From 764380ae5791d04375cc4db9f9cf9665176c4c4c Mon Sep 17 00:00:00 2001
From: travis-farmer <travis.farmer@outlook.com>
Date: Sun, 29 Dec 2024 06:02:06 -0500
Subject: [PATCH] save current, works for now

---
 IO_EXIO485.cpp | 21 +++++++++++++++++----
 IO_EXIO485.h   | 15 +++++++++------
 2 files changed, 26 insertions(+), 10 deletions(-)

diff --git a/IO_EXIO485.cpp b/IO_EXIO485.cpp
index 0c0b4ac..21eff9f 100644
--- a/IO_EXIO485.cpp
+++ b/IO_EXIO485.cpp
@@ -30,13 +30,13 @@ static const byte PAYLOAD_STRING = 2;
  ************************************************************/
 
 // Constructor for EXIO485
-EXIO485::EXIO485(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin, int cycleTime) {
+EXIO485::EXIO485(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin) {
   _serial = &serial;
   _baud = baud;
   
   _txPin = txPin;
   _busNo = busNo;
-  _cycleTime = cycleTime * 1000UL;
+  _retryTime = 1000000UL; // 1 second
   bufferLength=0;
   inCommandPayload=PAYLOAD_FALSE;
   // Add device to HAL device chain
@@ -89,10 +89,21 @@ void EXIO485::_loop(unsigned long currentMicros) {
   }
   
   if ( hasTasks()){ // do we have any tasks on the docket
-    _cycleStartTimeA = _currentMicros;
+    
     if (CurrentTaskID == -1) CurrentTaskID = getNextTaskId();
-
     Task* currentTask = getTaskById(CurrentTaskID);
+    if (currentTask == nullptr) return; // dead task
+
+    if (!currentTask->completed && _currentMicros - _cycleStartTimeA >= _retryTime) { // after CRC pass, timer is reset
+      
+      if (currentTask->currentRetryTimer == 0UL) { // first trigger
+        currentTask->currentRetryTimer = _currentMicros; // set timer
+      } else if (_currentMicros - currentTask->currentRetryTimer >= _retryTime) {
+        currentTask->currentRetryTimer = _currentMicros; // reset timer
+        currentTask->rxMode = false; // resend data
+        DIAG(F("EX-IOExplorer485: Fail RX, Retry TX. Task: %d"), CurrentTaskID);
+      }
+    }
 
     if (!currentTask->rxMode) {
       currentTask->crcPassFail = 0;
@@ -167,6 +178,7 @@ void EXIO485::_loop(unsigned long currentMicros) {
         int nodeTo = received_data[0];
         if (nodeTo == 0) { // for master.
           flagProc = true;
+          
         }
       }
       
@@ -258,6 +270,7 @@ void EXIO485::_loop(unsigned long currentMicros) {
             break;
           }
         }
+        _cycleStartTimeA = currentMicros; // reset timer so we do not resend data
       }
     }
   }
diff --git a/IO_EXIO485.h b/IO_EXIO485.h
index b635fb9..52b1f09 100644
--- a/IO_EXIO485.h
+++ b/IO_EXIO485.h
@@ -371,7 +371,7 @@ private:
   unsigned long _cycleStartTime = 0;
   unsigned long _cycleStartTimeA = 0;
   unsigned long _timeoutStart = 0;
-  unsigned long _cycleTime; // target time between successive read/write cycles, microseconds
+  unsigned long _retryTime; // target time between successive read/write cycles, microseconds
   unsigned long _timeoutPeriod; // timeout on read responses, in microseconds.
   unsigned long _currentMicros;  // last value of micros() from _loop function.
   unsigned long _postDelay; // delay time after transmission before switching off transmitter (in us)
@@ -418,12 +418,13 @@ struct Task {
     int crcPassFail;
     bool completed;
     bool processed;
+    unsigned long currentRetryTimer;
   };
-  static const int MAX_TASKS = 1000;
+  static const int MAX_TASKS = 100; // we don't want to run out of task slots, but memory?
   long taskIDCntr = 1;
   long CurrentTaskID = -1;
   int taskResendCount = 0;
-  Task taskBuffer[MAX_TASKS]; // Buffer to hold up to 100 tasks
+  Task taskBuffer[MAX_TASKS];
   int currentTaskIndex = 0;
 
   void addTask(const uint8_t* cmd, int byteCount, uint8_t retFlag) {
@@ -448,6 +449,7 @@ struct Task {
     taskBuffer[emptySlot].gotCallback = false;
     taskBuffer[emptySlot].completed = false;
     taskBuffer[emptySlot].processed = false;
+    taskBuffer[emptySlot].currentRetryTimer = 0UL;
     taskIDCntr++;
     if (taskIDCntr >= 5000000) taskIDCntr = 1;
     taskBuffer[emptySlot].taskID = taskIDCntr;
@@ -485,6 +487,7 @@ struct Task {
       if (taskBuffer[i].taskID == id) {
         taskBuffer[i].completed = true; // completed
         taskBuffer[i].taskID = -1; // unassigned
+        taskBuffer[i].currentRetryTimer = 0UL; // stop timer
         CurrentTaskID = getNextTaskId();
         break;
       }
@@ -520,8 +523,8 @@ struct Task {
     EXIOWRAN = 0xEA,   // Flag we're sending an analogue write (PWM)
     EXIOERR = 0xEF,     // Flag we've received an error
   };
-  static void create(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin=-1, int cycleTime=500) {
-    new EXIO485(busNo, serial, baud, txPin, cycleTime);
+  static void create(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin=-1) {
+    new EXIO485(busNo, serial, baud, txPin);
   }
   HardwareSerial* _serial;
   int _CommMode = 0;
@@ -599,7 +602,7 @@ struct Task {
   }
 
 protected:
-  EXIO485(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin, int cycleTime);
+  EXIO485(uint8_t busNo, HardwareSerial &serial, unsigned long baud, int8_t txPin);
 
 public: