Refactor RFID handler and user structures; add UART configuration and packet parsing functions; create logger header and source files

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)
 {

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)
+{
+    
 }