uart.c

s3c2440 串口接收模块设计。开发环境在ADS1.2。

#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "uart.h"

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
//***************************[ UART ]******************************
static int whichUart=0;

void Uart_Init()
{

//UART1
    rULCON1 = 0x3;
    rUCON1  = 0x245;
    rUBRDIV1=( (int)(PCLK/16./115200+0.5) -1 );
}

//=====================================================================
void Uart_SendByte(int data)
{
  
        if(data=='\n')
        {
            while(!(rUTRSTAT1 & 0x2));
            Delay(10);                 //because the slow response of hyper_terminal 
            rUTXH1 = '\r';
        }
        while(!(rUTRSTAT1 & 0x2));   //Wait until THR is empty.
        Delay(10);
        rUTXH1 = data;
 
}               

//====================================================================
void Uart_SendString(char *pt)
{
    while(*pt)
        Uart_SendByte(*pt++);
}

#if !USE_MAIN
//If you don't use vsprintf(), the code size is reduced very much.
void Uart_Printf(const char *fmt,...)
{
    va_list ap;
    char string[256];

    va_start(ap,fmt);
    vsprintf(string,fmt,ap);
    Uart_SendString(string);
    va_end(ap);
}
#endif


//=====================================================================
char Uart_Getch(void)
{
   
        while(!(rUTRSTAT1 & 0x1)); //Receive data ready
        return RdURXH1();
}

//====================================================================
char Uart_GetKey(void)
{
   
        if(rUTRSTAT1 & 0x1)    //Receive data ready
            return RdURXH1();
        else
            return 0;
   
}

//====================================================================
void Uart_GetString(char *string)
{
    char *string2 = string;
    char c;
    while((c = Uart_Getch())!='\r')
    {
        if(c=='\b')
        {
            if( (int)string2 < (int)string )
            {
                Uart_Printf("\b \b");
                string--;
            }
        }
        else 
        {
            *string++ = c;
            Uart_SendByte(c);
        }
    }
    *string='\0';
    Uart_SendByte('\n');
}