UART function test of s3c2440

/* File name: UART.c
/* Function: The most basic UART sending and receiving
/* Author: Wujianqi
/* Version: 1.0
#include "2440addr.h" //Includes the settings of 2440 related registers
#include "def.h"
//The four LEDs correspond to GPB5.6.7.8.
#define LED1 5
#define LED2 6
#define LED3 7
#define LED4 8
#define BAUD 115200 //Baud rate
#define Bit（x） （1《x） //Set a bit
#define Output（x） （1《2*x） //Set the corresponding IO as output
#define LED_On（x） rGPBDAT=~Bit（x） //Turn on the corresponding LED
* Name: Clk_Set
* Function: About initialization of system clock
* Input parameter: None
* Output parameter: None
void Clk_Set（void）
{
int count;
rUPLLCON=（56《12）|（2《4）|2; //UCLK is 48MHZ
rMPLLCON=（92《12）|（1《4）|1; //FCLK is 400MHZ
rCLKDIVN=（0《3）|（2《1）|1;//HCLK is 100MHZ, PCLK is 50MHZ
rCAMDIVN=（0《9）； //PCLK=HCLK/4
}
* Name: IO_init
* Function: Port initialization for LED
* Input parameters: None
* Output parameters: None
void IO_init（void）
{
rGPBCON=Output（LED1）|Output（LED2）|Output（LED3）|Output（LED4）； //Set the IO port of LED to output
rGPBDAT=0xffff; //Turn off all LEDs
}
* Name: UART0_init
* Function: Initialization work related to UART0
* Input parameters: None
* Output parameters: None
void UART0_init（void）
{
rGPHCON=0xa0; //IO port enables UART0 function
rGPHUP=0xff; //Pull-up disabled
rULCON0=0x03; // 8-bit data, no parity, 1 stop bit
rUCON0=0x05; //pclk clock, interrupt request mode is Tx-level, Rx-pulse
rUBRDIV0=26; //Set baud rate
rUFCON0=0x00; //Do not use FIFO
rUMCON0=0x00; //Do not use flow control
}
* Name: Send_Byte
* Function: Send a character
* Input parameter: Waiting for the character to be sent
* Output parameter: None
void Send_Byte(char data)
{
while(!(rUTRSTAT0&0x2)); //Wait for the send buffer to be empty
rUTXH0=data;
}
* Name: Send_String
* Function: Send string
* Input parameter: Waiting for the string to be sent
* Output parameter: None
void Send_String(char* pt)
{
while(*pt)
{
Send_Byte(*pt++);
}
}
* Name: Uart_Getch
* Function: Receive a character
* Input parameter: None
* Output parameter: Received character
char Uart_Getch(void)
{
while(!(rUTRSTAT0&0x1)); //Wait for the receive buffer to have data
return (rURXH0); //Read out data
}
* Name: Main
* Function: Test UART sending and receiving functions
* Input parameter: None
* Output parameter: None
void Main(void)
{
char temp;
IO_init();
UART0_init();
Clk_Set();
Send_String("HelloWorld"); //Send string
while(1)
{
temp=Uart_Getch(); //Receive character
if(temp==0x01)
{
LED_On(LED1);
}
}
}