From 31aa8beefbbc9dfa4d58d572b3b7941a4428004e Mon Sep 17 00:00:00 2001
From: Jay Robson <jsrobson10@gmail.com>
Date: Sun, 25 Aug 2024 18:22:48 +1000
Subject: [PATCH] added indicator LED

---
 indicator.cpp      | 19 +++++++++++++++++++
 indicator.hpp      |  9 +++++++++
 tone-generator.ino |  6 +++++-
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 indicator.cpp
 create mode 100644 indicator.hpp

diff --git a/indicator.cpp b/indicator.cpp
new file mode 100644
index 0000000..08e4e70
--- /dev/null
+++ b/indicator.cpp
@@ -0,0 +1,19 @@
+
+#include <Arduino.h>
+#include "indicator.hpp"
+#include "tones.hpp"
+
+#define LED_INDICATOR 10
+
+void indicator::init() {
+	pinMode(LED_INDICATOR, OUTPUT);
+}
+
+void indicator::update() {
+    float v = 0;
+    for(int i = 0; i < tones::active; i++) {
+      v += tones::all[i].amplitude;
+    }
+    analogWrite(LED_INDICATOR, min((int)(v * 256), 255));
+}
+
diff --git a/indicator.hpp b/indicator.hpp
new file mode 100644
index 0000000..7dcc8fd
--- /dev/null
+++ b/indicator.hpp
@@ -0,0 +1,9 @@
+
+#pragma once
+
+namespace indicator {
+
+	void init();
+	void update();
+};
+
diff --git a/tone-generator.ino b/tone-generator.ino
index cd80a47..18d71f8 100644
--- a/tone-generator.ino
+++ b/tone-generator.ino
@@ -5,8 +5,10 @@
 #include "timing.hpp"
 #include "util.hpp"
 #include "scheduler.hpp"
+#include "indicator.hpp"
 
-unsigned long int micros_at = 0;
+static unsigned long int micros_at = 0;
+static bool led_state = true;
 
 inline unsigned long micros_diff() {
 	unsigned long now = micros();
@@ -19,11 +21,13 @@ void setup() {
 	dac::init();
   tones::init();
   scheduler::init();
+  indicator::init();
 }
 
 void loop() {
   if(scheduler::running && timing::at >= scheduler::timestamp) {
     scheduler::do_all();
+    indicator::update();
   }
 
   timing::update();