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Added DCC api readCVBit and getLocoId

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Sanity check needed
This commit is contained in:
Asbelos
2020-06-03 09:42:17 +01:00
parent 3a8c83afa6
commit 26dffa3be3
2 changed files with 29 additions and 0 deletions
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27
DCC.cpp
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@@ -130,6 +130,13 @@ bool DCC::verifyCVBit(int cv, byte bNum, bool bValue) {
return DCCWaveform::progTrack.schedulePacketWithAck(message, sizeof(message), 5); // NMRA recommends 6 write or reset packets for decoder recovery time
}
int DCC::readCVBit(int cv, byte bNum) {
if (bNum>=8) return -1;
if (verifyCVBit(cv, bNum,true)) return 1;
// failed verify might be a zero, or an error so must check again
if (verifyCVBit(cv, bNum,false)) return 0;
return -1;
}
int DCC::readCV(int cv) {
@@ -164,6 +171,26 @@ void DCC::loop() {
}
}
int DCC::getLocoId() {
switch (readCVBit(29,5)) {
case 1:
// long address : get CV#17 and CV#18
{
int cv17=readCV(17);
if (cv17<0) break;
int cv18=readCV(18);
if (cv18<0) break;
return cv18 + ((cv17 - 192) <<8);
}
case 0: // short address in CV1
return readCV(1);
default: // No response or loco
break;
}
return -1;
}
///// Private helper functions below here /////////////////////
byte DCC::cv1(byte opcode, int cv) {