segdisp-16sm.c

大量ATMEGA16实例, 都可以运行,包括驱动LCD1602, 上位机显示等多功能

/*
Title:	SegDisp-16sm.c
Connection:
	  Factory fixed setting:
	  PORTA:
	  		PA0-PA2 LCD control
			PA3-PA7 4x7-segment display control
			Drive LED group2 (the right group of LED)
	  PORTB:
	  		Shared by LCD and 4x7-segment displays
	  		output 8-bit data to LCD or 8-bit data to 4x7-segment displays
	  PORTC:
	        shared by 8-bit dipswitch and 4 x touch switches + 4 buttons
			receive inputs from dipswitch, touch switches and buttons 				
	  PORTD: 
	  		Drive LED group1 (the left group of LED) 
Attention:
	  1. J12 should be capped (connectted)
	  2. J5 is the Jump for LCD back light power 	  

Operation:
	  1. 4 x 7-segment displays show the inputs to PORTC in Binary
*/
   

#include <iom16v.h>
#include <macros.h>

unsigned char pattern[]={0x01, 0x03, 0x07, 0x0F, 0x1f, 0x3f, 0x7f, 0xff, 0x7f,
						 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
unsigned char rowused[]={0x01, 0x02, 0x10, 0x08, 0x04, 0x20, 0x40, 0x80};

const char dig0 = 0x40, dig1 = 0x80, dig2=0x10, dig3=0x08, dot=0x20;
char segconv[]={0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};
unsigned char BCD0, BCD1, BCD2, BCD3;
int count;

void port_init(void)
{
 DDRA  = 0xFF;		//set PortA output
 DDRB  = 0xff;		//set PORTB output
 DDRC  = 0x00;		//set PORTC output
 PORTC = 0xff;
 DDRD  = 0xFF;		//set PORTD output
}

void delay(int count)
{
 int i, j;
 for(i=count; i>0; i--)
    for(j=10; j>0; j--)
	   ;
} 
//*****************************************************************
void BinToBCD(int data)
{
 BCD0=0;
 BCD1=0;
 BCD2=0;
 BCD3=0;
 if(data>=10000)
    data=0;
 if(data>=1000)
    {
    BCD3=data/1000;
	data=data%1000;
	}	
 if(data>=100)
    {
    BCD2=data/100;
	data=data%100;
	}	
	
 if(data>=10)
    {
    BCD1=data/10;
	data=data%10;
	}		
 BCD0=data;	
}

void dispseg(void)
{
 PORTB=~segconv[BCD0];
 PORTA=dig0;
 delay(20);
 PORTB=~segconv[BCD1];
 PORTA=dig1;
 delay(20);
 PORTB=~segconv[BCD2];
 PORTA=dig2;
 delay(20);
 PORTB=~segconv[BCD3];
 PORTA=dig3;
 delay(20);
}

void dot_on(void)
{
 PORTB=~0x80;
 PORTA=dot; 
 delay(20);
}


//*****************************************************************
void main(void)
{
 unsigned char outa=0x00, outb=0x00, outc=0x00, outd=0x00;
 unsigned char dswin;  
 port_init();
 while(1)
   {
    WDR();				  //Watchdog reset
	dswin=PINC;
	BinToBCD(dswin);
	dispseg();
	dot_on();
	PORTD=0x55;
	delay(5);
   }
}