Removed the non-shiftreg code and added the MOC triac control output

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>

diff --git a/PlateWarmer.ino b/PlateWarmer.ino
index 22a45abcf6b965b1e6da93426851a8294c4719c8..a43cb1e54079c093263739521cd9c9ec92e7011f 100644 (file)
--- a/PlateWarmer.ino
+++ b/PlateWarmer.ino
@@ -17,7 +17,6 @@
 #include <avr/eeprom.h>
 
 #define COMMON_CATHODE // This device is common cathode
-#define HAVE_SHIFT_REGISTER 1 // We are using a shift register
 
 // declare the digital pins for each segment led
 #define SEG_A 6
@@ -30,9 +29,10 @@
 #define SEG_DP 13
 
 #define LED_PIN 13
-#define SHIFTREG_DATA  4 // DS pin
-#define SHIFTREG_CLOCK 3 // SHCP pin
-#define SHIFTREG_LATCH 2 // STCP pin
+#define MOC_PIN 8
+#define SHIFTREG_CLOCK 2 // SHCP (pin 11)
+#define SHIFTREG_LATCH 3 // STCP (pin 12)
+#define SHIFTREG_DATA  4 // DS (pin 14)
 
 #define BUTTON_L 6 // left button
 #define BUTTON_R 5 // right button
@@ -98,19 +98,9 @@ static void Serial_print(PGM_P s)
 static void
 set_segments(byte v)
 {
-#if HAVE_SHIFT_REGISTER
     digitalWrite(SHIFTREG_LATCH, LOW);
     shiftOut(SHIFTREG_DATA, SHIFTREG_CLOCK, MSBFIRST, v);
     digitalWrite(SHIFTREG_LATCH, HIGH);
-#else
-    digitalWrite(SEG_G, (v & 0x40) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_F, (v & 0x20) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_E, (v & 0x10) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_D, (v & 0x08) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_C, (v & 0x04) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_B, (v & 0x02) ? SEG_ON : SEG_OFF);
-    digitalWrite(SEG_A, (v & 0x01) ? SEG_ON : SEG_OFF);
-#endif
 }
 
 // Select one digit and display the value using the lookup table to
@@ -134,13 +124,7 @@ display(int digit, const char *num)
 
     // select our digit and configure
     digitalWrite(select[digit], LOW);
-#if HAVE_SHIFT_REGISTER
     set_segments( Digits[num[digit] - 0x30] | ((digit == 1) ? 0x80 : 0) );
-#else
-    set_segments(Digits[num[digit] - 0x30]);
-    // set the decimal point on digit 2
-    digitalWrite(SEG_DP, (digit == 1) ? SEG_ON : SEG_OFF);
-#endif
 }
 
 // Initialize timer2 as interrupt source
@@ -175,7 +159,7 @@ ISR(TIMER2_OVF_vect)
     current_digit = (current_digit + 1) % 4;
     ++led_cnt;
     if (led_cnt > 166) {
-        PORTB ^= _BV(PB5);
+        //PORTB ^= _BV(PB5); // toggle pin 13
         led_cnt = 0;
     }
 }
@@ -223,25 +207,18 @@ setup()
 
     // Enable the internal 1.1V AREF (requires 10nF cap to GND)
     analogReference(INTERNAL);
+    pinMode(LM35_PIN, INPUT);
     
-#if HAVE_SHIFT_REGISTER
     pinMode(SHIFTREG_DATA, OUTPUT);
     pinMode(SHIFTREG_LATCH, OUTPUT);
     pinMode(SHIFTREG_CLOCK, OUTPUT);
     pinMode(BUTTON_L, INPUT);
     pinMode(BUTTON_R, INPUT);
+    pinMode(MOC_PIN, OUTPUT);
+    digitalWrite(MOC_PIN, HIGH);
     pinMode(LED_PIN, OUTPUT);
     digitalWrite(LED_PIN, HIGH);
-#else
-    pinMode(SEG_A, OUTPUT);
-    pinMode(SEG_B, OUTPUT);
-    pinMode(SEG_C, OUTPUT);
-    pinMode(SEG_D, OUTPUT);
-    pinMode(SEG_E, OUTPUT);
-    pinMode(SEG_F, OUTPUT);
-    pinMode(SEG_G, OUTPUT);
-    pinMode(SEG_DP, OUTPUT);
-#endif
+
     pinMode(SEL_1, OUTPUT);
     pinMode(SEL_2, OUTPUT);
     pinMode(SEL_3, OUTPUT);
@@ -257,13 +234,20 @@ setup()
     Timer2Init();
 }
 
+#define AREF 105L
+
 static long getTemperature()
 {
-    long v;
+    long v,v1;
     v = analogRead(LM35_PIN);
+    // v * REFERENCE) / NSTEPS
+    v1 = (v * AREF * 100L) / 1024L;
+    v = (v * 10000L) / 1024L;
+    Serial.print("[");
     Serial.print(v);
-    v = v * 10000L / 931L;
     Serial.print(" ");
+    Serial.print(v1);
+    Serial.print("] ");
     return v;
 }
 
@@ -354,6 +338,16 @@ loop()
                 v += t[n];
             }
             v /= NUMSAMPLES;
+            // setting pin 8 low puts the MOC led _on_
+            if (v < target_temp) {
+                digitalWrite(MOC_PIN, LOW);
+                digitalWrite(LED_PIN, HIGH);
+            } else {
+                digitalWrite(MOC_PIN, HIGH);
+                digitalWrite(LED_PIN, LOW);
+            }
+            // pin 8 == PORTB pin 0: low for on
+            Serial.print((PORTB&1) ? "off " : "on  ");
             Serial.println(v);
             setDisplay(v);
         }