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Added support for T3S3 SX1280

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master
Mark Qvist 2 months ago
parent 4e251cd186
commit 35a4b6ff4e
2 changed files with 244 additions and 207 deletions
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  1. 244
      sx128x.cpp
  2. 1
      sx128x.h

244
sx128x.cpp
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@ -38,6 +38,7 @@
#define ISR_VECT
#endif
// SX128x registers
#define OP_RF_FREQ_8X 0x86
#define OP_SLEEP_8X 0x84
#define OP_STANDBY_8X 0x80
@ -111,34 +112,52 @@ sx128x::sx128x() :
setTimeout(0);
}
void ISR_VECT sx128x::onDio0Rise() { sx128x_modem.handleDio0Rise(); }
void sx128x::handleDio0Rise() {
bool ISR_VECT sx128x::getPacketValidity() {
uint8_t buf[2];
buf[0] = 0x00;
buf[1] = 0x00;
executeOpcodeRead(OP_GET_IRQ_STATUS_8X, buf, 2);
executeOpcode(OP_CLEAR_IRQ_STATUS_8X, buf, 2);
if ((buf[1] & IRQ_PAYLOAD_CRC_ERROR_MASK_8X) == 0) {
return true;
} else {
return false;
}
}
void ISR_VECT sx128x::onDio0Rise() {
BaseType_t int_status = taskENTER_CRITICAL_FROM_ISR();
if (sx128x_modem.getPacketValidity()) { sx128x_modem.handleDio0Rise(); }
// On the SX1280, there is a bug which can cause the busy line
// to remain high if a high amount of packets are received when
// in continuous RX mode. This is documented as Errata 16.1 in
// the SX1280 datasheet v3.2 (page 149)
// Therefore, the modem is set into receive mode each time a packet is received.
sx128x_modem.receive();
taskEXIT_CRITICAL_FROM_ISR(int_status);
}
void sx128x::handleDio0Rise() {
// received a packet
_packetIndex = 0;
uint8_t rxbuf[2] = {0};
executeOpcodeRead(OP_RX_BUFFER_STATUS_8X, rxbuf, 2);
// If implicit header mode is enabled, read packet length as payload length instead.
// See SX1280 datasheet v3.2, page 92
if (_implicitHeaderMode == 0x80) {
_rxPacketLength = _payloadLength;
} else {
_rxPacketLength = rxbuf[0];
_fifo_rx_addr_ptr = rxbuf[1];
readBuffer(_packet, _rxPacketLength);
// On the SX1280, there is a bug which can cause the busy line
// to remain high if a high amount of packets are received when
// in continuous RX mode. This is documented as Errata 16.1 in
// the SX1280 datasheet v3.2 (page 149)
// Therefore, the modem is set into receive mode each time a packet is received.
receive(0);
}
if (_onReceive) { _onReceive(_rxPacketLength); }
if (_onReceive) {
_onReceive(_rxPacketLength);
}
}
@ -209,14 +228,24 @@ uint8_t ISR_VECT sx128x::singleTransfer(uint8_t opcode, uint16_t address, uint8_
return response;
}
void sx128x::rxAntEnable() {
if (_txen != -1) { digitalWrite(_txen, LOW); }
if (_rxen != -1) { digitalWrite(_rxen, HIGH); }
void sx128x::rxAntEnable()
{
if (_txen != -1) {
digitalWrite(_txen, LOW);
}
if (_rxen != -1) {
digitalWrite(_rxen, HIGH);
}
}
void sx128x::txAntEnable() {
if (_txen != -1) { digitalWrite(_txen, HIGH); }
if (_rxen != -1) { digitalWrite(_rxen, LOW); }
void sx128x::txAntEnable()
{
if (_txen != -1) {
digitalWrite(_txen, HIGH);
}
if (_rxen != -1) {
digitalWrite(_rxen, LOW);
}
}
void sx128x::loraMode() {
@ -341,29 +370,23 @@ void sx128x::setPacketParams(uint32_t preamble, uint8_t headermode, uint8_t leng
// because there is no access to these registers on the sx1280, we have
// to set all these parameters at once or not at all.
uint8_t buf[7];
// calculate exponent and mantissa values for modem
// uint8_t e = 1;
// uint8_t m = 1;
// uint32_t preamblelen;
// while (e <= 15) {
// while (m <= 15) {
// preamblelen = m * (pow(2,e));
// if (preamblelen >= preamble) break;
// m++;
// }
// if (preamblelen >= preamble) break;
