Added CRC8, implemented testing sample

firmware/apps/_samples/utils/.gitignore

@@ -0,0 +1 @@
+build*/

firmware/apps/_samples/utils/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.20.0)
+
+# Tell Zephyr to look into our libs folder for extra modules
+list(APPEND ZEPHYR_EXTRA_MODULES ${CMAKE_CURRENT_SOURCE_DIR}/../../../libs)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+project(_mcumgr)
+
+target_sources(app PRIVATE src/main.c)

firmware/apps/_samples/utils/nrf52840dk_nrf52840.overlay

@@ -0,0 +1,44 @@
+// To get started, press Ctrl+Space (or Option+Esc) to bring up the completion menu and view the available nodes.
+
+// You can also use the buttons in the sidebar to perform actions on nodes.
+// Actions currently available include:
+
+// * Enabling / disabling the node
+// * Adding the bus to a bus
+// * Removing the node
+// * Connecting ADC channels
+
+// For more help, browse the DeviceTree documentation at https://docs.zephyrproject.org/latest/guides/dts/index.html
+// You can also visit the nRF DeviceTree extension documentation at https://docs.nordicsemi.com/bundle/nrf-connect-vscode/page/guides/ncs_configure_app.html#devicetree-support-in-the-extension
+
+/ {
+	chosen {
+		nordic,pm-ext-flash = &mx25r64;
+	};
+};
+
+&pinctrl {
+    i2s0_default: i2s0_default {
+        group1 {
+            psels = <NRF_PSEL(I2S_SCK_M, 0, 31)>,   /* SCK Pin */
+                    <NRF_PSEL(I2S_LRCK_M, 0, 30)>,  /* WS/LRCK Pin */
+                    <NRF_PSEL(I2S_SDOUT, 0, 29)>;   /* SD Pin (DIN am MAX) */
+        };
+    };
+
+    i2s0_sleep: i2s0_sleep {
+        group1 {
+            psels = <NRF_PSEL(I2S_SCK_M, 0, 31)>,
+                    <NRF_PSEL(I2S_LRCK_M, 0, 30)>,
+                    <NRF_PSEL(I2S_SDOUT, 0, 29)>;
+            low-power-enable;
+        };
+    };
+};
+
+&i2s0 {
+    status = "okay";
+    pinctrl-0 = <&i2s0_default>;
+    pinctrl-1 = <&i2s0_sleep>;
+    pinctrl-names = "default", "sleep";
+};

firmware/apps/_samples/utils/pm_static.yml

@@ -0,0 +1,4 @@
+littlefs_storage:
+  address: 0x0
+  size: 0x800000
+  region: external_flash

firmware/apps/_samples/utils/prj.conf

@@ -0,0 +1,14 @@
+CONFIG_LOG=y
+
+# UART-Grundlagen
+CONFIG_SERIAL=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+
+# Shell-Konfiguration
+CONFIG_SHELL=y
+CONFIG_SHELL_BACKEND_SERIAL=y
+
+# Lasertag-spezifische Konfiguration
+CONFIG_LASERTAG_UTILS=y
+CONFIG_LASERTAG_UTILS_LOG_LEVEL_DBG=y
+

firmware/apps/_samples/utils/src/main.c

@@ -0,0 +1,24 @@
+#include <zephyr/kernel.h>
+#include <zephyr/logging/log.h>
+#include <lasertag_utils.h>
+
+LOG_MODULE_REGISTER(MMS, LOG_LEVEL_INF);
+
+int main(void)
+{
+    LOG_INF("Starting Utils test application...");
+    lasertag_utils_init();
+
+    uint8_t data[] = {0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0xba, 0xbe};
+    uint8_t crc = lastertag_crc8(data, sizeof(data));
+    LOG_INF("CRC8: 0x%02X", crc);
+    if (crc != 0xbe) {
+        LOG_ERR("CRC8 check failed!!");
+    } else {
+        LOG_INF("CRC8 check passed.");
+    }
+    LOG_INF(FORMAT_BLUE_BOLD("This should be in blue and bold if ANSI color codes are supported in the terminal."));
+    LOG_INF("Here, only a part should be " FORMAT_RED("red") " and the rest normal.");
+    LOG_INF(FORMAT_RED_BOLD("this ") FORMAT_GREEN_BOLD("is ") FORMAT_BLUE_BOLD("colorful") FORMAT_YELLOW_BOLD(" as") FORMAT_BRIGHT_BOLD(" fuck") "!");
+    return 0;
+}

