bool RH_RF24::init()
{
if (!RHSPIDriver::init())
return false;
// Determine the interrupt number that corresponds to the interruptPin
int interruptNumber = digitalPinToInterrupt(_interruptPin);
if (interruptNumber == NOT_AN_INTERRUPT)
return false;
#ifdef RH_ATTACHINTERRUPT_TAKES_PIN_NUMBER
interruptNumber = _interruptPin;
#endif
// Tell the low level SPI interface we will use SPI within this interrupt
spiUsingInterrupt(interruptNumber);
// Initialise the radio
power_on_reset();
cmd_clear_all_interrupts();
// Get the device type and check it
// This also tests whether we are really connected to a device
uint8_t buf[8];
if (!command(RH_RF24_CMD_PART_INFO, 0, 0, buf, sizeof(buf)))
return false; // SPI error? Not connected?
_deviceType = (buf[1] << 8) | buf[2];
// Check PART to be either 0x4460, 0x4461, 0x4463, 0x4464
if (_deviceType != 0x4460 &&
_deviceType != 0x4461 &&
_deviceType != 0x4463 &&
_deviceType != 0x4464)
return false; // Unknown radio type, or not connected
// Here we use a configuration generated by the Silicon Labs Wireless Development Suite
// #included above
// We override a few things later that we ned to be sure of.
configure(RF24_CONFIGURATION_DATA);
// Add by Adrien van den Bossche <*****@*****.**> for Teensy
// ARM M4 requires the below. else pin interrupt doesn't work properly.
// On all other platforms, its innocuous, belt and braces
pinMode(_interruptPin, INPUT);
// Set up interrupt handler
// Since there are a limited number of interrupt glue functions isr*() available,
// we can only support a limited number of devices simultaneously
// ON some devices, notably most Arduinos, the interrupt pin passed in is actuallt the
// interrupt number. You have to figure out the interruptnumber-to-interruptpin mapping
// yourself based on knwledge of what Arduino board you are running on.
if (_myInterruptIndex == 0xff)
{
// First run, no interrupt allocated yet
if (_interruptCount <= RH_RF24_NUM_INTERRUPTS)
_myInterruptIndex = _interruptCount++;
else
return false; // Too many devices, not enough interrupt vectors
}
_deviceForInterrupt[_myInterruptIndex] = this;
if (_myInterruptIndex == 0)
attachInterrupt(interruptNumber, isr0, FALLING);
else if (_myInterruptIndex == 1)
attachInterrupt(interruptNumber, isr1, FALLING);
else if (_myInterruptIndex == 2)
attachInterrupt(interruptNumber, isr2, FALLING);
else
return false; // Too many devices, not enough interrupt vectors
// Ensure we get the interrupts we need, irrespective of whats in the radio_config
uint8_t int_ctl[] = {RH_RF24_MODEM_INT_STATUS_EN | RH_RF24_PH_INT_STATUS_EN, 0xff, 0xff, 0x00 };
set_properties(RH_RF24_PROPERTY_INT_CTL_ENABLE, int_ctl, sizeof(int_ctl));
// RSSI Latching should be configured in MODEM_RSSI_CONTROL in radio_config
// PKT_TX_THRESHOLD and PKT_RX_THRESHOLD should be set to about 0x30 in radio_config
// Configure important RH_RF24 registers
// Here we set up the standard packet format for use by the RH_RF24 library:
// We will use FIFO Mode, with automatic packet generation
// We have 2 fields:
// Field 1 contains only the (variable) length of field 2, with CRC
// Field 2 contains the variable length payload and the CRC
// Hmmm, having no CRC on field 1 and CRC on field 2 causes CRC errors when resetting after an odd
// number of packets! Anyway its prob a good thing at the cost of some airtime.
// Hmmm, enabling WHITEN stops it working!
