مشکل در راه اندازی uart2

سلام دوستان کسی میتونه بگه مشکل این کد من کجاست ؟ من UART0 راه اندازی کردم ولی ,UART2 رو شبیه سازی KEIL نتونستم نتیجه بگیرم با این کد .

#include "LPC17xx.h"
















#define PinSelection0 LPC_PINCON->PINSEL0
#define SystemFrequency 12000000




#define DLL0 LPC_UART0->DLL
#define DLM0 LPC_UART0->DLM


#define DLL1 LPC_UART1->DLL
#define DLM1 LPC_UART1->DLM


#define DLL2 LPC_UART2->DLL
#define DLM2 LPC_UART2->DLM


#define DLL3 LPC_UART3->DLL
#define DLM3 LPC_UART3->DLM


#define SendTx LPC_UART2->THR
#define RecievedRx LPC_UART2->RBR


void UART2_init(uint32_t baudrate)
{
/* (9600);
(19200);
(38400);
(115200);*/

uint32_t ClkBitValue,Plk,BaudrateRegValue;

/*the rate of the clock signal
that will be supplied to the corresponding peripheral as specified*/
//LPC_SC->PCLKSEL1 =0; //16:17 uart 2 00 means clk/4


LPC_SC->PCONP |= 1 << 24 ; // UART 2 power/clock control bit.

//-----------------PinSelection
PinSelection0 |= 1<< 20 ; // p0.10 setting as TX2
PinSelection0 |= 1<< 22 ; // p0.11 setting as RX2
//---------------------------------
//LPC_UART2->FCR = 1<<1 | 1<<2 | 1<<3 ; // FIFO enable - RX TX FIFO
//LPC_UART2->FCR = 0x07;
//-----------------------------------

LPC_UART2->LCR |= 3<<0; // 8-bit character length - 1 stop bit No parity // Line Control Register
LPC_UART2->LCR |= 1<<7; //1 DLAB Enable access to Divisor Latches.

//Peripheral Clock Selection register bit values

ClkBitValue = (LPC_SC->PCLKSEL1 >> 16) & 0x03;

switch (ClkBitValue)
{
case 0x00:
Plk = SystemFrequency/4;
break;
case 0x01:
Plk = SystemFrequency;
break;
case 0x02:
Plk = SystemFrequency/2;
break;
case 0x03:
Plk = SystemFrequency/8;
break;
}

BaudrateRegValue = Plk / (16 * baudrate );
DLL2 = BaudrateRegValue & 0xFF ;
DLM2 = (BaudrateRegValue >> 8) & 0xFF;

LPC_UART2->LCR = 0x03; // Clear DLAB after setting DLL,DLM
LPC_UART2->FCR = 0x07;
}




int UART2_SendByte (int ucData)
{
while (!(LPC_UART2->LSR >>5 & 0x01)); // when transfer date set THRE
{
return (LPC_UART2->THR = ucData);
}
}


int main ()
{
//int i;
// char a[]="\n\r Testing Uart";

UART2_init(19200);





/*for (i= 0;i < 10 ;i++)
{
UartTx(i);
}*/
UART2_SendByte ('s');
UART2_SendByte ('a');
UART2_SendByte ('l');
UART2_SendByte ('a');
UART2_SendByte ('m');



while (1)
{
//UART2_SendByte('s');

}





}

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