Diff: LUTs/LUTS.cpp

Revision:

31:cfdb014ff086

Parent:

30:08cc4ec58d07

--- a/LUTs/LUTS.cpp	Tue May 26 10:17:47 2020 +0000
+++ b/LUTs/LUTS.cpp	Tue May 26 14:21:36 2020 +0000
@@ -21,8 +21,8 @@
 void LUTs::sin_wavetable()
 {
     //printf("Generating sin Wavetable \n");
-    for (int i=0; i<1024; i++) {
-        sin_d= 65535*(0.5*sin(2.0*PI*(i/1024.0))+0.5);
+    for (int i=0; i<1024; i++) { //Size of table
+        sin_d= 65535*(0.5*sin(2.0*PI*(i/1024.0))+0.5); //Genrate Value
         rem= fmod(sin_d,1); //calculates remainder for rounding
         //printf("preround= %g -", sin_d); //DEBUG
         if (rem>=0.5) {
@@ -31,70 +31,70 @@
             sin_d= floor(sin_d-rem); //round DOWN
         }
         // printf("Postround= %g -",sin_d); //DEBUG
-        sin_u=((uint16_t)sin_d);
+        sin_u=((uint16_t)sin_d); //Value converted to unsigned
         //printf("sin_u= %u \n", sin_u);
-        sin_wavtable[i]=sin_u;
+        sin_wavtable[i]=sin_u;//Sets in Global Variable
         //sin_wavtable[i]=get_sin(i);
     }
-    /*//DEBUG
+    #ifdef SLOW_TIME
     for (int i=0; i<1024; i=i+128) {
-    printf("sin_wav[%d]= %u \n", i, sin_wavtable);
-    } */
+    printf("sin_wav[%d]= %u \n", i, sin_wavtable); //prints Key values
+    } 
+    #endif
 }
 
 void LUTs::tri_wavetable(int pulsewidth)
 {
     //printf("Generating Tri-wavetable\n");
-    tri_wavtable[0]=0;
-    rise_t=(pulsewidth*1024/100);
+    tri_wavtable[0]=0; //sets 0 value
+    rise_t=(pulsewidth*1024/100); //Calculates rise samples
     rise_tu=(uint16_t)rise_t;
-    fall_tu=1024-rise_tu;
-    dif=65536/rise_t;
-    dif_u=(uint16_t)dif;
+    fall_tu=1024-rise_tu; //Calculates fall samples
+    dif=65536/rise_t; //Calculates Rise Dif
+    dif_u=(uint16_t)dif; //converts to uint
     
-    #ifdef SLOW_TIME
+    #ifdef SLOW_TIME //Prints Values in SLOW_TIME case
     printf("PRINTING TRI WAVETABLE Values\n");
     printf("PW= %d \n",pulsewidth);
     printf("Rise Samples= %u\n", rise_tu);
     printf("Fall Samples= %u\n", fall_tu);
     printf("UP sample dif= %u\n", dif_u);
     #endif   
-    for (int i=1; i<=rise_tu; i++) {
+    for (int i=1; i<=rise_tu; i++) { //Generates Rise Points
         tri_wavtable[i]=tri_wavtable[i-1]+dif_u;
     }
-    dif=65536/fall_tu;
+    dif=65536/fall_tu; //Calcualtes Fall Diff
     dif_u=(uint16_t)dif;
     
     #ifdef SLOW_TIME
-    //printf("down sample dif= %u\n", dif_u);
+    printf("down sample dif= %u\n", dif_u);
     #endif  
-    for (int i=rise_tu; i<1024; i++) {
+    for (int i=rise_tu; i<1024; i++) { //Generates Fall Points
         tri_wavtable[i]=65535-((i-rise_tu)*dif_u);
     }
-        
     #ifdef SLOW_TIME
-    //tri_wav_results();
+    tri_wav_results();//Prints Key Results
     #endif
 }
 
 
 void LUTs::pulse_wavetable(int pulsewidth)
 {
-    printf("Generating Pulse-wavetable\n");
-    up_t=(pulsewidth*1024/100);
+    //printf("Generating Pulse-wavetable\n");
+    up_t=(pulsewidth*1024/100); //Samples Up
     up_tu=(uint16_t)up_t;
-    for (int i=0; i<=up_tu; i++) {
-        pulse_wavtable[i]=58981;
+    for (int i=0; i<=up_tu; i++) { //Until Down
+        pulse_wavtable[i]=58981; //Headroom to normalise Volume
         //printf("up itt = %d\n",i);
     }
 
-    for (int i=up_tu+1; i<1024; i++) {
-        pulse_wavtable[i]=6553;
+    for (int i=up_tu+1; i<1024; i++) { //Until Over
+        pulse_wavtable[i]=6553; //HEadroom Included
         //printf("down itt = %d\n",i);
     }
 }
 
-void LUTs::tri_wav_results() {
+void LUTs::tri_wav_results() { //Prints Results
     printf("TRI_WAV_RESULTS:\n");
     printf("i,out\n");
     for (i=0; i<=1024; i=i+64) {