// m = 0;
// e++;
// }
// Serial.printf("Calculated preamble: %d\r\n", preamblelen);
// Serial.printf("Reg value: %d\r\n", (e << 4) | m);
// TODO: Remove / clean
//buf[0] = (e << 4) | m;
buf[0] = 0x1C;
uint8_t e = 1;
uint8_t m = 1;
uint32_t preamblelen;
while (e <= 15) {
while (m <= 15) {
preamblelen = m * (pow(2,e));
if (preamblelen >= preamble) break;
m++;
}
if (preamblelen >= preamble) break;
m = 0;
e++;
}
buf[0] = (e << 4) | m;
buf[1] = headermode;
buf[2] = length;
buf[3] = crc;
@ -402,7 +425,9 @@ int sx128x::begin(unsigned long frequency)
loraMode();
rxAntEnable();
setFrequency(_frequency);
Serial.printf("Setting freq to %d\r\n", _frequency);
Serial.printf("Should be %d\r\n", frequency);
setFrequency(frequency);
// set LNA boost
// todo: implement this
@ -537,14 +562,6 @@ uint8_t sx128x::packetRssiRaw() {
return buf[0];
}
int ISR_VECT sx128x::packetRssi() {
// may need more calculations here
uint8_t buf[5] = {0};
executeOpcodeRead(OP_PACKET_STATUS_8X, buf, 5);
int pkt_rssi = -buf[0] / 2;
return pkt_rssi;
}
int ISR_VECT sx128x::packetRssi(uint8_t pkt_snr_raw) {
// may need more calculations here
uint8_t buf[5] = {0};
@ -561,7 +578,7 @@ uint8_t ISR_VECT sx128x::packetSnrRaw() {
float ISR_VECT sx128x::packetSnr() {
uint8_t buf[5] = {0};
executeOpcodeRead(OP_PACKET_STATUS_8X, buf, 3);
executeOpcodeRead(OP_PACKET_STATUS_8X, buf, 5);
return float(buf[1]) * 0.25;
}
@ -590,7 +607,10 @@ size_t sx128x::write(const uint8_t *buffer, size_t size)
return size;
}
int ISR_VECT sx128x::available() { return _rxPacketLength - _packetIndex; }
int ISR_VECT sx128x::available()
{
return _rxPacketLength - _packetIndex;
}
int ISR_VECT sx128x::read()
{
@ -598,6 +618,27 @@ int ISR_VECT sx128x::read()
return -1;
}
// if received new packet
if (_packetIndex == 0) {
uint8_t rxbuf[2] = {0};
executeOpcodeRead(OP_RX_BUFFER_STATUS_8X, rxbuf, 2);
int size;
// If implicit header mode is enabled, read packet length as payload length instead.
// See SX1280 datasheet v3.2, page 92
if (_implicitHeaderMode == 0x80) {
size = _payloadLength;
} else {
size = rxbuf[0];
}
_fifo_rx_addr_ptr = rxbuf[1];
if (size > 255) {
size = 255;
}
readBuffer(_packet, size);
}
uint8_t byte = _packet[_packetIndex];
_packetIndex++;
return byte;
@ -650,10 +691,9 @@ void sx128x::onReceive(void(*callback)(int)) {
executeOpcode(OP_SET_IRQ_FLAGS_8X, buf, 8);
#ifdef SPI_HAS_NOTUSINGINTERRUPT
_spiModem->usingInterrupt(digitalPinToInterrupt(_dio0));
SPI.usingInterrupt(digitalPinToInterrupt(_dio0));
#endif
// extern void onDio0Rise();
attachInterrupt(digitalPinToInterrupt(_dio0), onDio0Rise, RISING);
} else {
@ -726,7 +766,7 @@ void sx128x::setPins(int ss, int reset, int dio0, int busy, int rxen, int txen)
void sx128x::setTxPower(int level, int outputPin) {
uint8_t tx_buf[2];
#if BOARD_VARIANT == MODEL_13
#if BOARD_VARIANT == MODEL_13 || BOARD_VARIANT == MODEL_21
// RAK4631 with WisBlock SX1280 module (LIBSYS002)
if (level > 27) {
level = 27;
@ -743,73 +783,73 @@ void sx128x::setTxPower(int level, int outputPin) {
reg_value = -18;
break;
case 1:
reg_value = -17;
reg_value = -16;
break;
case 2:
reg_value = -16;
reg_value = -15;
break;
case 3:
reg_value = -15;
reg_value = -14;
break;
case 4:
reg_value = -14;
reg_value = -13;
break;
case 5:
reg_value = -13;
reg_value = -12;
break;
case 6:
reg_value = -12;
reg_value = -11;
break;
case 7:
reg_value = -10;
reg_value = -9;
break;
case 8:
reg_value = -9;
reg_value = -8;
break;
case 9:
reg_value = -8;
reg_value = -7;
break;
case 10:
reg_value = -7;
reg_value = -6;
break;
case 11:
reg_value = -6;
reg_value = -5;
break;
case 12:
reg_value = -5;
reg_value = -4;
