Форум РадиоКот

Код: Выделить всё

#include <stdio.h>

#include <stdint.h>

#define CHAR_CNT    14
#define POS_CNT     5
#define IND_RPT     63

#define CHAR_0      0x000
#define CHAR_1      0x111
#define CHAR_2      0x222
#define CHAR_3      0x333
#define CHAR_4      0x444
#define CHAR_5      0x555
#define CHAR_6      0x666
#define CHAR_7      0x777
#define CHAR_8      0x888
#define CHAR_9      0x999
#define CHAR_PU     0xaaa
#define CHAR_PD     0xbbb
#define CHAR_PB     0xccc
#define CHAR_SP     0xddd

static const uint16_t digs[CHAR_CNT] = {
   CHAR_0, CHAR_1, CHAR_2, CHAR_3, CHAR_4,
   CHAR_5, CHAR_6, CHAR_7, CHAR_8, CHAR_9,
   CHAR_PU, CHAR_PD, CHAR_PB, CHAR_SP
};

/// структура знакоместа
typedef struct {
   volatile uint8_t   bright;   //!< заданная яркость
   volatile char      symbol[2]; //!< коды знака
} pos_t;

// структура для управления индикаторами через регистры 74HC595
typedef union {
   struct {
      uint16_t   symbol : 11;      // код символа
      uint8_t      anode : POS_CNT;   // бит разряда
   };
   uint8_t         bytes[2];         // 2 байта для выдачи в регистры
   uint16_t      word;
} regs_t;

pos_t screen[POS_CNT];

void ISR(){
   static uint8_t entry;
   static uint8_t anode = 0x08;
   uint16_t word;
   static pos_t *scr = screen;

   word = digs[scr->symbol[entry >= scr->bright]];
   if(entry < 50)
      word |= anode << 8;

   if(++entry >= IND_RPT){
      entry = 0;
      scr++;
      anode <<= 1;
      if(anode == 0){
         anode = 0x08;
         scr = screen;
      }
   }

   printf("entry=%2d: word=%04x\n", entry, word);
}


int main()
{
    screen[0].symbol[0] = 1;
    screen[0].symbol[1] = 2;
    screen[0].bright = 4;
    screen[1].symbol[0] = 3;
    screen[1].symbol[1] = 4;
    screen[1].bright = 3;
    screen[2].symbol[0] = 5;
    screen[2].symbol[1] = 6;
    screen[2].bright = 2;
    screen[3].symbol[0] = 7;
    screen[3].symbol[1] = 8;
    screen[3].bright = 1;
    screen[4].symbol[0] = 9;
    screen[4].symbol[1] = 10;
    screen[4].bright = 2;


    for (int i = 0; i < 1000; i++) {
        ISR();
    }

    return 0;
}

Код: Выделить всё

entry= 1: word=0911
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