xin hỏi ý tưởng viết code này

**tdm** · 15-08-2011, 01:35 PM

Trích:

Nguyên văn bởi levuphuong

Code:

#include <16F877A.h>
#fuses NOWDT,PUT,XT,NOPROTECT
#use delay(clock=4000000)
#use fast_io(b)
#byte portb=0x06
#byte intcon=0x000B
#bit RB4=portb.4
#bit RB5=portb.5
#bit RBIF=intcon.0 //dinh nghia co ngat RB
#bit RBIE=intcon.3 //dinh nghia bit cho phep ngat RB
int8 a=0;
int8 bien;
const unsigned char ma_ledthuan[]= {
0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,
0x81,0x82,0x84,0x88,0x90,0xA0,0xC0,0xC1,
0xC2,0xC4,0xC8,0xD0,0xE0,0xE1,0xE2,0xE4,
0xE8,0xF0,0xF1,0xF2,0xF4,0xF8,0xF9,0xFA,
0xFC,0xFD,0xFE,0xFF,0x00};
const unsigned char ma_lednguoc[]= {
0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,
0x81,0x41,0x21,0x11,0x09,0x05,0x03,0x83,
0x43,0x23,0x13,0x0b,0x07,0x87,0x47,0x27,
0x17,0x0f,0x8f,0x4f,0x2f,0x1f,0x9f,0x5f,
0x3f,0xbf,0x7f,0xFF,0x00};

// Chuong trinh ngat
#int_RB
void ngat_RB()
{
if((RBIF)&&(RBIE))
  {
      //Kiem tra sw1
      {
      if(RB4==1)
        {
        a++ ;
            // thêm delay_ms(10) thì nó không chạy dc
      }
      //Kiem tra sw2
      
  RBIF=0; //Xoa co ngat RB
  }
}
}
// Chuong trinh chinh
void main()
{
set_tris_b(0b11110000);
portb=0b11110000;
enable_interrupts(global);
enable_interrupts(int_RB);
ext_int_edge(H_to_L);
while(true)
  {
  if(a%2==0)
  {
  for(bien=0;bien<=36;bien++)
{
if(a%2==1)
bien=37;
output_d(ma_ledthuan[bien]);
Delay_ms(200);
}
  }
  else
  {
for(bien=0;bien<=36;bien++)
{
if(a%2==0)
bien=37;
output_d(ma_lednguoc[bien]) ;
delay_ms(200) ;

}
  }
}
}

mình đã sửa lại và chạy rồi nhưng khi nhấn 5 cái có 1 cái hok ăn.xem trên diễn đàn th2i là do hiện tuong rung phím.Mình thử thêm delay vào ben trong ngắt .sau dò phím thì nó lại bi warning và code hok chạy luôn
Nó báo sẽ không ngắt khi chay hàm delay_ms
Các bác giúp em với

vẫn chạy bt,mô phỏng proteus không cần chống rung .nhấn phím thì giữ một chút nhé .

Code:

#include <16F877A.h>
#fuses NOWDT,PUT,XT,NOPROTECT
#use delay(clock=4000000)
#use fast_io(b)
#byte portb=0x06
#byte intcon=0x000B
#bit RB4=portb.4
#bit RB5=portb.5
#bit RBIF=intcon.0 //dinh nghia co ngat RB
#bit RBIE=intcon.3 //dinh nghia bit cho phep ngat RB
int8 a=0;
int8 bien;
const unsigned char ma_ledthuan[]= {
0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,
0x81,0x82,0x84,0x88,0x90,0xA0,0xC0,0xC1,
0xC2,0xC4,0xC8,0xD0,0xE0,0xE1,0xE2,0xE4,
0xE8,0xF0,0xF1,0xF2,0xF4,0xF8,0xF9,0xFA,
0xFC,0xFD,0xFE,0xFF,0x00};
const unsigned char ma_lednguoc[]= {
0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,
0x81,0x41,0x21,0x11,0x09,0x05,0x03,0x83,
0x43,0x23,0x13,0x0b,0x07,0x87,0x47,0x27,
0x17,0x0f,0x8f,0x4f,0x2f,0x1f,0x9f,0x5f,
0x3f,0xbf,0x7f,0xFF,0x00};

// Chuong trinh ngat
#int_RB
void ngat_RB()
{
if((RBIF)&&(RBIE))
  {

      if(RB4==1)
        {
        
        a++ ;
      delay_ms(10) ;//thi? no? không cha?y dc
      }
}
}
// Chuong trinh chinh
void main()
{
set_tris_b(0b11110000);
portb=0b11110000;
enable_interrupts(global);
enable_interrupts(int_RB);
ext_int_edge(H_to_L);
while(true)
  {
  if(a%2==0)
  {
  for(bien=0;bien<=36;bien++)
{
if(a%2==1)
bien=37;
output_d(ma_ledthuan[bien]);
Delay_ms(200);
}
  }
  else
  {
for(bien=0;bien<=36;bien++)
{
if(a%2==0)
bien=37;
output_d(ma_lednguoc[bien]) ;
delay_ms(200) ;

}
  }
}
}