From 0a5f176582c60b0b1845d97012429a5e06b45f62 Mon Sep 17 00:00:00 2001
From: "DLABAL, Eduard" <eduard.dlabal@edcs.cz>
Date: Tue, 13 May 2025 10:28:37 +0200
Subject: [PATCH] Refactor RFID handler and user structures; add UART
 configuration and packet parsing functions; create logger header and source
 files

---
 include/logger.h       |  0
 include/rfid_handler.h | 10 ++++-
 include/users.h        |  4 +-
 src/logger.c           |  0
 src/main.c             |  2 +-
 src/rfid_handler.c     | 98 ++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 110 insertions(+), 4 deletions(-)
 create mode 100644 include/logger.h
 create mode 100644 src/logger.c

diff --git a/include/logger.h b/include/logger.h
new file mode 100644
index 0000000..e69de29
diff --git a/include/rfid_handler.h b/include/rfid_handler.h
index 02c9e77..3a0e9d2 100644
--- a/include/rfid_handler.h
+++ b/include/rfid_handler.h
@@ -1,7 +1,15 @@
 #ifndef __RFID_HANDLER_H__
 #define __RFIT_HANDLER_H__
 
-#endif
+#include "main.h"
 
 // UART handler thread
 void *uartListener(void *arg);
+
+void parseIncommingPacket(BYTE * _packet);
+
+void sendPacketToDevice(BYTE * _packet);
+
+#endif
+
+
diff --git a/include/users.h b/include/users.h
index 56f76b9..4ba26b6 100644
--- a/include/users.h
+++ b/include/users.h
@@ -12,8 +12,8 @@ typedef struct person
 {
     uint16_t uuid;
 
-    char *name;
-    char *surname;
+    BYTE *name;
+    BYTE *surname;
     uint32_t department;
 
     time_t last_time_event;
diff --git a/src/logger.c b/src/logger.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.c b/src/main.c
index f0faee3..9e102f4 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,11 +8,11 @@
 #include <termios.h>
 #include <string.h>
 
+#include "main.h"
 #include "users.h"
 #include "tui.h"
 #include "rfid_handler.h"
 #include "file_operations.h"
-#include "main.h"
 
 int main(int argc, char const **argv)
 {
diff --git a/src/rfid_handler.c b/src/rfid_handler.c
index 62eea72..f2ab590 100644
--- a/src/rfid_handler.c
+++ b/src/rfid_handler.c
@@ -21,6 +21,104 @@ void *uartListener(void *arg)
         return NULL;
     }
 
+    struct termios options;
+    tcgetattr(uart, &options);
+
+    cfsetispeed(&options, B9600);
+    cfsetospeed(&options, B9600);
+    options.c_cflag &= ~PARENB;
+    options.c_cflag &= ~CSTOPB;
+    options.c_cflag &= ~CSIZE;
+    options.c_cflag |= CS8;
+    options.c_cflag |= CREAD | CLOCAL;
+
+    options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+    options.c_iflag &= ~(IXON | IXOFF | IXANY);
+    options.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL);
+    options.c_oflag &= ~OPOST;
+
+    options.c_cc[VMIN] = 1;
+    options.c_cc[VTIME] = 0;
+
+    if (tcsetattr(uart, TCSANOW, &options) != 0)
+    {
+        perror("tcsetattr");
+        exit(EXIT_FAILURE);
+    }
+
+
+     enum
+    {
+        SYNC0,
+        SYNC1,
+        READING_PACKET
+    } state = SYNC0;
+    uint8_t packet[6];
+    int packet_index = 0;
+
+    while (1)
+    {
+        uint8_t byte;
+        ssize_t n = read(uart, &byte, 1);
+        if (n == -1)
+        {
+            perror("read");
+            exit(EXIT_FAILURE);
+        }
+
+        switch (state)
+        {
+        case SYNC0:
+            if (byte == 0x55)
+            {
+                packet[0] = byte;
+                packet_index = 1;
+                state = SYNC1;
+            }
+            break;
+
+        case SYNC1:
+            if (byte == 0xFF)
+            {
+                packet[1] = byte;
+                packet_index = 2;
+                state = READING_PACKET;
+            }
+            else
+            {
+                state = SYNC0;
+            }
+            break;
+
+        case READING_PACKET:
+            packet[packet_index++] = byte;
+            if (packet_index == 6)
+            {
+                uint8_t crc = 0;
+                for (int i = 0; i < 5; i++)
+                {
+                    crc ^= packet[i];
+                }
+
+                if (crc == packet[5])
+                {
+                    
+                }
+                else
+                {
+                    //fprintf(stderr, "Chyba CRC!\n");
+                }
+                state = SYNC0;
+            }
+            break;
+        }
+    }
+
     close(uart);
     return NULL;
+}
+
+void parseIncommingPacket(BYTE * _packet)
+{
+    
 }
\ No newline at end of file