break;
case 13:
reg_value = -4;
reg_value = -3;
break;
case 14:
reg_value = -3;
reg_value = -2;
break;
case 15:
reg_value = -2;
reg_value = -1;
break;
case 16:
reg_value = -1;
reg_value = 0;
break;
case 17:
reg_value = 0;
reg_value = 1;
break;
case 18:
reg_value = 1;
reg_value = 2;
break;
case 19:
reg_value = 2;
reg_value = 3;
break;
case 20:
reg_value = 3;
reg_value = 4;
break;
case 21:
reg_value = 4;
reg_value = 5;
break;
case 22:
reg_value = 5;
reg_value = 6;
break;
case 23:
reg_value = 6;
reg_value = 7;
break;
case 24:
reg_value = 8;
@ -828,17 +868,18 @@ void sx128x::setTxPower(int level, int outputPin) {
break;
}
tx_buf[0] = reg_value;
tx_buf[0] = reg_value + 18;
tx_buf[1] = 0xE0; // ramping time - 20 microseconds
executeOpcode(OP_TX_PARAMS_8X, tx_buf, 2);
#elif BOARD_VARIANT == MODEL_AC
// T3S3 SX1280 PA
#elif BOARD_VARIANT == MODEL_AB
if (level > 20) { level = 20; }
else if (level < 0) { level = 0; }
_txp = level;
int reg_value;
switch (level) {
@ -912,9 +953,8 @@ void sx128x::setTxPower(int level, int outputPin) {
tx_buf[0] = reg_value;
tx_buf[1] = 0xE0; // ramping time - 20 microseconds
// For SX1280 boards with no specific PA requirements
#else
// For SX1280 boards with no specific PA requirements
if (level > 13) {
level = 13;
} else if (level < -18) {
@ -923,7 +963,7 @@ void sx128x::setTxPower(int level, int outputPin) {
_txp = level;
tx_buf[0] = level;
tx_buf[0] = level + 18;
tx_buf[1] = 0xE0; // ramping time - 20 microseconds
#endif
executeOpcode(OP_TX_PARAMS_8X, tx_buf, 2);
@ -977,13 +1017,16 @@ uint32_t sx128x::getSignalBandwidth() {
return 0;
}
void sx128x::handleLowDataRate(){
// todo: do i need this??
void sx128x::handleLowDataRate() { }
}
void sx128x::optimizeModemSensitivity(){
// todo: check if there's anything the sx1280 can do here
void sx128x::optimizeModemSensitivity() { }
}
void sx128x::setSignalBandwidth(uint32_t sbw) {
void sx128x::setSignalBandwidth(uint32_t sbw)
{
if (sbw <= 203.125E3) {
_bw = 0x34;
} else if (sbw <= 406.25E3) {
@ -1018,9 +1061,13 @@ void sx128x::setCodingRate4(int denominator)
setModulationParams(_sf, _bw, _cr);
}
uint8_t sx128x::getCodingRate4() { return _cr + 4; }
uint8_t sx128x::getCodingRate4()
{
return _cr + 4;
}
void sx128x::setPreambleLength(long length) {
void sx128x::setPreambleLength(long length)
{
_preambleLength = length;
setPacketParams(length, _implicitHeaderMode, _payloadLength, _crcMode);
}
@ -1030,21 +1077,21 @@ void sx128x::setSyncWord(int sw)
// not implemented
}
void sx128x::enableCrc()
{
void sx128x::enableCrc() {
_crcMode = 0x20;
setPacketParams(_preambleLength, _implicitHeaderMode, _payloadLength, _crcMode);
}
void sx128x::disableCrc()
{
void sx128x::disableCrc() {
_crcMode = 0;
setPacketParams(_preambleLength, _implicitHeaderMode, _payloadLength, _crcMode);
}
byte sx128x::random()
{
uint8_t sx128x::random() {
// todo: implement
return 0x4; //chosen by fair die roll
//guarenteed to be random
//https://xkcd.com/221/
}
void sx128x::setSPIFrequency(uint32_t frequency)
@ -1075,15 +1122,4 @@ void sx128x::implicitHeaderMode()
setPacketParams(_preambleLength, _implicitHeaderMode, _payloadLength, _crcMode);
}
void sx128x::clearIRQStatus() {
uint8_t buf[2];
buf[0] = 0x00;
buf[1] = 0x00;
executeOpcodeRead(OP_GET_IRQ_STATUS_8X, buf, 2);
executeOpcode(OP_CLEAR_IRQ_STATUS_8X, buf, 2);
}
sx128x sx128x_modem;

1
sx128x.h
Unescape View File

@ -106,6 +106,7 @@ private:
void explicitHeaderMode();
void implicitHeaderMode();
bool getPacketValidity();
void handleDio0Rise();
uint8_t readRegister(uint16_t address);

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