code1.txt

来自「发送数据代码,大家可以参考一下的,不好的地方还请多多指教」· 文本 代码 · 共 62 行

BYTE KeyBaordSend(BYTE cSend)       
{
	BYTE ucData;
	BYTE i;
	BYTE ucPARITY;
       // EX1=0;          //disable interrupt
        mcuClrIntEn();		
	if (PC_Extern_KeyBoard() == 0x00)
	{
		MCU_INTENA1A &= 0xEF;
	}
		
	ucData = cSend;
	KBCLK=1;
	if(!KBCLK)			//if clk level is low,host disable data transmit,return 0
	{	
	      // EX1=1;  					//enable interrupt	
	  	return 0;
	 }	

           ucPARITY=Parity(ucData);//caculate the parity bit
	//start condition	
	    KBDATA=0; 
	    MCU_Delayxus(12); 		//delay 16 us
	    KBCLK=0;
           MCU_Delayxus(12); //delay 40 us
	//tramsmit 8 bit data
	    for(i=0;i<8;i++)			//send data LSB
	    {
	        KBCLK=1;
	        MCU_Delayxus(10); //delay 16 us
	        KBDATA=(ucData &0x01);
	        ucData =ucData >>1;
	        KBCLK=0;       
	        MCU_Delayxus(12); //delay 16 us			
	    }
	   //transmit EVEV/ODD parity	
	    KBCLK=1;
	    KBDATA=ucPARITY;		//send Even/ODD parity bit
	    MCU_Delayxus(12); //delay 16 us
	    KBCLK=0;
	    MCU_Delayxus(12); //delay 16 us
	  //stop condiction	
	    KBCLK=1;
	    KBDATA=1;     		//send stop bit
	    MCU_Delayxus(12); //delay 16 us
	    KBCLK=0;
	    MCU_Delayxus(12); //delay 60 us
    	    MCU_Delayxus(12); //delay 16 us
	    MCU_Delayxus(12); //delay 16 us
	    KBCLK=1;
	    MCU_Delayxus(12); //delay 16 us
	    //EX1=1;  					//enable interrupt	
	    mcuSetIntEn();
		
	if (PC_Extern_KeyBoard() == 0x00)
	{
		MCU_INTENA1A |= _BIT4;		// enable INT1.4 for external P06 INT	
	}
		
	    return 1;	
}