uint8_t pkt_config1[] = { 0x00 };
set_properties(RH_RF24_PROPERTY_PKT_CONFIG1, pkt_config1, sizeof(pkt_config1));
uint8_t pkt_len[] = { 0x02, 0x01, 0x00 };
set_properties(RH_RF24_PROPERTY_PKT_LEN, pkt_len, sizeof(pkt_len));
uint8_t pkt_field1[] = { 0x00, 0x01, 0x00, RH_RF24_FIELD_CONFIG_CRC_START | RH_RF24_FIELD_CONFIG_SEND_CRC | RH_RF24_FIELD_CONFIG_CHECK_CRC | RH_RF24_FIELD_CONFIG_CRC_ENABLE };
set_properties(RH_RF24_PROPERTY_PKT_FIELD_1_LENGTH_12_8, pkt_field1, sizeof(pkt_field1));
uint8_t pkt_field2[] = { 0x00, sizeof(_buf), 0x00, RH_RF24_FIELD_CONFIG_CRC_START | RH_RF24_FIELD_CONFIG_SEND_CRC | RH_RF24_FIELD_CONFIG_CHECK_CRC | RH_RF24_FIELD_CONFIG_CRC_ENABLE };
set_properties(RH_RF24_PROPERTY_PKT_FIELD_2_LENGTH_12_8, pkt_field2, sizeof(pkt_field2));
// Clear all other fields so they are never used, irrespective of the radio_config
uint8_t pkt_fieldn[] = { 0x00, 0x00, 0x00, 0x00 };
set_properties(RH_RF24_PROPERTY_PKT_FIELD_3_LENGTH_12_8, pkt_fieldn, sizeof(pkt_fieldn));
set_properties(RH_RF24_PROPERTY_PKT_FIELD_4_LENGTH_12_8, pkt_fieldn, sizeof(pkt_fieldn));
set_properties(RH_RF24_PROPERTY_PKT_FIELD_5_LENGTH_12_8, pkt_fieldn, sizeof(pkt_fieldn));
// The following can be changed later by the user if necessary.
// Set up default configuration
setCRCPolynomial(CRC_16_IBM);
uint8_t syncwords[] = { 0x2d, 0xd4 };
setSyncWords(syncwords, sizeof(syncwords)); // Same as RF22's
// 3 would be sufficient, but this is the same as RF22's
// actualy, 4 seems to work much better for some modulations
setPreambleLength(4);
// Default freq comes from the radio config file
// About 2.4dBm on RFM24:
setTxPower(0x10);
return true;
}
bool RH_RF95::init()
{
if (!RHSPIDriver::init())
return false;
// Determine the interrupt number that corresponds to the interruptPin
int interruptNumber = digitalPinToInterrupt(_interruptPin);
if (interruptNumber == NOT_AN_INTERRUPT)
return false;
#ifdef RH_ATTACHINTERRUPT_TAKES_PIN_NUMBER
interruptNumber = _interruptPin;
#endif
// Tell the low level SPI interface we will use SPI within this interrupt
spiUsingInterrupt(interruptNumber);
// No way to check the device type :-(
// Set sleep mode, so we can also set LORA mode:
spiWrite(RH_RF95_REG_01_OP_MODE, RH_RF95_MODE_SLEEP | RH_RF95_LONG_RANGE_MODE);
delay(10); // Wait for sleep mode to take over from say, CAD
// Check we are in sleep mode, with LORA set
if (spiRead(RH_RF95_REG_01_OP_MODE) != (RH_RF95_MODE_SLEEP | RH_RF95_LONG_RANGE_MODE))
{
// Serial.println(spiRead(RH_RF95_REG_01_OP_MODE), HEX);
return false; // No device present?
}
// Add by Adrien van den Bossche <*****@*****.**> for Teensy
// ARM M4 requires the below. else pin interrupt doesn't work properly.
// On all other platforms, its innocuous, belt and braces
pinMode(_interruptPin, INPUT);
// Set up interrupt handler
// Since there are a limited number of interrupt glue functions isr*() available,
// we can only support a limited number of devices simultaneously
// ON some devices, notably most Arduinos, the interrupt pin passed in is actuallt the
// interrupt number. You have to figure out the interruptnumber-to-interruptpin mapping
// yourself based on knwledge of what Arduino board you are running on.
if (_myInterruptIndex == 0xff)
{
// First run, no interrupt allocated yet
if (_interruptCount <= RH_RF95_NUM_INTERRUPTS)
_myInterruptIndex = _interruptCount++;
else
return false; // Too many devices, not enough interrupt vectors
}
_deviceForInterrupt[_myInterruptIndex] = this;
if (_myInterruptIndex == 0)
attachInterrupt(interruptNumber, isr0, RISING);
else if (_myInterruptIndex == 1)
attachInterrupt(interruptNumber, isr1, RISING);
else if (_myInterruptIndex == 2)
attachInterrupt(interruptNumber, isr2, RISING);
else
return false; // Too many devices, not enough interrupt vectors
// Set up FIFO
// We configure so that we can use the entire 256 byte FIFO for either receive
// or transmit, but not both at the same time
spiWrite(RH_RF95_REG_0E_FIFO_TX_BASE_ADDR, 0);
spiWrite(RH_RF95_REG_0F_FIFO_RX_BASE_ADDR, 0);
// Packet format is preamble + explicit-header + payload + crc
// Explicit Header Mode
// payload is TO + FROM + ID + FLAGS + message data
// RX mode is implmented with RXCONTINUOUS
// max message data length is 255 - 4 = 251 octets
setModeIdle();
// Set up default configuration
// No Sync Words in LORA mode.
