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disable SPC optimizations when busses overlap

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support for "custom bus indices" that lead to overlaping output pixel ranges
This commit is contained in:
Frank
2026-01-12 18:55:27 +01:00
parent 75fe5b747c
commit eaec389ef4
2 changed files with 33 additions and 4 deletions
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32
wled00/bus_manager.cpp
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@@ -1272,7 +1272,6 @@ int BusManager::add(BusConfig &bc) {
lastlen = 0;
laststart = 0;
lastBus = nullptr;
slowMode = false;
DEBUG_PRINTF("BusManager::add(bc.type=%u)\n", bc.type);
if (bc.type >= TYPE_NET_DDP_RGB && bc.type < 96) {
@@ -1293,6 +1292,34 @@ int BusManager::add(BusConfig &bc) {
} else {
busses[numBusses] = new BusPwm(bc);
}
// WLEDMM ToDO
Bus *newBus = busses[numBusses];
unsigned newStart = newBus->getStart();
unsigned newEnd = newStart + newBus->getLength() - 1;
// WLEDMM check if added bus overlaps with any existing bus
bool foundOverlap = false;
unsigned busCount = getNumBusses();
if (newBus != nullptr && newBus->isOk()) {
for (unsigned i=0; i<busCount; i++) {
if (i == numBusses) continue; // skip self - should not happen
Bus *theBus = getBus(i);
if (theBus == nullptr) continue;
if (!theBus->isOk()) continue;
// check for overlap
unsigned theStart = theBus->getStart();
unsigned theEnd = theStart + theBus->getLength() - 1;
// see https://stackoverflow.com/questions/3269434/whats-the-most-efficient-way-to-test-if-two-ranges-overlap
if ((newStart <= theEnd) && (theStart <= newEnd)) { // catches all overlap scenarios - including "new is including (around) another range"
foundOverlap = true;
USER_PRINTF("bus %u[%u %u] overlaps with\t%u [%u %u]", numBusses, newStart, newEnd, i, theStart, theEnd);
}
}
}
// if some busses overlap, we disable the bus caching optimization to allow multiple outputs for the same pixel
if (foundOverlap) { overlapingBusses = true; slowMode = true; }
if (numBusses < 1) { overlapingBusses = false; slowMode = false; }
USER_PRINT(slowMode ? "busses are in SlowMode\n" : "");
return numBusses++;
}
@@ -1312,6 +1339,7 @@ void BusManager::removeAll() {
laststart = 0;
lastlen = 0;
slowMode = false;
overlapingBusses = false;
}
void __attribute__((hot)) BusManager::show() {
@@ -1431,7 +1459,7 @@ uint32_t IRAM_ATTR __attribute__((hot)) BusManager::getPixelColorRestored(uint_
bool BusManager::canAllShow() const {
for (uint8_t i = 0; i < numBusses; i++) {
if (!busses[i]->canShow()) return false;
if ((busses[i]->isOk()) && !busses[i]->canShow()) return false;
}
return true;
}