void RFM69::interruptHandler() {
//pinMode(4, OUTPUT);
//digitalWrite(4, 1);
if (_mode == RF69_MODE_RX && (readReg(REG_IRQFLAGS2) & RF_IRQFLAGS2_PAYLOADREADY))
{
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 = 0;
unselect();
//digitalWrite(4, 0);
return;
}
DATALEN = PAYLOADLEN - 3;
SENDERID = SPI.transfer(0);
byte CTLbyte = SPI.transfer(0);
ACK_RECEIVED = CTLbyte & 0x80; //extract ACK-requested flag
ACK_REQUESTED = CTLbyte & 0x40; //extract ACK-received flag
for (byte i= 0; i < DATALEN; i++)
{
DATA[i] = SPI.transfer(0);
}
unselect();
setMode(RF69_MODE_RX);
}
RSSI = readRSSI();
//digitalWrite(4, 0);
}
bool RFM69::canSend()
{
if (_mode == RF69_MODE_RX && PAYLOADLEN == 0 && readRSSI() < CSMA_LIMIT) //if signal stronger than -100dBm is detected assume channel activity
{
setMode(RF69_MODE_STANDBY);
return true;
}
return false;
}
bool RFM69::canSend()
{
// printf("mode %d, payload %d, rssi %d %d\n", _mode, PAYLOADLEN, readRSSI(), CSMA_LIMIT);
if (_mode == RF69_MODE_RX && PAYLOADLEN == 0 && readRSSI() < CSMA_LIMIT) // if signal stronger than -100dBm is detected assume channel activity
{
setMode(RF69_MODE_STANDBY);
return true;
}
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);
}
int rxtx()
{
int s;
// read ptt on PORTD
int c = PIND;
// listen reverse?
if (rv) {
if (c & (1<<REVERSE)) {
lastFreq = 0;
rv = FALSE;
}
}
else {
if (!(c & (1<<REVERSE))) {
lastFreq = 0;
rv = TRUE;
}
}
if (tx) {
//keep smeter clear
s = 0;
// switch from tx to rx??
if (c & (1<<PTT) ) {
cbi(PORTC, TXON);
lastFreq = 0;
tx = FALSE;
}
}
else {
s = readRSSI();
displaySmeter(s);
// switch from rx to tx?
if (!(c & (1<<PTT) )) {
// clear smeter
s = 0;
displaySmeter(s);
sbi(PORTC, MUTE);
sbi(PORTC, TXON);
// force update pll
lastFreq = 0;
tx = TRUE;
}
}
// calc value for ISR
toneCount = 5*F_CPU/tone;
// freq change or update needed?
if (freq != lastFreq) {
long int f = freq;
if (tx) {
f += (long int) shift*1000;
setFrequency(f);
}
else {
if (rv) f += (long int)shift*1000;
setFrequency(f - IF);
}
displayFrequency(f);
lastFreq = freq;
lcdCursor(15,0);
if (tx)
lcdChar('T');
else
lcdChar('R');
}
return s;
}
