uart.c

这是基于TI公司的DSP TMS320DM642而开发的TCP/UDP协议

#include <csl.h>
#include "Tl16C752B.h"


static UartDelay(Uint32 Val)
{
    Uint32 i;
    for(i=0;i<Val;i++)
    {
    }
}

void UartAIRQClear()
{
    Uint32 i;
    i=TL16C752READ(TL16C752A_IIR_ADDR);
}

void UartBIRQClear()
{
    Uint32 i;
    i=TL16C752READ(TL16C752B_IIR_ADDR);
}

void UartInit(Uint32 Channel)
{
    int i;
    if(Channel==1)
    {
	     // Divisor latch and EFR enable
	     TL16C752WRITE( TL16C752B_LCR_ADDR, 0x80 ); 
	
	     // 设置波特率
	     // Baud Rate : 000c - 9600
	     TL16C752WRITE(	TL16C752B_DLL_ADDR, 0x78 );
	     TL16C752WRITE( TL16C752B_DLH_ADDR, 0x00 );
	
         // Divisor latch and EFR disable
         // 8bits data,1bit stop bit,no parity
         TL16C752WRITE( TL16C752B_LCR_ADDR, 0x03 );
         // 使能接收和发送中断
         TL16C752WRITE( TL16C752B_IER_ADDR, 0x03);
         // 设置FIFO控制寄存器
         // TX fifo trigger level 60 characters
         // Rx fifo trigger level 60 characters
         TL16C752WRITE( TL16C752B_FCR_ADDR, 0xf7 );      
         TL16C752WRITE( TL16C752B_MCR_ADDR, 0x08); 
         UartBIRQClear();
         
    }
    if(Channel==0)
    {
	     // Divisor latch and EFR enable
	     TL16C752WRITE( TL16C752A_LCR_ADDR, 0x80 ); 
	
	     // 设置波特率
	     // Baud Rate : 000c - 9600
	     TL16C752WRITE(TL16C752A_DLL_ADDR, 0x78 );
	     TL16C752WRITE( TL16C752A_DLH_ADDR, 0x00 );
	
         // Divisor latch and EFR disable
         // 8bits data,1bit stop bit,no parity
         TL16C752WRITE( TL16C752A_LCR_ADDR, 0x03 );
         // 使能接收和发送中断
         TL16C752WRITE( TL16C752A_IER_ADDR, 0x03);
         // 设置FIFO控制寄存器
         // TX fifo trigger level 60 characters
         // Rx fifo trigger level 60 characters
         TL16C752WRITE( TL16C752A_FCR_ADDR, 0xf7 );      
         TL16C752WRITE( TL16C752A_MCR_ADDR, 0x08);  
         UartAIRQClear();     
    }   
}

void UartASend(Uint8 *Data,Uint32 Len)
{    
     Uint32 i;
     for(;;)
     {
         if(Len==0)
         {
             break;
         }
         while(TL16C752READ(TL16C752A_LSR_ADDR)&0x20==0);    //TX FIFO is not empty;
         for(i=0;i<64;i++)
         {   
             if(Len==0)
             {
                 break;
             }
             TL16C752WRITE(TL16C752A_THR_ADDR,*Data);
             Data++;
             UartDelay(10);
             Len--;
         }
    }    
}

void UartBSend(Uint8 *Data,Uint32 Len)
{
     Uint32 i;
     for(;;)
     {
         if(Len==0)
         {
             break;
         }
         while(TL16C752READ(TL16C752B_LSR_ADDR)&0x20==0);    //TX FIFO is not empty;
         for(i=0;i<64;i++)
         {   
             if(Len==0)
             {
                 break;
             }
             TL16C752WRITE(TL16C752B_THR_ADDR,*Data);
             Data++;
             UartDelay(10);
             Len--;
         }
    }    
}   


Uint32 UartARecv(Uint8 *Data)
{    
     Uint32 i=0, j=0;
     j=TL16C752READ(TL16C752A_LSR_ADDR);
     while((j&0x01)==0x01)                         //RX FIFO has data;
     {
          *Data=TL16C752READ(TL16C752A_RHR_ADDR);
          Data++;
          i++;
          UartDelay(10);
          j=TL16C752READ(TL16C752A_LSR_ADDR);
     }
     return i;       
}


Uint32 UartBRecv(Uint8 *Data)
{    
     Uint32 i=0,j=0;
     j=TL16C752READ(TL16C752B_LSR_ADDR);
     while((j&0x01)==0x01)                         //RX FIFO has data;
     {
          *Data=TL16C752READ(TL16C752B_RHR_ADDR);
          Data++;
          i++;
          UartDelay(10);
          j=TL16C752READ(TL16C752B_LSR_ADDR);
     }
     return i;       
}