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ESP32 fix PWM LEDC inverted pin mode

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This commit is contained in:
Harald Barth 2024-04-05 14:05:12 +02:00
parent cff4075937
commit dc5f5e05b9
6 changed files with 71 additions and 25 deletions
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8
DCCTimer.h
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@ -65,10 +65,12 @@ class DCCTimer {
static void startRailcomTimer(byte brakePin);
static void ackRailcomTimer();
static void DCCEXanalogWriteFrequency(uint8_t pin, uint32_t frequency);
static void DCCEXanalogWrite(uint8_t pin, int value);
static void DCCEXanalogWrite(uint8_t pin, int value, bool invert);
static void DCCEXledcDetachPin(uint8_t pin);
static void DCCEXanalogCopyChannel(uint8_t frompin, uint8_t topin);
static void DCCEXInrushControlOn(uint8_t pin, int duty);
static void DCCEXanalogCopyChannel(int8_t frompin, int8_t topin);
static void DCCEXInrushControlOn(uint8_t pin, int duty, bool invert);
static void DCCEXledcAttachPin(uint8_t pin, int8_t channel, bool inverted);
// Update low ram level. Allow for extra bytes to be specified
// by estimation or inspection, that may be used by other
// called subroutines. Must be called with interrupts disabled.

58
DCCTimerESP.cpp
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@ -197,13 +197,48 @@ void DCCTimer::DCCEXledcDetachPin(uint8_t pin) {
pinMatrixOutDetach(pin, false, false);
}
static byte LEDCToMux[] = {
LEDC_HS_SIG_OUT0_IDX,
LEDC_HS_SIG_OUT1_IDX,
LEDC_HS_SIG_OUT2_IDX,
LEDC_HS_SIG_OUT3_IDX,
LEDC_HS_SIG_OUT4_IDX,
LEDC_HS_SIG_OUT5_IDX,
LEDC_HS_SIG_OUT6_IDX,
LEDC_HS_SIG_OUT7_IDX,
LEDC_LS_SIG_OUT0_IDX,
LEDC_LS_SIG_OUT1_IDX,
LEDC_LS_SIG_OUT2_IDX,
LEDC_LS_SIG_OUT3_IDX,
LEDC_LS_SIG_OUT4_IDX,
LEDC_LS_SIG_OUT5_IDX,
LEDC_LS_SIG_OUT6_IDX,
LEDC_LS_SIG_OUT7_IDX,
};
void DCCTimer::DCCEXanalogCopyChannel(uint8_t frompin, uint8_t topin) {
DIAG(F("Pin %d copied to %d channel %d"), frompin, topin, pin_to_channel[frompin]);
pin_to_channel[topin] = pin_to_channel[frompin];
ledcAttachPin(topin, pin_to_channel[topin]);
void DCCTimer::DCCEXledcAttachPin(uint8_t pin, int8_t channel, bool inverted) {
DIAG(F("Attaching pin %d to channel %d %c"), pin, channel, inverted ? 'I' : ' ');
ledcAttachPin(pin, channel);
if (inverted) // we attach again but with inversion
gpio_matrix_out(pin, LEDCToMux[channel], inverted, 0);
}
void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value) {
void DCCTimer::DCCEXanalogCopyChannel(int8_t frompin, int8_t topin) {
// arguments are signed depending on inversion of pins
DIAG(F("Pin %d copied to %d"), frompin, topin);
bool inverted = false;
if (frompin<0)
frompin = -frompin;
if (topin<0) {
inverted = true;
topin = -topin;
}
int channel = pin_to_channel[frompin]; // after abs(frompin)
pin_to_channel[topin] = channel;
DCCTimer::DCCEXledcAttachPin(topin, channel, inverted);
}
void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value, bool invert) {
// This allocates channels 15, 13, 11, ....
// so each channel gets its own timer.
if (pin < SOC_GPIO_PIN_COUNT) {
@ -237,17 +272,20 @@ void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value) {
--cnt_channel; // Now we are at 14, 12, ...
}
ledcSetup(pin_to_channel[pin], 1000, 8);
ledcAttachPin(pin, pin_to_channel[pin]);
DCCEXledcAttachPin(pin, pin_to_channel[pin], invert);
} else {
//DIAG(F("Pin %d assigned to old channel %d"), pin, pin_to_channel[pin]);
ledcAttachPin(pin, pin_to_channel[pin]);
// This else is only here so we can enable diag
// Pin should be already attached to channel
// DIAG(F("Pin %d assigned to old channel %d"), pin, pin_to_channel[pin]);
}
ledcWrite(pin_to_channel[pin], value);
}
}
void DCCTimer::DCCEXInrushControlOn(uint8_t pin, int duty) {
void DCCTimer::DCCEXInrushControlOn(uint8_t pin, int duty, bool inverted) {
// this uses hardcoded channel 0
ledcSetup(0, 62500, 8);
ledcAttachPin(pin, 0);
DCCEXledcAttachPin(pin, 0, inverted);
ledcWrite(0, duty);
}

