Problem mit UART auf Stellaris TM4C123GH6PGE = LM4F232H5QD

 const int idelay = 1000;        //for delay

 unsigned long int* RCGCUART;    //address of Rcgcuart

 unsigned long int* RCGCGPIO;    //..

 unsigned long int* GPIOAFSEL;   //..

 unsigned long int* GPIOPCTL;    //..

 unsigned long int* UARTCTL;     //..

 unsigned long int* UARTIBRD;    //..

 unsigned long int* UARTFBRD;    //..

 unsigned long int* UARTLCRH;    //..

 unsigned long int* PPUART;      //..

//1.Enable UART via RCGCUART Register page 333

//Base address 0x400F.E000 is a System Control Register as seen on page 97

//Offset address 0x618 Adress for the RCGCUART Register

//Addition gives the adresse: 0x400F.E618

//to set the UART4 the fifth Bit must be set.

RCGCUART = 0x400FE618;

//*RCGCUART &= 0xEF; // Disable UART4

*RCGCUART |= 0x10; //Enable UART4

delay_ms(idelay);

//2.Enable the clock to the appropiate GPIO module via RCGCGPIO page 328

//The Base address is 0x400F.E000

//The offset address is 0x608

//That gives: 0x400F.E608

//PORTC is the third Bit so : 0x4 = 0b100

RCGCGPIO = 0x400FE608;

*RCGCGPIO |= 0x4;

delay_ms(idelay);

//3.Setting the GPIO AFSEL for the appropiate PINs

//GPIO PORTC APB Base is on 0x4000.6000

//Offset is 0x420 -> that gives in total 0x4000.6420

//PORTC4/5 Uart4 is on Pin 36/35

GPIOAFSEL = 0x40006420;

*GPIOAFSEL |= 0x30;

delay_ms(idelay);

//4.Configure Current level and slew rate control

//2mA default

//Slew rate default no slew rate control

//5.Configure PMCn fields in the GPIOPCTL register to asign the UART Signals to the appropiate pin

//Base of the GPIOPCTL register is 0x4000.6000 for PORTC APB

//The offset is 0x52C

//That gives 0x4000652C

//Write the appropiate value for UART4 into the Pin4 and Pin5 fields. Should be 0x2;

GPIOPCTL = 0x4000652C;

*GPIOPCTL |= 0x00110000;

delay_ms(idelay);

//Configuration of the UART:

//1.Disable UART

//Disabling by resetting UARTEN in the UARTCTL register

//Base address is 0x4001.0000

//The offset address is 0x030

//UARTEN is the first Bit

UARTCTL = 0x40010030;

*UARTCTL &= 0xFFFFFFFE;

*UARTCTL |= 0x300;

delay_ms(idelay);

//2.BAUDRATE

//BRD = 16000000 / (16 * 115200) = 8,6805°

//UARTFBRD = integer(0,6805 * 64 + 0.5) = 44

//UARTIBRD base is on 0x4001.0000

//and offset is 0x024

//UARTFBRD base is on 0x4001.0000

//and offset is 0x028

UARTIBRD = 0x40010024;

*UARTIBRD |= 0x8;

UARTFBRD = 0x40010028;

*UARTFBRD |= 0x2C;

delay_ms(idelay);

//3.data length, parity and stop bit

//This is set in the UARTLCRH register

//The base address is 0x4001.0000

//The offset address is 0x02C

// Bit 5 and 6 are the data length. 0x3 is 8 bits.

// no parity and 1 stop bit default

UARTLCRH = 0x4001002C;

*UARTLCRH |= 0x60; //0b01100000

delay_ms(idelay);

//4.Enable the UART4 again

UARTCTL = 0x40010030;

*UARTCTL |= 0x00000001;

delay_ms(idelay);

//Transmit on UARTDR register

//Base address for UART4 0x4001.0000

//offset address is 0x00

unsigned long int* UARTDR = 0x40010000;

*UARTDR |= 0x41;                             //Letter A