previous transmit packet is finished being transmitted with waitPacketSent().
|
|
/// Then loads a message into the transmitter and starts the transmitter. Note that a message length
|
|
/// of 0 is permitted.
|
|
/// \param[in] data Array of data to be sent
|
|
/// \param[in] len Number of bytes of data to send
|
|
/// \return true if the message length was valid and it was correctly queued for transmit
|
|
virtual bool send(const uint8_t* data, uint8_t len);
|
|
|
|
// Send APRS Header Format
|
|
virtual bool sendAPRS(const uint8_t* data, uint8_t len);
|
|
|
|
virtual uint8_t lastSNR();
|
|
|
|
/// Sets the length of the preamble
|
|
/// in bytes.
|
|
/// Caution: this should be set to the same
|
|
/// value on all nodes in your network. Default is 8.
|
|
/// Sets the message preamble length in BG_RF95_REG_??_PREAMBLE_?SB
|
|
/// \param[in] bytes Preamble length in bytes.
|
|
void setPreambleLength(uint16_t bytes);
|
|
|
|
/// Returns the maximum message length
|
|
/// available in this Driver.
|
|
/// \return The maximum legal message length
|
|
virtual uint8_t maxMessageLength();
|
|
|
|
/// Sets the transmitter and receiver
|
|
/// centre frequency.
|
|
/// \param[in] centre Frequency in MHz. 137.0 to 1020.0. Caution: RFM95/96/97/98 comes in several
|
|
/// different frequency ranges, and setting a frequency outside that range of your radio will probably not work
|
|
/// \return true if the selected frquency centre is within range
|
|
bool setFrequency(float centre);
|
|
|
|
/// If current mode is Rx or Tx changes it to Idle. If the transmitter or receiver is running,
|
|
/// disables them.
|
|
void setModeIdle();
|
|
|
|
/// If current mode is Tx or Idle, changes it to Rx.
|
|
/// Starts the receiver in the RF95/96/97/98.
|
|
void setModeRx();
|
|
|
|
/// If current mode is Rx or Idle, changes it to Rx. F
|
|
/// Starts the transmitter in the RF95/96/97/98.
|
|
void setModeTx();
|
|
|
|
/// Sets the transmitter power output level, and configures the transmitter pin.
|
|
/// Be a good neighbour and set the lowest power level you need.
|
|
/// Some SX1276/77/78/79 and compatible modules (such as RFM95/96/97/98)
|
|
/// use the PA_BOOST transmitter pin for high power output (and optionally the PA_DAC)
|
|
/// while some (such as the Modtronix inAir4 and inAir9)
|
|
/// use the RFO transmitter pin for lower power but higher efficiency.
|
|
/// You must set the appropriate power level and useRFO argument for your module.
|
|
/// Check with your module manufacturer which transmtter pin is used on your module
|
|
/// to ensure you are setting useRFO correctly.
|
|
/// Failure to do so will result in very low
|
|
/// transmitter power output.
|
|
/// Caution: legal power limits may apply in certain countries.
|
|
/// After init(), the power will be set to 13dBm, with useRFO false (ie PA_BOOST enabled).
|
|
/// \param[in] power Transmitter power level in dBm. For RFM95/96/97/98 LORA with useRFO false,
|
|
/// valid values are from +5 to +23.
|
|
/// For Modtronix inAir4 and inAir9 with useRFO true (ie RFO pins in use),
|
|
/// valid values are from -1 to 14.
|
|
/// \param[in] useRFO If true, enables the use of the RFO transmitter pins instead of
|
|
/// the PA_BOOST pin (false). Choose the correct setting for your module.
|
|
void setTxPower(int8_t power, bool useRFO = false);
|
|
|
|
/// Sets the radio into low-power sleep mode.
|
|
/// If successful, the transport will stay in sleep mode until woken by
|
|
/// changing mode it idle, transmit or receive (eg by calling send(), recv(), available() etc)
|
|
/// Caution: there is a time penalty as the radio takes a finite time to wake from sleep mode.
|
|
/// \return true if sleep mode was successfully entered.
|
|
virtual bool sleep();
|
|
|
|
protected:
|
|
/// This is a low level function to handle the interrupts for one instance of BG_RF95.
|
|
/// Called automatically by isr*()
|
|
/// Should not need to be called by user code.
|
|
void handleInterrupt();
|
|
|
|
/// Examine the revceive buffer to determine whether the message is for this node
|
|
void validateRxBuf();
|
|
|
|
/// Clear our local receive buffer
|
|
void clearRxBuf();
|
|
|
|
private:
|
|
/// Low level interrupt service routine for device connected to interrupt 0
|
|
static void isr0();
|
|
|
|
/// Low level interrupt service routine for device connected to interrupt 1
|
|
static void isr1();
|
|
|
|
/// Low level interrupt service routine for device connected to interrupt 1
|
|
static void isr2();
|
|
|
|
/// Array of instances connected to interrupts 0 and 1
|
|
static BG_RF95* _deviceForInterrupt[];
|
|
|
|
/// Index of next interrupt number to use in _deviceForInterrupt
|
|
static uint8_t _interruptCount;
|
|
|
|
/// The configured interrupt pin connected to this instance
|
|
uint8_t _interruptPin;
|
|
|
|
/// The index into _deviceForInterrupt[] for this device (if an interrupt is already allocated)
|
|
/// else 0xff
|
|
uint8_t _myInterruptIndex;
|
|
|
|
/// Number of octets in the buffer
|
|
volatile uint8_t _bufLen;
|
|
|
|
/// The receiver/transmitter buffer
|
|
uint8_t _buf[BG_RF95_MAX_PAYLOAD_LEN];
|
|
|
|
/// True when there is a valid message in the buffer
|
|
volatile bool _rxBufValid;
|
|
};
|
|
|
|
/// @example rf95_client.pde
|
|
/// @example rf95_server.pde
|
|
/// @example rf95_reliable_datagram_client.pde
|
|
/// @example rf95_reliable_datagram_server.pde
|
|
|
|
#endif
|
|
|