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标题: 用MPLAB对PIC16F84编程 [打印本页]

作者: winnie 时间: 2009-5-18 13:55
标题: 用MPLAB对PIC16F84编程
用MPLAB对PIC16F84编程，PORTA做开关，PORTB做LEDS，用开关控制灯的闪烁，PORTA和PORTB都用。一个简单的程序仅是供参考

/*----------------------------------------------------------------------
         This program is the demonstrate for PIC16C77 with picc16
   and ELSE conditional assembly block providing an alternative
   path of assembly code for the Microchip type.
         When the user uses which Microchip Microcontrol,he will
   define set of this Microchip type in the P16XX.EQU file. And he
   assemble source code of this type by the Microchip MPASM assem-
   bler. Exemple the chip type is PIC16C74, P74 must define as 1
   and the other types define as 0 in the P16XX.EQU file.It is the
   following:
-----------------------------------------------------------------------
*/
#include  <pic.h>
#include  "delay.h"
#define PORTBIT(adr, bit) ((unsigned)(&adr)*8+(bit))
static bit btnRtcc @ PORTBIT(PORTA,4);

void
DelayMs(unsigned char cnt)
{
#if XTAL_FREQ <= 2MHZ
do {
  DelayUs(996);
} while(--cnt);
#endif
#if XTAL_FREQ > 2MHZ
unsigned char i;
do {
  i = 4;
  do {
DelayUs(200);
  } while(--i);
} while(--cnt);
#endif
}

main(void)
{
unsigned char i,j;
static const unsigned char codeled[17] =
                  {0x21,0x7D,0x32,0x38,0x6c,0x0A8,0x0A0,0x3D,0x20,0x28,
                  0x24,0x0E0,0x0A3,0x70,0x0A2,0xA6,0x00};
static const unsigned char codeledE[17] =
                  {0x0,0x3,0x1,0x1,0x2,0x04,0x04,0x1,0x0,0x0,
                  0x0,0x06,0x04,0x3,0x04,0x4,0x00};

TRISA = 0x10; /* RA4=sw_RTCC input other bits output */
TRISB = 0x00; /* RB0=sw_INT input other bits output */
TRISC = 0; /* all bits output */
TRISD = 0;
TRISE = 0;
j = 0;
for(;;)
{
for(j=0;j<17;j++)
  {
  if(btnRtcc==0) break;
  PORTA = codeled[j];
  PORTB = codeled[j];
  PORTC = codeled[j];
  PORTD = codeled[j];
  PORTE = codeledE[j];
  DelayMs(200);  /* output value of j */
  }
  for(j=0;j<17;j++)
  {
   PORTA = codeled[j];
   PORTE=codeledE[j];
   DelayMs(500);
  }
  for(j=0;j<17;j++)
  {
   PORTB = codeled[j];
   DelayMs(500);
  }
  for(j=0;j<17;j++)
  {
   PORTC = codeled[j];
   DelayMs(500);
  }
  for(j=0;j<17;j++)
  {
   PORTD = codeled[j];
   DelayMs(500);
  }

}
}

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