10. Cvičení

moving_square.c

/*******************************************************************
  Project main function template for MicroZed based MZ_APO board
  designed by Petr Porazil at PiKRON

  change_me.c      - main file

  include your name there and license for distribution.

  Remove next text: This line should not appear in submitted
  work and project name should be change to match real application.
  If this text is there I want 10 points subtracted from final
  evaluation.

 *******************************************************************/

#define _POSIX_C_SOURCE 200112L

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <time.h>
#include <unistd.h>
#include <termios.h>            //termios, TCSANOW, ECHO, ICANON

#include "mzapo_parlcd.h"
#include "mzapo_phys.h"
#include "mzapo_regs.h"

unsigned short *fb;

void draw_pixel(int x, int y, unsigned short color) {
  if (x>=0 && x<480 && y>=0 && y<320) {
    fb[x+480*y] = color;
  }
}


int main(int argc, char *argv[]) {
  unsigned char *parlcd_mem_base;
  int i,j,k;
  int ptr;
  unsigned int c;
  fb  = (unsigned short *)malloc(320*480*2);

  static struct termios oldt, newt;

 /*tcgetattr gets the parameters of the current terminal
     STDIN_FILENO will tell tcgetattr that it should write the settings
    of stdin to oldt*/
  tcgetattr( STDIN_FILENO, &oldt);
    /*now the settings will be copied*/
  newt = oldt;

    /*ICANON normally takes care that one line at a time will be processed
    that means it will return if it sees a "\n" or an EOF or an EOL*/
  newt.c_lflag &= ~(ICANON);
  newt.c_cc[VMIN] = 0; // bytes until read unblocks.
  newt.c_cc[VTIME] = 0;

    /*Those new settings will be set to STDIN
    TCSANOW tells tcsetattr to change attributes immediately. */
  tcsetattr( STDIN_FILENO, TCSANOW, &newt);

  printf("Hello world\n");

  parlcd_mem_base = map_phys_address(PARLCD_REG_BASE_PHYS, PARLCD_REG_SIZE, 0);

  if (parlcd_mem_base == NULL)
    exit(1);

  parlcd_hx8357_init(parlcd_mem_base);

  parlcd_write_cmd(parlcd_mem_base, 0x2c);
  ptr=0;
  for (i = 0; i < 320 ; i++) {
    for (j = 0; j < 480 ; j++) {
      c = 0;
      fb[ptr]=c;
      parlcd_write_data(parlcd_mem_base, fb[ptr++]);
    }
  }
  
  struct timespec loop_delay;
  loop_delay.tv_sec = 0;
  loop_delay.tv_nsec = 150 * 1000 * 1000;
  int xx=0, yy=0;
  char ch1=' ';
  for (k=0; k<1000; k++) {
    for (ptr = 0; ptr < 320*480 ; ptr++) {
        fb[ptr]=0u;
    }
    for (j=0; j<60; j++) {
      for (i=0; i<60; i++) {
        draw_pixel(i+xx,j+yy,0x7ff);
      }
    }
    
    int r = read(0, &ch1, 1);
    while (r==1) {
      if (ch1=='d') {
        xx+=20;
      } else if (ch1=='a') {
        xx-=20;
      } else if (ch1=='w') {
        yy-=20;
      } else if (ch1=='s') {
        yy+=20;
      } else if (ch1=='q') {
        k=2000;
      }
      r = read(0, &ch1, 1);
    }
    printf("Znak %c pozice %i ret %i\n", ch1, xx, r);
    
    parlcd_write_cmd(parlcd_mem_base, 0x2c);
    for (ptr = 0; ptr < 480*320 ; ptr++) {
        parlcd_write_data(parlcd_mem_base, fb[ptr]);
    }

    clock_nanosleep(CLOCK_MONOTONIC, 0, &loop_delay, NULL);
  }
  
  parlcd_write_cmd(parlcd_mem_base, 0x2c);
  for (ptr = 0; ptr < 480*320 ; ptr++) {
    parlcd_write_data(parlcd_mem_base, 0);
  }
   
  tcsetattr( STDIN_FILENO, TCSANOW, &oldt);  
   
  printf("Goodbye world\n");

  return 0;
}

• pro vyučující: cvičení 10