states adjusted

README.html

@@ -322,7 +322,7 @@ mkdir build
 cd build
 cmake ..
 make
-make reflowctl-upload
+make reflowctl-upload && ../serialmon.py
 </pre>
 </div>
 </body>

README.rst

@@ -13,4 +13,4 @@ Then you have to install cmake, for the serialmon.py script python and pyserial.
     cd build
     cmake ..
     make
-    make reflowctl-upload
+    make reflowctl-upload && ../serialmon.py

reflowctl/reflowctl.ino

@@ -1,4 +1,20 @@
 
+#define START_STATE 0
+#define PREHEAT_STATE 1
+#define RAMP_UP_STATE 2
+#define TAL_FIRST_STATE 3
+#define PEAK_STATE 4
+#define TAL_SECOND_STATE 5
+#define RAMPDOWN_STATE 6
+#define END_STATE 7
+#define ERROR_STATE 8
+
+// error conditions
+#define E_RAMPUP 1 // oven heats up too fast
+#define E_RAMPDOWN_TOO_FAST 2 // oven cools down too fast
+#define E_RAMPDOWN_TOO_SLOW 3 // oven cools down too slow
+#define E_TIME_MAX 4 // reflow process does take too long
+
 unsigned int time = 0; // profile seconds
 unsigned int temperatur = 25; // actual oven temp
 unsigned int last_temperatur = 25;
@@ -12,28 +28,18 @@ unsigned int tal = 217; // 217°C
 unsigned int tal_duration = 100; // 60-150s
 unsigned int peak_duration = 30; // 20-40s
 unsigned int rampdown_max = 6; // 6°C/s max
+unsigned int rampdown_min = 2; // 2°C/s max
 unsigned int time_max = 480; // 8*60s max
 
-#define START_STATE 0
-#define PREHEAT_STATE 1
-#define TAL_STATE 2
-#define MAX_STATE 3
-#define RAMPDOWN_STATE 4
-#define END_STATE 5
-#define ERROR_STATE 6
-
-byte state = START_STATE;
-
 unsigned int Ts_min_time = 0;
 unsigned int Ts_max_time = 0;
 unsigned int Tl_time = 0;
+unsigned int Tl_time_end = 0;
 unsigned int Tp_time = 0;
 unsigned int Tl_end_time = 0;
-
-#define RAMPUP_TOO_FAST 1
-#define RAMPDOWN_TOO_FAST 2
 unsigned int error_condition = 0;
 
+byte state = START_STATE;
 
 void setup() {
   pinMode(13, OUTPUT);
@@ -47,12 +53,40 @@ void get_temp() {
 
 boolean check_rampup_rate() {
   if (temperatur - last_temperatur > rampup_rate) {
-    error_condition = RAMPUP_TOO_FAST;
+    error_condition = E_RAMPUP;
     return false;
   }
   return true;
 }
 
+boolean check_rampdown_rate() {
+  unsigned int dt = temperatur - last_temperatur;
+  if (dt > rampdown_max) {
+    error_condition = E_RAMPDOWN_TOO_FAST;
+    return false;
+  }
+
+  if (dt < rampdown_min) {
+    error_condition = E_RAMPDOWN_TOO_SLOW;
+    return false;
+  }
+  return true;
+}
+
+boolean time_max_check() {
+  if (time > time_max) {
+    error_condition = E_TIME_MAX;
+    return false;
+  }
+}
+
+boolean check_tal_duration() {
+  if (time > time_max) {
+    error_condition = E_TIME_MAX;
+    return false;
+  }
+}
+
 void loop() {
   time = millis() / 1000;
   get_temp();
@@ -62,32 +96,38 @@ void loop() {
   Serial.print(" ");
   Serial.println(last_temperatur);
 
-  delay(1000);
-
   switch (state) {
       case START_STATE:
           // going from room temp to preheat, nothing to check here
           if (!check_rampup_rate())
               goto error;
           if (temperatur > Ts_min) {
+              Serial.println("Changed state to PREHEAT_STATE");
+              Ts_min_time = time;
               state++;
           }
       case PREHEAT_STATE:
           if (temperatur > Ts_max) {
             Serial.println("Changed state to PREHEAT_STATE");
+            Ts_max_time = time;
             state++;
           }
           break;
-      case TAL_STATE:
+      case TAL_FIRST_STATE:
         break;
-      case MAX_STATE:
+      case PEAK_STATE:
+        break;
+      case TAL_SECOND_STATE:
         break;
       case RAMPDOWN_STATE:
         break;
+      case END_STATE:
       default:
         break;
   }
 
+  delay(1000);
+
   return;
 
 error: