嵌入式

嵌入式linux下去掉显示器上的光标

2019-07-12 16:35发布

站内文章 / 嵌入式Linux
10447 0 1474

1

当我们的应用界面的窗口的大小与LCD的大小一样的，如果不把光标去掉，那么会在左上角一个光标一直在闪烁，不好看。不过可以显示内核有没有宕机。一般情况下会去掉。

2

主要修改的文件： ./drivers/video/console/fbcon.c 把如下两个函数的实现注示掉就行了。 去掉光标显示 static void fb_flashcursor(struct work_struct *work) { #if 0 struct fb_info *info = container_of(work, struct fb_info, queue); struct fbcon_ops *ops = info->fbcon_par; struct vc_data *vc = NULL; int c; int mode; console_lock(); if (ops && ops->currcon != -1) vc = vc_cons[ops->currcon].d; if (!vc || !CON_IS_VISIBLE(vc) || registered_fb[con2fb_map[vc->vc_num]] != info || vc->vc_deccm != 1) { console_unlock(); return; } c = scr_readw((u16 *) vc->vc_pos); mode = (!ops->cursor_flash || ops->cursor_state.enable) ? CM_ERASE : CM_DRAW; ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1), get_color(vc, info, c, 0)); console_unlock(); #endif } 去掉光标闪烁 static void fbcon_cursor(struct vc_data *vc, int mode) { #if 0 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; struct fbcon_ops *ops = info->fbcon_par; int y; int c = scr_readw((u16 *) vc->vc_pos); if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) return; if (vc->vc_cursor_type & 0x10) fbcon_del_cursor_timer(info); else fbcon_add_cursor_timer(info); ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; if (mode & CM_SOFTBACK) { mode &= ~CM_SOFTBACK; y = softback_lines; } else { if (softback_lines) fbcon_set_origin(vc); y = 0; } ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1), get_color(vc, info, c, 0)); vbl_cursor_cnt = CURSOR_DRAW_DELAY; #endif }

热门文章