给Uboot添加一个设置LCD尺寸的命令setlcd

飞凌-chaosk

Step 1： Open uboot source code file /common/command.c

Step 2:   Add the following code:

1. 
   
2. int
   
3. do_setlcd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
   
4. {   
   
5.         int i = 0;
   
6.         char *pch = NULL;
   
7.         char bootargstr[300];
   
8. 
   
9.         bool isValidArg = true;
   
10.         if((strcmp(argv[1],"35") != 0) &&
    
11.                 (strcmp(argv[1],"43") != 0) &&
    
12.                 (strcmp(argv[1],"56") != 0) &&
    
13.                 (strcmp(argv[1],"70") != 0) &&
    
14.                 (strcmp(argv[1],"VGA800") != 0) &&
    
15.                 (strcmp(argv[1],"VGA1024") != 0) )
    
16.         {
    
17.                 isValidArg = false;
    
18.         }
    
19. 
    
20.         if (!isValidArg)
    
21.         {
    
22.                 printf("*** Invalid command %s \n", argv[1]);
    
23.                 printf("Valid command must be one of the following: \n");
    
24.                 printf("setlcd 35\n");
    
25.                 printf("setlcd 43\n");
    
26.                 printf("setlcd 56\n");
    
27.                 printf("setlcd 70\n");
    
28.                 printf("setlcd VGA800\n");
    
29.                 printf("setlcd VGA1024\n");
    
30.                 return -1;
    
31.         }
    
32. 
    
33.        
    
34.         strcpy(bootargstr, getenv("bootargs"));
    
35. 
    
36.         /* remove previous setting */
    
37.         pch = strstr (bootargstr," lcdsize");
    
38.         if(pch != NULL)
    
39.         {
    
40.                 for(i = pch-bootargstr; i<300; i++)
    
41.                 {
    
42.                         bootargstr[i] = '\0';
    
43.                 }
    
44.         }
    
45. 
    
46.         strcat(bootargstr, " lcdsize=");
    
47.         strcat(bootargstr, argv[1]);
    
48. 
    
49.         setenv("bootargs", bootargstr);
    
50.         printf("set string:%s\n", bootargstr);
    
51.         saveenv();
    
52. 
    
53.         return 0;
    
54. }
    
55. 
    
56. U_BOOT_CMD(
    
57.         setlcd,        2,                1,        do_setlcd,
    
58.         "setlcd  - set lcd size\n",
    
59.         "command: \n"
    
60.         "setlcd 35          -- set LCD as 3.5 inches screen 320x240\n"
    
61.         "setlcd 43          -- set LCD as 4.3 inches screen 480x272\n"
    
62.         "setlcd 56          -- set LCD 5.6 inches screen 640x480\n"
    
63.         "setlcd 70          -- set LCD 7.0 inches screen 800x480\n"
    
64.         "setlcd VGA800      -- set LCD 8.0 inches screen 800x600\n"
    
65.         "setlcd VGA1024     -- set LCD screen with size 1024x768\n"       
    
66. );
    

复制代码

Step 3: Compile Uboot sourcecode to create uboot.bin

Step 4: Reburn your system with the new uboot.bin

Step 5: Restart the board, and press SPACE to enter uboot menu.

Step 6: Then you can set the lcd size with only one single command: setlcd XX

SMDK6410 # help setlcd
setlcd command:
setlcd 35          -- set LCD as 3.5 inches screen 320x240
setlcd 43          -- set LCD as 4.3 inches screen 480x272
setlcd 56          -- set LCD 5.6 inches screen 640x480
setlcd 70          -- set LCD 7.0 inches screen 800x480
setlcd VGA800      -- set LCD 8.0 inches screen 800x600
setlcd VGA1024     -- set LCD screen with size 1024x768

SMDK6410 # setlcd VGA800
set string:root=/dev/mtdblock2 rootfstype=yaffs2 init=/linuxrc nconsole=tty1 console=ttySAC0,115200 lcdsize=VGA800
Erasing Nand...Writing to Nand... done
:handshake

飞凌-chaosk

Thank mycent for pointing out the bug! I just have it updated.