dualchannel.ino

@@ -0,0 +1,87 @@
+//this works from the electronics crate, reads out Ch 6 and Ch7 fast enough, peak samples generally occur at 4th position on readback. 
+//Shotky diodes are used to prevent negative voltage hurting the ADC.
+
+int x;  // read value
+int adcloopctr;
+unsigned long values[200];
+const int eventtrigger = 49;
+boolean eventhappened = false; 
+int sampledepth = 10;
+int printctr = 0;
+int readoutctr;
+
+void setup()
+{
+//  analogReference(INTERNAL);
+  pinMode(eventtrigger, INPUT);
+attachInterrupt(eventtrigger, monkey, FALLING);
+  Serial.begin(115200);                           // initialize the serial port:
+  REG_ADC_MR = 0x10380180;                       // change from 10380200 to 10380180, 1 is the PREESCALER and 8 means FREERUN
+  ADC -> ADC_CHER = 0x03; // enable ADC on pin A6 and A7
+eventhappened = false;
+adcloopctr=0;
+Serial.println("Alive");
+}
+
+void loop() {
+
+  //unsigned long t = micros();                    // init time an elapsed time, in micro seconds
+  
+  //for(i = 0; i < 1000; i++) {
+    
+    // instrucction to measure
+    while((ADC->ADC_ISR & 0x3)==0);             // wait for conversion
+    values[adcloopctr+100] = ADC->ADC_CDR[0];                         // read value A0
+    values[adcloopctr] = ADC->ADC_CDR[1];                         // read value A0
+    
+
+  
+  
+if (eventhappened){
+    //Serial.println("Event");
+    //for (int printctr = adcloopctr+1; printctr+1 < sampledepth+adcloopctr; printctr++) {
+    //Serial.print(printctr);
+    //Serial.print(", ");
+    //if (printctr > sampledepth){
+    //Serial.println(values[(printctr)]);
+    //Serial.println(values[(printctr)]);
+    //}
+    //printctr = ++printctr % sampledepth;
+readoutctr=10;
+    for (int firsthalf=adcloopctr+1; firsthalf<sampledepth; firsthalf++)
+    {
+      Serial.print(readoutctr);
+      Serial.print(", ");
+      Serial.print(values[firsthalf]);
+      Serial.print(", ");
+      Serial.println(values[firsthalf+100]);
+      
+      
+      readoutctr--;
+    }
+    for (int secondhalf=0; secondhalf<adcloopctr+1; secondhalf++)
+    {
+      Serial.print(readoutctr);
+      Serial.print(", ");
+      Serial.print(values[secondhalf]);
+      Serial.print(", ");
+      Serial.println(values[secondhalf+100]);
+      readoutctr--;
+    }
+    
+    eventhappened = false;
+    //delay(200);
+  }
+adcloopctr++;
+  if (adcloopctr==sampledepth) {
+adcloopctr=0;
+}
+
+ 
+}
+
+void monkey()
+{
+  //Serial.println("trigger");
+eventhappened = true;
+}