CITS Sniffer v2: ESP-IDF 5.5 Projektstruktur mit CMakeLists, sdkconfig, partitions_8M

2026-05-18 14:19:34 +02:00
parent 657b2bc1ea
commit 9c1732c364
9 changed files with 5352 additions and 0 deletions
@@ -0,0 +1,163 @@
+/**
+ * Block 3: CSV Writer für C-ITS Sniffer
+ * 
+ * Erstellt CSV-Dateien mit empfangenen C-ITS Nachrichten
+ * Neue Datei alle 10 Minuten
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <time.h>
+
+#include "sdkconfig.h"
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp_vfs_fat.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+static const char *TAG = "CSV_WRITER";
+
+// CSV Datei Handle
+static FILE *csv_file = NULL;
+static char current_filename[64];
+static time_t last_write_time = 0;
+#define CSV_WRITE_INTERVAL_SEC (600)  // 10 Minuten
+
+/**
+ * C-ITS Message Header (BSI Format)
+ */
+typedef struct {
+    uint32_t timestamp_sec;
+    uint32_t timestamp_usec;
+    uint16_t length;
+    uint8_t sender_id[6];      // MAC Address
+    uint8_t message_type;      // BSI Message Type
+    uint8_t channel;          // Kanal
+    int16_t rssi;             // Signal Stärke
+} cits_message_t;
+
+/**
+ * CSV Header schreiben
+ */
+static void write_csv_header(FILE *fp)
+{
+    fprintf(fp, "timestamp_sec,timestamp_usec,length,sender_mac,message_type,channel,rssi\n");
+}
+
+/**
+ * CSV Zeile schreiben
+ */
+static void write_csv_row(FILE *fp, cits_message_t *msg)
+{
+    char mac_str[18];
+    snprintf(mac_str, sizeof(mac_str), "%02x:%02x:%02x:%02x:%02x:%02x",
+             msg->sender_id[0], msg->sender_id[1], msg->sender_id[2],
+             msg->sender_id[3], msg->sender_id[4], msg->sender_id[5]);
+    
+    fprintf(fp, "%u,%u,%u,%s,%u,%u,%d\n",
+            msg->timestamp_sec, msg->timestamp_usec, msg->length,
+            mac_str, msg->message_type, msg->channel, msg->rssi);
+}
+
+/**
+ * Neue CSV-Datei erstellen
+ */
+static esp_err_t create_new_csv_file(void)
+{
+    time_t now;
+    struct tm *tm_info;
+    
+    time(&now);
+    tm_info = localtime(&now);
+    
+    // Dateinamen mit Zeitstempel
+    snprintf(current_filename, sizeof(current_filename), 
+             "/data/cits_%04d%02d%02d_%02d%02d%02d.csv",
+             tm_info->tm_year + 1900, tm_info->tm_mon + 1, tm_info->tm_mday,
+             tm_info->tm_hour, tm_info->tm_min, tm_info->tm_sec);
+    
+    if (csv_file != NULL) {
+        fclose(csv_file);
+    }
+    
+    csv_file = fopen(current_filename, "w");
+    if (csv_file == NULL) {
+        ESP_LOGE(TAG, "Failed to create CSV file: %s", current_filename);
+        return ESP_FAIL;
+    }
+    
+    write_csv_header(csv_file);
+    fflush(csv_file);
+    
+    ESP_LOGI(TAG, "Created new CSV file: %s", current_filename);
+    return ESP_OK;
+}
+
+/**
+ * Prüfen ob neue Datei nötig (10 Minuten Intervall)
+ */
+static void check_new_csv_file(void)
+{
+    time_t now;
+    time(&now);
+    
+    if (difftime(now, last_write_time) >= CSV_WRITE_INTERVAL_SEC) {
+        create_new_csv_file();
+        last_write_time = now;
+    }
+}
+
+/**
+ * C-ITS Nachricht speichern
+ * 
+ * @param msg Nachricht Daten
+ */
+void csv_store_cits_message(cits_message_t *msg)
+{
+    if (csv_file == NULL) {
+        create_new_csv_file();
+        if (csv_file == NULL) {
+            return;
+        }
+    }
+    
+    check_new_csv_file();
+    write_csv_row(csv_file, msg);
+    fflush(csv_file);
+}
+
+/**
+ * CSV System initialisieren
+ */
+esp_err_t csv_writer_init(void)
+{
+    // SPI Flash Filesystem mounten
+    static wl_handle_t wl_handle;
+    const esp_vfs_fat_mount_config_t mount_config = {
+        .max_files = 4,
+        .format_if_mount_failed = true
+    };
+    
+    esp_err_t ret = esp_vfs_fat_spiflash_mount_rw_wl("/data", "storage", &mount_config, &wl_handle);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to mount FATFS (%s)", esp_err_to_name(ret));
+        return ret;
+    }
+    
+    // Erste CSV Datei erstellen
+    return create_new_csv_file();
+}
+
+/**
+ * CSV System beenden
+ */
+void csv_writer_deinit(void)
+{
+    if (csv_file != NULL) {
+        fclose(csv_file);
+        csv_file = NULL;
+    }
+}