通过全志R16平台TINAV2.1下的LCD显示BMP图片（分色排版）V1.0版本

通过全志R16平台TINAV2.1下的LCD显示BMP图片

 

2017/7/3 14:25

 

 

请严重注意前两点：

1、红绿蓝的顺序，BMP格式的图片和LCD显示屏是一样的。

2、BMP的图片显示顺序：从左下（坐标原点）开始，最后到右上。LCD的坐标原点是左上。如果不注意，会出现图片显示的效果是上下对称反的情况！

3、为了简单起见，将禁止休眠的指令：echo on > /sys/power/state在程序里面通过system这个系统调用来实现了！

4、直接将/bin/1.bmp这幅图片在LCD上面显示了。使用的是fread函数，没有使用memcpy等系统的库函数，可以优化！

 

 

1、原始编译：

rootroot@cm-System-Product-Name:/home/wwt$ cd display_tinav2.1/

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ source build/envsetup.sh 

including target/allwinner/tulip-d1/vendorsetup.sh

including target/allwinner/octopus-sch/vendorsetup.sh

including target/allwinner/azalea-perf2/vendorsetup.sh

including target/allwinner/azalea-perf3/vendorsetup.sh

including target/allwinner/octopus-dev/vendorsetup.sh

including target/allwinner/astar-evb/vendorsetup.sh

including target/allwinner/generic/vendorsetup.sh

including target/allwinner/azalea-perf1/vendorsetup.sh

including target/allwinner/astar-parrot/vendorsetup.sh

including target/allwinner/astar-spk/vendorsetup.sh

including target/allwinner/azalea-evb/vendorsetup.sh

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ lunch

     14. astar_parrot-tina

Which would you like?14

 

============================================

PLATFORM_VERSION_CODENAME=Neptune

PLATFORM_VERSION=2.0.0

TARGET_PRODUCT=astar_parrot

TARGET_BUILD_VARIANT=tina

TARGET_BUILD_TYPE=release

TARGET_BUILD_APPS=

TARGET_ARCH=arm

TARGET_ARCH_VARIANT=armv7-a-neon

TARGET_CPU_VARIANT=cortex-a7

TARGET_2ND_ARCH=

TARGET_2ND_ARCH_VARIANT=

TARGET_2ND_CPU_VARIANT=

HOST_ARCH=x86_64

HOST_OS=linux

HOST_OS_EXTRA=Linux-3.13.0-24-generic-x86_64-with-Ubuntu-14.04-trusty

HOST_BUILD_TYPE=release

BUILD_ID=57513AA3

OUT_DIR=

============================================

 

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ make -j12

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ pack -d

 

 

 

 

2、编译uboot，重新烧录启动之后就可以看见图标！（已经打uboot显示图标的patch！）

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ cd lichee/brandy/

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/brandy$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/brandy$ ./build.sh -p sun8iw5p1

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/brandy$ cd -

/home/wwt/display_tinav2.1

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ pack -d

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

 

 

 

 

3、增加fb_test显示BMP图片的这个应用程序：

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ cd package/allwinner/

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$ unzip FB测试程序.zip 

Archive:  FB测试程序.zip

  inflating: diff.patch              

  inflating: src.zip                 

  inflating: ╦╡├ў.txt         

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$ unzip src.zip 

Archive:  src.zip

  inflating: allwinner/fb_test/Makefile  

  inflating: allwinner/fb_test/src/Makefile  

  inflating: allwinner/fb_test/src/main.c  

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$ cd allwinner/

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner/allwinner$mv fb_test/ ..

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner/allwinner$cd ..

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$ rm allwinner/ -rf

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/package/allwinner$ cd ../..

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ cp .config bak1_orig.config

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ source build/envsetup.sh 

including target/allwinner/tulip-d1/vendorsetup.sh

including target/allwinner/octopus-sch/vendorsetup.sh

including target/allwinner/azalea-perf2/vendorsetup.sh

including target/allwinner/azalea-perf3/vendorsetup.sh

including target/allwinner/octopus-dev/vendorsetup.sh

including target/allwinner/astar-evb/vendorsetup.sh

including target/allwinner/generic/vendorsetup.sh

including target/allwinner/azalea-perf1/vendorsetup.sh

including target/allwinner/astar-parrot/vendorsetup.sh

including target/allwinner/astar-spk/vendorsetup.sh

including target/allwinner/azalea-evb/vendorsetup.sh

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ lunch

     14. astar_parrot-tina

Which would you like?14

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ make menuconfig

Allwinner  --->

< > fb_test.......................................... is framebuffer bin file (NEW)

