uart_3.c

ucos on lpc213x ,and a sample for the arm7

// this file is define the UART3 function prototype
/* created by bill.zhang */
#include "uart.h"


#define MODE_QUICKA



void delay_3()
{
	  int i=4000;
	  while (i--);
}




void UART3_Init (void)
{
	T1TC   = 0;			/* 定时器设置为0							*/
	T1PR   =0;			/* 时钟不分频								*/
	T1MCR  = 0x03;		/* 设置T1MR1匹配后复位T1TC，并产生中断标志	*/
	T1MR0  = (Fcclk/16)/2520;	//set baud rate
}


/**********************************UART get functions******************************************************/
//========================================getbyte================================
uint8 UART3_GetByte (void)
{
	uint8 rcv_dat,Rvar;
	uint32 UART_RX_3,Uart_Rvar;
	Rvar=0x00;
	UART_RX_3=(1<<25);//p0.25 as the UART3 RX
	Uart_Rvar=(3<<18);

	PINSEL1=PINSEL1&(~Uart_Rvar);
	IO0DIR&=(~Uart_Rvar);
	
#ifdef MODE_QUICKA 


// --------------------receive startbit------------------------------------------
	while ((IO0PIN&UART_RX_3)!=0) ;// check the start style

	
// --------------------receive startbit------------------------------------------
//---------------------START TIMER0 template-------------------------------------
	T1TCR  = 0x01;		//start timer0
//---------------------START TIMER0 template-------------------------------------


//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------




//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ biT1-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x01;
		else
			rcv_dat|=0x01;
// --------------------READ biT1-------------------------------------------------

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ biT1-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x02;
		else
			rcv_dat|=0x02;
// --------------------READ biT1-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit2-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x04;
		else
			rcv_dat|=0x04;
// --------------------READ bit2-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit3-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x08;
		else
			rcv_dat|=0x08;
// --------------------READ bit3-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit4-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x10;
		else
			rcv_dat|=0x10;
// --------------------READ bit4-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit5-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x20;
		else
			rcv_dat|=0x20;
// --------------------READ bit5-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit6-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x40;
		else
			rcv_dat|=0x40;
// --------------------READ bit6-------------------------------------------------

	

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------

// --------------------READ bit7-------------------------------------------------
	if ((IO0PIN&UART_RX_3)==0)
		rcv_dat&=~0x80;
		else
			rcv_dat|=0x80;
// --------------------READ bit7-------------------------------------------------

//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------
	
	while((T1IR & 0x01) == 0) if(rcv_dat) break;

//---------------------end TIMER0 template------------------------------------
	T1TCR  = 0x00;		
//---------------------end TIMER0 template------------------------------------

	//return rcv_dat;

#else
	unsigned char rch,ii;
	
//---------------------START TIMER0 template-------------------------------------
	T1TCR  = 0x01;		
//---------------------START TIMER0 template-------------------------------------


	ii=0;
	rch=0;
//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------
	
	while(ii<8)
	{
		rch>>=1;
		if(rcv_dat) rch|=0x80;
		ii++;
		
//---------------------TIMER processing template---------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template---------------------------------
		
    }
    
	while((T1IR & 0x01) == 0) if(rcv_dat) break;
	
//---------------------end TIMER0 template------------------------------------
	T1TCR  = 0x00;		
//---------------------end TIMER0 template------------------------------------

	return rch;

#endif 

	return rcv_dat;
}
//========================================getbyte================================

//========================================getstring==============================
void UART3_GetStr (uint8 *s, uint32 n)
{
	for ( ; n>0; n--)
	{
		*s++ = UART1_GetByte();
	}
}
//========================================getstring=============================
/**********************************UART get functions******************************************************/



/**********************************UART send functions******************************************************/
//========================================sendbyte==============================
void UART3_SendByte (uint8 dat)
{

	uint8 ACC;
	uint32 UART_TX_2,Uart_var1;
	
	ACC=dat;
	
	UART_TX_2=(1<<28);
	Uart_var1=(3<<24);

	PINSEL1=PINSEL1&(~Uart_var1);
	IO0DIR=UART_TX_2;

	delay_3();

#ifdef MODE_QUICKA 

//---------------------START TIMER0 template------------------------------------
	T1TCR  = 0x01;		
//---------------------START TIMER0 template------------------------------------
	
	IO0CLR=UART_TX_2;//start bit
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

// --------------------biT1-----------------------------------------------------
	if ((ACC&0x01)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------biT1-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------
	
// --------------------biT1-----------------------------------------------------
	if ((ACC&0x02)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------biT1-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

// --------------------bit2-----------------------------------------------------
	if ((ACC&0x04)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit2-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------
	
// --------------------bit3-----------------------------------------------------
	if ((ACC&0x08)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit3-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

// --------------------bit4-----------------------------------------------------
	if ((ACC&0x10)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit4-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------
	
// --------------------bit5-----------------------------------------------------
	if ((ACC&0x20)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit5-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

// --------------------bit6-----------------------------------------------------
	if ((ACC&0x40)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit6-----------------------------------------------------

//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

// --------------------bit7-----------------------------------------------------
	if ((ACC&0x80)==0)
		IO0CLR=UART_TX_2;
		else
			IO0SET=UART_TX_2;
// --------------------bit7-----------------------------------------------------
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

	IO0SET=UART_TX_2;//end bit
	
#else 
	unsigned char ii;
	
	ii=0;
	
//---------------------START TIMER0 template------------------------------------

	T1TCR  = 0x01;		
//---------------------START TIMER1 template------------------------------------
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------
	
	while(ii<8)
	{
		if(dat&1)

			IO0SET=UART_TX_2;
	
			else

				IO0CLR=UART_TX_2;

//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------
		ii++;
		inch>>=1;
	}

	IO0SET=UART_TX_2;
	
//---------------------TIMER processing template--------------------------------
	while ((T1IR & 0x01) == 0) ;
		T1IR = 0x01;//clear the flag
//---------------------TIMER processing template--------------------------------

#endif
//---------------------end TIMER0 template------------------------------------
	T1TCR  = 0x00;		
//---------------------end TIMER0 template------------------------------------
}
//========================================sendbyte==============================




//========================================sendstring============================
void UART3_SendStr (char *str)
{
	while (1)
	{
		if (*str == '\0')	break;		/* 遇到结束符，退出			*/
		UART1_SendByte(*str++);			/* 发送数据					*/
	}
}
//========================================sendstring============================
/**********************************UART send functions******************************************************/


//-------------------------------------end file----------------------------------