bool RFM69::receiveDone() {
//ATOMIC_BLOCK(ATOMIC_FORCEON)
//{
uint8_t rd_SREG = SREG;
noInterrupts();
// Note: New SPI library prefers to use EIMSK (external interrupt mask) if available
// to mask (only) interrupts registered via SPI::usingInterrupt(). It only
// falls back to disabling ALL interrupts SREG if EIMSK cannot be used.
// Hence We cannot assume that methods calls below that call select() unselect()
// will result in a call to reenable interrupts().
// Thus the code below needs to explicitly do this to be safe.
if (_mode == RF69_MODE_RX && PAYLOADLEN > 0)
{
setMode(RF69_MODE_STANDBY);
SREG = rd_SREG; // restore interrupts
return true;
}
else if (_mode == RF69_MODE_RX) // already in RX no payload yet
{
SREG = rd_SREG; // restore interrupts
return false;
}
receiveBegin();
SREG = rd_SREG; // restore interrupts
return false;
//}
}
bool RFM69::receiveDone() {
// ATOMIC_BLOCK(ATOMIC_FORCEON)
// {
noInterrupts(); //re-enabled in unselect() via setMode() or via receiveBegin()
if (_mode == RF69_MODE_RX && PAYLOADLEN>0)
{
setMode(RF69_MODE_STANDBY); //enables interrupts
return true;
}
else if (_mode == RF69_MODE_RX) //already in RX no payload yet
{
interrupts(); //explicitly re-enable interrupts
return false;
}
receiveBegin();
return false;
//}
}
void RFM69::interruptHandler() {
//pinMode(4, OUTPUT);
//digitalWrite(4, 1);
if (_mode == RF69_MODE_RX && (readReg(REG_IRQFLAGS2) & RF_IRQFLAGS2_PAYLOADREADY))
{
//RSSI = readRSSI();
setMode(RF69_MODE_STANDBY);
select();
SPI.transfer(REG_FIFO & 0x7F);
PAYLOADLEN = SPI.transfer(0);
PAYLOADLEN = PAYLOADLEN > 66 ? 66 : PAYLOADLEN; // precaution
TARGETID = SPI.transfer(0);
if(!(_promiscuousMode || TARGETID == _address || TARGETID == RF69_BROADCAST_ADDR) // match this node's address, or broadcast address or anything in promiscuous mode
|| PAYLOADLEN < 3) // address situation could receive packets that are malformed and don't fit this libraries extra fields
{
PAYLOADLEN = 0;
unselect();
receiveBegin();
//digitalWrite(4, 0);
return;
}
DATALEN = PAYLOADLEN - 3;
SENDERID = SPI.transfer(0);
uint8_t CTLbyte = SPI.transfer(0);
ACK_RECEIVED = CTLbyte & 0x80; // extract ACK-received flag
ACK_REQUESTED = CTLbyte & 0x40; // extract ACK-requested flag
for (uint8_t i = 0; i < DATALEN; i++)
{
DATA[i] = SPI.transfer(0);
}
if (DATALEN < RF69_MAX_DATA_LEN) DATA[DATALEN] = 0; // add null at end of string
unselect();
setMode(RF69_MODE_RX);
}
RSSI = readRSSI();
//digitalWrite(4, 0);
}
// internal function - interrupt gets called when a packet is received
void RFM69::interruptHandler() {
#ifdef RASPBERRY
unsigned char thedata[67];
char i;
for(i = 0; i < 67; i++) thedata[i] = 0;
// printf("interruptHandler %d\n", intCount);
#endif
//pinMode(4, OUTPUT);
//digitalWrite(4, 1);
if (_mode == RF69_MODE_RX && (readReg(REG_IRQFLAGS2) & RF_IRQFLAGS2_PAYLOADREADY))
{
//RSSI = readRSSI();
setMode(RF69_MODE_STANDBY);
#ifdef RASPBERRY
thedata[0] = REG_FIFO & 0x7F;
thedata[1] = 0; // PAYLOADLEN
thedata[2] = 0; // TargetID
wiringPiSPIDataRW(SPI_DEVICE, thedata, 3);
delayMicroseconds(MICROSLEEP_LENGTH);
PAYLOADLEN = thedata[1];
PAYLOADLEN = PAYLOADLEN > 66 ? 66 : PAYLOADLEN; // precaution
TARGETID = thedata[2];
#else
select();
SPI.transfer(REG_FIFO & 0x7F);
PAYLOADLEN = SPI.transfer(0);
PAYLOADLEN = PAYLOADLEN > 66 ? 66 : PAYLOADLEN; // precaution
TARGETID = SPI.transfer(0);
#endif
if(!(_promiscuousMode || TARGETID == _address || TARGETID == RF69_BROADCAST_ADDR) // match this node's address, or broadcast address or anything in promiscuous mode
|| PAYLOADLEN < 3) // address situation could receive packets that are malformed and don't fit this libraries extra fields
{
PAYLOADLEN = 0;
unselect();
receiveBegin();
//digitalWrite(4, 0);
return;
}
#ifdef RASPBERRY
DATALEN = PAYLOADLEN - 3;
thedata[0] = REG_FIFO & 0x77;
thedata[1] = 0; //SENDERID
thedata[2] = 0; //CTLbyte;
for(i = 0; i< DATALEN; i++) {
thedata[i+3] = 0;
}
wiringPiSPIDataRW(SPI_DEVICE, thedata, DATALEN + 3);
SENDERID = thedata[1];
uint8_t CTLbyte = thedata[2];
ACK_RECEIVED = CTLbyte & 0x80; //extract ACK-requested flag
ACK_REQUESTED = CTLbyte & 0x40; //extract ACK-received flag
for (i= 0; i < DATALEN; i++)
{
DATA[i] = thedata[i+3];
}
#else
DATALEN = PAYLOADLEN - 3;
SENDERID = SPI.transfer(0);
uint8_t CTLbyte = SPI.transfer(0);
ACK_RECEIVED = CTLbyte & RFM69_CTL_SENDACK; // extract ACK-received flag
ACK_REQUESTED = CTLbyte & RFM69_CTL_REQACK; // extract ACK-requested flag
interruptHook(CTLbyte); // TWS: hook to derived class interrupt function
for (uint8_t i = 0; i < DATALEN; i++)
{
DATA[i] = SPI.transfer(0);
}
#endif
if (DATALEN < RF69_MAX_DATA_LEN) DATA[DATALEN] = 0; // add null at end of string
unselect();
setMode(RF69_MODE_RX);
}
RSSI = readRSSI();
//digitalWrite(4, 0);
}
