DCCTimer.h

@@ -105,14 +105,9 @@ private:
 // that an offset can be initialized.
 class ADCee {
 public:
-  // begin is called for any setup that must be done before
-  // **init** can be called. On some architectures this involves ADC
-  // initialisation and clock routing, sampling times etc.
-  static void begin();
-  // init adds the pin to the list of scanned pins (if this
+  // init does add the pin to the list of scanned pins (if this
   // platform's implementation scans pins) and returns the first
-  // read value (which is why it required begin to have been called first!)
-  // It must be called before the regular scan is started.
+  // read value. It is called before the regular scan is started.
   static int init(uint8_t pin);
   // read does read the pin value from the scanned cache or directly
   // if this is a platform that does not scan. fromISR is a hint if
@@ -121,15 +116,19 @@ public:
   static int read(uint8_t pin, bool fromISR=false);
   // returns possible max value that the ADC can return
   static int16_t ADCmax();
+  // begin is called for any setup that must be done before
+  // scan can be called.
+  static void begin();
 private:
   // On platforms that scan, it is called from waveform ISR
   // only on a regular basis.
   static void scan();
   // bit array of used pins (max 16)
   static uint16_t usedpins;
-  static uint8_t highestPin;
   // cached analog values (malloc:ed to actual number of ADC channels)
   static int *analogvals;
+  // ids to scan (new way)
+  static byte *idarr;
   // friend so that we can call scan() and begin()
   friend class DCCWaveform;
   };

DCCTimerAVR.cpp

@@ -1,6 +1,6 @@
 /*
  *  © 2021 Mike S
- *  © 2021-2023 Harald Barth
+ *  © 2021-2022 Harald Barth
  *  © 2021 Fred Decker
  *  © 2021 Chris Harlow
  *  © 2021 David Cutting
@@ -29,9 +29,6 @@
 #include <avr/boot.h> 
 #include <avr/wdt.h>
 #include "DCCTimer.h"
-#ifdef DEBUG_ADC
-#include "TrackManager.h"
-#endif
 INTERRUPT_CALLBACK interruptHandler=0;
 
   // Arduino nano, uno, mega etc
@@ -131,8 +128,8 @@ void DCCTimer::reset() {
 #define NUM_ADC_INPUTS 8
 #endif
 uint16_t ADCee::usedpins = 0;
-uint8_t ADCee::highestPin = 0;
 int * ADCee::analogvals = NULL;
+byte *ADCee::idarr = NULL;
 static bool ADCusesHighPort = false;
 
 /*
@@ -142,17 +139,28 @@ static bool ADCusesHighPort = false;
  */
 int ADCee::init(uint8_t pin) {
   uint8_t id = pin - A0;
+  byte n;
   if (id >= NUM_ADC_INPUTS)
     return -1023;
   if (id > 7)
     ADCusesHighPort = true;
   pinMode(pin, INPUT);
   int value = analogRead(pin);
-  if (analogvals == NULL)
+  if (analogvals == NULL) {
     analogvals = (int *)calloc(NUM_ADC_INPUTS, sizeof(int));
-  analogvals[id] = value;
-  usedpins |= (1<<id);
-  if (id > highestPin) highestPin = id;
+    for (n=0 ; n < NUM_ADC_INPUTS; n++) // set unreasonable value at startup as marker
+      analogvals[n] = -32768;           // 16 bit int min value
+    idarr = (byte *)calloc(NUM_ADC_INPUTS+1, sizeof(byte));  // +1 for terminator value
+    for (n=0 ; n <= NUM_ADC_INPUTS; n++)
+      idarr[n] = 255;                   // set 255 as end of array marker
+  }
+  analogvals[id] = value; // store before enable by idarr[n]
+  for (n=0 ; n <= NUM_ADC_INPUTS; n++) {
+    if (idarr[n] == 255) {
+      idarr[n] = id;
+      break;
+    }
+  }
   return value;
 }
 int16_t ADCee::ADCmax() {
@@ -162,14 +170,14 @@ int16_t ADCee::ADCmax() {
  * Read function ADCee::read(pin) to get value instead of analogRead(pin)
  */
 int ADCee::read(uint8_t pin, bool fromISR) {
+  (void)fromISR; // AVR does ignore this arg
   uint8_t id = pin - A0;
-  if ((usedpins & (1<<id) ) == 0)
-    return -1023;
+  int a;
   // we do not need to check (analogvals == NULL)
   // because usedpins would still be 0 in that case
-  if (!fromISR) noInterrupts();
-  int a = analogvals[id];
-  if (!fromISR) interrupts();
+  noInterrupts();
+  a = analogvals[id];
+  interrupts();
   return a;
 }
 /*
@@ -178,8 +186,7 @@ int ADCee::read(uint8_t pin, bool fromISR) {
 #pragma GCC push_options
 #pragma GCC optimize ("-O3")
 void ADCee::scan() {
-  static byte id = 0;       // id and mask are the same thing but it is faster to
-  static uint16_t mask = 1; // increment and shift instead to calculate mask from id
+  static byte num = 0;       // index into id array
   static bool waiting = false;
 
