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found a better way of deadTime subtraction, fixed inverted signals

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Damian Schneider 2024-09-04 18:03:52 +02:00
parent b1e58dd10d
commit d3c31c52a2
1 changed files with 6 additions and 4 deletions
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10
wled00/bus_manager.cpp
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@ -546,18 +546,20 @@ void BusPwm::show() {
// Phase shifting requires that LEDC timers are synchronised (see setup()). For PWM CCT (and H-bridge) it is
// also mandatory that both channels use the same timer (pinManager takes care of that).
for (unsigned i = 0; i < numPins; i++) {
unsigned duty = (_data[i] * pwmBri) / 255;
if (_reversed) duty = maxBri - duty;
unsigned duty = (_data[i] * pwmBri) / 255;
#ifdef ESP8266
if (_reversed) duty = maxBri - duty;
analogWrite(_pins[i], duty);
#else
unsigned deadTime = 0;
if (_type == TYPE_ANALOG_2CH && Bus::getCCTBlend() == 0) {
// add dead time between signals (when using dithering, two full 8bit pulses are required)
deadTime = (1+dithering) << bitShift;
// we only need to take care of shortening the signal at (almost) full brightness otherwise pulses may overflow hPoint
if (_bri >= 254 && duty + deadTime + hPoint >= maxBri) duty = maxBri - hPoint - deadTime; // shorten duty if overflowing
// we only need to take care of shortening the signal at (almost) full brightness otherwise pulses may overlap
if (_bri >= 254 && duty >= maxBri / 2 && duty < maxBri) duty -= deadTime << 1; // shorten duty of larger signal except if full on
if(_reversed) deadTime = -deadTime; // need to invert dead time to make phaseshift go the opposite way so low signals dont overlap
}
if (_reversed) duty = maxBri - duty;
unsigned channel = _ledcStart + i;
unsigned gr = channel/8; // high/low speed group
unsigned ch = channel%8; // group channel