1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/epaper.c Mon May 27 22:33:28 2013 +0000
1.3 @@ -0,0 +1,177 @@
1.4 +/*
1.5 + * Ben NanoNote and EM027AS012 E-Paper Display Adapter Board communication.
1.6 + *
1.7 + * Copyright (C) 2013 Paul Boddie
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or modify it under
1.10 + * the terms of the GNU General Public License as published by the Free Software
1.11 + * Foundation; either version 3 of the License, or (at your option) any later
1.12 + * version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.16 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.17 + * details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License along with
1.20 + * this program. If not, see <http://www.gnu.org/licenses/>.
1.21 + */
1.22 +
1.23 +#include <ubb/ubb.h>
1.24 +#include <stdio.h>
1.25 +#include <stdlib.h>
1.26 +#include <string.h>
1.27 +#include <ctype.h>
1.28 +#include <signal.h>
1.29 +#include <unistd.h>
1.30 +#include "images.h"
1.31 +#include "Display_Controller.h"
1.32 +#include "bsp.h"
1.33 +
1.34 +typedef enum {
1.35 + FALSE=0,
1.36 + TRUE=1
1.37 +} bool;
1.38 +
1.39 +/**
1.40 + * Handle termination of the process.
1.41 + */
1.42 +void shutdown(int signum)
1.43 +{
1.44 + printf("Closing...\n");
1.45 + ubb_close(0);
1.46 + exit(1);
1.47 +}
1.48 +
1.49 +/* Main program and basic initialisation. */
1.50 +
1.51 +int main(int argc, char *argv[])
1.52 +{
1.53 + uint8_t *current_image, *next_image, blank_image[176][33], image_number, arg;
1.54 + bool blank_screen, have_image;
1.55 + int delay;
1.56 +
1.57 + signal(SIGINT, &shutdown);
1.58 +
1.59 + if (ubb_open(0) < 0) {
1.60 + perror("ubb_open");
1.61 + return 1;
1.62 + }
1.63 +
1.64 + ubb_power(1);
1.65 + printf("Power on.\n");
1.66 +
1.67 + /* Need to initialise the board. */
1.68 +
1.69 + bsp_init();
1.70 + printf("Initialised.\n");
1.71 +
1.72 + /* Initialise an array containing the blank image. */
1.73 +
1.74 + memset((uint8_t*) &blank_image[0][0], 0xff, 176*33);
1.75 +
1.76 + /* Determine whether to blank the screen or leave an image on it. */
1.77 +
1.78 + if (argc < 2)
1.79 + {
1.80 + printf("Usage: %s ( --have <image number> | --blank | <image number> | --wait <delay in seconds>)...\n", argv[0]);
1.81 + ubb_close(0);
1.82 + return 1;
1.83 + }
1.84 +
1.85 + /* Assume a blank screen by default. */
1.86 +
1.87 + current_image = (uint8_t*) &blank_image[0][0];
1.88 +
1.89 + for (arg = 1; arg < argc; arg ++)
1.90 + {
1.91 + /* Wait for a specified delay. */
1.92 +
1.93 + if (strcmp(argv[arg], "--wait") == 0)
1.94 + {
1.95 + arg++;
1.96 +
1.97 + if (!isdigit(argv[arg][0]))
1.98 + {
1.99 + printf("Expected an delay in seconds instead of %s.\n", argv[arg]);
1.100 + ubb_close(0);
1.101 + return 1;
1.102 + }
1.103 +
1.104 + delay = atoi(argv[arg]);
1.105 + printf("Waiting for %d seconds...\n", delay);
1.106 + sleep(delay);
1.107 + continue;
1.108 + }
1.109 +
1.110 + /* Indicate an image presumably on screen already. */
1.111 +
1.112 + have_image = strcmp(argv[arg], "--have") == 0;
1.113 + blank_screen = strcmp(argv[arg], "--blank") == 0;
1.114 +
1.115 + if (have_image)
1.116 + arg++;
1.117 +
1.118 + /* If a blank screen operation is not requested, find the image
1.119 + specified. */
1.120 +
1.121 + if (!blank_screen)
1.122 + {
1.123 + if (!isdigit(argv[arg][0]))
1.124 + {
1.125 + printf("Expected an image number instead of %s.\n", argv[arg]);
1.126 + ubb_close(0);
1.127 + return 1;
1.128 + }
1.129 +
1.130 + image_number = atoi(argv[arg]);
1.131 +
1.132 + if (image_number > MAX_IMAGE)
1.133 + {
1.134 + printf("Image number cannot be greater than %d.\n", MAX_IMAGE);
1.135 + ubb_close(0);
1.136 + return 1;
1.137 + }
1.138 +
1.139 + /* If just specifying the current image, start the next iteration
1.140 + expecting an image to replace the current image. */
1.141 +
1.142 + if (have_image)
1.143 + {
1.144 + current_image = (uint8_t *) &image_data[image_number][0][0];
1.145 + printf("Set current image as %d.\n", image_number);
1.146 + continue;
1.147 + }
1.148 +
1.149 + /* Otherwise, choose the replacement image. */
1.150 +
1.151 + else
1.152 + {
1.153 + next_image = (uint8_t *) &image_data[image_number][0][0];
1.154 + printf("Set next image as %d.\n", image_number);
1.155 + }
1.156 + }
1.157 +
1.158 + /* To blank the screen choose the blank image as the next image. */
1.159 +
1.160 + else
1.161 + {
1.162 + next_image = (uint8_t*) &blank_image[0][0];
1.163 + printf("Set blank image.\n");
1.164 + }
1.165 +
1.166 + /* Call epd_DisplayImg with the new image and current image. */
1.167 +
1.168 + epd_DisplayImg(DISPLAY_IN_USE, next_image, current_image);
1.169 + printf("Updated image.\n");
1.170 +
1.171 + current_image = next_image;
1.172 + }
1.173 +
1.174 + /* Detach from the board. */
1.175 +
1.176 + printf("Closing...\n");
1.177 + ubb_close(0);
1.178 +
1.179 + return 0;
1.180 +}