Implement sound1 control registers

.gitignore

@@ -10,4 +10,7 @@ a.out
 roms/
 third_party/fmt
 bios.bin
-*.sav
+*.sav
+*.swp
+./.tags
+

Makefile

@@ -6,10 +6,10 @@ SOURCE = src
 INCLUDE = include
 BACKUPDIR = $(INCLUDE)/backup
 OBJ = \
+	config.o \
 	APU.o \
 	Arm7.o \
 	arm_isa.o \
-	config.o \
 	Discovery.o \
 	Flash.o \
 	Gamepad.o \
@@ -33,6 +33,12 @@ ifdef opt
 CXXFLAGS += -Ofast
 endif
 
+# Use verbose output
+# run `make verbose=1`
+ifdef verbose
+CXXFLAGS += -Wall -pedantic
+endif
+
 all: discovery
 discovery: $(LIST) main.cpp
 	$(CXX) $(CXXFLAGS) -o discovery $(SOURCE)/main.cpp $(LIST) $(LIBS)

README.md

@@ -22,6 +22,65 @@ Discovery will attempt to load a BIOS in the same directory as the executable ca
 
 `./discovery path/to/rom -b path/to/bios`
 
+### Flags
+
+| Flag | | Type | Description|
+|----|----|----|----|
+`-i` | `--input` | `string` | Specify the input ROM
+`-b` | `--bios` | `string` | Specify the BIOS Discovery will use
+`-c` | `--config` | `string` | Specify the config file Discovery will use
+`-h` | `--help` | `boolean` | Print Discovery help
+
+## Configuration
+
+By default Discovery will load and read settings from a file named `discovery.config`. Alternatively, you can load from a different config file
+using: 
+
+`./discovery -c my_alt_config.file`
+
+The syntax for a config file is very simple. Key-value pairs are set like so:
+
+```
+# this is a comment
+set_key = values_like_this
+```
+
+Below is a table describing the keys Discovery will recognize.
+
+### Configuration options
+
+|Key | Description|
+|----|----|
+`gba_a         `  | Map the A button to the specified key
+`gba_b         `  | Map the B button to the specified key
+`gba_sel       `  | Map the Select button to the specified key
+`gba_start     `  | Map the Start button to the specified key
+`gba_dpad_right`  | Map right on the dpad to the specified key
+`gba_dpad_left `  | Map left on the dpad to the specified key
+`gba_dpad_up   `  | Map up on the dpad to the specified key
+`gba_dpad_down `  | Map down on the dpad the specified key
+`gba_r         `  | Map the R button to the specified key
+`gba_l         `  | Map the L button to the specified key
+
+#### Example
+
+This example config file will map controls to WASD keys, using the k, l, o, and p 
+keys for the A, B, L and R buttons, respectively:
+
+```
+# map buttons to WASD controls
+gba_dpad_up = w 
+gba_dpad_down = s
+gba_dpad_left = a
+gba_dpad_right = d
+gba_a = k
+gba_b = l
+gba_r = o
+gba_l = p
+gba_start = cr
+gba_sel = bs
+```
+
 ## Building on Linux based systems
 Discovery has the following dependencies:
 - make

discovery.config

@@ -0,0 +1,12 @@
+# map keys
+gba_dpad_up = up
+gba_dpad_down = down
+gba_dpad_left = left
+gba_dpad_right = right
+gba_a = x
+gba_b = z
+gba_r = s
+gba_l = a
+gba_start = cr
+gba_sel = bs
+

docs/css/styles.css

@@ -81,3 +81,24 @@ hr {
 .bl {
   margin-bottom: 16px;
 }
+
+.figure {
+  display: flex;
+  flex-direction: column;
+  margin-top: 2rem;
+  margin-bottom: 2rem;
+}
+
+.figure-text {
+  margin-left: auto;
+  margin-right: auto;
+  max-width: 66.66666%;
+  margin-top: .5rem;
+}
+
+.figure-image {
+  margin-left: auto;
+  margin-right: auto;
+  max-width: 81.33333%;
+  max-height: 81.33333%;
+}

docs/docs.html

@@ -74,34 +74,49 @@ <h5 class="toc-header"> Table of contents </h5>
               <a href="#sound-resources" class="section"><li>Sound resources</li></a>
               <ul>
                 <li>Register details:
-                <a href=">http://www.belogic.com/gba/registers.shtml">http://www.belogic.com/gba/registers.shtml></a></li>
+                <a href="http://www.belogic.com/gba/registers.shtml">http://www.belogic.com/gba/registers.shtml></a></li>
 
