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Dynamic parallel I2S output

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- update NeoPixelBus to v2.8.0
- use single/mono I2S + 4x RMT for 5 outputs or less
- use parallel x8 I2S + 8x RMT for >5 outputs (limit of 300 LEDs per output)
This commit is contained in:
Blaz Kristan
2024-06-12 18:00:00 +02:00
parent 25ade86994
commit f4475b9d2a
10 changed files with 337 additions and 638 deletions
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49
wled00/wled.cpp
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@@ -175,19 +175,44 @@ void WLED::loop()
DEBUG_PRINTLN(F("Re-init busses."));
bool aligned = strip.checkSegmentAlignment(); //see if old segments match old bus(ses)
BusManager::removeAll();
uint32_t mem = 0, globalBufMem = 0;
uint16_t maxlen = 0;
for (uint8_t i = 0; i < WLED_MAX_BUSSES+WLED_MIN_VIRTUAL_BUSSES; i++) {
// determine if it is sensible to use parallel I2S outputs on ESP32 (i.e. more than 5 outputs = 1 I2S + 4 RMT)
bool useParallel = false;
#if defined(ARDUINO_ARCH_ESP32) && !defined(ARDUINO_ARCH_ESP32S2) && !defined(ARDUINO_ARCH_ESP32S3) && !defined(ARDUINO_ARCH_ESP32C3)
unsigned digitalCount = 0;
unsigned maxLeds = 0;
int oldType = 0;
for (unsigned i = 0; i < WLED_MAX_BUSSES+WLED_MIN_VIRTUAL_BUSSES; i++) {
if (busConfigs[i] == nullptr) break;
mem += BusManager::memUsage(*busConfigs[i]);
if (useGlobalLedBuffer && busConfigs[i]->start + busConfigs[i]->count > maxlen) {
maxlen = busConfigs[i]->start + busConfigs[i]->count;
globalBufMem = maxlen * 4;
}
if (mem + globalBufMem <= MAX_LED_MEMORY) {
BusManager::add(*busConfigs[i]);
}
delete busConfigs[i]; busConfigs[i] = nullptr;
if (IS_DIGITAL(busConfigs[i]->type) && !IS_2PIN(busConfigs[i]->type)) digitalCount++;
if (busConfigs[i]->count > maxLeds) maxLeds = busConfigs[i]->count;
// we need to have all LEDs of the same type for parallel
if (i < 8 && oldType > 0 && oldType != busConfigs[i]->type) oldType = -1;
else if (oldType == 0) oldType = busConfigs[i]->type;
}
DEBUG_PRINTF_P(PSTR("Maximum LEDs on a bus: %u\nDigital buses: %u\nDifferent types: %d\n"), maxLeds, digitalCount, (int)(oldType == -1));
// we may remove 300 LEDs per bus limit when NeoPixelBus is updated beyond 2.9.0
if (/*oldType != -1 && */maxLeds <= 300 && digitalCount > 5) {
useParallel = true;
BusManager::useParallelOutput();
DEBUG_PRINTF_P(PSTR("Switching to parallel I2S with max. %d LEDs per ouptut.\n"), maxLeds);
}
#endif
// create buses/outputs
unsigned mem = 0;
for (unsigned i = 0; i < WLED_MAX_BUSSES+WLED_MIN_VIRTUAL_BUSSES; i++) {
if (busConfigs[i] == nullptr || (!useParallel && i > 10)) break;
if (useParallel && i < 8) {
// we are using parallel I2S and memUsage() will include x8 allocation into account
if (i == 0)
mem = BusManager::memUsage(*busConfigs[i]); // includes x8 memory allocation for parallel I2S
else
if (BusManager::memUsage(*busConfigs[i]) > mem)
mem = BusManager::memUsage(*busConfigs[i]); // if we have unequal LED count use the largest
} else
mem += BusManager::memUsage(*busConfigs[i]); // includes global buffer
if (mem <= MAX_LED_MEMORY) BusManager::add(*busConfigs[i]);
delete busConfigs[i];
busConfigs[i] = nullptr;
}
strip.finalizeInit(); // also loads default ledmap if present
if (aligned) strip.makeAutoSegments();