Enable/Disable LED from preferences file

USBNova.ino

@@ -11,6 +11,7 @@
 #include "src/msc/msc.h"
 #include "src/selector/selector.h"
 #include "src/attack/attack.h"
+#include "src/preferences/preferences.h"
 
 enum Mode {
     SETUP, ATTACK
@@ -19,23 +20,18 @@ enum Mode {
 Mode mode;
 
 void setup() {
+    // Initialize all the things
     debug_init();
-    debugln("Started");
-
     msc::init();
     keyboard::init();
     selector::init();
     led::init();
+    preferences::load();
 
-    /*
-       // Wait until Serial Monitor was opened
-       while (!Serial) {
-        delay(1);
-       }
-     */
-
-    debugln("[Started]");
+    // Preferences
+    led::setEnable(preferences::ledEnabled());
 
+    // Start doing the work
     mode = selector::read() ? SETUP : ATTACK;
 
     // ==========  Setup Mode ==========  //
@@ -49,7 +45,7 @@ void setup() {
 
                 if (mode == ATTACK) {
                     led::setColor(255, 0, 0); // Turn LED red
-                    attack::start();           // Start attack
+                    attack::start();          // Start attack
                     led::setColor(0, 255, 0); // Turn LED green
                     mode = SETUP;
                 }

src/led/led.cpp

@@ -47,6 +47,14 @@ namespace led {
         led.show();
     }
 
+    void setEnable(bool enabled) {
+        if (enabled) {
+            led.setBrightness(255);
+        } else {
+            led.setBrightness(0);
+        }
+    }
+
     void setColor(int r, int g, int b) {
         for (size_t i = 0; i<led.numPixels(); i++) {
             led.setPixelColor(i, r, g, b);

src/led/led.h

@@ -6,6 +6,7 @@
 
 namespace led {
     void init();
+    void setEnable(bool enabled);
     void setColor(int r, int g, int b);
     void start_blink(uint8_t r, uint8_t g, uint8_t b, unsigned long intv);
     void stop_blink();

src/msc/msc.cpp

@@ -98,7 +98,7 @@ namespace msc {
         }
 
         // If a file is already open, close it
-        if(file.isOpen()) file.close();
+        if (file.isOpen()) file.close();
 
         // Create a new file element and push it to the stack
         file_element_t file_element;
@@ -125,11 +125,11 @@ namespace msc {
         debugln(file_stack.size());
 
         // If stack is now empty, we're done
-        if (file_stack.empty()){
+        if (file_stack.empty()) {
             debugln("Stack is empty");
             return false;
         }
-        
+
         debugln(file_stack.top().path.c_str());
 
         // Get the next file from the stack
@@ -157,12 +157,16 @@ namespace msc {
         file.seekSet(pos);
     }
 
+    size_t read(char* buffer, size_t len) {
+        return file.read(buffer, len);
+    }
+
     size_t readLine(char* buffer, size_t len) {
         size_t read { 0 };
 
         // Read as long as the file has data and buffer is not full
         // -1 to compensate for a extra linebreak at the end of the file
-        while(file.isOpen() && file.available() > 0 && read < len-1) {
+        while (file.isOpen() && file.available() > 0 && read < len-1) {
             // Read character by character
             char c = file.read();
 

src/msc/msc.h

@@ -13,6 +13,7 @@ namespace msc {
     uint32_t getPosition();
     void gotoPosition(uint32_t pos);
 
+    size_t read(char* buffer, size_t len);
     size_t readLine(char* buffer, size_t len);
     bool getInLine();
 }

src/preferences/preferences.cpp

@@ -0,0 +1,65 @@
+/* This software is licensed under the MIT License: https://github.com/spacehuhntech/usbnova */
+
+#include "preferences.h"
+
+#include "../../config.h"
+#include "../../debug.h"
+
+#include <ArduinoJson.h>
+
+namespace preferences {
+    // ========== PRIVATE ========= //
+    StaticJsonDocument<256> config_doc;
+
+    bool enable_msc;
+    bool enable_led;
+    std::string vid;
+    std::string pid;
+    std::string default_layout;
+
+    // ======== PUBLIC ======== //
+    void load() {
+        // Read config file
+        char buffer[256];
+
+        msc::open("preferences.json");
+        msc::read(buffer, sizeof(buffer));
+
+        // Deserialize the JSON document
+        DeserializationError error = deserializeJson(config_doc, json);
+
+        // Test if parsing succeeds.
+        if (error) {
+            debug("deserializeJson() failed: ");
+            debugln(error.f_str());
+            return;
+        }
+
+        // Fetch values.
+        enable_msc     = config_doc["enable_msc"];
+        enable_led     = config_doc["enable_led"];
+        vid            = config_doc["vid"];
+        pid            = config_doc["pid"];
+        default_layout = config_doc["default_layout"];
+    }
+
+    bool mscEnabled() {
+        return enable_msc;
+    }
+
+    bool ledEnabled() {
+        return enable_led;
+    }
+
+    std::string getVid() {
+        return vid;
+    }
+
+    std::string getPid() {
+        return pid;
+    }
+
+    std::string getDefaultLayout() {
+        return default_layout;
+    }
+}

src/preferences/preferences.h

@@ -0,0 +1,15 @@
+/* This software is licensed under the MIT License: https://github.com/spacehuhntech/usbnova */
+
+#pragma once
+
+#include <string>
+
+namespace preferences {
+    void load();
+
+    bool mscEnabled();
+    bool ledEnabled();
+    std::string getVid();
+    std::string getPid();
+    std::string getDefaultLayout();
+}