led.c

AVR单片机C语言程序设计实例精粹

//***************************************************************
// File Name : LED.c
// Author    : Steaven
// Created   : 2008-07-26
// Modified  : 
// Revision  : V0.0
//***************************************************************

#include "iom16v.h" 
#include "DataType.h"
#include "app.h"
#include "LED.h"

//constant definition
const INT8U Char_I[] = {0x00,0x00,0x82,0xFE,0x82,0x00,0x00,0x00};/*"I",0*/
const INT8U Char_L[] = {0x00,0x00,0xFE,0x02,0x02,0x02,0x00,0x00};/*"L",0*/
const INT8U Char_V[] = {0x00,0xF0,0x08,0x04,0x04,0x08,0xF0,0x00};/*"V",0*/
const INT8U Char_E[] = {0x00,0x00,0xFE,0x92,0x92,0x82,0x00,0x00};/*"E",0*/
const INT8U Char_Y[] = {0x00,0xC0,0x20,0x1E,0x20,0xC0,0x00,0x00};/*"Y",0*/
const INT8U Char_O[] = {0x00,0x00,0xFE,0x82,0x82,0xFE,0x00,0x00};/*"O",0*/
const INT8U Char_U[] = {0x00,0x00,0xFC,0x02,0x02,0xFC,0x00,0x00};/*"U",0*/
const INT8U Space[]  = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};/*" ",0*/

//struct definition
struct DataBaseIndex
{
	INT8U Code;
    const INT8U *Ptr;
};

//char code database list
const struct DataBaseIndex DataBaseIndexList[] = 
{
	'I', Char_I,
	'L', Char_L,
	'O', Char_O,
	'V', Char_V,
	'E', Char_E,
	'Y', Char_Y,
	'U', Char_U,
	 0 , 0
};

//global variables definition
const INT8U *pBufStr;                  //字符指针
const char String1[] = {"ILOVEYOU"};   //字符串
INT8U DisplayCnt;                      //显示计数器
INT8U Buffer[8];                       //显示缓冲区
INT8U Length_of_DataBase;              //字符数据库长度

//***************************************************************
// Function    : Display_Init
// Input       : none
// Output      : none
// Description : Display Initialization
//***************************************************************
void Display_Init(void)
{
    INT8U Index = 0;
	for(Index = 0;Index < 8;Index++)
	{
		Buffer[Index] = 0;
	}
	pBufStr = String1;
	DisplayCnt = 0;
	Length_of_DataBase = Search_DataBase_Length();
}

//***************************************************************
// Function    : DotTest
// Input       : none
// Output      : none
// Description : LED Display Test
//***************************************************************			  		       
void Buffer_IN(INT8U Index)
{
    const INT8U *pdata;
		INT8U Count = 0;
		pdata = SearchCharIndex(*pBufStr);
		if(pdata != (INT8U *)0)
		{
		    for(Count = 0;Count < 7;Count++)
			{
			    Buffer[Count] = Buffer[Count+1];
			}
			Buffer[7] = *(pdata + Index);
		}
}

//***************************************************************
// Function    : SearchCharIndex
// Input       : CharCode - Char to be displayed
// Output      : Pointer to the display code of the input char
// Description : Get the pointer of the display char code
//***************************************************************			  		       	
const INT8U *SearchCharIndex(INT8U CharCode)
{
    INT8U Index;
	const struct DataBaseIndex *pDataBasePtr;
	pDataBasePtr = DataBaseIndexList;
	for(Index = 0;Index <= Length_of_DataBase;Index++)
	{
	    if(pDataBasePtr->Code == CharCode)
		{
		    return(pDataBasePtr->Ptr);
		}
		else
		{
		    pDataBasePtr++ ;
		}
	}
	return(0);
}

//***************************************************************
// Function    : Search_DataBase_Length
// Input       : none
// Output      : Length of database list
// Description : Search DataBase Length
//***************************************************************			  
INT8U Search_DataBase_Length(void)
{
	INT8U Index = 0;
	const struct DataBaseIndex *pDataBasePtr;
	pDataBasePtr = DataBaseIndexList;
	while(pDataBasePtr->Code != 0)
	{
		Index++;
		pDataBasePtr++;
	}
	return(Index);
}

//***************************************************************
// Function    : DotTest
// Input       : none
// Output      : none
// Description : LED Display Test
//***************************************************************			  
void DotTest(void)
{
    INT8U Select = 0;
	INT8U Index = 0;
	INT32U wDelayCnt = 0;
	for(Select = 0;Select < 8;Select++)
	{
	    for(Index = 0;Index < 8;Index++)
		{
		    PORTA = 1 << Index;
		    PORTD = ~(1 << Select);
		    for(wDelayCnt = 0;wDelayCnt < 90000;wDelayCnt++) {;}
		}
	}
}

//=========================END OF FILE=========================//