给Uboot添加一个设置LCD尺寸的命令setlcd
本帖最后由 飞凌-chaosk 于 2011-9-22 11:17 编辑Step 1： Open uboot source code file /common/command.c
Step 2: Add the following code:
int
do_setlcd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int i = 0;
char *pch = NULL;
char bootargstr;
bool isValidArg = true;
if((strcmp(argv,"35") != 0) &&
(strcmp(argv,"43") != 0) &&
(strcmp(argv,"56") != 0) &&
(strcmp(argv,"70") != 0) &&
(strcmp(argv,"VGA800") != 0) &&
(strcmp(argv,"VGA1024") != 0) )
{
isValidArg = false;
}
if (!isValidArg)
{
printf("*** Invalid command %s \n", argv);
printf("Valid command must be one of the following: \n");
printf("setlcd 35\n");
printf("setlcd 43\n");
printf("setlcd 56\n");
printf("setlcd 70\n");
printf("setlcd VGA800\n");
printf("setlcd VGA1024\n");
return -1;
}
strcpy(bootargstr, getenv("bootargs"));
/* remove previous setting */
pch = strstr (bootargstr," lcdsize");
if(pch != NULL)
{
for(i = pch-bootargstr; i<300; i++)
{
bootargstr = '\0';
}
}
strcat(bootargstr, " lcdsize=");
strcat(bootargstr, argv);
setenv("bootargs", bootargstr);
printf("set string:%s\n", bootargstr);
saveenv();
return 0;
}
U_BOOT_CMD(
setlcd, 2, 1, do_setlcd,
"setlcd- set lcd size\n",
"command: \n"
"setlcd 35 -- set LCD as 3.5 inches screen 320x240\n"
"setlcd 43 -- set LCD as 4.3 inches screen 480x272\n"
"setlcd 56 -- set LCD 5.6 inches screen 640x480\n"
"setlcd 70 -- set LCD 7.0 inches screen 800x480\n"
"setlcd VGA800 -- set LCD 8.0 inches screen 800x600\n"
"setlcd VGA1024 -- set LCD screen with size 1024x768\n"
);
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 Thank mycent for pointing out the bug! I just have it updated.
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