update

platformio.ini

@@ -12,9 +12,3 @@
 platform = espressif32
 board = upesy_wroom
 framework = arduino
-lib_deps = adafruit/Adafruit MPU6050@^2.2.6
-
-; How to change bit-per-second rate for your project:
-; Add right under [env:upesy_wroom]:
-; "monitor_speed = x" (without the "")
-; x == baudrate of selected choice, bsp: 115200, 8000, 300

src/main.cpp

@@ -1,141 +1,50 @@
 //--------------------------------------------------------------------------------------------------------------------------//
-// Setting up the Adafruit_MPU6050 library for the accelerator chip
+// Handling Interrupts correctly
 //--------------------------------------------------------------------------------------------------------------------------//
 
-// Check the other guide in the .docx as to how to INSTALL the necessary library //
+// What are Interrupts? //
+// You can see them as certain parts of a programm reacting to a condition at ANY time and place your programm is currently in.
+// You use them to time reads for example, or for signals, etc etc.
 
-// Must be included for most things! //
-#include <Arduino.h> // Only include once of course.
-#include <Adafruit_MPU6050.h>
-#include <Adafruit_Sensor.h>
-
-// Create instance of the sensor library //
-Adafruit_MPU6050 mpu;
+#include <Arduino.h>
 
 void setup()
 {
-    Serial.begin(115200); // For Serial communication, check if the right bit-per-second rate is selected!
-                          // If you want to change said bit-per-second, look in the .ini file for information.
-                          // How do you know the one selected does not work / there's something wrong in the .ini file?
-                          // Check the terminal, if that is the case everything printed is Unicode gibberish.
+    // Initializing the timer //
+    void IRAM_ATTR onTimer();
 
-    while(!Serial) delay(10); // Wait until the Serial communication is set up and initialized.
-    Serial.println("Starting..."); 
+    hw_timer_t *My_timer = 0;
+    My_timer = timerBegin(0, 80, true);
+    timerAttachInterrupt(My_timer, &onTimer, true);
+    timerAlarmWrite(My_timer, 5000, true);
+    timerAlarmEnable(My_timer);
 
-    if(!mpu.begin()) // Exception for the case of the mpu not starting up
-    {
-        // If this is the case, check the wiring and whether or not the right pins are connected.
-        // Another issue that could lead to this is too little or too much current going through the chip.
-        Serial.println("Failed to find MPU6050 chip.");
-        while(1)
-        {
-            delay(10);
+    // This is crutial and has to be in the setup.
+    // You can change the frequency as to when it gets called (Check it out online), as well as the reason. 
+    
+    // You can attach a timer to a Pin for example as well.
+    // That would look something like this:
+    //
+    // pinMode(SWITCH_PIN, INPUT_PULLUP);
+    // attachInterrupt(digitalPinToInterrupt(SWITCH_PIN), switchChanged, CHANGE);
+    // But it's not necessary if you're using Interrupts as a timer. 
 }
-    }
-    Serial.println("MPU6050 has been found.");
-
-    mpu.setAccelerometerRange(MPU6050_RANGE_8_G); // Set to the range of your choice for the accelerator values
-                                                  // depending on the range you want your read in values to vary in.
-    Serial.println("Accelerator range set to: ");
-    switch(mpu.getAccelerometerRange()) // Check setting and print for insight.
-    {
-        case MPU6050_RANGE_2_G:
-            Serial.println("+-2G");
-        	break;
-        case MPU6050_RANGE_4_G:
-            Serial.println("+-4G");
-            break;
-        case MPU6050_RANGE_8_G:
-            Serial.println("+-8G");
-            break;
-        case MPU6050_RANGE_16_G:
-            Serial.println("+-16G");
-            break;
-    }
-
-    mpu.setGyroRange(MPU6050_RANGE_500_DEG); 
-    Serial.print("Gyro range set to: ");
-    switch (mpu.getGyroRange()) 
-    {
-        case MPU6050_RANGE_250_DEG:
-            Serial.println("+- 250 deg/s");
-            break;
-        case MPU6050_RANGE_500_DEG:
-            Serial.println("+- 500 deg/s");
-            break;
-        case MPU6050_RANGE_1000_DEG:
-            Serial.println("+- 1000 deg/s");
-            break;
-        case MPU6050_RANGE_2000_DEG:
-            Serial.println("+- 2000 deg/s");
-            break;
-    }
-
-    mpu.setFilterBandwidth(MPU6050_BAND_21_HZ);
-    Serial.print("Filter bandwidth set to: ");
-    switch (mpu.getFilterBandwidth()) 
-    {
-        case MPU6050_BAND_260_HZ:
-            Serial.println("260 Hz");
-            break;
-        case MPU6050_BAND_184_HZ:
-            Serial.println("184 Hz");
-            break;
-        case MPU6050_BAND_94_HZ:
-            Serial.println("94 Hz");
-            break;
-        case MPU6050_BAND_44_HZ:
-            Serial.println("44 Hz");
-            break;
-        case MPU6050_BAND_21_HZ:
-            Serial.println("21 Hz");
-            break;
-        case MPU6050_BAND_10_HZ:
-            Serial.println("10 Hz");
-            break;
-        case MPU6050_BAND_5_HZ:
-            Serial.println("5 Hz");
-            break;
-    }
-
-    delay(100);
-
-    // What is the difference between "void setup()" and "void loop()"? Why put all this in here? //
-    // The setup fuction is only initialized once, and though that's true for the entire lifetime of the programm,
-    // the started services continue to run in here on this threat, allowing the loop to be executed simultaniously.
-    // Mind, and that's IMPORTANT!!, that you should refer from using "while(1)" in this function as much as possible.
-    // (I'm aware there is one in here in this project, but only because it is handled correctly and carefully.)
-}
-
-// Put your variables here for testing, otherwise I'd recommend putting it in a class //
-float _x_accel = 0; // x acceleration
-float _y_accel = 0; // y acceleration
-float _calc = 0; // for calculations
 
 void loop()
 {
-    // Save vals if you want to send them: //
-    sensors_event_t _a;
-    sensors_event_t _g;
-    sensors_event_t _temp; // Used as placeholder for now in the next function, even if you don't need temperature values.
 
-    mpu.getEvent(&_a, &_g, &_temp); // Reads in your values.
+}
 
-    _x_accel = _a.acceleration.x; // acceleration in x.
-    _y_accel = _a.acceleration.y; // acceleration in y.
-
-    // Basic example for use //
-    _calc = _y_accel * 12.5; // Calculate postion if you want to.
-    if(_calc > 100) // reduce values if you only want values from (-100) - 100 for example
+// Handling the function //
+void IRAM_ATTR onTimer()
 {
-        _calc = 100;
-    }
-    else if(_calc < (-100))
-    {
-        _calc = (-100);
+    // This function is called when the interrupt has been triggered.
+    
+    // Keep your operations in here as SIMPLE as possible, and as quick as possible.
+    // DO NOT do heavy processing on this threat, or perform long lasting operations.
+    // ^ That includes any sort of printing or writing to a file for example.
+    // Also refrain from using while(1) AT ALL COSTS. Short lasting while loops are fine, but also make sure they don't take too long to break out again.
 }
 
-    // And done! //
-    // Mind that everything in this loop repeats itself over and over, only stopping until the programm fails to execute or //
-    // the current is cut. If you'd like to restart everything, press the little button titled "RST" or "BOOT" (if the first does nothing) on the ESP. // 
-}
+// That is basically it for now regarding simple interrupts.
+// It's useful regarding sending data only like every 5 minutes, or every 10 milliseconds for example. Use it carefully, and happy coding. :D