4
DCCTimerSTM32.cpp
View File

@ -333,7 +333,9 @@ void DCCTimer::DCCEXanalogWriteFrequencyInternal(uint8_t pin, uint32_t frequency
return;
}
void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value) {
void DCCTimer::DCCEXanalogWrite(uint8_t pin, int value, bool invert) {
if (invert)
value = 255-value;
// Calculate percentage duty cycle from value given
uint32_t duty_cycle = (value * 100 / 256) + 1;
if (pin_timer[pin] != NULL) {

14
MotorDriver.cpp
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@ -336,8 +336,6 @@ void MotorDriver::setDCSignal(byte speedcode, uint8_t frequency /*default =0*/)
if (tSpeed <= 1) brake = 255;
else if (tSpeed >= 127) brake = 0;
else brake = 2 * (128-tSpeed);
if (invertBrake)
brake=255-brake;
{ // new block because of variable f
#if defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_STM32)
@ -351,10 +349,10 @@ void MotorDriver::setDCSignal(byte speedcode, uint8_t frequency /*default =0*/)
#endif
//DIAG(F("Brake pin %d freqency %d"), brakePin, f);
DCCTimer::DCCEXanalogWriteFrequency(brakePin, f); // set DC PWM frequency
DCCTimer::DCCEXanalogWrite(brakePin,brake);
DCCTimer::DCCEXanalogWrite(brakePin, brake, invertBrake);
#else // all AVR here
DCCTimer::DCCEXanalogWriteFrequency(brakePin, frequency); // frequency steps
analogWrite(brakePin,brake);
analogWrite(brakePin, invertBrake ? 255-brake : brake);
#endif
}
@ -407,16 +405,16 @@ void MotorDriver::throttleInrush(bool on) {
if ( !(trackMode & (TRACK_MODE_MAIN | TRACK_MODE_PROG | TRACK_MODE_EXT | TRACK_MODE_BOOST)))
return;
byte duty = on ? 207 : 0; // duty of 81% at 62500Hz this gives pauses of 3usec
if (invertBrake)
duty = 255-duty;
#if defined(ARDUINO_ARCH_ESP32)
if(on) {
DCCTimer::DCCEXInrushControlOn(brakePin, duty);
DCCTimer::DCCEXInrushControlOn(brakePin, duty, invertBrake);
} else {
ledcDetachPin(brakePin); // not DCCTimer::DCCEXledcDetachPin() as we have not
// registered the pin in the pin to channel array
}
#elif defined(ARDUINO_ARCH_STM32)
if (invertBrake)
duty = 255-duty;
if(on) {
DCCTimer::DCCEXanalogWriteFrequency(brakePin, 7); // 7 means max
DCCTimer::DCCEXanalogWrite(brakePin,duty);
@ -424,6 +422,8 @@ void MotorDriver::throttleInrush(bool on) {
pinMode(brakePin, OUTPUT);
}
#else // all AVR here
if (invertBrake)
duty = 255-duty;
if(on){
DCCTimer::DCCEXanalogWriteFrequency(brakePin, 7); // 7 means max
}

2
MotorDriver.h
View File

@ -193,7 +193,7 @@ class MotorDriver {
}
};
inline pinpair getSignalPin() { return pinpair(signalPin,signalPin2); };
inline byte getBrakePin() { return brakePin; };
inline int8_t getBrakePinSigned() { return invertBrake ? -brakePin : brakePin; };
void setDCSignal(byte speedByte, uint8_t frequency=0);
void throttleInrush(bool on);
inline void detachDCSignal() {

10
TrackManager.cpp
View File

@ -264,14 +264,18 @@ bool TrackManager::setTrackMode(byte trackToSet, TRACK_MODE mode, int16_t dcAddr
#ifdef ARDUINO_ARCH_ESP32
int trackfound = -1;
FOR_EACH_TRACK(t) {
if ((track[t]->getMode() & TRACK_MODE_DC) && trackDCAddr[t] == dcAddr) {
//DIAG(F("Checking track %c mode %x dcAddr %d"), 'A'+t, track[t]->getMode(), trackDCAddr[t]);
if (t != trackToSet // not our track
&& (track[t]->getMode() & TRACK_MODE_DC) // right mode
&& trackDCAddr[t] == dcAddr) { // right addr
//DIAG(F("Found track %c"), 'A'+t);
trackfound = t;
break;
}
}
if (trackfound > -1) {
DCCTimer::DCCEXanalogCopyChannel(track[trackfound]->getBrakePin(),
track[trackToSet]->getBrakePin());
DCCTimer::DCCEXanalogCopyChannel(track[trackfound]->getBrakePinSigned(),
track[trackToSet]->getBrakePinSigned());
}
#endif
}