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RFM69_LowPowerLab
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Merge pull request #23 from damadmai/defaults 

Fixed FIFO & SS Pin init, incorporated Optimized Freq. Hopping Seq.
This commit is contained in:
Felix Rusu 2015-01-19 23:18:44 -05:00
parent 6052ef8dae 3899f1f018
commit 602d94e9b8
1 changed files with 15 additions and 3 deletions
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18
RFM69.cpp
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@ -70,6 +70,7 @@ bool RFM69::initialize(uint8_t freqBand, uint8_t nodeID, uint8_t networkID)
/* 0x19 */ { REG_RXBW, RF_RXBW_DCCFREQ_010 | RF_RXBW_MANT_16 | RF_RXBW_EXP_2 }, // (BitRate < 2 * RxBw)
//for BR-19200: /* 0x19 */ { REG_RXBW, RF_RXBW_DCCFREQ_010 | RF_RXBW_MANT_24 | RF_RXBW_EXP_3 },
/* 0x25 */ { REG_DIOMAPPING1, RF_DIOMAPPING1_DIO0_01 }, // DIO0 is the only IRQ we're using
/* 0x28 */ { REG_IRQFLAGS2, RF_IRQFLAGS2_FIFOOVERRUN }, // writing to this bit ensures that the FIFO & status flags are reset
/* 0x29 */ { REG_RSSITHRESH, 220 }, // must be set to dBm = (-Sensitivity / 2), default is 0xE4 = 228 so -114dBm
///* 0x2D */ { REG_PREAMBLELSB, RF_PREAMBLESIZE_LSB_VALUE } // default 3 preamble bytes 0xAAAAAA
/* 0x2E */ { REG_SYNCCONFIG, RF_SYNC_ON | RF_SYNC_FIFOFILL_AUTO | RF_SYNC_SIZE_2 | RF_SYNC_TOL_0 },
@ -86,6 +87,7 @@ bool RFM69::initialize(uint8_t freqBand, uint8_t nodeID, uint8_t networkID)
{255, 0}
};
digitalWrite(_slaveSelectPin, HIGH);
pinMode(_slaveSelectPin, OUTPUT);
SPI.begin();
@ -118,16 +120,24 @@ uint32_t RFM69::getFrequency()
// set the frequency (in Hz)
void RFM69::setFrequency(uint32_t freqHz)
{
// TODO: datasheet p38 hopping sequence may need to be followed in some cases
uint8_t oldMode = _mode;
if (oldMode == RF69_MODE_TX) {
setMode(RF69_MODE_RX);
}
freqHz /= RF69_FSTEP; // divide down by FSTEP to get FRF
writeReg(REG_FRFMSB, freqHz >> 16);
writeReg(REG_FRFMID, freqHz >> 8);
writeReg(REG_FRFLSB, freqHz);
if (oldMode == RF69_MODE_RX) {
setMode(RF69_MODE_SYNTH);
}
setMode(oldMode);
}
void RFM69::setMode(uint8_t newMode)
{
if (newMode == _mode) return; // TODO: can remove this?
if (newMode == _mode)
return;
switch (newMode) {
case RF69_MODE_TX:
@ -147,7 +157,8 @@ void RFM69::setMode(uint8_t newMode)
case RF69_MODE_SLEEP:
writeReg(REG_OPMODE, (readReg(REG_OPMODE) & 0xE3) | RF_OPMODE_SLEEP);
break;
default: return;
default:
return;
}
// we are using packet mode, so this check is not really needed
@ -446,6 +457,7 @@ void RFM69::setHighPowerRegs(bool onOff) {
void RFM69::setCS(uint8_t newSPISlaveSelect) {
_slaveSelectPin = newSPISlaveSelect;
digitalWrite(_slaveSelectPin, HIGH);
pinMode(_slaveSelectPin, OUTPUT);
}