OMAP4430/4460 internal ID number

michelle villegas

Other Parts Discussed in Thread: 4460

Hi, is just that i am working with a device based on OMAP4430/4460, and i am running Android ICS on it, and when i run the O.S. on it, it has an ID number named androidboot.serialno, it is a serial number and it also appears when i flash the SD card for the board (pandaboard), and that id always changes for different boards, but each board has its own number, so i would like to know where does that serial number come from, does it come from the OMAP4430/4460? because as far as i know, the board doesn't bring any memory, so, i need to know where does it come from for me to use that number.

Best Regards.

over 12 years ago

0 Manuel Contreras over 12 years ago

TI__Genius 10545 points

By tracing it back,

it is a system's property ro.serialno.

/4ai17/mydroid/system/core/init/init.c

static void import_kernel_nv(char *name, int in_qemu)
{
    char *value = strchr(name, '=');

    if (value == 0) return;
    *value++ = 0;
    if (*name == 0) return;

    if (!in_qemu)
    {
        /* on a real device, white-list the kernel options */
        if (!strcmp(name,"qemu")) {
            strlcpy(qemu, value, sizeof(qemu));
        } else if (!strcmp(name,"androidboot.console")) {
            strlcpy(console, value, sizeof(console));
        } else if (!strcmp(name,"androidboot.mode")) {
            strlcpy(bootmode, value, sizeof(bootmode));
        } else if (!strcmp(name,"androidboot.serialno")) {
            strlcpy(serialno, value, sizeof(serialno));

then

static int set_init_properties_action(int nargs, char **args)
{
    char tmp[PROP_VALUE_MAX];

    if (qemu[0])
        import_kernel_cmdline(1, import_kernel_nv);

    if (!strcmp(bootmode,"factory"))
        property_set("ro.factorytest", "1");
    else if (!strcmp(bootmode,"factory2"))
        property_set("ro.factorytest", "2");
    else
        property_set("ro.factorytest", "0");

    property_set("ro.serialno", serialno[0] ? serialno : "");

Check full file to get the code and values vor val[1] and val[0], property's value can be read from bootargs in dmesg or after kernel boots,

/4ai17/u-boot/common/cmd_bootm.c

serial_len = sprintf(serial_str, " androidboot.serialno=%08X%08X", val[1], val[0]);

0 michelle villegas over 12 years ago in reply to Manuel Contreras

Intellectual 640 points

Hi, thanks for the reply, is just that my question is if that number comes from OMAP4430/4460 internal ROM?, that number is not an O.S. configuration but a saved value in the processors memory?

Best Regards.

0 Manuel Contreras over 12 years ago in reply to michelle villegas

TI__Genius 10545 points

By checking OMAP4430 TRM section "1.5 OMAP4430 Family and Device Identification", it is a value stored inside the processor.

Processors

Processors forum

OMAP4430/4460 internal ID number