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https://github.com/apache/nuttx-apps.git
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3638f1c3fa
This provides an adaptor for using lvgl with the lcddev in addition to the fbdev. As part of this it also fixes a compilation error when fbdev was used with CONFIG_FB_UPDATE. There is also a monitoring callback enabled for monitoring the performance of the demo.
332 lines
9.1 KiB
C
332 lines
9.1 KiB
C
/****************************************************************************
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* apps/examples/lvgldemo/fbdev.c
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gábor Kiss-Vámosi <kisvegabor@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "fbdev.h"
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#include <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/video/fb.h>
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#include <nuttx/video/rgbcolors.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef FBDEV_PATH
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# define FBDEV_PATH "/dev/fb0"
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#endif
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct fb_state_s
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{
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int fd;
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struct fb_videoinfo_s vinfo;
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struct fb_planeinfo_s pinfo;
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FAR void *fbmem;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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struct fb_state_s state;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fbdev_flush
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*
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* Description:
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* Flush a buffer to the marked area
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*
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* Input Parameters:
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* x1 - Left coordinate
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* y1 - Top coordinate
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* x2 - Right coordinate
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* y2 - Bottom coordinate
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* color_p - A n array of colors
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void fbdev_flush(struct _disp_drv_t *disp_drv, const lv_area_t *area,
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lv_color_t *color_p)
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{
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#ifdef CONFIG_FB_UPDATE
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struct fb_area_s fb_area;
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#endif
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int32_t x1 = area->x1;
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int32_t y1 = area->y1;
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int32_t x2 = area->x2;
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int32_t y2 = area->y2;
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int32_t act_x1;
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int32_t act_y1;
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int32_t act_x2;
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int32_t act_y2;
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long int location = 0;
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if (state.fbmem == NULL)
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{
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return;
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}
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/* Return if the area is out the screen */
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if (x2 < 0)
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{
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return;
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}
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if (y2 < 0)
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{
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return;
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}
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if (x1 > state.vinfo.xres - 1)
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{
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return;
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}
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if (y1 > state.vinfo.yres - 1)
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{
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return;
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}
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/* Truncate the area to the screen */
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act_x1 = x1 < 0 ? 0 : x1;
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act_y1 = y1 < 0 ? 0 : y1;
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act_x2 = x2 > state.vinfo.xres - 1 ? state.vinfo.xres - 1 : x2;
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act_y2 = y2 > state.vinfo.yres - 1 ? state.vinfo.yres - 1 : y2;
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if (state.pinfo.bpp == 8)
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{
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uint8_t *fbp8 = (uint8_t *)state.fbmem;
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uint32_t x;
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uint32_t y;
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for (y = act_y1; y <= act_y2; y++)
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{
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for (x = act_x1; x <= act_x2; x++)
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{
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location = x + (y * state.vinfo.xres);
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fbp8[location] = color_p->full;
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color_p++;
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}
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color_p += x2 - act_x2;
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}
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}
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if (state.pinfo.bpp == 16)
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{
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uint16_t *fbp16 = (uint16_t *)state.fbmem;
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uint32_t x;
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uint32_t y;
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for (y = act_y1; y <= act_y2; y++)
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{
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for (x = act_x1; x <= act_x2; x++)
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{
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location = x + (y * state.vinfo.xres);
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fbp16[location] = color_p->full;
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color_p++;
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}
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color_p += x2 - act_x2;
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}
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}
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if (state.pinfo.bpp == 24 || state.pinfo.bpp == 32)
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{
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uint32_t *fbp32 = (uint32_t *)state.fbmem;
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uint32_t x;
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uint32_t y;
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for (y = act_y1; y <= act_y2; y++)
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{
