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RFM69_LowPowerLab
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Follow Optimized Frequency Hopping Sequence 

by cf13c60ae5
Don't remove "if (newMode == _mode)" to prevent unnecessary mode switching by setFrequency()
This commit is contained in:
Daniel A. Maierhofer 2015-01-18 12:22:43 +01:00
parent c491a2ab82
commit 8cecd36d9b
1 changed files with 12 additions and 3 deletions
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15
RFM69.cpp
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@ -119,16 +119,24 @@ uint32_t RFM69::getFrequency()
// set the frequency (in Hz) // set the frequency (in Hz)
void RFM69::setFrequency(uint32_t freqHz) 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 freqHz /= RF69_FSTEP; // divide down by FSTEP to get FRF
writeReg(REG_FRFMSB, freqHz >> 16); writeReg(REG_FRFMSB, freqHz >> 16);
writeReg(REG_FRFMID, freqHz >> 8); writeReg(REG_FRFMID, freqHz >> 8);
writeReg(REG_FRFLSB, freqHz); writeReg(REG_FRFLSB, freqHz);
if (oldMode == RF69_MODE_RX) {
setMode(RF69_MODE_SYNTH);
}
setMode(oldMode);
} }
void RFM69::setMode(uint8_t newMode) void RFM69::setMode(uint8_t newMode)
{ {
if (newMode == _mode) return; // TODO: can remove this? if (newMode == _mode)
return;
switch (newMode) { switch (newMode) {
case RF69_MODE_TX: case RF69_MODE_TX:
@ -148,7 +156,8 @@ void RFM69::setMode(uint8_t newMode)
case RF69_MODE_SLEEP: case RF69_MODE_SLEEP:
writeReg(REG_OPMODE, (readReg(REG_OPMODE) & 0xE3) | RF_OPMODE_SLEEP); writeReg(REG_OPMODE, (readReg(REG_OPMODE) & 0xE3) | RF_OPMODE_SLEEP);
break; break;
default: return; default:
return;
} }
// we are using packet mode, so this check is not really needed // we are using packet mode, so this check is not really needed