Added Device Profiles

Allows the pin assignment during runtime.
Pin settings will be read from a json file called "pin_mapping.json"

src/PinMapping.cpp

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2022 - 2023 Thomas Basler and others
+ */
+#include "PinMapping.h"
+#include "MessageOutput.h"
+#include <ArduinoJson.h>
+#include <LittleFS.h>
+#include <string.h>
+
+#define JSON_BUFFER_SIZE 6144
+
+PinMappingClass PinMapping;
+
+PinMappingClass::PinMappingClass()
+{
+    memset(&_pinMapping, 0x0, sizeof(_pinMapping));
+    _pinMapping.nrf24_clk = HOYMILES_PIN_SCLK;
+    _pinMapping.nrf24_cs = HOYMILES_PIN_CS;
+    _pinMapping.nrf24_en = HOYMILES_PIN_CE;
+    _pinMapping.nrf24_irq = HOYMILES_PIN_IRQ;
+    _pinMapping.nrf24_miso = HOYMILES_PIN_MISO;
+    _pinMapping.nrf24_mosi = HOYMILES_PIN_MOSI;
+}
+
+PinMapping_t& PinMappingClass::get()
+{
+    return _pinMapping;
+}
+
+
+bool PinMappingClass::init(const String& deviceMapping)
+{
+    File f = LittleFS.open(PINMAPPING_FILENAME, "r", false);
+
+    if (!f) {
+        return false;
+    }
+
+    DynamicJsonDocument doc(JSON_BUFFER_SIZE);
+    // Deserialize the JSON document
+    DeserializationError error = deserializeJson(doc, f);
+    if (error) {
+        MessageOutput.println(F("Failed to read file, using default configuration"));
+    }
+
+    for (uint8_t i = 1; i <= doc.size(); i++) {
+        String devName = doc[i]["name"] | "";
+        if (devName == deviceMapping) {
+            strlcpy(_pinMapping.name, devName.c_str(), sizeof(_pinMapping.name));
+            _pinMapping.nrf24_clk = doc[i]["nrf24"]["clk"] | HOYMILES_PIN_SCLK;
+            _pinMapping.nrf24_cs = doc[i]["nrf24"]["cs"] | HOYMILES_PIN_CS;
+            _pinMapping.nrf24_en = doc[i]["nrf24"]["en"] | HOYMILES_PIN_CE;
+            _pinMapping.nrf24_irq = doc[i]["nrf24"]["irq"] | HOYMILES_PIN_IRQ;
+            _pinMapping.nrf24_miso = doc[i]["nrf24"]["miso"] | HOYMILES_PIN_MISO;
+            _pinMapping.nrf24_mosi = doc[i]["nrf24"]["mosi"] | HOYMILES_PIN_MOSI;
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool PinMappingClass::isValidNrf24Config()
+{
+    return _pinMapping.nrf24_clk > 0
+        && _pinMapping.nrf24_cs > 0
+        && _pinMapping.nrf24_en > 0
+        && _pinMapping.nrf24_irq > 0
+        && _pinMapping.nrf24_miso > 0
+        && _pinMapping.nrf24_mosi > 0;
+}