                 <li>SDL sound spec:
-                <a href=">https://wiki.libsdl.org/SDL_AudioSpec">https://wiki.libsdl.org/SDL_AudioSpec></a></li>
+                <a href="https://wiki.libsdl.org/SDL_AudioSpec">https://wiki.libsdl.org/SDL_AudioSpec></a></li>
 
                 <li>Sound generator:
-                <a href=">https://stackoverflow.com/questions/10110905/simple-sound-wave-generator-with-sdl-in-c">https://stackoverflow.com/questions/10110905/simple-sound-wave-generator-with-sdl-in-c></a></li>
+                <a href="https://stackoverflow.com/questions/10110905/simple-sound-wave-generator-with-sdl-in-c">https://stackoverflow.com/questions/10110905/simple-sound-wave-generator-with-sdl-in-c></a></li>
 
                 <li>Sound / opening the audio device:
-                <a href=">https://web.archive.org/web/20130724194546/http://www.libsdl.org:80/intro.en/usingsound.html">https://web.archive.org/web/20130724194546/http://www.libsdl.org:80/intro.en/usingsound.html></a></li>
+                <a href="https://web.archive.org/web/20130724194546/http://www.libsdl.org:80/intro.en/usingsound.html">https://web.archive.org/web/20130724194546/http://www.libsdl.org:80/intro.en/usingsound.html></a></li>
 
                 <li>Tone generator reference:
-                <a href=">https://github.com/psycotica0/tone-generator/blob/master/generator.c">https://github.com/psycotica0/tone-generator/blob/master/generator.c></a></li>
+                <a href="https://github.com/psycotica0/tone-generator/blob/master/generator.c">https://github.com/psycotica0/tone-generator/blob/master/generator.c></a></li>
 
                 <li>GBA audio in depth:
-                <a href=">https://www.coranac.com/tonc/text/sndsqr.htm#sec-intro">https://www.coranac.com/tonc/text/sndsqr.htm#sec-intro></a></li>
+                <a href="https://www.coranac.com/tonc/text/sndsqr.htm#sec-intro">https://www.coranac.com/tonc/text/sndsqr.htm#sec-intro></a></li>
 
                 <li>SDL sine wave generator:
-                <a href=">https://gist.github.com/MasterQ32/46ffd78a6cf261c73a1fddb93a478ebe">https://gist.github.com/MasterQ32/46ffd78a6cf261c73a1fddb93a478ebe></a></li>
+                <a href="https://gist.github.com/MasterQ32/46ffd78a6cf261c73a1fddb93a478ebe">https://gist.github.com/MasterQ32/46ffd78a6cf261c73a1fddb93a478ebe></a></li>
 
                 <li>Spongebob square wave:
-                <a href=">https://davidgow.net/handmadepenguin/ch8.html">https://davidgow.net/handmadepenguin/ch8.html></a></li>
+                <a href="https://davidgow.net/handmadepenguin/ch8.html">https://davidgow.net/handmadepenguin/ch8.html></a></li>
 
                 <li>More details :
-                <a href=">https://www.problemkaputt.de/gbatek.htm#gbasoundchannel1tonesweep">https://www.problemkaputt.de/gbatek.htm#gbasoundchannel1tonesweep></a></li>
+                <a href="https://www.problemkaputt.de/gbatek.htm#gbasoundchannel1tonesweep">https://www.problemkaputt.de/gbatek.htm#gbasoundchannel1tonesweep></a></li>
 