   if (waiting) {
@@ -191,49 +198,26 @@ void ADCee::scan() {
     low = ADCL; //must read low before high
     high = ADCH;
     bitSet(ADCSRA, ADIF);
-    analogvals[id] = (high << 8) | low;
-    // advance at least one track
-#ifdef DEBUG_ADC
-    if (id == 1) TrackManager::track[1]->setBrake(0);
-#endif
+    analogvals[idarr[num]] = (high << 8) | low;
     waiting = false;
-    id++;
-    mask = mask << 1;
-    if (id > highestPin) { // the 1 has been shifted out
-      id = 0;
-      mask = 1;
-    }
   }
   if (!waiting) {
-    if (usedpins == 0) // otherwise we would loop forever
-      return;
-    // look for a valid track to sample or until we are around
-    while (true) {
-      if (mask  & usedpins) {
+    // cycle around in-use analogue pins
+    num++;
+    if (idarr[num] == 255)
+      num = 0;
     // start new ADC aquire on id
 #if defined(ADCSRB) && defined(MUX5)
     if (ADCusesHighPort) {     // if we ever have started to use high pins)
-	  if (id > 7)          // if we use a high ADC pin
+      if (idarr[num] > 7)              // if we use a high ADC pin
 	bitSet(ADCSRB, MUX5);  // set MUX5 bit
       else
 	bitClear(ADCSRB, MUX5);
     }
 #endif
-	ADMUX=(1<<REFS0)|(id & 0x07); //select AVCC as reference and set MUX
+    ADMUX = (1 << REFS0) | (idarr[num] & 0x07); // select AVCC as reference and set MUX
     bitSet(ADCSRA, ADSC);               // start conversion
-#ifdef DEBUG_ADC
-	if (id == 1) TrackManager::track[1]->setBrake(1);
-#endif
     waiting = true;
-	return;
-      }
-      id++;
-      mask = mask << 1;
-      if (id > highestPin) {
-	id = 0;
-	mask = 1;
-      }
-    }
   }
 }
 #pragma GCC pop_options

DCCTimerSTM32.cpp

@@ -30,10 +30,6 @@
 #ifdef ARDUINO_ARCH_STM32
 
 #include "DCCTimer.h"
-#ifdef DEBUG_ADC
-#include "TrackManager.h"
-#endif
-#include "DIAG.h"
 
 #if defined(ARDUINO_NUCLEO_F411RE)
 // Nucleo-64 boards don't have Serial1 defined by default
@@ -311,8 +307,6 @@ int ADCee::init(uint8_t pin) {
   analogchans[id] = adcchan;  // Keep track of which ADC channel is used for reading this pin
   usedpins |= (1 << id);      // This pin is now ready
 
-  DIAG(F("ADCee::init(): value=%d, channel=%d, id=%d"), value, adcchan, id);
-
   return value;
 }
 
@@ -346,13 +340,11 @@ void ADCee::scan() {
     // found value
     analogvals[id] = ADC1->DR;
     // advance at least one track
-#ifdef DEBUG_ADC
-    if (id == 1) TrackManager::track[1]->setBrake(0);
-#endif
+    // for scope debug TrackManager::track[1]->setBrake(0);
     waiting = false;
     id++;
     mask = mask << 1;
-    if (mask == 0) { // the 1 has been shifted out
+    if (id == NUM_ADC_INPUTS+1) {
       id = 0;
       mask = 1;
     }
@@ -366,15 +358,13 @@ void ADCee::scan() {
     	  // start new ADC aquire on id
         ADC1->SQR3 = analogchans[id]; //1st conversion in regular sequence
         ADC1->CR2 |= (1 << 30); //Start 1st conversion SWSTART
-#ifdef DEBUG_ADC
-	if (id == 1) TrackManager::track[1]->setBrake(1);
-#endif
+	      // for scope debug TrackManager::track[1]->setBrake(1);
 	      waiting = true;
 	      return;
       }
       id++;
       mask = mask << 1;
-      if (mask == 0) { // the 1 has been shifted out
+      if (id == NUM_ADC_INPUTS+1) {
 	      id = 0;
 	      mask = 1;
       }

GITHUB_SHA.h

@@ -1 +1 @@
-#define GITHUB_SHA "devel-202306182208Z"
+#define GITHUB_SHA "devel-202306031954Z"

MotorDriver.cpp

@@ -108,13 +108,8 @@ MotorDriver::MotorDriver(int16_t power_pin, byte signal_pin, byte signal_pin2, i
   }
   
   currentPin=current_pin;
-  if (currentPin!=UNUSED_PIN) {
-    int ret = ADCee::init(currentPin);
-    if (ret < -1010) { // XXX give value a name later
-      DIAG(F("ADCee::init error %d, disable current pin %d"), ret, currentPin);
-      currentPin = UNUSED_PIN;
-    }
-  }
+  if (currentPin!=UNUSED_PIN)
+    ADCee::init(currentPin);
   senseOffset=0; // value can not be obtained until waveform is activated
 
   if (fault_pin != UNUSED_PIN) {

TrackManager.h

@@ -86,13 +86,6 @@ class TrackManager {
     static bool progTrackSyncMain;  // true when prog track is a siding switched to main
      static bool progTrackBoosted;   // true when prog track is not current limited
     
-#ifdef DEBUG_ADC
-  public:
-#else
-  private:
-#endif
-    static MotorDriver* track[MAX_TRACKS];
-
   private:
     static void addTrack(byte t, MotorDriver* driver);
     static byte lastTrack;
@@ -100,6 +93,7 @@ class TrackManager {
     static POWERMODE mainPowerGuess;
     static void applyDCSpeed(byte t);
 
+    static MotorDriver* track[MAX_TRACKS];
     static TRACK_MODE trackMode[MAX_TRACKS]; 
     static int16_t trackDCAddr[MAX_TRACKS];  // dc address if TRACK_MODE_DC or TRACK_MODE_DCX
 #ifdef ARDUINO_ARCH_ESP32

version.h

@@ -4,8 +4,7 @@
 #include "StringFormatter.h"
 
 
-#define VERSION "4.2.55"
-// 4.2.55 - Optimize analog read for AVR
+#define VERSION "4.2.54"
 // 4.2.54 - EX8874 shield in config.example.h
 //        - Fix: Better warnings for pin number errors
 //        - Fix: Default roster list possible in Withrottle and <jR>