Linxu S3C2440 LCD驱动 测试程序

主机：VM - RedHat 9.0

开发板：FL2440，linux-2.6.12

arm-linux-gcc：3.4.1

1. #include <unistd.h>   
2. #include <stdio.h>   
3. #include <fcntl.h>   
4. #include <linux/fb.h>   
5. #include <sys/mman.h>   
6.   
7. #define RED_COLOR565    0x0F100   
8. #define GREEN_COLOR565  0x007E0   
9. #define BLUE_COLOR565   0x0001F   
10.   
11. int main(void)  
12. {  
13.     int fd_fb = 0;  
14.     struct fb_var_screeninfo vinfo;  
15.     struct fb_fix_screeninfo finfo;  
16.     long int screen_size = 0;  
17.     short *fbp565 = NULL;  
18.   
19.     int x = 0, y = 0;  
20.   
21.     fd_fb = open("/dev/fb0", O_RDWR);  
22.     if (!fd_fb)  
23.     {  
24.         printf("Error: cannot open framebuffer device.\n");  
25.         exit(1);  
26.     }  
27.   
28.     // Get fixed screen info   
29.     if (ioctl(fd_fb, FBIOGET_FSCREENINFO, &finfo))  
30.     {  
31.         printf("Error reading fixed information.\n");  
32.         exit(2);  
33.     }  
34.   
35.     // Get variable screen info   
36.     if (ioctl(fd_fb, FBIOGET_VSCREENINFO, &vinfo))  
37.     {  
38.         printf("Error reading variable information.\n");  
39.         exit(3);  
40.     }  
41.   
42.     // the size of the screen in bytes   
43.     screen_size = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;  
44.   
45.     printf("%dx%d, %dbpp, screen_size = %d\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel, screen_size );  
46.   
47.     // map framebuffer to user memory   
48.     fbp565 = (short *)mmap(0, screen_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd_fb, 0);  
49.   
50.     if ((int)fbp565 == -1)  
51.     {  
52.         printf("Error: failed to map framebuffer device to memory.\n");  
53.         exit(4);  
54.     }  
55.   
56.     if(vinfo.bits_per_pixel == 16)  
57.     {  
58.         printf("16 bpp framebuffer\n");  
59.   
60.         // Red Screen   
61.         printf("Red Screen\n");  
62.         for(y = 0; y < vinfo.yres/3;  y++)  
63.         {  
64.             for(x = 0; x < vinfo.xres ; x++)  
65.             {  
66.                 *(fbp565 + y * vinfo.xres + x) = RED_COLOR565;  
67.             }  
68.         }  
69.   
70.         // Green Screen   
71.         printf("Green Screen\n");  
72.         for(y = vinfo.yres/3; y < (vinfo.yres*2)/3; y++)  
73.         {  
74.             for(x = 0; x < vinfo.xres; x++)  
75.             {  
76.                 *(fbp565 + y * vinfo.xres + x) =GREEN_COLOR565;  
77.             }  
78.         }  
79.   
80.         // Blue Screen   
81.         printf("Blue Screen\n");  
82.         for(y = (vinfo.yres*2)/3; y < vinfo.yres; y++)  
83.         {  
84.             for(x = 0; x < vinfo.xres; x++)  
85.             {  
86.                 *(fbp565 + y * vinfo.xres + x) = BLUE_COLOR565;  
87.             }  
88.         }  
89.     }  
90.       
91.     else  
92.     {  
93.         printf("warnning: bpp is not 16\n");  
94.     }  
95.   
96.     munmap(fbp565, screen_size);  
97.     close(fd_fb);  
98.     return 0;  
99. }  

#include <unistd.h>#include <stdio.h>#include <fcntl.h>#include <linux/fb.h>#include <sys/mman.h>#define RED_COLOR565 0x0F100#define GREEN_COLOR565 0x007E0#define BLUE_COLOR565 0x0001Fint main(void){ int fd_fb = 0; struct fb_var_screeninfo vinfo; struct fb_fix_screeninfo finfo; long int screen_size = 0; short *fbp565 = NULL; int x = 0, y = 0; fd_fb = open("/dev/fb0", O_RDWR); if (!fd_fb) { printf("Error: cannot open framebuffer device.\n"); exit(1); } // Get fixed screen info if (ioctl(fd_fb, FBIOGET_FSCREENINFO, &finfo)) { printf("Error reading fixed information.\n"); exit(2); } // Get variable screen info if (ioctl(fd_fb, FBIOGET_VSCREENINFO, &vinfo)) { printf("Error reading variable information.\n"); exit(3); } // the size of the screen in bytes screen_size = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8; printf("%dx%d, %dbpp, screen_size = %d\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel, screen_size ); // map framebuffer to user memory fbp565 = (short *)mmap(0, screen_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd_fb, 0); if ((int)fbp565 == -1) { printf("Error: failed to map framebuffer device to memory.\n"); exit(4); } if(vinfo.bits_per_pixel == 16) { printf("16 bpp framebuffer\n"); // Red Screen printf("Red Screen\n"); for(y = 0; y < vinfo.yres/3; y++) { for(x = 0; x < vinfo.xres ; x++) { *(fbp565 + y * vinfo.xres + x) = RED_COLOR565; } } // Green Screen printf("Green Screen\n"); for(y = vinfo.yres/3; y < (vinfo.yres*2)/3; y++) { for(x = 0; x < vinfo.xres; x++) { *(fbp565 + y * vinfo.xres + x) =GREEN_COLOR565; } } // Blue Screen printf("Blue Screen\n"); for(y = (vinfo.yres*2)/3; y < vinfo.yres; y++) { for(x = 0; x < vinfo.xres; x++) { *(fbp565 + y * vinfo.xres + x) = BLUE_COLOR565; } } } else { printf("warnning: bpp is not 16\n"); } munmap(fbp565, screen_size); close(fd_fb); return 0;}

测试结果，由上往下颜色分别为红、绿、蓝，图像有色差。