                 <li>Sound timing:
-                <a href=">http://ianfinlayson.net/class/cpsc305/notes/19-sound">http://ianfinlayson.net/class/cpsc305/notes/19-sound></a></li>
+                <a href="http://ianfinlayson.net/class/cpsc305/notes/19-sound">http://ianfinlayson.net/class/cpsc305/notes/19-sound></a></li>
+
+                <li>
+                  Fourier transform within window function:
+                  <a href="https://stackoverflow.com/questions/43479528/how-can-i-perform-a-realtime-fft-on-sdl2-audio-stream-data">https://stackoverflow.com/questions/43479528/how-can-i-perform-a-realtime-fft-on-sdl2-audio-stream-data</a>
+                </li>
+                <li>SDL Audio callback locking:
+                <a href="https://wiki.libsdl.org/SDL_LockAudioDevice">https://wiki.libsdl.org/SDL_LockAudioDevice</a>i
+                </li>
+                <li>
+                  Nyquist-Shannon sampling theorem for brudging between continuous-time 
+                  signals and discrete-time signals
+                  <a href="https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem">
+                    https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem
+                  </a>
+                </li>
               </ul>
             </div>
 
@@ -111,13 +126,27 @@ <h5 class="toc-header"> Table of contents </h5>
             <div class="bl">
               <a href="#fourier" class="section"><li>Fourier transform</li></a>
 
-              <div class="equation" id="eq1.0"></div>
               <script>
+                // fourier
                 el = document.getElementById("eq1.0")
                 eq = `
-                  \\hat{f}(\\xi) = \\int_{-\\infty}^{\\infty}f(x)e^{-2 \\pi i x \\xi}\\, dx
+                  \\hat{f}(\\xi) = \\int_{t_0}^{t_1}f(t)e^{-2 \\pi i t \\xi}\\, dt
                 `
                 this.latex.render(eq, el)
+
+                // xi
+                el = [...document.getElementsByClassName("xi")]
+                eq = `
+                  \\xi
+                `
+                this.latex.render(eq, el, false)
+
+                // t
+                el = [...document.getElementsByClassName("t")]
+                eq = `
+                  t
+                `
+                this.latex.render(eq, el, false)
               </script>
               Just trying out <span id="latex0"></span> in HTML
               <script>

docs/js/render.js

@@ -10,14 +10,15 @@ const renderEl = (str, el, displayMode, handleErr) => {
 const render = (str, el, displayMode=true, handleErr=false) => {
   if(window.katex) {
     if(el instanceof Array) {
-      if(str instanceof String) {
-        el.forEach((e, i) => {
-          renderEl(str[i], e, displayMode, handleErr)
-        })
-      } else {
+      if(typeof str === "string") {
         el.forEach((e) => {
+          console.log(e)
           renderEl(str, e, displayMode, handleErr)
         })
+      } else {
+        el.forEach((e, i) => {
+          renderEl(str[i], e, displayMode, handleErr)
+        })
       }
     } else if(str && el) {
       renderEl(str, el, displayMode, handleErr)

