init0.h

LED灯显示在ARM9 2440中实现的LED宝马等

#define  BPS 115200

void dely(U32 tt)
{
   U32 i;
   for(;tt>0;tt--)
   {
     for(i=0;i<10000;i++){}
   }
}
//////////////////
void UART0_Seng(U16 date)
{

  rUTXH0 = date;

//while((rUTRSTAT0 & 0x1)==0x0);
}
////////////////
void UART0_rec(U16 date)
{

   date=rURXH0;
if(date==0x01)
{
     // rGPBDAT &= ~0X20;
      dely(500);
      //rGPBDAT |= 0x20;
}
while((rUTRSTAT0 & 0x1)==0x0);
}

//////////////////////
void UART0_SendStr(U8 const *str)
{
  while(1)
  {
    if(*str =='\0' ) break;
     UART0_Seng(*str++);
  }
  }
  ////////////////////////////////
  
  void uart0_init()
  {
  
    rGPHCON = ( rGPHCON & (~(0xffff)) ) | (0xaaa0);//
    //上拉电阻
    rGPHUP = 0x0;
    
    //设置串口线性控制器寄存器
    rULCON0 |=(0<<6)|(0<<5)|(0<<2)|(3<<0);
    
    //设置串口控制寄存器
    rUCON0 |=  (0<<10)//00 = PCLK
    		 |(1<<9)//Tx interrupt Type = Level
    		 |(1<<8)//Rx interrupt Type = Level
    		 |(0<<7)//Rx Timer out disable
    		 |(1<<6)//Rx error status interrupt enable
    		 |(0<<5)//Loopback mode disable     		 
    		 |(0<<4)//Send break signal disable
    		 |(1<<2)//Transmit mode (01 = inerrupt request or polling mode)
    		 |(1<<0);//Receive mode (01 = interupt request or polling mode)

	//设置串口FIFO控制寄存器
	rUFCON0 |=   (3<<6)//Tx FIFO Trigger Level(11 = 48-byte)
				|(3<<4)//Rx FIFO Trigger Level(11 = 32-byte)
				|(1<<2)//Tx FIFO reset
				|(1<<1)//Rx FIFO reset
				|(1<<0);//FIFO Eable
	//设置串口波特率分频寄存器
	rUBRDIV0 =(int) ( PCLK/(BPS*16) ) - 1;//PCLK, BPS	 
  }
  
  
  
  
  
  
  
  U8 Key_Scan( void )
{
    dely(50);
	if(      (rGPGDAT&(1<< 0)) == 0 )	return 0x01 ;
	else if( (rGPGDAT&(1<< 3)) == 0 )       return 2 ;
	else if( (rGPGDAT&(1<< 5)) == 0 )       return 3 ;
	else if( (rGPGDAT&(1<< 6)) == 0 )	return 4 ;
	else if( (rGPGDAT&(1<< 7)) == 0 )	return 5 ;
	else if( (rGPGDAT&(1<<11)) == 0 )	return 6 ;
	else
		return 0xff;

}