修改为：

<*> fb_test.......................................... is framebuffer bin file

 

Kernel modules  --->

Video Support  --->

< > kmod-sunxi-disp....................................... SUNXI-DISP support

< > kmod-sunxi-lcd......................................... SUNXI-LCD support

修改为：

-*- kmod-sunxi-disp....................................... SUNXI-DISP support

<*> kmod-sunxi-lcd......................................... SUNXI-LCD support

 

 

（已经打开：）

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ cp .config bak2_disp.config

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ cd lichee/linux-3.4/

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/linux-3.4$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/linux-3.4$ cp .config bak1_orig.config

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1/lichee/linux-3.4$ cd -

/home/wwt/display_tinav2.1

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ make kernel_menuconfig

Device Drivers  --->

Graphics support  --->

<*> Support for frame buffer devices  --->

Video support for sunxi  --->

<M> DISP Driver Support(sunxi)

[ ] Framebuffer Console Support(sunxi)

<M> LCD Driver Support(sunxi)

 

 

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ make -j12

rootroot@cm-System-Product-Name:/home/wwt/display_tinav2.1$ pack -d

 

 

 

 

4、重新烧录之后，通过adb push将1.bmp传送到/bin/目录下（不需要修改属性）。

请注意：1.bmp是1280x800分辨率。

图片来源：

百度搜索关键词：1280x800，即可获得大量的1280x800分辨率的JPG格式的图片，可以通过windows自带的画图/mspaint或者ACD SEE等等转换为bmp格式的图片。

 

或者使用Photoshop/GIMP等等图片编辑软件来裁剪现有的图片。

 

 

Microsoft Windows [版本 6.1.7600]

版权所有 (c) 2009 Microsoft Corporation。保留所有权利。

 

C:\Users\Administrator>cd D:\360极速浏览器下载\1280x800

 

C:\Users\Administrator>d:

 

D:\360极速浏览器下载\1280x800>adb push 1.bmp /bin/

8403 KB/s (3072054 bytes in 0.357s)

 

D:\360极速浏览器下载\1280x800>

 

 

在串口执行fb_test，即可看见全红/全绿/全蓝/您发送到系统里面的图片交替出现：

root@TinaLinux:/# fb_test

[ 7783.934037] request_suspend_state: wakeup (0->0) at 7783934016547 (1970-01-05 12:17:49.569918251 UTC)

fb0  begining

readCnt = 1

****wyb 2017/7/3 9:36 x = 1280  y = 800 bytes_per_pixel = 4

screensize = 4096000

----- RED 0

----- GREEN

----- BLUE

----- RED 1

----- GREEN

----- BLUE

^C

root@TinaLinux:/#

 

 

 

 

5、常见错误：

root@TinaLinux:/#

root@TinaLinux:/# pwd

/

root@TinaLinux:/#

root@TinaLinux:/# fb_test

[ 7945.097615] request_suspend_state: wakeup (0->0) at 7945097595373 (1970-01-05 12:20:30.733496827 UTC)

fb0  begining

Segmentation fault

root@TinaLinux:/#

（您忘记经将1.bmp通过adb push到/bin/下了。通过adb push进去之后，再次执行fb_test即可！）

 

 

 

 

参考资料：

http://baike.baidu.com/link?url=afkmkmYkclixDWOVDE5ci3P6UpMXC-bdZyiE3t8WFxLTLjNkk2kKF54e1dsvNXbGIcGIBo6pQdEgdt1uBSYgd_

BMP （图像文件格式(Bitmap)）

//----图像处理-----BMP为DIB类型，从底向上显示---------

//阵列中的第一个字节表示位图左下角的象素，而最后一个字节表示位图右上角的象素。

 

 

http://blog.csdn.net/yang2011079080010/article/details/52528261

fopen()、fwrite()、fread()函数使用说明与示例

 

 

源码：

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <linux/fb.h>
#include <sys/mman.h>


int Show(char *framebuffer_devices)
{
int fp = 0;
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
int screensize = 0;
char *fbp = 0;
int x = 0, y = 0;
int location = 0;
int bytes_per_pixel;// 组成每一个像素点的字节数

int count = 0;




