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Introduce asynchronous reception and transmission for CC1101

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This commit is contained in:
OBones 2022-02-28 17:27:29 +01:00
parent 70acd5b9aa
commit fa1811fe73
2 changed files with 65 additions and 0 deletions
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48
src/modules/CC1101/CC1101.cpp
View file

@ -208,6 +208,41 @@ int16_t CC1101::receiveDirect() {
return(RADIOLIB_ERR_NONE);
}
int16_t CC1101::transmitDirectAsync(uint32_t frf) {
// set RF switch (if present)
_mod->setRfSwitchState(LOW, HIGH);
// user requested to start transmitting immediately (required for RTTY)
if(frf != 0) {
SPIwriteRegister(RADIOLIB_CC1101_REG_FREQ2, (frf & 0xFF0000) >> 16);
SPIwriteRegister(RADIOLIB_CC1101_REG_FREQ1, (frf & 0x00FF00) >> 8);
SPIwriteRegister(RADIOLIB_CC1101_REG_FREQ0, frf & 0x0000FF);
SPIsendCommand(RADIOLIB_CC1101_CMD_TX);
}
// activate asynchronous direct mode
int16_t state = asyncDirectMode();
RADIOLIB_ASSERT(state);
// start transmitting
SPIsendCommand(RADIOLIB_CC1101_CMD_TX);
return(state);
}
int16_t CC1101::receiveDirectAsync() {
// set RF switch (if present)
_mod->setRfSwitchState(HIGH, LOW);
// activate asynchronous direct mode
int16_t state = asyncDirectMode();
RADIOLIB_ASSERT(state);
// start receiving
SPIsendCommand(RADIOLIB_CC1101_CMD_RX);
return(ERR_NONE);
}
int16_t CC1101::packetMode() {
int16_t state = SPIsetRegValue(RADIOLIB_CC1101_REG_PKTCTRL1, RADIOLIB_CC1101_CRC_AUTOFLUSH_OFF | RADIOLIB_CC1101_APPEND_STATUS_ON | RADIOLIB_CC1101_ADR_CHK_NONE, 3, 0);
state |= SPIsetRegValue(RADIOLIB_CC1101_REG_PKTCTRL0, RADIOLIB_CC1101_WHITE_DATA_OFF | RADIOLIB_CC1101_PKT_FORMAT_NORMAL, 6, 4);
@ -902,6 +937,19 @@ int16_t CC1101::directMode() {
return(state);
}
int16_t CC1101::asyncDirectMode() {
// set mode to standby
SPIsendCommand(RADIOLIB_CC1101_CMD_IDLE);
// set GDO0 mapping
int16_t state = SPIsetRegValue(RADIOLIB_CC1101_REG_IOCFG0, RADIOLIB_CC1101_GDOX_SERIAL_DATA_ASYNC , 5, 0);
// set asynchronous continuous mode
state |= SPIsetRegValue(RADIOLIB_CC1101_REG_PKTCTRL0, RADIOLIB_CC1101_PKT_FORMAT_ASYNCHRONOUS, 5, 4);
state |= SPIsetRegValue(RADIOLIB_CC1101_REG_PKTCTRL0, RADIOLIB_CC1101_LENGTH_CONFIG_INFINITE, 1, 0);
return(state);
}
void CC1101::getExpMant(float target, uint16_t mantOffset, uint8_t divExp, uint8_t expMax, uint8_t& exp, uint8_t& mant) {
// get table origin point (exp = 0, mant = 0)
float origin = (mantOffset * RADIOLIB_CC1101_CRYSTAL_FREQ * 1000000.0)/((uint32_t)1 << divExp);

17
src/modules/CC1101/CC1101.h
View file

@ -591,6 +591,22 @@ class CC1101: public PhysicalLayer {
*/
int16_t receiveDirect() override;
/*!
\brief Starts asynchronous direct mode transmission.
\param frf Raw RF frequency value. Defaults to 0, required for quick frequency shifts in RTTY.
\returns \ref status_codes
*/
int16_t transmitDirectAsync(uint32_t frf = 0);
/*!
\brief Starts asynchronous direct mode reception.
\returns \ref status_codes
*/
int16_t receiveDirectAsync();
/*!
\brief Stops direct mode. It is required to call this method to switch from direct transmissions to packet-based transmissions.
*/
@ -953,6 +969,7 @@ class CC1101: public PhysicalLayer {
int16_t config();
int16_t directMode();
int16_t asyncDirectMode();
static void getExpMant(float target, uint16_t mantOffset, uint8_t divExp, uint8_t expMax, uint8_t& exp, uint8_t& mant);
int16_t setPacketMode(uint8_t mode, uint16_t len);
};