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--- en:c2_board_identification [2016/03/15 16:50]
joy.cho created
+++ en:c2_board_identification [2016/03/16 11:31] (current)
odroid [Ubuntu]
@@ Line 1: / Line 1: @@
 =========Board Identification =======
-under process
+To differentiate each C2 board, you can use 16-digit S/N or MAC that are written on C2 manufacturing line.
-===== Background =====
-(TODO)
 ===== Ubuntu =====
+Your kernel version should be 3.14.29-35 or higher to get the full 16 digit of unique ID.
+==== Board Identification using usid ====
+Using the following node, you can get the 16-digit board ID.
 <code>
@@ Line 14: / Line 15: @@
 </code>
-===== Android =====
+<code>
+odroid@odroid64:~$ cat /sys/class/efuse/usid
+HKC2123456789ABC
+</code>
+== Simple test example ==
 <code>
-getprop ro.serialno
+$ gcc -o get_usid get_usid.c
 </code>
 <code>
-getprop ro.boot.serialno
+odroid@odroid64:~$ ./get_usid
+S/N is 'HKC2123456789ABC'
 </code>
+<file c get_usid.c>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#define SYSFS_CLASS_USID        "/sys/class/efuse/usid"
+#define USID_LEN        16
+int main(int argc, char *argv[])
+{
+        int fd, len;
+        char buf[USID_LEN];
+        fd = open(SYSFS_CLASS_USID, O_RDONLY);
+        if (fd < 0)
+                printf("Open error! \n");
+        read(fd, buf, USID_LEN);
+        printf("S/N is '%s'\n", buf);
+        close(fd);
+        return 0;
+}
+</file>
+==== Board Identification using MAC ====
+Or the unique MAC can be used to define your board.
 <code>
-ip addr show | grep link/ether
+odroid@odroid64:~$ ip add | grep link/ether
+    link/ether 00:12:34:56:78:9A brd ff:ff:ff:ff:ff:ff
 </code>
+==== S/N and MAC information on booting console ====
+If you need to confirm if the value that you read is right one, check booting log message on console.
+<code>
+U-Boot 2015.01-00076-gbeda694 (Mar 01 2016 - 10:35:37), Build: jenkins-s905_and8
+DRAM:  2 GiB
+Relocation Offset is: 76f41000
+-------------------------------------------------------------------------------------
+* Welcome to Hardkernel's ODROID-C2
+-------------------------------------------------------------------------------------
+CPU : AMLogic S905
+S/N : HKC2123456789ABC
+MAC : 00:12:34:56:78:9A
+BID : HKC2123456
+-------------------------------------------------------------------------------------
+</code>
+===== Android =====
+==== Board Identification using usid ====
+On Android platform, you can use Property to get board ID with 'ro.serialno' or 'ro.boot.serialno'.
+<code>
+shell@odroidc2:/ $ getprop ro.serialno
+HKC2123456789ABC
+</code>
+<code>
+shell@odroidc2:/ $ getprop ro.boot.serialno
+HKC2123456789ABC
+</code>
+The native property_get method from a java app using jni can be a general and easy way.
+<file example>
+#include <cutils/perperties.h>
+void get_serialno(void) {
+    char serialno[16];
+    perperty_get("ro.serialno", serialno, "");
+    // or
+    perperty_get("ro.bootserialno", serialno, "");
+    .....
+}
+</file>