git.gag.com Git - fw/altos/blob - src/stm-vga/ao_demo.c

   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include "ao.h"
  20 #include <ao_exti.h>
  21 #include <ao_event.h>
  22 #include <ao_quadrature.h>
  23 #include <ao_button.h>
  24 #include <ao_boot.h>
  25 #include <ao_vga.h>
  26
  27 struct ao_task ball_task;
  28
  29 #define BALL_WIDTH      5
  30 #define BALL_HEIGHT     5
  31
  32 static int      ball_x;
  33 static int      ball_y;
  34 static int      ball_dx, ball_dy;
  35
  36 uint8_t         ball_enable;
  37
  38 void
  39 ao_ball(void)
  40 {
  41         ball_dx = 1;
  42         ball_dy = 1;
  43         ball_x = 0;
  44         ball_y = 0;
  45         for (;;) {
  46                 while (!ball_enable)
  47                         ao_sleep(&ball_enable);
  48                 for (;;) {
  49                         ao_solid(AO_ALLONES,
  50                                  AO_ALLONES,
  51                                  ao_vga_fb + ball_y * AO_VGA_STRIDE,
  52                                  AO_VGA_STRIDE,
  53                                  ball_x,
  54                                  BALL_WIDTH,
  55                                  BALL_HEIGHT);
  56                         ao_delay(AO_MS_TO_TICKS(10));
  57                         ao_solid(AO_ALLONES,
  58                                  AO_ALLONES,
  59                                  ao_vga_fb + ball_y * AO_VGA_STRIDE,
  60                                  AO_VGA_STRIDE,
  61                                  ball_x,
  62                                  BALL_WIDTH,
  63                                  BALL_HEIGHT);
  64                         if (!ball_enable)
  65                                 break;
  66                         ball_x += ball_dx;
  67                         ball_y += ball_dy;
  68                         if (ball_x + BALL_WIDTH > AO_VGA_WIDTH) {
  69                                 ball_x = AO_VGA_WIDTH - BALL_WIDTH;
  70                                 ball_dx = -ball_dx;
  71                         }
  72                         if (ball_x < 0) {
  73                                 ball_x = -ball_x;
  74                                 ball_dx = -ball_dx;
  75                         }
  76                         if (ball_y + BALL_HEIGHT > AO_VGA_HEIGHT) {
  77                                 ball_y = AO_VGA_HEIGHT - BALL_HEIGHT;
  78                                 ball_dy = -ball_dy;
  79                         }
  80                         if (ball_y < 0) {
  81                                 ball_y = -ball_y;
  82                                 ball_dy = -ball_dy;
  83                         }
  84                 }
  85         }
  86 }
  87
  88 static void
  89 ao_video_toggle(void)
  90 {
  91         ao_cmd_decimal();
  92         ao_vga_enable(ao_cmd_lex_i);
  93 }
  94
  95 static void
  96 ao_ball_toggle(void)
  97 {
  98         ao_cmd_decimal();
  99         ball_enable = ao_cmd_lex_i;
 100         ao_wakeup(&ball_enable);
 101 }
 102
 103 __code struct ao_cmds ao_demo_cmds[] = {
 104         { ao_video_toggle, "V\0Toggle video" },
 105         { ao_ball_toggle, "B\0Toggle ball" },
 106         { 0, NULL }
 107 };
 108
 109 int
 110 main(void)
 111 {
 112         ao_clock_init();
 113
 114         ao_task_init();
 115
 116         ao_led_init(LEDS_AVAILABLE);
 117         ao_led_on(AO_LED_GREEN);
 118         ao_led_off(AO_LED_BLUE);
 119         ao_timer_init();
 120         ao_dma_init();
 121         ao_cmd_init();
 122         ao_vga_init();
 123         ao_usb_init();
 124
 125         ao_add_task(&ball_task, ao_ball, "ball");
 126         ao_cmd_register(&ao_demo_cmds[0]);
 127
 128         ao_start_scheduler();
 129         return 0;
 130 }