From f1629b7327e752271df45a2c62a496433218396d Mon Sep 17 00:00:00 2001
From: Maksym <maksimgrs98@gmail.com>
Date: Sun, 8 Dec 2024 19:10:39 +0100
Subject: [PATCH] added limit to maximum value of button added basic LED
 support

---
 platformio.ini |  3 ++-
 src/main.cpp   | 40 ++++++++++++++++++++++++++++++++++------
 2 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 8123751..d966ae7 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,4 +13,5 @@ platform = raspberrypi
 board = adafruit_kb2040
 framework = arduino
 upload_protocol = picotool
-monitor_speed = 115200
\ No newline at end of file
+monitor_speed = 115200
+lib_deps = fastled/FastLED@^3.9.4
diff --git a/src/main.cpp b/src/main.cpp
index 5d37e91..cab84d4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,10 +2,14 @@
 #include <pico.h>
 #include <hardware/pwm.h>
 #include <Keyboard.h>
+#include <FastLED.h>
 
 #define PORT 2
 #define PORT2 3
 #define THRESHOLD 10
+#define LEDPORT 5
+
+CRGB leds[2];
 
 class HallButton
 {
@@ -15,14 +19,18 @@ public:
   uint64_t firstPulseLength[3]; // value of button
   int64_t value;
   uint64_t _median;
+  int64_t maxValue;
+  bool isFirstClick = true;
   bool isDataReadyToRead = false;
   bool isButtonPressed = false;
   uint64_t nextTogglePoint = 0; // value when to toggle state of button
+  size_t ledId;
 
-  HallButton(uint8_t gpioNum, char buttonOnKeyboard)
+  HallButton(uint8_t gpioNum, char buttonOnKeyboard, size_t ledId)
   {
     this->gpioNum = gpioNum;
     this->buttonOnKeyboard = buttonOnKeyboard;
+    this->ledId = ledId;
   }
 
   void HandleISR(bool gpioState, uint64_t currentTime)
@@ -45,13 +53,19 @@ public:
       return;
     _median = median(firstPulseLength[0], firstPulseLength[1], firstPulseLength[2]);
     value = filtered((float)_median);
-    if (nextTogglePoint == 0)
-      nextTogglePoint = value + THRESHOLD;
+    if (value > maxValue)
+      if (isFirstClick)
+        maxValue = value;
+      else
+        value = maxValue;
+
     if (isButtonPressed)
     {
       if (value < nextTogglePoint)
       {
         Release();
+        if (isFirstClick)
+          isFirstClick = false;
       }
       if ((int64_t)value - (int64_t)nextTogglePoint > THRESHOLD)
         nextTogglePoint = value - THRESHOLD;
@@ -94,6 +108,7 @@ private:
       return;
     Keyboard.press(buttonOnKeyboard);
     isButtonPressed = true;
+    LEDTick(isButtonPressed, ledId);
   }
   void Release()
   {
@@ -101,10 +116,16 @@ private:
       return;
     Keyboard.release(buttonOnKeyboard);
     isButtonPressed = false;
+    LEDTick(isButtonPressed, ledId);
+  }
+  static void LEDTick(bool status, size_t ledId)
+  {
+    leds[ledId] = status ? CRGB::Red : CRGB::Black;
+    FastLED.show();
   }
 };
 
-HallButton btn[2] = {HallButton(PORT, 't'), HallButton(PORT2, 'y')};
+HallButton btn[2] = {HallButton(PORT, 't', 1), HallButton(PORT2, 'y', 0)};
 
 void isr(uint gpio, uint32_t events)
 {
@@ -133,12 +154,19 @@ void setup()
   gpio_set_irq_enabled_with_callback(PORT2, GPIO_IRQ_EDGE_RISE | GPIO_IRQ_EDGE_FALL, true, isr);
   // Serial.begin(9600);
   Keyboard.begin();
+  FastLED.addLeds<NEOPIXEL, LEDPORT>(leds, 2);
 }
 
 void printDebugInfo()
 {
-  Serial.printf("%llu,%llu,%llu,%llu,%i,", btn[0].firstPulseLength[btn[0].counter], btn[0]._median, btn[0].value, btn[0].nextTogglePoint, btn[0].isButtonPressed);
-  Serial.printf("%llu,%llu,%llu,%llu,%i\n", btn[1].firstPulseLength[btn[1].counter], btn[1]._median, btn[1].value, btn[1].nextTogglePoint, btn[1].isButtonPressed);
+  static uint32_t lastTime = 0;
+  uint32_t time = millis();
+  if (time - lastTime >= 1)
+  {
+    Serial.printf("%d,%d,%llu,%llu,%i,", btn[0].isFirstClick, btn[0].maxValue, btn[0].value, btn[0].nextTogglePoint, btn[0].isButtonPressed);
+    Serial.printf("%d,%d,%llu,%llu,%i\n", btn[1].isFirstClick, btn[1].maxValue, btn[1].value, btn[1].nextTogglePoint, btn[1].isButtonPressed);
+    lastTime = time;
+  }
 }
 void loop()
 {