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Added register values and op-codes. Cleanup.

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This commit is contained in:
Mark Qvist 2024-02-13 14:19:14 +01:00
parent fe50c2cac9
commit cec979997e
4 changed files with 80 additions and 37 deletions
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105
sx126x.cpp
View File

@ -43,12 +43,20 @@
#define OP_WRITE_REGISTER_6X 0x0D
#define OP_DIO3_TCXO_CTRL_6X 0x97
#define OP_DIO2_RF_CTRL_6X 0x9D
#define OP_CAD_PARAMS 0x88
#define OP_CALIBRATE_6X 0x89
#define OP_RX_TX_FALLBACK_MODE_6X 0x93
#define OP_REGULATOR_MODE_6X 0x96
#define OP_CALIBRATE_IMAGE_6X 0x98
#define MASK_CALIBRATE_ALL 0x7f
#define IRQ_TX_DONE_MASK_6X 0x01
#define IRQ_RX_DONE_MASK_6X 0x02
#define IRQ_HEADER_DET_MASK_6X 0x10
#define IRQ_PREAMBLE_DET_MASK_6X 0x04
#define IRQ_PAYLOAD_CRC_ERROR_MASK_6X 0x40
#define IRQ_ALL_MASK_6X 0b0100001111111111
#define MODE_LONG_RANGE_MODE_6X 0x01
@ -70,6 +78,12 @@
#define MODE_TCXO_1_7V_6X 0x01
#define MODE_TCXO_1_6V_6X 0x00
#define MODE_STDBY_RC_6X 0x00
#define MODE_STDBY_XOSC_6X 0x01
#define MODE_FALLBACK_STDBY_RC_6X 0x20
#define MODE_IMPLICIT_HEADER 0x01
#define MODE_EXPLICIT_HEADER 0x00
#define SYNC_WORD_6X 0x1424
#define XTAL_FREQ_6X (double)32000000
@ -331,6 +345,46 @@ void sx126x::reset(void) {
}
}
void sx126x::calibrate(void) {
// Put in STDBY_RC mode before calibration
uint8_t mode_byte = MODE_STDBY_RC_6X;
executeOpcode(OP_STANDBY_6X, &mode_byte, 1);
// calibrate RC64k, RC13M, PLL, ADC and image
uint8_t calibrate = MASK_CALIBRATE_ALL;
executeOpcode(OP_CALIBRATE_6X, &calibrate, 1);
delay(5);
waitOnBusy();
}
void sx126x::calibrate_image(long frequency) {
uint8_t image_freq[2] = {0};
if (frequency >= 430E6 && frequency <= 440E6) {
image_freq[0] = 0x6B;
image_freq[1] = 0x6F;
}
else if (frequency >= 470E6 && frequency <= 510E6) {
image_freq[0] = 0x75;
image_freq[1] = 0x81;
}
else if (frequency >= 779E6 && frequency <= 787E6) {
image_freq[0] = 0xC1;
image_freq[1] = 0xC5;
}
else if (frequency >= 863E6 && frequency <= 870E6) {
image_freq[0] = 0xD7;
image_freq[1] = 0xDB;
}
else if (frequency >= 902E6 && frequency <= 928E6) {
image_freq[0] = 0xE1;
image_freq[1] = 0xE9;
}
executeOpcode(OP_CALIBRATE_IMAGE_6X, image_freq, 2);
waitOnBusy();
}
int sx126x::begin(long frequency)
{
@ -350,20 +404,13 @@ int sx126x::begin(long frequency)
pinMode(_rxen, OUTPUT);
}
// Put in STDBY_RC mode before calibration
uint8_t mode_byte = 0x00;
executeOpcode(OP_STANDBY_6X, &mode_byte, 1);
calibrate();
calibrate_image(frequency);
// calibrate RC64k, RC13M, PLL, ADC and image
uint8_t calibrate = 0x7F;
executeOpcode(OP_CALIBRATE_6X, &calibrate, 1);
#if HAS_TCXO
enableTCXO();
#endif
enableTCXO();
loraMode();
idle();
standby();
// Set sync word
setSyncWord(SYNC_WORD_6X);
@ -408,8 +455,7 @@ void sx126x::end()
int sx126x::beginPacket(int implicitHeader)
{
// put in standby mode
idle();
standby();
if (implicitHeader) {
implicitHeaderMode();
@ -654,12 +700,12 @@ void sx126x::receive(int size)
executeOpcode(OP_RX_6X, mode, 3);
}
void sx126x::idle()
void sx126x::standby()
{
// STDBY_XOSC
uint8_t byte = 0x01;
uint8_t byte = MODE_STDBY_XOSC_6X;
// STDBY_RC
// uint8_t byte = 0x00;
// uint8_t byte = MODE_STDBY_RC_6X;
executeOpcode(OP_STANDBY_6X, &byte, 1);
}
@ -670,19 +716,18 @@ void sx126x::sleep()
}
void sx126x::enableTCXO() {
// only tested for RAK4630, voltage may be different on other platforms
#if HAS_TCXO
#if BOARD_MODEL == BOARD_RAK4630
uint8_t buf[4] = {MODE_TCXO_3_3V_6X, 0x00, 0x00, 0xFF};
#elif BOARD_MODEL == BOARD_TBEAM
uint8_t buf[4] = {MODE_TCXO_1_8V_6X, 0x00, 0x00, 0xFF};
#endif
executeOpcode(OP_DIO3_TCXO_CTRL_6X, buf, 4);
#endif
}
void sx126x::disableTCXO() {
// currently cannot disable on SX1262?
}
// TODO: Once enabled, SX1262 needs a complete reset to disable TCXO
void sx126x::disableTCXO() { }
void sx126x::setTxPower(int level, int outputPin) {
// currently no low power mode for SX1262 implemented, assuming PA boost
@ -693,26 +738,22 @@ void sx126x::setTxPower(int level, int outputPin) {
uint8_t pa_buf[4];
pa_buf[0] = 0x04;
pa_buf[1] = 0x07;
pa_buf[2] = 0x00;
pa_buf[3] = 0x01;
pa_buf[0] = 0x04; // PADutyCycle needs to be 0x04 to achieve 22dBm output, but can be lowered for better efficiency at lower outputs
pa_buf[1] = 0x07; // HPMax at 0x07 is maximum supported for SX1262
pa_buf[2] = 0x00; // DeviceSel 0x00 for SX1262 (0x01 for SX1261)
pa_buf[3] = 0x01; // PALut always 0x01 (reserved according to datasheet)
executeOpcode(OP_PA_CONFIG_6X, pa_buf, 4); // set pa_config for high power
if (level > 22) {
level = 22;
}
else if (level < -9) {
level = -9;
}
if (level > 22) { level = 22; }
else if (level < -9) { level = -9; }
writeRegister(REG_OCP_6X, 0x38); // 160mA limit, overcurrent protection
uint8_t tx_buf[2];
tx_buf[0] = level;
tx_buf[1] = 0x02; // ramping time - 40 microseconds
tx_buf[1] = 0x02; // PA ramping time - 40 microseconds
executeOpcode(OP_TX_PARAMS_6X, tx_buf, 2);

