server/drivers/de200c-vfd/clients/vfdclock.c

   1 // ****************************************************************************
   2 //  vfdclock.c                     (C) 1992-2003 Christophe de Dinechin (ddd)
   3 //                                                            VFD800 project
   4 // ****************************************************************************
   5 //
   6 //   File Description:
   7 //
   8 //     Analog clock using the VFD800 server
   9 //
  10 //
  11 //
  12 //
  13 //
  14 //
  15 //
  16 //
  17 // ****************************************************************************
  18 // This document is confidential.
  19 // Do not redistribute without written permission
  20 // ****************************************************************************
  21 // * File       : $RCSFile$
  22 // * Revision   : $Revision$
  23 // * Date       : $Date$
  24 // ****************************************************************************
  25
  26 #include <math.h>
  27 #include <time.h>
  28
  29 #define VFDCLIENT               "vfdclock"
  30 #define VFDOPTIONS              "vfdclock.tbl"
  31 #define VFDCONFIG               "clock"
  32 #include "vfdclient.h"
  33
  34
  35 void RunClock(int vfd, char *config)
  36 // ----------------------------------------------------------------------------
  37 //   Loop, displaying the clock
  38 // ----------------------------------------------------------------------------
  39 {
  40      char line[256];
  41      vfd_configuration cfg;
  42      int x, y, w, h;
  43      int first = 1;
  44
  45      // Wait for the configuration to actually display something
  46      do
  47      {
  48           if (!first)
  49                sleep(1);
  50           first = 0;
  51           cfg = vfd_configure(vfd, config);
  52      } while (cfg.w < 10 || cfg.h < 10);
  53      x = cfg.x; y = cfg.y; w = cfg.w; h = cfg.h;
  54
  55      // Set mask to cover the clock itself
  56      vfd_select_mask(vfd);
  57      vfd_clear(vfd);
  58      vfd_fill_ellipse(vfd, x, y, w, h);
  59      vfd_select_display(vfd);
  60
  61      // Display inner circle
  62      w -= 2;
  63      h -= 2;
  64      x += 1;
  65      y += 1;
  66      vfd_ellipse(vfd, x, y, w, h);
  67
  68      while (1)
  69      {
  70           time_t t = time(NULL);
  71           struct tm *tm = localtime(&t);
  72
  73           int x0 = x + w/2;
  74           int y0 = y + h/2;
  75
  76           int wsec = w / 2.5 * sin(tm->tm_sec / 60.0 * M_PI * 2);
  77           int hsec = -h / 2.5 * cos(tm->tm_sec / 60.0 * M_PI * 2);
  78
  79           int wmin = w / 3.0 * sin(tm->tm_min / 60.0 * M_PI * 2);
  80           int hmin = -h / 3.0 * cos(tm->tm_min / 60.0 * M_PI * 2);
  81
  82           int whr = w / 3.5 * sin(tm->tm_hour / 12.0 * M_PI * 2);
  83           int hhr = -h / 3.5 * cos(tm->tm_hour / 12.0 * M_PI * 2);
  84
  85           // Draw the hands
  86           vfd_set_color(vfd, 1);
  87           vfd_line(vfd, x0, y0, whr, hhr);
  88           vfd_line(vfd, x0, y0, wmin, hmin);
  89           vfd_line(vfd, x0, y0, wsec, hsec);
  90           vfd_update(vfd);
  91
  92           // Print date, time
  93
  94           // Sleep
  95           usleep(1000000);
  96
  97           // Erase the hands (don't update to avoid blinking)
  98           vfd_set_color(vfd, 0);
  99           vfd_line(vfd, x0, y0, whr, hhr);
 100           vfd_line(vfd, x0, y0, wmin, hmin);
 101           vfd_line(vfd, x0, y0, wsec, hsec);
 102      }
 103 }
 104
 105
 106 int main(int argc, char *argv[])
 107 // ----------------------------------------------------------------------------
 108 //   Main entry point
 109 // ----------------------------------------------------------------------------
 110 {
 111     int vfd;
 112     vfd_options(argc, argv);
 113     vfd = vfd_open(server, port);
 114     RunClock(vfd, cfg);
 115     return 0;
 116 }
 117