From 02aea42207469c430f94b924cbf6de2f4d2d94a6 Mon Sep 17 00:00:00 2001
From: Thomas Schmid <tom@binary-kitchen.de>
Date: Sun, 26 Jun 2022 00:23:50 +0200
Subject: [PATCH] add acceleration sensor

Signed-off-by: Thomas Schmid <tom@binary-kitchen.de>
---
 firmware/include/zauberstab.h | 11 +++++++++--
 firmware/platformio.ini       |  4 +++-
 firmware/src/zauberstab.cpp   | 26 ++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/firmware/include/zauberstab.h b/firmware/include/zauberstab.h
index 57a875b..ae449e2 100644
--- a/firmware/include/zauberstab.h
+++ b/firmware/include/zauberstab.h
@@ -2,12 +2,19 @@
 
 #include "Arduino.h"
 #include <FastLED.h>
+#include<Wire.h>
+#include<ADXL345_WE.h>
+
+#define ADXL345_I2CADDR 0x53  // 0x1D if SDO = HIGH
 
 #define LED_PIN 12
-#define NUM_LEDS 144
+#define NUM_LEDS 48
 #define MIC_PIN 15
 
 extern CRGB leds[NUM_LEDS];
+extern ADXL345_WE myAcc;
 
 int zauberstab_init();
-float get_sample();
\ No newline at end of file
+float get_sample();
+void switch_app();
+bool acc_has_event();
\ No newline at end of file
diff --git a/firmware/platformio.ini b/firmware/platformio.ini
index 22305b5..ad2ded7 100644
--- a/firmware/platformio.ini
+++ b/firmware/platformio.ini
@@ -10,7 +10,9 @@
 
 [env]
 framework = arduino
-lib_deps = fastled/FastLED @ ^3.5.0
+lib_deps = 
+    fastled/FastLED @ ^3.5.0
+    wollewald/ADXL345_WE @ ^2.1.4
 
 [env:esp32doit-devkit-v1]
 platform = espressif32
diff --git a/firmware/src/zauberstab.cpp b/firmware/src/zauberstab.cpp
index 51a3489..c65e1bb 100644
--- a/firmware/src/zauberstab.cpp
+++ b/firmware/src/zauberstab.cpp
@@ -4,16 +4,42 @@
 DcCancelation<float> dc_blocker{0.95};
 CRGB leds[NUM_LEDS];
 static int16_t mic_offset = 0;
+static bool acc_event = false;
+ADXL345_WE myAcc = ADXL345_WE(ADXL345_I2CADDR);
 
 static uint16_t read_mic()
 {
     return analogRead(MIC_PIN);
 }
 
+void double_tab_int() {
+    acc_event = true;
+}
+
+bool acc_has_event() {
+    return acc_event;
+}
+
 int zauberstab_init()
 {
     FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
+    FastLED.addLeds<WS2812, 14, GRB>(leds, NUM_LEDS);
+    FastLED.addLeds<WS2812, 27, GRB>(leds, NUM_LEDS);
     // FastLED.setMaxPowerInVoltsAndMilliamps(5, 300);
+
+    Wire.begin();
+    if (!myAcc.init()){
+        Serial.println("Ooops, no ADXL345 detected ... Check your wiring!");
+        return -1;
+    }
+
+    myAcc.setDataRate(ADXL345_DATA_RATE_200);
+    myAcc.setRange(ADXL345_RANGE_8G);
+    myAcc.setGeneralTapParameters(ADXL345_XY0, 3.0, 30, 100.0);
+    myAcc.setAdditionalDoubleTapParameters(false, 250);
+    myAcc.setInterrupt(ADXL345_DOUBLE_TAP, INT_PIN_1);
+    attachInterrupt(digitalPinToInterrupt(4), double_tab_int, RISING);
+
     return 0;
 }