原创 ATMEGA16外部中断应用

/*******************************************************
This program was created by the
CodeWizardAVR V3.12 Advanced
Automatic Program Generator
?Copyright 1998-2014 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com

Project : 
Version : 
Date    : 2024/6/6
Author  : 
Company : 
Comments: 


Chip type               : ATmega16
Program type            : Application
AVR Core Clock frequency: 8.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 256
*******************************************************/

#include 

#asm
.equ __lcd_port=0x15
#endasm
// Alphanumeric LCD functions
#include 
typedef unsigned char byte;
// Declare your global variables here
flash byte led_7[16]={0x3f,0x06,0x5b,0x4f,0x66,
                    0x6d,0x7d,0x07,0x7f,0x6f,0x77,
                    0x7c,0x39,0x5e,0x79,0x71};
byte counter;

interrupt [EXT_INT0] void ext_int0_isr(void)
{
    if(++counter>=16)counter=0;
}                    
interrupt [EXT_INT1] void ext_int1_isr(void)
{
    if(counter)--counter;
    else counter=15;
} 
void main(void)
{
// Declare your local variables here


// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTA Bit 0
// RD - PORTA Bit 1
// EN - PORTA Bit 2
// D4 - PORTA Bit 4
// D5 - PORTA Bit 5
// D6 - PORTA Bit 6
// D7 - PORTA Bit 7
// Characters/line: 8
PORTA=0xff;
DDRA=0XFF;
GICR|=0XC0;
MCUCR=0X0A;
GIFR=0XC0;
counter=0;
#asm("sei");
while (1)
      {
      // Place your code here
       PORTA=led_7[counter];
      }
}