Added better pin debouncing, voltage references, python parsing, groundtruth measurements

.gitignore

@@ -24,3 +24,6 @@ fp-info-cache
 # Exported BOM files
 *.xml
 *.csv
+
+# ipynb checkpoints
+.ipynb_checkpoints

Firmware/pcb_reflow_fw/pcb_reflow_fw.ino

@@ -68,7 +68,6 @@ volatile single_button_state_t dn_button_state = BUTTON_NO_ACTION;
 volatile unsigned long up_state_change_time = 0;
 volatile unsigned long down_state_change_time = 0;
 
-
 // Temperature Info
 byte max_temp_array[] = {140, 150, 160, 170, 180};
 byte max_temp_index = 0;
@@ -197,7 +196,6 @@ void upsw_change_isr() {
     up_state_change_time = millis();
 }
 
-
 void setup() {
 
     // Pin Direction control
@@ -286,13 +284,9 @@ inline void setupSensors() {
     }
 }
 
-inline void setFastPwm() {
+inline void setFastPwm() { analogWriteFrequency(64); }
-    analogWriteFrequency(64);
-}
 
-inline void setVREF() {
+inline void setVREF() { analogReference(INTERNAL1V5); }
-    analogReference(INTERNAL1V5);
-}
 
 inline bool isFirstBoot() {
     uint8_t first_boot = EEPROM.read(FIRSTTIME_BOOT_ADDR);
@@ -467,8 +461,10 @@ buttons_state_t getButtonsState() {
     unsigned long cur_time = millis();
     buttons_state_t state = BUTTONS_NO_PRESS;
 
-    if(button_dn == BUTTON_PRESSED && button_up == BUTTON_PRESSED && abs(button_dn_time - button_up_time) < BUTTON_PRESS_TIME) {
+    if (button_dn == BUTTON_PRESSED && button_up == BUTTON_PRESSED &&
-        if(cur_time - button_dn_time > BUTTON_PRESS_TIME && cur_time - button_up_time > BUTTON_PRESS_TIME) {
+        abs(button_dn_time - button_up_time) < BUTTON_PRESS_TIME) {
+        if (cur_time - button_dn_time > BUTTON_PRESS_TIME &&
+            cur_time - button_up_time > BUTTON_PRESS_TIME) {
             state = BUTTONS_BOTH_PRESS;
             noInterrupts();
             dn_button_state = BUTTON_NO_ACTION;
@@ -621,8 +617,8 @@ bool heat(byte max_temp, int profile_index) {
         }
 
         // Measure Values
-        // TODO(HEIDT) getting the temperature from the digital sensors is by far the slowest part of this loop.
+        // TODO(HEIDT) getting the temperature from the digital sensors is by far the slowest part
-        // figure out an approach that allows control faster than sensing
+        // of this loop. figure out an approach that allows control faster than sensing
         t = getTemp();
         v = getVolts();
         float max_possible_amperage = v / bed_resistance;

Firmware/temperature_groundtruth_fw/temperature_groundtruth_fw.ino

@@ -0,0 +1,57 @@
+#include <Adafruit_MAX31865.h>
+
+// Use software SPI: CS, DI, DO, CLK
+Adafruit_MAX31865 thermo = Adafruit_MAX31865(3, 4, 5, 6);
+
+// The value of the Rref resistor. Use 430.0 for PT100 and 4300.0 for PT1000
+#define RREF      430.0
+// The 'nominal' 0-degrees-C resistance of the sensor
+// 100.0 for PT100, 1000.0 for PT1000
+#define RNOMINAL  100.0
+
+
+void setup() {
+    Serial.begin(115200);
+    Serial1.begin(9600);
+    thermo.begin(MAX31865_3WIRE);  // set to 2WIRE or 4WIRE as necessary
+
+}
+
+void loop() {
+
+
+  uint8_t fault = thermo.readFault();
+  if (fault) {
+    Serial.print("Fault 0x"); Serial.println(fault, HEX);
+    if (fault & MAX31865_FAULT_HIGHTHRESH) {
+      Serial.println("RTD High Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_LOWTHRESH) {
+      Serial.println("RTD Low Threshold"); 
+    }
+    if (fault & MAX31865_FAULT_REFINLOW) {
+      Serial.println("REFIN- > 0.85 x Bias"); 
+    }
+    if (fault & MAX31865_FAULT_REFINHIGH) {
+      Serial.println("REFIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_RTDINLOW) {
+      Serial.println("RTDIN- < 0.85 x Bias - FORCE- open"); 
+    }
+    if (fault & MAX31865_FAULT_OVUV) {
+      Serial.println("Under/Over voltage"); 
+    }
+    thermo.clearFault();
+  }
+
+    String s;
+    if (Serial1.available()) {
+        s = Serial1.readStringUntil('\n');
+        Serial.println(s);
+    }
+
+    if (s.indexOf("Temps") >= 0) {
+        Serial.print("Groundtruth ");
+        Serial.println(thermo.temperature(RNOMINAL, RREF));
+    }
+}