3 files changed, 307 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..470d88b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,186 @@
+# Created by .ignore support plugin (hsz.mobi)
+
+### C++ template
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+
+### Vim template
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+*.un~
+Session.vim
+.netrwhist
+*~
+
+
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm
+
+*.iml
+
+## Directory-based project format:
+.idea/
+# if you remove the above rule, at least ignore the following:
+
+# User-specific stuff:
+# .idea/workspace.xml
+# .idea/tasks.xml
+# .idea/dictionaries
+
+# Sensitive or high-churn files:
+# .idea/dataSources.ids
+# .idea/dataSources.xml
+# .idea/sqlDataSources.xml
+# .idea/dynamic.xml
+# .idea/uiDesigner.xml
+
+# Gradle:
+# .idea/gradle.xml
+# .idea/libraries
+
+# Mongo Explorer plugin:
+# .idea/mongoSettings.xml
+
+## File-based project format:
+*.ipr
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+
+
+### Python template
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+
+### C template
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+
+
diff --git a/arduino/fht_test.ino b/arduino/fht_test.ino
new file mode 100644
index 0000000..0e2f83c
--- /dev/null
+++ b/arduino/fht_test.ino
@@ -0,0 +1,68 @@
+
+// FHT Options
+#define FHT_N 256
+#define SCALE 256
+#define WINDOW 1
+#define REORDER 1
+#define LOG_OUT 1
+#define LIN_OUT 0
+#define LIN_OUT8 0
+#define OCTAVE 0
+#define OCT_NORM 0
+
+#define BINS 128
+
+#include <FHT.h>
+
+void aquire_data() {
+  noInterrupts();
+
+  for (int i = 0; i < FHT_N; i++) {
+    while(!(ADCSRA & 0x10)); // wait for adc to be ready
+    ADCSRA = 0xf5; // restart adc
+    byte m = ADCL; // fetch adc data
+    byte j = ADCH;
+    int k = (j << 8) | m; // form into an int
+    k -= 0x0200;      // form into a signed int
+    k <<= 6;          // form into a 16b signed int
+    fht_input[i] = k; // put real data into bins
+  }
+
+  interrupts();
+}
+
+void crunch_data() {
+  fht_window();
+  fht_reorder();
+  fht_run();
+  //fht_mag_octave();
+  fht_mag_log();
+}
+
+void setup() {
+
+  Serial.begin(115200);
+
+  TIMSK0 = 0;    // turn off timer0 for lower jitter
+  ADCSRA = 0xe5; // set the adc to free running mode
+  ADMUX = 0x40;  // use adc0
+  DIDR0 = 0x01;  // turn off the digital input for adc0
+
+}
+
+char buf[2550] = "";
+
+void loop() {
+  aquire_data();
+  crunch_data();
+  
+  for (int i = 0; i < BINS; i++) {
+    Serial.print(fht_log_out[i]);
+    Serial.print(' ');
+  }
+  
+  Serial.print('\n');
+  
+  delay(10000);
+}
+
diff --git a/visualizer/visualizer.py b/visualizer/visualizer.py
new file mode 100644
index 0000000..ed65384
--- /dev/null
+++ b/visualizer/visualizer.py
@@ -0,0 +1,53 @@
+
+BINS = 128
+
+
+import serial
+
+s = serial.Serial("/dev/ttyACM0", 115200)
+
+
+def acquire_data():
+
+    nb_val = 0
+    while nb_val != BINS+1:
+        l = s.readline()
+        d = l.decode("utf8")
+        v = d.split(' ')
+        nb_val = len(v)
+
+    n = [0] * BINS
+    for i in range(BINS):
+        try:
+            n[i