Feat: add square wave lookup table generation

Refs: #2

src/generators.cpp

@@ -1,6 +1,8 @@
 #include "generators.h"
+#include "wave.h"
 
-sample_table_t gen_sin() {
+sample_table_t gen_sin()
+{
   // Make the new Wavetable object
   sample_table_t sin_vals = {0};
   // Make a place to store calculated value
@@ -15,3 +17,19 @@ sample_table_t gen_sin() {
   // Return the completed Wavetable object
   return sin_vals;
 }
+
+sample_table_t gen_squ()
+{
+  sample_table_t squ_vals = {0};
+
+  // Start high and go low at halfway
+  for (uint16_t i = 0; i < DEFAULT_N_SAMPLES; i++) {
+    if (i < (DEFAULT_N_SAMPLES / 2)) {
+      squ_vals[i] = 1;
+    } else {
+      squ_vals[i] = -1;
+    }
+  }
+
+  return squ_vals;
+}

src/wave.cpp

@@ -1,12 +1,10 @@
-#include <iostream>
-
 #include "wave.h"
 
 // Initialize index at 0 for wave cycles and wave tables
 uint16_t Wave::m_nid = 0;
 
 void Wave::print_head() {
-  for (uint8_t i = 0; i < 10; i++) {
+  for (uint8_t i = 0; i < 3; i++) {
     std::cout << m_table[i] << '\n';
   }
 }

src/wave.h

@@ -4,6 +4,7 @@
 #ifndef WAVE_H_
 #define WAVE_H_
 
+#include <iostream>
 #include <array>
 #include <cstdint>
 
@@ -33,7 +34,7 @@ public:
    */
   void setTable(sample_table_t table) { m_table = table; }
 
-  /*! Prints the first 10 values of sample data */
+  /*! Prints the first 3 values of sample data */
   void print_head();
 };
 

src/wtpp.cpp

@@ -24,24 +24,25 @@ static void log(std::string message)
 
 int main()
 {
-  // Generate basic wave lookup tables
   log("Generating wave cycle lookup tables");
+  Wave sin_wave, squ_wave;
 
-  // Generate sine wave cycle object
+  // Calculate fundamental wave values
-  Wave sin_wave;
-
-  // Calculate sine values
   sample_table_t sin_vals = gen_sin();
+  sample_table_t squ_vals = gen_squ();
 
   // Set wave lookup table values
   sin_wave.setTable(sin_vals);
-
+  squ_wave.setTable(squ_vals);
-  // Create Wavetable object
-  Wavetable wt_01{"Basic Sine"};
-  log(wt_01.name());
 
   log("Printing head of sine table");
   sin_wave.print_head();
+  log("Printing head of square table");
+  squ_wave.print_head();
+
+  // Create Wavetable object containing fundamental Wave objects
+  Wavetable wt_01{"Fundamental Waves"};
+  log(wt_01.name());
 
   return 0;
 }