setModemConfig(Bw125Cr45Sf128); // Radio default
// setModemConfig(Bw125Cr48Sf4096); // slow and reliable?
setPreambleLength(8); // Default is 8
// An innocuous ISM frequency, same as RF22's
setFrequency(434.0);
// Lowish power
setTxPower(13);
return true;
}
bool RH_RF69::init()
{
if (!RHSPIDriver::init())
return false;
// Determine the interrupt number that corresponds to the interruptPin
int interruptNumber = digitalPinToInterrupt(_interruptPin);
if (interruptNumber == NOT_AN_INTERRUPT)
return false;
#ifdef RH_ATTACHINTERRUPT_TAKES_PIN_NUMBER
interruptNumber = _interruptPin;
#endif
// Tell the low level SPI interface we will use SPI within this interrupt
spiUsingInterrupt(interruptNumber);
// Get the device type and check it
// This also tests whether we are really connected to a device
// My test devices return 0x24
_deviceType = spiRead(RH_RF69_REG_10_VERSION);
if (_deviceType == 00 ||
_deviceType == 0xff)
return false;
// Add by Adrien van den Bossche <*****@*****.**> for Teensy
// ARM M4 requires the below. else pin interrupt doesn't work properly.
// On all other platforms, its innocuous, belt and braces
pinMode(_interruptPin, INPUT);
// Set up interrupt handler
// Since there are a limited number of interrupt glue functions isr*() available,
// we can only support a limited number of devices simultaneously
// ON some devices, notably most Arduinos, the interrupt pin passed in is actuallt the
// interrupt number. You have to figure out the interruptnumber-to-interruptpin mapping
// yourself based on knwledge of what Arduino board you are running on.
if (_myInterruptIndex == 0xff)
{
// First run, no interrupt allocated yet
if (_interruptCount <= RH_RF69_NUM_INTERRUPTS)
_myInterruptIndex = _interruptCount++;
else
return false; // Too many devices, not enough interrupt vectors
}
_deviceForInterrupt[_myInterruptIndex] = this;
if (_myInterruptIndex == 0)
attachInterrupt(interruptNumber, isr0, RISING);
else if (_myInterruptIndex == 1)
attachInterrupt(interruptNumber, isr1, RISING);
else if (_myInterruptIndex == 2)
attachInterrupt(interruptNumber, isr2, RISING);
else
return false; // Too many devices, not enough interrupt vectors
setModeIdle();
// Configure important RH_RF69 registers
// Here we set up the standard packet format for use by the RH_RF69 library:
// 4 bytes preamble
// 2 SYNC words 2d, d4
// 2 CRC CCITT octets computed on the header, length and data (this in the modem config data)
// 0 to 60 bytes data
// RSSI Threshold -114dBm
// We dont use the RH_RF69s address filtering: instead we prepend our own headers to the beginning
// of the RH_RF69 payload
spiWrite(RH_RF69_REG_3C_FIFOTHRESH, RH_RF69_FIFOTHRESH_TXSTARTCONDITION_NOTEMPTY | 0x0f); // thresh 15 is default
// RSSITHRESH is default
// spiWrite(RH_RF69_REG_29_RSSITHRESH, 220); // -110 dbM
// SYNCCONFIG is default. SyncSize is set later by setSyncWords()
// spiWrite(RH_RF69_REG_2E_SYNCCONFIG, RH_RF69_SYNCCONFIG_SYNCON); // auto, tolerance 0
// PAYLOADLENGTH is default
// spiWrite(RH_RF69_REG_38_PAYLOADLENGTH, RH_RF69_FIFO_SIZE); // max size only for RX
// PACKETCONFIG 2 is default
spiWrite(RH_RF69_REG_6F_TESTDAGC, RH_RF69_TESTDAGC_CONTINUOUSDAGC_IMPROVED_LOWBETAOFF);
// If high power boost set previously, disable it
spiWrite(RH_RF69_REG_5A_TESTPA1, RH_RF69_TESTPA1_NORMAL);
spiWrite(RH_RF69_REG_5C_TESTPA2, RH_RF69_TESTPA2_NORMAL);
// The following can be changed later by the user if necessary.
// Set up default configuration
uint8_t syncwords[] = { 0x2d, 0xd4 };
setSyncWords(syncwords, sizeof(syncwords)); // Same as RF22's
// Reasonably fast and reliable default speed and modulation
setModemConfig(GFSK_Rb250Fd250);
// 3 would be sufficient, but this is the same as RF22's
setPreambleLength(4);
// An innocuous ISM frequency, same as RF22's
setFrequency(434.0);
// No encryption
setEncryptionKey(NULL);
// +13dBm, same as power-on default
setTxPower(13);
return true;
}
