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accessory packet issues.

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This commit is contained in:
Asbelos 2024-02-17 11:09:03 +00:00
parent 7e4093f03f
commit dcd332603c
3 changed files with 36 additions and 23 deletions
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40
DCC.cpp
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@ -278,21 +278,39 @@ void DCC::setAccessory(int address, byte port, bool gate, byte onoff /*= 2*/) {
}
}
void DCC::setExtendedAccessory(int16_t address, int16_t value, byte repeats) {
bool DCC::setExtendedAccessory(int16_t address, int16_t value, byte repeats) {
/* From https://www.nmra.org/sites/default/files/s-9.2.1_2012_07.pdf
The Extended Accessory Decoder Control Packet is included for the purpose of transmitting aspect control to signal
decoders or data bytes to more complex accessory decoders. Each signal head can display one aspect at a time.
{preamble} 0 10AAAAAA 0 0AAA0AA1 0 000XXXXX 0 EEEEEEEE 1
XXXXX is for a single head. A value of 00000 for XXXXX indicates the absolute stop aspect. All other aspects
represented by the values for XXXXX are determined by the signaling system used and the prototype being
modeled.
*/
/* CAH Notes:
Thus in byte packet form the format is 10AAAAAA, 0AAA0AA1, 000XXXXX
Note that the Basic accessory format mentions
"By convention these bits (bits 4-6 of the second data byte) are in ones complement"
but this note is absent from the advanced packet description.
The (~address) construct below applies this because this appears to be
required.
*/
if (address != (address & 0x7FF)) return false; // 11 bits
if (value != (value & 0x1F)) return false; // 5 bits
// format is 10AAAAAA, 0AAA0AA1, 000XXXXX
if (address != (address & 0x7F)) return;
if (value != (value & 0x1F)) return;
byte b[3];
b[0]= 0x80 | ((address & 0x7FF)>>5);
b[1]= 0x01 | ((address & 0x1c)<<2) | (address & 0x03)<<1;
b[2]=value & 0x1F;
b[0]= 0x80 | (address>>5);
b[1]= 0x01 | (((~address) & 0x1c)<<2) | ((address & 0x03)<<1);
b[2]=value;
DCCWaveform::mainTrack.schedulePacket(b, sizeof(b), repeats); // Repeat on packet three times
#if defined(EXRAIL_ACTIVE)
// TODO RMFT2::activateExtendedEvent(address,value);
#endif
}
return true;
}
//
// writeCVByteMain: Write a byte with PoM on main. This writes

2
DCC.h
View File

@ -71,7 +71,7 @@ public:
static uint32_t getFunctionMap(int cab);
static void updateGroupflags(byte &flags, int16_t functionNumber);
static void setAccessory(int address, byte port, bool gate, byte onoff = 2);
static void setExtendedAccessory(int16_t address, int16_t value, byte repeats=3);
static bool setExtendedAccessory(int16_t address, int16_t value, byte repeats=3);
static bool writeTextPacket(byte *b, int nBytes);
// ACKable progtrack calls bitresults callback 0,0 or -1, cv returns value or -1

15
DCCEXParser.cpp
View File

@ -386,16 +386,11 @@ void DCCEXParser::parseOne(Print *stream, byte *com, RingStream * ringStream)
return;
case 'A': // EXTENDED ACCESSORY <A address value>
{
// Note: if this happens to match a defined EXRAIL
// DCCX_SIGNAL, then EXRAIL will have intercepted
// this command alrerady.
if (params!=2) break;
if (p[0] != (p[0] & 0x7F)) break;
if (p[1] != (p[1] & 0x1F)) break;
DCC::setExtendedAccessory(p[0],p[1]);
}
return;
// Note: if this happens to match a defined EXRAIL
// DCCX_SIGNAL, then EXRAIL will have intercepted
// this command alrerady.
if (params==2 && DCC::setExtendedAccessory(p[0],p[1])) return;
break;
case 'T': // TURNOUT <T ...>
if (parseT(stream, params, p))