#include <iom8515v.h>
#include <macros.h>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long
void port_init(void)
{
PORTA = 0x00;
DDRA = 0xFF;
PORTB = 0x04;
DDRB = 0x00;
PORTC = 0xC8;
DDRC = 0x18;
PORTD = 0x00;
DDRD = 0x00;
PORTE = 0x00;
DDRE = 0x00;
OSCCAL= 0XA7;
SFIOR&=~BIT(2);
//SFIOR&=~BIT(PUD);
}
void mDelay(uint Delay)
{ uint K;
for(;Delay>0;Delay--)
{ for(K=0;K<900;K++)
{;}
}
}
//call this routine to initialize all
peripherals
void init_devices(void)
{
//stop errant interrupts until set up
CLI(); //disable all interrupts
port_init();
MCUCR = 0x00;
EMCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00;
SEI(); //re-enable interrupts
//all peripherals are now initialized
}
//
void main(void)
{
uint i=0;
init_devices();
//insert your functional code here...
CLI();
while(1)
{
if((PINB&0x04)==0)
{mDelay(10); //消除按键抖动
if ((PINB&0x40)==0)
{
PORTA=i++;
if(i>0xff) i=0;
}
}
}
}
目的是PB2的按键使PORTA的数据递增,问题是按
键下去没反映,while(1)中换成
while(1)
{
if((PINB&0x04)==0)
{//mDelay(10); //消除按键抖
动
//if ((PINB&0x40)==0)
{
PORTA=i++;
if(i>0xff) i=0;
}
}
}
就可以响应按键,难道中间的消除按键抖动不能
用?
刚学习AVR还请做过的人指教,谢谢!
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