void init_uart(void) {
 // C/T2 = 0 (Interne Frequenz benutzen)
 SCON = 0x50;   //   0x50;   // Mode 1 (8-bit xmit, no stop bit etc, enable reception)
 RCLK = 1;      // Use Timer 2 as Reference
 TCLK = 1;      // Use Timer 2 as Reference
 // Calculated with formula: 65536 - (OszFreq / ( IIf(Cycles=6,16,32) * Baud Rate))  -- OszFreq = 18432000, Cycles=12
 // 2400 Baud ==> FF10
 // 9600 Baud ==> FFC4
// RCAP2L = 0x10;
// RCAP2H = 0xFF; 
 RCAP2L = 0xC4;
 RCAP2H = 0xFF; 
 TR2 = 1;       // Timer 2 run
 ES = 1;        // Enable serial interrupt
 EA = 1;        // Enable general interrupts
}