docs/scripts/fourier.py

@@ -0,0 +1,4 @@
+from matplotlib import pyplot as plt
+arr = 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,0,1,6,22,0,1,8,29,12,14,10,4,3,6,3,10,2,29,14,7,1,1,3,4,7,2,9,35,51,17,12,3,14,1,12,13,12,5,13,9,0,16,16,14,12,4,13,9,43,13,8,2,10,2,11,2,3,2,6,0,9,6,3,1,0,0,0,3,7,7,9,18,10,4,2,7,1,1,0,5,3,19,23,13,12,0,8,2,2,3,12,19,6,15,4,4,2,8,5,0,0,4,1,2,10,0,12,5,5,2,4,17,16,6,7,11,1,6,10,0,1,14,15,1,61,43,23,24,6,8,3,17,3,26,15,39,28,22,9,5,9,0,2,5,4,1,6,10,6,0,4,0,2,2,3,1,2,3,1,3,1,1,0,4,5,7,2,6,32,20,3,6,2,3,0,11,9,12,1,1,7,10,1,10,1,6,5,10,1,15,8,10,0,3,1,5,2,0,1,31,48,16,6,5,7,0,9,5,20,6,7,4,3,4,14,5,6,1,15,12,34,13,40,16,8,6,10,1,3,4,7,0,3,4,6,4,1,0,0,0,3,2,17,32,13,2,6,6,1,3,4,6,6,22,27,10,8,2,3,0,5,4,18,27,5,18,20,6,4,12,3,1,3,7,0,0,13,1,11,4,2,0,2,7,11,20,40,23,4,10,11,4,4,13,5,10,51,46,14,16,2,3,4,15,7,32,33,29,14,37,1,8,15,0,2,4,7,0,0,3,5,5,0,0,0,0,4,4,13,27,12,1,6,5,1,2,7,3,6,26,34,13,9,1,3,2,6,1,20,25,10,12,22,6,4,12,2,1,3,7,0,0,7,3,8,1,1,0,1,6,7,14,31,17,2,8,8,3,2,11,2,8,40,43,15,13,3,3,3,11,2,27,28,21,10,29,3,5,14,1,2,3,6,0,1,3,3,7,0,1,1,0,5,6,11,26,13,1,6,6,2,1,10,0,7,33,41,16,11,4,3,3,9,0,23,25,17,8,25,4,4,13,1,1,3,5,0,4,1,3,7,0,1,2,0,6,6,6,19,11,0,6,5,2,0,12,3,6,33,45,20,11,7,2,5,9,3,23,21,18,2,24,5,3,13,1,0,0,1,1,0,0,1,1,2,1,0,1,0,1,0,9,12,1,0,2,1,1,3,1,9,5,7,2,4,0,2,1,0,2,7,5,7,0,21,11,0,3,2,0,0,1,0,0,3,1,0,1,0,0,0,1,2,1,3,6,0,1,1,0,1,1,3,6,5,3,3,2,2,0,2,1,1,4,4,2,0,17,9,0,2,2,0,0,1,0,0,1,0,1,1,0,0,0,0,2,1,6,9,0,0,1,0,1,2,1,8,5,2,1,4,2,1,1,0,1,5,3,5,2,19,9,1,2,2,0,0,1,0,0,0,0,1,0,0,0,1,0,3,2,6,11,0,0,1,0,1,2,0,9,5,1,0,5,3,2,1,0,0,5,2,5,5,20,7,2,2,2,0,0,1,0,0,0,0,1,1,0,0,0,0,2,1,7,10,1,0,1,0,1,2,1,8,5,2,1,4,1,2,1,0,0,6,3,5,2,20,9,1,2,2,0,0,1,1,0,0,0,1,0,0,0,1,0,3,1,7,11,1,0,1,0,1,3,0,9,5,0,0,5,2,2,1,0,0,6,2,6,4,20,8,1,2,2,0,0,1,1,0,0,0,1,0,0,0,1,0,2,1,7,11,1,0,1,0,1,3,0,9,5,1,0,5,2,2,1,0,0,6,3,6,3,21,9,1,2,2,0,0,1,1,0,0,0,1,0,0,0,1,0,2,1,8,12,1,0,1,0,1,3,0,9,5,2,0,5,1,3,1,0,0,7,3,7,3,21,9,1,2,2,0,0,1,0,0,4,7,3,0,0,1,0,0,0,0,1,3,7,3,0,1,0,0,0,0,0,3,7,6,2,1,1,1,0,1,0,3,3,6,1,1,1,1,1,2,1,2,0,2,0,5,1,1,0,3,1,4,7,9,10,2,0,0,2,0,2,3,12,5,12,16,8,6,7,2,1,2,8,3,3,11,30,3,0,5,0,0,1,1,2,0,0,0,2,0,0,0,1,0,2,2,7,11,3,0,1,0,0,2,0