led.c

来自「一个小型的嵌入式操作系统内核,可用于多种硬件平台」· C语言 代码 · 共 76 行

/**************************************************************************************************
                                      EDL RTOS Kernel
                              (c) Copyright 2005, Wu Jun
                                    All Rights Reserved    
                For further information, please visit http://www.enjoydigitallife.com

* Description:      None
* History:          
    Date                         Remarks
    2005-01-06                   Created initial version
    2005-12-12                   Finished the version 2.01
**************************************************************************************************/


#include "datatype.h"
#include "44b.h"
#include "led.h"




/**************************************************************************************************
* Description: Initialize
**************************************************************************************************/
void led_init(void)
{
    /* Do nothing here */
   
}





/**************************************************************************************************
* Description:      show the 8-bit data in LED indicator.     
* Parametters:      c       the 8-bit data to be displayed in led indicator. e.g. if c = 0x01, then
                            the LED indicator will be lit as 00000001. 
**************************************************************************************************/
void  led_dispChar(U8 c)
{  
	if((c & 0x01)==0x01)		//D3
		rPDATC = rPDATC | (1<<1) ;
	else
		rPDATC = rPDATC & (~(1<<1)) ;
	
	if(( c & 0x02)==0x02)		//D4
		rPDATC = rPDATC | (1<<2) ;
	else
		rPDATC = rPDATC & (~(1<<2)) ;

	if(( c & 0x04)==0x04)		//D5
		rPDATC = rPDATC | (1<<3) ;
	else
		rPDATC = rPDATC & (~(1<<3)) ;

	if(( c & 0x08)==0x08)		//D6
		rPDATE = rPDATE | (1<<5) ;
	else
		rPDATE = rPDATE & (~(1<<5)) ;
}


/**************************************************************************************************
* Description:      delay
* Parametters:      times       specifies the cycle number
**************************************************************************************************/
void  led_delay(U32 times)
{  
    U32 i;
    for(i = 0; i < times; i++)			
    {  
        /* we do nothing here, just loop */
    }
}