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Explain better and change naming but same functionality

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This commit is contained in:
Harald Barth 2022-05-22 22:43:06 +02:00
parent 867e3b3930
commit 17fb921678
1 changed files with 12 additions and 7 deletions
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19
DCC.cpp
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@ -229,23 +229,28 @@ uint32_t DCC::getFunctionMap(int cab) {
return (reg<0)?0:speedTable[reg].functions;
}
void DCC::setAccessory(int address, byte number, bool activate) {
void DCC::setAccessory(int address, byte port, bool gate) {
// An accessory has an address, 4 ports and 2 gates (coils) each. That's how
// the initial decoders were orgnized and that influenced how the DCC
// standard was made.
#ifdef DIAG_IO
DIAG(F("DCC::setAccessory(%d,%d,%d)"), address, number, activate);
DIAG(F("DCC::setAccessory(%d,%d,%d)"), address, port, gate);
#endif
// use masks to detect wrong values and do nothing
if(address != (address & 511))
return;
if(number != (number & 3))
if(port != (port & 3))
return;
byte b[2];
b[0] = address % 64 + 128; // first byte is of the form 10AAAAAA, where AAAAAA represent 6 least signifcant bits of accessory address
b[1] = ((((address / 64) % 8) << 4) + (number % 4 << 1) + activate % 2) ^ 0xF8; // second byte is of the form 1AAACDDD, where C should be 1, and the least significant D represent activate/deactivate
// first byte is of the form 10AAAAAA, where AAAAAA represent 6 least signifcant bits of accessory address
// second byte is of the form 1AAACPPG, where C should be 1, PP the ports and G the gate
b[0] = address % 64 + 128;
b[1] = ((((address / 64) % 8) << 4) + (port % 4 << 1) + gate % 2) ^ 0xF8;
DCCWaveform::mainTrack.schedulePacket(b, 2, 4); // Repeat the packet four times
DCCWaveform::mainTrack.schedulePacket(b, 2, 3); // Repeat the packet three times
#if defined(EXRAIL_ACTIVE)
RMFT2::activateEvent(address<<2|number,activate);
RMFT2::activateEvent(address<<2|port,gate);
#endif
}