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sx127x 20dBm support #79

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sx127x 20dBm support #79

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27 changes: 27 additions & 0 deletions src/LoRa.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
#define REG_FRF_MID 0x07
#define REG_FRF_LSB 0x08
#define REG_PA_CONFIG 0x09
#define REG_OCP 0x0b
#define REG_LNA 0x0c
#define REG_FIFO_ADDR_PTR 0x0d
#define REG_FIFO_TX_BASE_ADDR 0x0e
Expand All @@ -31,6 +32,7 @@
#define REG_SYNC_WORD 0x39
#define REG_DIO_MAPPING_1 0x40
#define REG_VERSION 0x42
#define REG_PA_DAC 0x4d

// modes
#define MODE_LONG_RANGE_MODE 0x80
Expand Down Expand Up @@ -426,6 +428,31 @@ void LoRaClass::disableCrc()
writeRegister(REG_MODEM_CONFIG_2, readRegister(REG_MODEM_CONFIG_2) & 0xfb);
}

void LoRaClass::set20dBm_sx127x(bool turn_on)
{
if (turn_on) {
writeRegister(REG_PA_CONFIG, PA_BOOST | (17 - 2));
writeRegister(REG_PA_DAC, 0x87); //Value for High Power
setOCP_sx127x(140);
}
else {
writeRegister(REG_PA_DAC, 0x84); //Default value PA_HF/LF or +17dBm
setOCP_sx127x(100);
}
}

void LoRaClass::setOCP_sx127x(uint8_t mA)
{
uint8_t ocpTrim = 27;
if (mA <= 120) {
ocpTrim = (mA - 45)/5;
}
else if (mA <=240) {
ocpTrim = (mA + 30)/10;
}
writeRegister(REG_OCP, 0x20 | (0x1F & ocpTrim));
}

byte LoRaClass::random()
{
return readRegister(REG_RSSI_WIDEBAND);
Expand Down
6 changes: 6 additions & 0 deletions src/LoRa.h
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,12 @@ class LoRaClass : public Stream {
void enableCrc();
void disableCrc();

// High Power +20 dBm Operation (Semtech SX1276/77/78/79 5.4.3.)
// Only with PA_BOOST pin connected
void set20dBm_sx127x(bool turn_on);
// Over Current Protection control (Semtech SX1276/77/78/79 5.4.4.)
void setOCP_sx127x(uint8_t mA);

// deprecated
void crc() { enableCrc(); }
void noCrc() { disableCrc(); }
Expand Down