Форум РадиоКот

Код: Выделить всё

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <util/delay.h>

typedef struct{
   volatile uint8_t * port;
   uint8_t            and;
   uint8_t            or;
} seg_pin_t;

#define pn(p,b) {&PORT ## p, ~_BV(b), _BV(b)}

#define A   _BV(0)
#define B   _BV(1)
#define C   _BV(2)
#define D   _BV(3)
#define E   _BV(4)
#define F   _BV(5)
#define G   _BV(6)
#define H   _BV(7)

#define DIG0   (A+B+C+D+E+F)
#define DIG1   (B+C)
#define DIG2   (A+B+G+E+D)
#define DIG3   (A+B+C+D+G)
#define DIG4   (B+F+G+C)
#define DIG5   (A+F+G+C+D)
#define DIG6   (A+C+D+E+F+G)
#define DIG7   (A+B+C)
#define DIG8   (A+B+C+D+E+F+G)
#define DIG9   (A+B+C+D+F+G)

const __flash seg_pin_t pins[8] = {
  pn(B,0),
  pn(C,0),
  pn(D,0),
  pn(B,2),
  pn(C,2),
  pn(D,2),
  pn(B,4),
  pn(C,4)
};

const __flash seg_pin_t commons[4] = {
  pn(D,1),
  pn(D,4),
  pn(B,1),
  pn(C,1)
};

uint8_t scr[4] = {DIG5,DIG2,DIG3,DIG4};

ISR(TIMER0_OVF_vect){
   static uint8_t com;

   const __flash seg_pin_t *p = commons+com;

   *p->port &= p->and;

   if(++com >= 4) com = 0;

   uint8_t d = scr[com];
   d = ~d;

   p = pins;
   for(uint8_t i=0; i<8; i++, d>>=1){
      *p->port = (*p->port & p->and) | (d & 1 ? p->or : 0);
      p++;
   }

   p = commons+com;
   *p->port |= p->or;
}

int main(void){
   DDRB = 255;
   DDRC = 255;
   DDRD = 0x7F;
   PORTD = 0x80;

   TCCR0 = 4;
   TIMSK = _BV(TOIE0);
   sei();

   while(1);
}

Код: Выделить всё

AVR Memory Usage
----------------
Device: atmega16

Program:     432 bytes (2.6% Full)
(.text + .data + .bootloader)

Data:          5 bytes (0.5% Full)
(.data + .bss + .noinit)

Код: Выделить всё

#include <mega16.h>
// Declare your global variables here

#define uint8_t unsigned char

typedef struct {
   volatile uint8_t * port;
   uint8_t            and;
   uint8_t            or;
} seg_pin_t;

#define pn(p,b) {&PORT ## p, ~_BV(b), _BV(b)}

#define _BV(bit) (1 << (bit))

#define A   _BV(0)
#define B   _BV(1)
#define C   _BV(2)
#define D   _BV(3)
#define E   _BV(4)
#define F   _BV(5)
#define G   _BV(6)
#define H   _BV(7)

#define DIG0   (A+B+C+D+E+F)
#define DIG1   (B+C)
#define DIG2   (A+B+G+E+D)
#define DIG3   (A+B+C+D+G)
#define DIG4   (B+F+G+C)
#define DIG5   (A+F+G+C+D)
#define DIG6   (A+C+D+E+F+G)
#define DIG7   (A+B+C)
#define DIG8   (A+B+C+D+E+F+G)
#define DIG9   (A+B+C+D+F+G)

flash const seg_pin_t pins[8] = {
  pn(B,0),
  pn(C,0),
  pn(D,0),
  pn(B,2),
  pn(C,2),
  pn(D,2),
  pn(B,4),
  pn(C,4)
};

flash const seg_pin_t commons[4] = {
  pn(D,1),
  pn(D,4),
  pn(B,1),
  pn(C,1)
};

uint8_t scr[4] = {DIG5,DIG2,DIG3,DIG4};

// Timer 0 overflow interrupt service routine
interrupt [TIM0_OVF] void timer0_ovf_isr(void)
{  uint8_t d; uint8_t i;
   static uint8_t com;

   flash const seg_pin_t *p = commons+com;

   *p->port &= p->and;

   if(++com >= 4) com = 0;

   d = scr[com];
   d = ~d;

   p = pins;
   for(i=0; i<8; i++, d>>=1){
      *p->port = (*p->port & p->and) | (d & 1 ? p->or : 0);
      p++;
   }

   p = commons+com;
   *p->port |= p->or;
}


void main(void)
{
   DDRB = 255;
   DDRC = 255;
   DDRD = 0x7F;
   PORTD = 0x80;

   TCCR0 = 4;
   TIMSK = _BV(TOIE0);
   
   #asm("sei")

   while(1);
}

Код: Выделить всё

Program size: 254 words (508 bytes), 3,1% of FLASH
11 words (22 bytes), 4,2% reduced by Code Compression