FILE *file_fd = NULL;
file_fd = fopen("/bin/1.bmp", "r");
char buffer[3072054];  // 1280*800*3+54=
int readCnt = fread(buffer, sizeof(buffer), 1, file_fd);  //返回值为0
printf("readCnt = %d\n", readCnt);
fclose(file_fd);




fp = open(framebuffer_devices, O_RDWR);
if(fp < 0)
{
printf("error: Can not open %s device!!!!!!!!!!!!!!!!!!!!!!!!!!\n", framebuffer_devices);

return -1;
}

if(ioctl(fp, FBIOGET_FSCREENINFO, &finfo))
{
printf("err FBIOGET_FSCREENINFO!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
close(fp);

return -2;
}

if(ioctl(fp, FBIOGET_VSCREENINFO, &vinfo))
{
printf("err FBIOGET_VSCREENINFO!!!!!!!!!!!!!!!!!!!!!!!!!!\n");
close(fp);

return -3;
}

bytes_per_pixel = vinfo.bits_per_pixel / 8;

screensize = vinfo.xres * vinfo.yres * bytes_per_pixel;

printf("****wyb 2017/7/3 9:36 x = %d  y = %d bytes_per_pixel = %d\n", vinfo.xres, vinfo.yres, bytes_per_pixel);
printf("screensize = %d\n", screensize);

fbp = (char *)mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, fp, 0);
if((int) fbp == -1)
{
printf("err mmap!!!!!!!!!!!!!!!!!!!!!!!!!!");
close(fp);

return -4;
}

//for(count = 0; count <100; count ++)
for(count = 0; count >= 0; count ++)
{
printf("----- RED %d\n", count);
for(x = 0; x < vinfo.xres; x ++)
{
for(y = 0; y < vinfo.yres; y++)
{
location = x * bytes_per_pixel + y * finfo.line_length;
*(fbp + location + 0) = 0x00;// 蓝色的色深
*(fbp + location + 1) = 0x00;// 绿色的色深
*(fbp + location + 2) = 0xFF;// 红色的色深
//*(fbp + location + 3) = 0;// 是否透明
}
}
//usleep(500 * 1000);

sleep(1);
puts("----- GREEN");
for(x = 0; x < vinfo.xres; x ++)
{
for(y = 0; y < vinfo.yres; y++)
{
location = x * bytes_per_pixel + y * finfo.line_length;
*(fbp + location + 0) = 0x00;// 蓝色的色深
*(fbp + location + 1) = 0xFF;// 绿色的色深
*(fbp + location + 2) = 0x00;// 红色的色深
//*(fbp + location + 3) = 0;// 是否透明
}
}

//usleep(500 * 1000);
sleep(1);
puts("----- BLUE");
for(x = 0; x < vinfo.xres; x ++)
{
for(y = 0; y < vinfo.yres; y++)
{
location = x * bytes_per_pixel + y * finfo.line_length;
*(fbp + location + 0) = 0xFF;// 蓝色的色深
*(fbp + location + 1) = 0x00;// 绿色的色深
*(fbp + location + 2) = 0x00;// 红色的色深
//*(fbp + location + 3) = 0;// 是否透明
}
}

sleep(1);
for(x = 0; x < vinfo.xres; x ++)
{
for(y = 0; y < vinfo.yres; y++)
{
location = x * bytes_per_pixel + y * finfo.line_length;

// 2017/7/3 11:25 矫正BMP显示和LCD显示的上下反 799-y 
*(fbp + location + 0) = buffer[54+(1280*(799-y)+x)*3+0];// 蓝色的色深
*(fbp + location + 1) = buffer[54+(1280*(799-y)+x)*3+1];// 绿色的色深
*(fbp + location + 2) = buffer[54+(1280*(799-y)+x)*3+2];// 红色的色深
//*(fbp + location + 3) = 0;// 是否透明
}
}

sleep(5);
}

munmap(fbp, screensize);
close(fp);

return 0;
}


int main(void)
{
char fb_path[30] = {0};
int i = 0;


system("echo on > /sys/power/state");


printf("fb0  begining \n");
Show("/dev/fb0");


#if 0
for(i = 0; i < 100; i ++)
{
memset(fb_path, 0, sizeof(fb_path));
sprintf(fb_path, "/dev/fb%d", i);
printf("show %s...\n", fb_path);
if(-1 == Show(fb_path))
break;
printf("%s ok\n\n", fb_path);
}
#endif

return 0;
}