44blib.c

可以实现44B0的底层所有通信

void Uart_Init(int mclk,int baud)
{
    int i;
    if(mclk==0)
	mclk=MCLK;
    rUFCON0=0x0;     //FIFO disable
    rUFCON1=0x0;
    rUMCON0=0x0;
    rUMCON1=0x0;
//UART0
    rULCON0=0x3;     //Normal,No parity,1 stop,8 bit
//    rULCON0=0x7;     //Normal,No parity,2 stop,8 bit
    rUCON0=0x245;    //rx=edge,tx=level,disable timeout int.,enable rx error int.,normal,interrupt or polling
    rUBRDIV0=( (int)(mclk/16./baud + 0.5) -1 );
//UART1
//    rULCON1=0x7;     //Normal,No parity,2 stop,8 bit
    rULCON1=0x3;
    rUCON1=0x245;
    rUBRDIV1=( (int)(mclk/16./baud + 0.5) -1 );

    for(i=0;i<100;i++);
}


void Uart_Select(int ch)
{
    whichUart=ch;
}


void Uart_TxEmpty(int ch)
{
    if(ch==0)
	while(!(rUTRSTAT0 & 0x4)); //wait until tx shifter is empty.
    else
    	while(!(rUTRSTAT1 & 0x4)); //wait until tx shifter is empty.
}


char Uart_Getch(void)
{
    if(whichUart==0)
    {	    
	while(!(rUTRSTAT0 & 0x1)); //Receive data read
	return RdURXH0();
    }
    else
    {
	while(!(rUTRSTAT1 & 0x1)); //Receive data ready
	return	rURXH1;
    }
}
void Uart_GetchEmpty(void)
{	
	int i;
	i=0;
	if(whichUart==0)
    {	    
		while(!(rUTRSTAT0 & 0x1))
		{
			i++;
			if(i==10000)break;
		} 	
    }
    else
    {
		while(!(rUTRSTAT1 & 0x1))
		{
			i++;
			if(i==10000)break;
		}	
    }
}

char Uart_GetKey(void)
{
    if(whichUart==0)
    {	    
	if(rUTRSTAT0 & 0x1)    //Receive data ready
    	    return RdURXH0();
	else
	    return 0;
    }
    else
    {
	if(rUTRSTAT1 & 0x1)    //Receive data ready
	    return rURXH1;
	else
	    return 0;
    }
}


void Uart_GetString(char *string)
{
    //char *string2;//=string;
    //char strin3[40];
    char c;
    int  i;
    i=0;
    while((c=Uart_Getch())!='\r')
    {
		/*if(c=='\b')
		{
		    if(	(int)string2 < (int)string )
		    {
			Uart_Printf("\b \b");
			string--;
		    }
		}
		else 
		{*/
		    string[i++]=c;
		    //Uart_SendByte(c);
		//}
    }
    string[i]='\0';
    //Uart_Printf("string = %s\n",string);
    //Uart_SendByte('\n');
    //string=string2;
}

//This function is edited by chenzhi 
int Uart_GetIntNum(void)
{
    char str[30];
    char *string=str;
    //int base=10;
    //int minus=0;
    int lastIndex,leng,*numb;
    int result=0;
    int i,flag=1;
	//Uart_GetchEmpty();	
    Uart_Printf("\nPlease Enter a 0~9 DEC Number,and End by 'Enter' Key!");//edit by chenzhi
    Uart_GetString(string);
    if(string[0]<'0' || string[0]>'9')string++;
    leng=strlen(string);
    lastIndex=strlen(string)-1;
    Uart_Printf("string = %s\n",string);
    Uart_Printf("\nleng=%d, lastIndex=%d\n",leng,lastIndex);//edit by chenzhi
    for(i=0;i<leng;i++)
    {
    	if(string[i]<'0' || string[i]>'9')
    	{
    		Uart_Printf("The Number is a Illegal DEC Number!\n");
    		result=0;
    		flag=0;
    		break;
		} 
		else
		{
			numb[i]=string[i]-'0';
		}
	}	
	if(flag==1)
	{	
		if(leng>1)
		{
			for(i=0;i<leng;i++)
				result=result+numb[i+1]*10+numb[i];
				
		}
		else
			result=numb[0];
	}   		
/*    if(string[0]=='-')
    {
        minus=1;
        string++;
    }
    
    if(string[0]=='0' && (string[1]=='x' || string[1]=='X'))
    {
	base=16;
	string+=2;
    }
    
    lastIndex=strlen(string)-1;
    if( string[lastIndex]=='h' || string[lastIndex]=='H' )
    {
	base=16;
	string[lastIndex]=0;
	lastIndex--;
    }*/

/*    if(base==10)
    {
	result=atoi(string);
	Uart_Printf("\n\nresult=%d\n",result);//edit by chenzhi
	result=minus ? (-1*result):result;
    }
    else
    {
	for(i=0;i<=lastIndex;i++)
	{
    	    if(isalpha(string[i]))
	    {
		if(isupper(string[i]))
		    result=(result<<4)+string[i]-'A'+10;
		else
		    result=(result<<4)+string[i]-'a'+10;
	    }
	    else
	    {
		result=(result<<4)+string[i]-'0';
	    }
	}
	result=minus ? (-1*result):result;
    }*/
    return result;
}


void Uart_SendByte(int data)
{
    if(whichUart==0)
    {
	if(data=='\n')
	{
	    while(!(rUTRSTAT0 & 0x2));
	    Delay(10);	//because the slow response of hyper_terminal 
	    WrUTXH0('\r');
	}
	while(!(rUTRSTAT0 & 0x2)); //Wait until THR is empty.
	Delay(10);
	WrUTXH0(data);
    }
    else
    {
	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 you don't use vsprintf(), the code size is reduced very much.
void Uart_Printf(char *fmt,...)
{
    va_list ap;
    char string[256];

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


/*void Led_Display(int LedStatus)
{
	//PC1,PC2,PC3 High available
    rPDATC=(rPDATC & 0x1f1) | ((LedStatus & 0x7)<<1);
}*/

/************************* PLL ********************************/
void ChangePllValue(int mdiv,int pdiv,int sdiv)
{
    rPLLCON=(mdiv<<12)|(pdiv<<4)|sdiv;
}


/************************* General Library **********************/

void * malloc(unsigned nbyte) 
{
    void *returnPt=mallocPt;

    mallocPt= (int *)mallocPt+nbyte/4+((nbyte%4)>0); //to align 4byte

    if( (int)mallocPt > HEAPEND )
    {
	mallocPt=returnPt;
	return NULL;
    }
    return returnPt;
}
void free(void *pt)
{
    mallocPt=pt;
}


void Cache_Flush(void)
{
    int i,saveSyscfg;
    
    saveSyscfg=rSYSCFG;

    rSYSCFG=SYSCFG_0KB; 		      
    for(i=0x10004000;i<0x10004800;i+=16)    
    {					   
	*((int *)i)=0x0;		   
    }
    rSYSCFG=saveSyscfg; 			    
}
/************************* Timer ********************************/

void Timer_Start(int divider)  //0:16us,1:32us 2:64us 3:128us
{
    rWTCON=((MCLK/1000000-1)<<8)|(divider<<3);
    rWTDAT=0xffff;
    rWTCNT=0xffff;   

    // 1/16/(65+1),nRESET & interrupt  disable
    rWTCON=((MCLK/1000000-1)<<8)|(divider<<3)|(1<<5);	
}


int Timer_Stop(void)
{
//    int i;
    rWTCON=((MCLK/1000000-1)<<8);
    return (0xffff-rWTCNT);
}