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for (x = act_x1; x <= act_x2; x++)
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{
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location = x + (y * state.vinfo.xres);
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fbp32[location] = color_p->full;
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color_p++;
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}
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color_p += x2 - act_x2;
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}
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}
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#ifdef CONFIG_FB_UPDATE
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fb_area.x = act_x1;
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fb_area.y = act_y1;
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fb_area.w = act_x2 - act_x1 + 1;
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fb_area.h = act_y2 - act_y1 + 1;
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ioctl(state.fd, FBIO_UPDATE, (unsigned long)((uintptr_t)&fb_area));
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#endif
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/* Tell the flushing is ready */
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lv_disp_flush_ready(disp_drv);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fbdev_init
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*
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* Description:
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*
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* Input Parameters:
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* lv_drvr -- LVGL driver interface
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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int fbdev_init(lv_disp_drv_t *lv_drvr)
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{
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FAR const char *fbdev = "/dev/fb0";
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int ret;
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/* Open the framebuffer driver */
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state.fd = open(fbdev, O_RDWR);
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if (state.fd < 0)
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{
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int errcode = errno;
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gerr("ERROR: Failed to open %s: %d\n", fbdev, errcode);
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return EXIT_FAILURE;
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}
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/* Get the characteristics of the framebuffer */
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ret = ioctl(state.fd, FBIOGET_VIDEOINFO,
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(unsigned long)((uintptr_t)&state.vinfo));
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if (ret < 0)
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{
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int errcode = errno;
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gerr("ERROR: ioctl(FBIOGET_VIDEOINFO) failed: %d\n", errcode);
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close(state.fd);
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state.fd = -1;
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return EXIT_FAILURE;
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}
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ginfo("VideoInfo:\n\tfmt: %u\n\txres: %u\n\tyres: %u\n\tnplanes: %u\n",
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state.vinfo.fmt, state.vinfo.xres, state.vinfo.yres,
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state.vinfo.nplanes);
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ret = ioctl(state.fd, FBIOGET_PLANEINFO,
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(unsigned long)((uintptr_t)&state.pinfo));
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if (ret < 0)
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{
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int errcode = errno;
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gerr("ERROR: ioctl(FBIOGET_PLANEINFO) failed: %d\n", errcode);
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close(state.fd);
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state.fd = -1;
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return EXIT_FAILURE;
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}
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ginfo("PlaneInfo (plane 0):\n"
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"\tfbmem: %p\n\tfblen: %l\n\tstride: %u\n"
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"\tdisplay: %u\n\tbpp: %u\n\t",
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state.pinfo.fbmem, (unsigned long)state.pinfo.fblen,
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state.pinfo.stride, state.pinfo.display, state.pinfo.bpp);
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lv_drvr->hor_res = state.vinfo.xres;
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lv_drvr->ver_res = state.vinfo.yres;
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lv_drvr->flush_cb = fbdev_flush;
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/* Only these pixel depths are supported. viinfo.fmt is ignored, only
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* certain color formats are supported.
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*/
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if (state.pinfo.bpp != 32 && state.pinfo.bpp != 16 &&
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state.pinfo.bpp != 8 && state.pinfo.bpp != 1)
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{
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gerr("ERROR: bpp=%u not supported\n", state.pinfo.bpp);
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close(state.fd);
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state.fd = -1;
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return EXIT_FAILURE;
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}
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/* mmap() the framebuffer.
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*
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* NOTE: In the FLAT build the frame buffer address returned by the
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* FBIOGET_PLANEINFO IOCTL command will be the same as the framebuffer
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* address. mmap(), however, is the preferred way to get the framebuffer
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* address because in the KERNEL build, it will perform the necessary
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* address mapping to make the memory accessible to the application.
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*/
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state.fbmem = mmap(NULL, state.pinfo.fblen, PROT_READ | PROT_WRITE,
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MAP_SHARED | MAP_FILE, state.fd, 0);
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if (state.fbmem == MAP_FAILED)
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{
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int errcode = errno;
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gerr("ERROR: ioctl(FBIOGET_PLANEINFO) failed: %d\n",
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errcode);
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close(state.fd);
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state.fd = -1;
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return EXIT_FAILURE;
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}
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ginfo("Mapped FB: %p\n", state.fbmem);
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return EXIT_SUCCESS;
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}
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