4
sx126x.h
View File

@ -55,7 +55,7 @@ public:
void onReceive(void(*callback)(int));
void receive(int size = 0);
void idle();
void standby();
void sleep();
bool preInit();
@ -113,6 +113,8 @@ private:
void optimizeModemSensitivity();
void reset(void);
void calibrate(void);
void calibrate_image(long frequency);
private:
SPISettings _spiSettings;

6
sx127x.cpp
View File

@ -90,7 +90,7 @@ void sx127x::setSPIFrequency(uint32_t frequency) { _spiSettings = SPISettings(fr
void sx127x::setPins(int ss, int reset, int dio0, int busy) { _ss = ss; _reset = reset; _dio0 = dio0; _busy = busy; }
uint8_t ISR_VECT sx127x::readRegister(uint8_t address) { return singleTransfer(address & 0x7f, 0x00); }
void sx127x::writeRegister(uint8_t address, uint8_t value) { singleTransfer(address | 0x80, value); }
void sx127x::idle() { writeRegister(REG_OP_MODE_7X, MODE_LONG_RANGE_MODE_7X | MODE_STDBY_7X); }
void sx127x::standby() { writeRegister(REG_OP_MODE_7X, MODE_LONG_RANGE_MODE_7X | MODE_STDBY_7X); }
void sx127x::sleep() { writeRegister(REG_OP_MODE_7X, MODE_LONG_RANGE_MODE_7X | MODE_SLEEP_7X); }
uint8_t sx127x::modemStatus() { return readRegister(REG_MODEM_STAT_7X); }
void sx127x::setSyncWord(uint8_t sw) { writeRegister(REG_SYNC_WORD_7X, sw); }
@ -168,7 +168,7 @@ int sx127x::begin(long frequency) {
enableCrc();
setTxPower(2);
idle();
standby();
return 1;
}
@ -180,7 +180,7 @@ void sx127x::end() {
}
int sx127x::beginPacket(int implicitHeader) {
idle();
standby();
if (implicitHeader) {
implicitHeaderMode();

2
sx127x.h
View File

@ -53,7 +53,7 @@ public:
void onReceive(void(*callback)(int));
void receive(int size = 0);
void idle();
void standby();
void sleep();
bool preInit();