firmware/apps/_samples/utils/tool/requirements.txt

@@ -0,0 +1,2 @@
+pyserial
+cbor2

firmware/apps/_samples/utils/tool/tool.py

@@ -0,0 +1,120 @@
+import serial
+import base64
+import cbor2
+import struct
+import time
+import argparse
+import sys
+
+# Icons (NerdFont / Emoji)
+ICON_DIR = "📁" 
+ICON_FILE = "📄"
+
+class nRF_FS_Client:
+    def __init__(self, port, baud):
+        try:
+            self.ser = serial.Serial(port, baud, timeout=0.2)
+            self.seq = 0
+            self.ser.reset_input_buffer()
+        except serial.SerialException as e:
+            print(f"Fehler: Konnte {port} nicht öffnen ({e})")
+            sys.exit(1)
+
+    def crc16(self, data):
+        crc = 0x0000
+        for byte in data:
+            crc ^= (byte << 8)
+            for _ in range(8):
+                if crc & 0x8000:
+                    crc = (crc << 1) ^ 0x1021
+                else:
+                    crc = crc << 1
+                crc &= 0xFFFF
+        return crc
+
+    def build_packet(self, group, cmd, payload):
+        self.seq = (self.seq + 1) % 256
+        cbor_payload = cbor2.dumps(payload)
+        header = struct.pack(">BBHHBB", 0x00, 0x08, len(cbor_payload), group, self.seq, cmd)
+        full_body = header + cbor_payload
+        checksum = self.crc16(full_body)
+        full_msg = full_body + struct.pack(">H", checksum)
+        return struct.pack(">H", len(full_msg)) + full_msg
+
+    def request(self, group, cmd, payload):
+        packet = self.build_packet(group, cmd, payload)
+        b64_data = base64.b64encode(packet).decode()
+        self.ser.write(f"\x06\t{b64_data}\n".encode())
+        
+        full_response_b64 = ""
+        expected_len = -1
+        start_time = time.time()
+        
+        while (time.time() - start_time) < 3.0:
+            line = self.ser.readline().strip()
+            if not line:
+                continue
+            
+            is_smp = line.startswith(b'\x06\t') or line.startswith(b'\x06\n')
+            is_cont_special = line.startswith(b'\x04\x14') and expected_len > 0
+
+            if is_smp or is_cont_special:
+                full_response_b64 += line[2:].decode()
+                try:
+                    raw_data = base64.b64decode(full_response_b64)
+                    if expected_len == -1 and len(raw_data) >= 2:
+                        expected_len = struct.unpack(">H", raw_data[:2])[0]
+                    
+                    if expected_len != -1 and len(raw_data) >= expected_len + 2:
+                        if raw_data[8] == self.seq:
+                            return cbor2.loads(raw_data[10:-2])
+                except:
+                    continue
+        return None
+
+    def list_recursive(self, path="/", prefix=""):
+        res = self.request(64, 0, {"path": path})
+        if res is None or 'files' not in res:
+            return
+
+        # Sortierung: Verzeichnisse zuerst, dann Namen
+        entries = sorted(res['files'], key=lambda x: (x.get('t', 'f') != 'd', x['n']))
+        count = len(entries)
+
+        for i, entry in enumerate(entries):
+            is_last = (i == count - 1)
+            name = entry['n']
+            is_dir = entry.get('t', 'f').startswith('d')
+            
+            # Line-Art Auswahl
+            # connector = "└── " if is_last else "├── "
+            connector = "└─ " if is_last else "├─ "
+
+
+            print(f"{prefix}{connector}{ICON_DIR if is_dir else ICON_FILE} {name}")
+            
+            if is_dir:
+                # Prefix für die nächste Ebene erweitern
+                extension = "   " if is_last else "│  "
+                sub_path = f"{path}/{name}".replace("//", "/")
+                self.list_recursive(sub_path, prefix + extension)
+
+    def close(self):
+        if hasattr(self, 'ser') and self.ser.is_open:
+            self.ser.close()
+
+def main():
+    parser = argparse.ArgumentParser(description="nRF52840 LittleFS Tree Tool")
+    parser.add_argument("port", help="Serieller Port (z.B. /dev/cu.usbmodem...)")
+    args = parser.parse_args()
+
+    client = nRF_FS_Client(args.port, 115200)
+    print(f"--- Dateistruktur auf nRF ({args.port}) ---")
+    try:
+        # Initialer Aufruf
+        client.list_recursive("/")
+    finally:
+        client.close()
+
+if __name__ == "__main__":
+    main()

firmware/libs/lasertag_utils/include/lasertag_utils.h

@@ -46,6 +46,14 @@ int lasertag_init_watchdog(void);
 void lasertag_feed_watchdog(void);
 #endif /* LASERTAG_UTILS_H */
 
+/**
+ * @brief Calculate CRC8 checksum for the given data.
+ * @param data Pointer to the data buffer.
+ * @param len Length of the data buffer.
+ * @return Calculated CRC8 checksum.
+ */
+uint8_t lastertag_crc8 (const uint8_t *data, size_t len);
+
 /**
  * ANSI Defines for bold text formatting in logs.
  */

firmware/libs/lasertag_utils/src/lasertag_utils.c

@@ -54,6 +54,7 @@ int lasertag_set_device_name(const char *name, size_t len)
     return settings_save_one("lasertag/name", device_name, len);
 }
 
+/* --- Watchdog --- */
 #ifdef CONFIG_WATCHDOG
 #include <zephyr/drivers/watchdog.h>
 #include <zephyr/logging/log_ctrl.h>
@@ -106,4 +107,36 @@ void lasertag_feed_watchdog(void)
         LOG_DBG("Watchdog '%s' fed successfully", wdt->name);
     }
 }
-#endif /* CONFIG_WATCHDOG */
+#endif /* CONFIG_WATCHDOG */
+
+
+/* --- Utility Functions --- */
+
+/* CRC8 CCITT polynome lookup table (polynome: 0x07, initial: 0x00) */
+static const uint8_t crc8_table[256] = {
+    0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
+    0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
+    0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
+    0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
+    0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
+    0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
+    0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
+    0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
+    0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
+    0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
+    0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
+    0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
+    0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
+    0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
+    0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
+    0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
+};
+
+uint8_t lastertag_crc8(const uint8_t *data, size_t len)
+{
+    uint8_t crc = 0x00;
+    for (size_t i = 0; i < len; i++) {
+        crc = crc8_table[crc ^ data[i]];
+    }
+    return crc;
+}