Bind key initialized and loaded from EEPROM

crossbow/crossbow.ino

@@ -15,6 +15,7 @@ Copyright (c) 20xx, MPL Contributor1 contrib1@example.net
 #include "qsp.h"
 #include "sbus.h"
 #include "platform_node.h"
+#include "platform_config.h"
 
 #ifdef ARDUINO_AVR_FEATHER32U4
     #define LORA_SS_PIN     8
@@ -36,6 +37,7 @@ Copyright (c) 20xx, MPL Contributor1 contrib1@example.net
 
 RadioNode radioNode;
 PlatformNode platformNode;
+PlatformConfig platformConfig;
 
 /*
  * Main defines for device working in TX mode
@@ -176,6 +178,8 @@ void setup(void)
 
 #ifdef DEVICE_MODE_TX
 
+    platformConfig.seed();
+
 #ifdef FEATURE_TX_OLED
     oled.init();
     oled.page(TX_PAGE_INIT);
@@ -206,14 +210,7 @@ void setup(void)
 
     pinMode(LED_BUILTIN, OUTPUT);
 
-    /*
-     * Setup salt bind key
-     */
-    platformNode.bindKey[0] = 0x12;
-    platformNode.bindKey[1] = 0x0a;
-    platformNode.bindKey[2] = 0x36;
-    platformNode.bindKey[3] = 0xa7;
-
+    platformConfig.loadBindKey();
 }
 
 uint8_t currentSequenceIndex = 0;

crossbow/platform_config.cpp

@@ -0,0 +1,27 @@
+#include "platform_config.h"
+#include "Arduino.h"
+
+PlatformConfig::PlatformConfig(void) {
+    randomSeed(analogRead(0));
+};
+
+void PlatformConfig::seed(void) {
+    uint8_t val;
+
+    val = EEPROM.read(EEPROM_ADDRESS_BIND_KEY_SEEDED);
+
+    if (val != 0xf1) {
+        EEPROM.write(EEPROM_ADDRESS_BIND_0, random(1, 255)); //Yes, from 1 to 254
+        EEPROM.write(EEPROM_ADDRESS_BIND_1, random(1, 255)); //Yes, from 1 to 254
+        EEPROM.write(EEPROM_ADDRESS_BIND_2, random(1, 255)); //Yes, from 1 to 254
+        EEPROM.write(EEPROM_ADDRESS_BIND_3, random(1, 255)); //Yes, from 1 to 254
+        EEPROM.write(EEPROM_ADDRESS_BIND_KEY_SEEDED, 0xf1);
+    }
+}
+
+void PlatformConfig::loadBindKey(void) {
+    platformNode.bindKey[0] = EEPROM.read(EEPROM_ADDRESS_BIND_0);
+    platformNode.bindKey[1] = EEPROM.read(EEPROM_ADDRESS_BIND_1);
+    platformNode.bindKey[2] = EEPROM.read(EEPROM_ADDRESS_BIND_2);
+    platformNode.bindKey[3] = EEPROM.read(EEPROM_ADDRESS_BIND_3);
+}

crossbow/platform_config.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#ifndef PLATFORM_CONFIG_H
+#define PLATFORM_CONFIG_H
+
+#include <EEPROM.h>
+#include "platform_node.h"
+
+extern PlatformNode platformNode;
+
+enum platformConfigMemoryLayout {
+    EEPROM_ADDRESS_BIND_KEY_SEEDED = 0x00,
+    EEPROM_ADDRESS_BIND_0,
+    EEPROM_ADDRESS_BIND_1,
+    EEPROM_ADDRESS_BIND_2,
+    EEPROM_ADDRESS_BIND_3,
+    PLATFORM_CONFIG_LAST_BYTE
+};
+
+class PlatformConfig {
+    public:
+        PlatformConfig(void);
+        void seed(void);
+        void loadBindKey();
+};
+
+#endif