main.c

很好的键盘驱动程序

/********************************************
Chip type           : AT90S4434
Clock frequency     : 8,000000 MHz
Memory model        : Tiny
Internal SRAM size  : 256
External SRAM size  : 0
Data Stack size     : 64
*********************************************/

#include <90s4434.h>
#include "kb.h" 
#include <delay.h>   


// Alphanumeric LCD Module functions
#asm
   .equ __lcd_port=0x15
#endasm
#include <lcd.h>

// Declare your global variables here

void main(void)
{

// Declare your local variables here
    unsigned char key;

// Input/Output Ports initialization
// Port A
PORTA=0x00;
DDRA=0x00;

// Port B
PORTB=0x00;
DDRB=0x00;

// Port C
PORTC=0x00;
DDRC=0x00;

// Port D
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Output Compare
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer 1 Stopped
// Mode: Output Compare
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer 2 Stopped
// Mode: Output Compare
// OC2 output: Disconnected
TCCR2=0x00;
ASSR=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Oon
// INT1: Off 
GIMSK= 0x40;        // Enable INT0 interrupt
MCUCR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;

// LCD module initialization
//lcd_init(20);            // Init 20 Zeichendisplay
 lcd_init(16);         // Init 16 Zeichendisplay

 InitKeyBoard();               // Initialize keyboard reception
 
 while(1)
    {
        key = getchar_kb();
        lcd_putchar(key);
        delay_ms(5);   
      
    }

}