main.c

S3C2410学习的基础资料 大部分实验源码及工程

#include "2410lib.h"
#include "2410addr.h"

static int UartNum=0;
//===============================================================
//对Uart进行初始化，以所需要的波特率为输入参数
void myUart_Init(int whichuart, int baud)
{
   if(whichuart==0)
   {
        UartNum=0;
        
		rGPHCON = rGPHCON & (~(0xffff)) ;
		rGPHCON = rGPHCON | (0xaaa0) ;
    	rGPHUP  = 0x0;    // The pull up function is enable
	
		rUFCON0=0x00;   //不使用FIFO
        rUMCON0=0x00;   //不使用自动流控制
        rULCON0=0x03;   //不采用红外线传输模式，无奇偶校验位，1个停止位，8个数据位
        rUCON0=0x245;   //发送中断为电平方式，接收中断为边沿方式，禁止超时中断，允许产生错误状态中断，禁止回送模式，禁止中止			//信号，传输模式为中断请求模式，接收模式也为中断请求模式。
        rUBRDIV0=((int)(PCLK/(baud*16))-1); //根据波特率计算UBRDIV0的值
		Delay(10);
    }
    else if(whichuart==1)
    {
        UartNum=1;
        
		rGPHCON = rGPHCON & (~(0xffff)) ;
		rGPHCON = rGPHCON | (0xaaa0) ;
    	rGPHUP  = 0x0;    // The pull up function is enable
	
		rUFCON1=0x0;    
        rUMCON1=0x0;   
        rULCON1=0x3; 
        rUCON1=0x245; 
        rUBRDIV0=((int)(PCLK/(baud*16))-1);
        Delay(10);
    }
}

/*******************************************************************/
void myUart_SendByte(char ch)
{
	if (UartNum ==0)
    {
		if(ch=='\n')
		{
		    while(!(rUTRSTAT0 & 0x2));//等待，直到发送缓冲区为空
		    //Delay(10);	//超级中断的响应速度较慢 
		    WrUTXH0('\r');//发送回车符
		}
		while(!(rUTRSTAT0 & 0x2)); //等待，直到发送缓冲区为空
		Delay(10);
		WrUTXH0(ch);//发送字符
   	}
	else
    {
		if(ch=='\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);
	    WrUTXH1(ch);
    }	
}

//====================================================================
void myUart_Send (char *str)
{
    myUart_Init(0,115200);
	while (*str)
	myUart_SendByte(*str++);
}	


/********************************************************************/
char myUart_ReceiveByte(void)
{
    if(UartNum==0)
    {       
        while(!(rUTRSTAT0 & 0x1)); //Receive data ready
        return RdURXH0();
    }
    else if(UartNum==1)
    {       
        while(!(rUTRSTAT1 & 0x1)); //Receive data ready
        return RdURXH1();
    }
    return 0;
}

//===================================================================
void myUart_receive(char *string)
{
	 char *string2 = string;
     char c;
     myUart_Init(0,115200);
     while((c = myUart_ReceiveByte())!='\r')
     {
        if(c=='\b')
        {
            if( (int)string2 < (int)string )
            {
                printf("\b \b");
                string--;
            }
        }
        else 
        {
            *string++ = c;
            myUart_SendByte(c);
        }
     }
     *string='\0';
     myUart_SendByte('\n');
}

//======================================================================

int Main(void)
{
	char aa;
	char *str;         
    char *string;
     ChangeClockDivider(1,1);
     ChangeMPllValue(0xa1,0x3,0x1);   
     Port_Init();
		
    myUart_Send("Please Input a string:\n");
    myUart_receive(string);
    *str=*string;
    Delay(500);
    myUart_Send(str);
    while(1);	
}