,8,4,0,0,1,1,2,0,0,0,5,1,7,3,20,6,2,3,1,0,0,0,2,0,3,6,0,2,0,1,1,0,3,1,11,25,12,4,4,4,3,5,1,11,7,7,8,2,1,1,1,0,2,8,9,15,4,21,13,4,3,4,1,0,1,1,0,0,0,1,1,0,0,1,0,1,0,6,11,3,0,1,0,1,2,0,7,4,2,4,0,0,1,0,0,0,4,3,8,1,17,7,2,3,2,0,0,1,2,0,1,3,0,2,0,0,1,0,2,0,8,17,7,2,3,2,2,3,1,8,5,6,8,0,1,1,0,0,1,6,6,12,2,18,10,3,3,3,0,0,1,1,0,0,1,1,1,0,0,0,0,1,0,7,13,4,1,2,1,2,2,1,6,4,5,8,1,1,0,0,0,1,4,5,10,1,15,8,3,2,3,0,0,1,1,0,0,0,0,2,0,0,0,0,1,1,6,11,3,0,2,2,2,2,2,4,3,8,11,3,3,0,0,1,1,3,5,10,2,12,8,3,2,3,0,1,4,2,6,3,33,12,6,6,2,5,9,6,13,0,47,60,8,12,1,10,1,22,25,40,1,16,34,32,0,29,7,16,14,36,8,37,41,62,1,10,1,2,9,4,3,0,1,3,25,2,26,19,12,2,10,15,27,39,28,11,3,12,20,1,13,18,11,7,108,25,2,36,8,9,2,30,34,33,23,57,25,51,33,24,5,2,1,1,0,0,0,8,0,8,7,4,1,3,1,7,17,14,2,0,4,6,1,7,4,11,5,32,1,8,9,6,1,0,9,17,9,8,14,24,19,11,10,0,2,4,2,7,1,27,12,5,3,1,3,4,6,1,6,29,40,11,11,1,11,1,12,16,13,6,0,6,7,10,17,11,12,7,14,0,31,18,9,6,8,2,5,1,1,0,0,0,0,3,0,3,3,1,1,1,2,1,11,10,0,0,1,2,1,5,0,11,4,10,6,9,1,5,0,0,3,12,2,4,1,23,10,5,5,0,1,2,0,3,0,12,5,2,1,0,1,1,3,2,4,10,15,6,5,0,5,1,3,6,0,5,4,3,2,7,5,7,5,2,2,2,14,3,8,4,3,2,3,0,1,0,1,0,4,2,0,0,0,0,0,1,4,3,0,1,3,2,0,2,1,1,0,7,4,6,9,8,6,1,4,1,0,4,3,4,4,18,3,1,2,2,1,0,0,1,0,1,4,0,4,2,2,1,2,8,7,1,3,4,0,1,4,1,2,5,11,3,24,17,12,11,4,4,1,6,5,9,2,18,23,4,4,0,2,0,1,3,2,1,5,8,4,0,2,0,1,1,1,1,0,0,5,3,0,1,0,1,3,3,0,4,18,12,2,3,2,2,0,5,3,7,2,3,3,5,0,5,0,4,2,6,0,7,3,7,0,2,0,4,0,2,5,18,26,8,2,2,1,0,5,4,16,6,4,8,6,2,10,0,3,2,11,3,16,12,35,8,4,5,4,0,2,2,4,0,1,2,4,2,0,0,1,0,0,0,11,20,7,1,3,2,1,3,1,8,5,8,11,3,2,2,1,0,2,5,8,15,0,20,12,4,4,6,1,0,1,5,0,2,9,0,6,2,0,1,1,1,5,15,32,17,4,7,7,4,5,6,9,8,25,24,4,7,0,0,2,7,8,19,23,14,19,23,3,5,9,0,1,2,4,0,0,1,3,2,0,0,0,0,0,1,9,18,7,1,3,3,1,2,3,5,5,12,16,5,4,0,1,1,3,3,10,15,3,15,13,4,3,6,0,0,2,4,0,0,4,1,4,1,0,0,0,1,3,11,24,11,2,5,5,2,3,5,6,6,20,23,6,6,0,0,2,5,5,15,19,10,15,18,3,4,8,0,1,2,3,0,0,2,2,4,0,0,0,0,1,2,9,19,8,1,4,3,2,2,5,4,5,17,22,7,5,1,1,2,4,3,13,16,7,13,16,4,3,7,0,0,2,3,0,2,]
+plt.plot(arr)
+plt.show()

include/APU.h

@@ -35,7 +35,8 @@ class APU
 
 private:
     AudioStat *stat;
-	int driver_id; // SDL audio device driver
+  	int driver_id; // SDL audio device driver
     u64 ticks;
     u64 ticks_until_next_buffer = 0;
-};
+};
+