/// @details
/// Handles a RFM12 interrupt depending on rxstate and the status reported by the RF
/// module.
static void rf12_interrupt() {
uint8_t in;
state = rf12_xferState(&in);
// data received or byte needed for sending
if (state & RF_FIFO_BIT) {
if (rxstate == TXRECV) { // we are receiving
if (rxfill == 0 && group != 0)
rf12_buf[rxfill++] = group;
rf12_buf[rxfill++] = in;
rf12_crc = _crc16_update(rf12_crc, in);
// do drssi binary-tree search
if ( drssi < 3 && ((rxfill-2)%drssi_bytes_per_decision)==0 ) {// not yet final value
// top nibble when going up, bottom one when going down
drssi = bitRead(state,8)
? (drssi_dec_tree[drssi] & B1111)
: (drssi_dec_tree[drssi] >> 4);
if ( drssi < 3 ) { // not yet final destination, set new threshold
rf12_xfer(RF_RECV_CONTROL | drssi*2+1);
}
}
// check if we got all the bytes (or maximum packet length was reached)
if (fixedLength) {
if (rxfill >= fixedLength || rxfill >= RF_MAX) {
rf12_idle();
}
} else if (rxfill >= rf12_len + 5 || rxfill >= RF_MAX) {
rf12_idle();
}
} else { // we are sending
/// @details
/// Handles a RFM12 interrupt depending on rxstate and the status reported by the RF
/// module.
static void rf12_interrupt() {
uint8_t in;
state = rf12_xferState(&in);
// data received or byte needed for sending
if (state & RF_FIFO_BIT) {
if (rxstate == TXRECV) { // we are receiving
if (rxfill == 0 && group != 0) {
rf12_buf[rxfill++] = group;
#if 0
if (fixedLength) {
rf12_crc8 = 0;
if (((in & 0xF0) == 0xA0) && (fixedLength > 10) && (fixedLengthBase < 10)) {
minLengthCrcOk = 10; // otherwise repeating Fine Offset packages are missed
}
else {
minLengthCrcOk = fixedLengthBase;
}
}
#endif
}
rf12_buf[rxfill++] = in;
if (fixedLength) {
#if 0
if ((rxfill == 2) && ((in & 0xF) >= 4) && ((in & 0xF) <= 5) && ((rf12_buf[1] & 0xF) == 0xA)) {
minLengthCrcOk = fixedLength;
fixedLength = 13 + 1; // ws1600 is longer
}
#endif
rf12_crc8 = _crc8_update(rf12_crc8, in);
}
else {
rf12_crc = _crc16_update(rf12_crc, in);
}
// do drssi binary-tree search
if ( drssi < 3 && ((rxfill-2)%drssi_bytes_per_decision)==0 ) {// not yet final value
// top nibble when going up, bottom one when going down
drssi = bitRead(state,8)
? (drssi_dec_tree[drssi] & B1111)
: (drssi_dec_tree[drssi] >> 4);
if ( drssi < 3 ) { // not yet final destination, set new threshold
rf12_xfer(RF_RECV_CONTROL | drssi*2+1);
}
}
// check if we got all the bytes (or maximum packet length was reached)
if (fixedLength) {
if ((rf12_crc8 == 0) && minLengthCrcOk > 0 && (rxfill >= minLengthCrcOk)) {
rf12_buf[0] = rxfill;
#if 0
while (rxfill < fixedLength) {
rf12_buf[rxfill++] = 0;
}
#endif
rf12_idle();
}
else if (rxfill >= fixedLength || rxfill >= RF_MAX) {
rf12_buf[0] = rxfill;
rf12_idle();
}
} else if (rxfill >= rf12_len + 5 || rxfill >= RF_MAX) {
rf12_idle();
}
} else { // we are sending
