/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id: lcd-bitmap.c 29248 2011-02-08 20:05:25Z thomasjfox $ * * Copyright (C) 2011 Lorenzo Miori, Thomas Martitz * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include #include "string.h" #include #include #include #include "file.h" #include "debug.h" #include "system.h" #include "screendump.h" #include "lcd.h" static int dev_fd = 0; fb_data *dev_fb = 0; void lcd_shutdown(void) { printf("FB closed."); munmap(dev_fb, FRAMEBUFFER_SIZE); close(dev_fd); } void lcd_init_device(void) { size_t screensize; struct fb_var_screeninfo vinfo; struct fb_fix_screeninfo finfo; /* Open the framebuffer device */ dev_fd = open("/dev/fb0", O_RDWR); if (dev_fd == -1) { perror("Error: cannot open framebuffer device"); exit(1); } printf("The framebuffer device was opened successfully.\n"); /* Get the fixed properties */ if (ioctl(dev_fd, FBIOGET_FSCREENINFO, &finfo) == -1) { perror("Error reading fixed information"); exit(2); } /* Now we get the settable settings, and we set 16 bit bpp */ if (ioctl(dev_fd, FBIOGET_VSCREENINFO, &vinfo) == -1) { perror("Error reading variable information"); exit(3); } vinfo.bits_per_pixel = 16; if (ioctl(dev_fd, FBIOPUT_VSCREENINFO, &vinfo)) { perror("fbset(ioctl)"); exit(4); } printf("%dx%d, %dbpp\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel); /* Figure out the size of the screen in bytes */ screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8; if (screensize != FRAMEBUFFER_SIZE) { exit(4); perror("Display and framebuffer mismatch!\n"); } /* Map the device to memory */ dev_fb = mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0); if ((int)dev_fb == -1) { perror("Error: failed to map framebuffer device to memory"); exit(4); } printf("The framebuffer device was mapped to memory successfully.\n"); }