Kiirem saatmine ~100us jaoks, mõõtesageduse muutmine

scope.ino

@@ -4,21 +4,36 @@
 #define PIN_BUTTON_4 2
 #define PIN_ADC 7 // A7
 
-#define BUTTON_1 0
-#define BUTTON_2 1
-#define BUTTON_3 2
-#define BUTTON_4 3
+#define BUTTON_RANGE_DN 0
+#define BUTTON_RANGE_UP 1
+#define BUTTON_FREQ 2 // Change frequency
+#define BUTTON_RUNSTOP 3
 
-// Cursor values
-#define CURSOR_1 "5.00"
-#define CURSOR_2 "0.00"
+#define PERIOD_10MS 0
+#define PERIOD_1MS 1
+#define PERIOD_100US 2
+#define PERIOD_10US 3
+#define PERIOD_100MS 4
+#define PERIOD_1S 5
+
+// Cursor values in format xx.x
+#define CURSOR_1 "5.0"
+#define CURSOR_2 "0.0"
 
 // https://www.gammon.com.au/adc
 
+// Globals
+char G_PrintfBuf[32];
+char G_CursorBuf[5+1+5+1+1];
+char G_MeasureFreq;
+// ReadButton globals
 unsigned long G_LastDebounceTime[4];
 int G_ButtonState[4];
 int G_PrevButtonState[4];
 #define DEBOUNCE_DELAY_MS 25
+// Flash data
+extern const char FLASH_VoltageTable[1024 * 3] PROGMEM;
+
 byte ReadButton(int Button)  
 {
     const int ButtonPins[4] = { PIN_BUTTON_1, PIN_BUTTON_2, PIN_BUTTON_3, PIN_BUTTON_4 };
@@ -56,12 +71,6 @@ void InitADC()
     ADCSRA |= bit(ADATE);  // Enable auto trigger
 }
 
-#define PERIOD_10MS 0
-#define PERIOD_1MS 1
-#define PERIOD_100US 2
-#define PERIOD_10US 3
-#define PERIOD_100MS 4
-#define PERIOD_1S 5
 // Set timer 1 to a specified measuring interval
 void SetTimerPeriod(int Period)
 {
@@ -115,24 +124,23 @@ void SetTimerPeriod(int Period)
     sei();
 }
 
-volatile int results[100];
-volatile int resultNumber = 0;
-char G_PrintfBuf[32];
-
 // ADC complete ISR
 ISR(ADC_vect)
 {
-    //int tstart = micros();
-
-    // Range is 0-4.8 V
-    // TODO the printing here needs to be faster
-    sprintf(G_PrintfBuf, "%s\t%s\t", CURSOR_1, CURSOR_2);
-    Serial.print(G_PrintfBuf);
-    Serial.println((ADC / 1023.0) * 4.8);
-    //Serial.println(5);
-
-    //sprintf(G_PrintfBuf, "%d\n", micros() - tstart);
-    //Serial.println(G_PrintfBuf);
+    //unsigned long tstart = micros();
+
+    //Serial.println((ADC / 1023.0) * 4.8);
+    Serial.write(G_CursorBuf);
+    volatile unsigned int Value = ADC;
+    int P = Value * 3;
+    Serial.write(pgm_read_word_near(FLASH_VoltageTable + P + 0));
+    Serial.write('.');
+    Serial.write(pgm_read_word_near(FLASH_VoltageTable + P + 1));
+    Serial.write(pgm_read_word_near(FLASH_VoltageTable + P + 2));
+    Serial.write('\r');
+    Serial.write('\n');
+
+    //Serial.println(micros() - tstart);
 } 
 
 EMPTY_INTERRUPT (TIMER1_COMPB_vect);
@@ -147,22 +155,45 @@ void setup()
 
     Serial.begin(2000000);
 
-    SetTimerPeriod(PERIOD_100US);
+    SetTimerPeriod(PERIOD_10MS);
+    G_MeasureFreq = PERIOD_10MS;
     InitADC();
 
     for(int i = 0; i < 4; i++) G_LastDebounceTime[i] = 0;
     for(int i = 0; i < 4; i++) G_PrevButtonState[i] = HIGH;
+
+    sprintf(G_CursorBuf, "%s\t%s\t", CURSOR_1, CURSOR_2); // Precalculate the cursor string
 }
 
+int lstate = LOW;
 void loop()
 {
-    for(int i = 0; i < 4; i++)
+    if(ReadButton(BUTTON_RANGE_UP) == 1)
     {
-        byte State = ReadButton(i);
-        if(State == 1)
+        if(lstate == LOW) lstate = HIGH;
+        else lstate = LOW;
+        digitalWrite(LED_BUILTIN, lstate);
+    }
+
+    if(ReadButton(BUTTON_RANGE_DN) == 1)
+    {
+        if(lstate == LOW) lstate = HIGH;
+        else lstate = LOW;
+        digitalWrite(LED_BUILTIN, lstate);
+    }
+
+    if(ReadButton(BUTTON_FREQ) == 1)
     {
-            sprintf(G_PrintfBuf, "Button %d is %d\n", i, State);
-            Serial.println(G_PrintfBuf);
+        G_MeasureFreq++;
+        if(G_MeasureFreq == PERIOD_10US + 1) G_MeasureFreq = PERIOD_10MS;
+        //if(G_MeasureFreq == PERIOD_1S + 1) G_MeasureFreq = PERIOD_10MS;
+        SetTimerPeriod(G_MeasureFreq);
     }
+
+    if(ReadButton(BUTTON_RUNSTOP) == 1)
+    {
+        if(lstate == LOW) lstate = HIGH;
+        else lstate = LOW;
+        digitalWrite(LED_BUILTIN, lstate);
     }
 }