Linux/TDA2: How to get the serial number of the chip of tda2x

shuai wang32

Genius 4770 points

Part Number: TDA2

Tool/software: Linux

How to get the serial number of the chip of tda2x

over 5 years ago

0 Mariya Petkova over 5 years ago

TI__Expert 4885 points

Hi, shuai wang32,

Please refer to 1.5 TDA2x Device Identification section in Technical Reference Manual.

Regards,
Mariya

0 Stanislav Stilyanov over 5 years ago

TI__Genius 15120 points

Hi,

Please refer to Table 1-2. DIE_ID in the device TRM.

Although not explicitly stated, I think DIE_ID is a unique die ID identificator.

Regards,

Stan

0 shuai wang32 over 5 years ago in reply to Stanislav Stilyanov

Genius 4770 points

Hi Stan
I'm going to use the only chip ID to encrypt it.
Table 1-2. DIE_ID Is it appropriate？
shuai

0 Rishabh Garg over 5 years ago in reply to shuai wang32

TI__Guru 55685 points

Hi Shuai,

Yes this is correct.

Regards,
Rishabh

0 shuai wang32 over 5 years ago in reply to Rishabh Garg

Genius 4770 points

HI Rishabh:
HOW CAN I get the DIE_ID number on A15 in linux!

unsigned int chipid[4];
chipid[0]=STD_FUSE_DIE_ID_0;
chipid[1]=STD_FUSE_DIE_ID_1;
chipid[2]=STD_FUSE_DIE_ID_2;
chipid[3]=STD_FUSE_DIE_ID_3;
printf("chipid[0]=%d ,chipid[1]=%d,chipid[2]=%d,chipid[3]=%d\n",chipid[0],chipid[1],chipid[2],chipid[3]);
chains_main.c:142:12: error: 'STD_FUSE_DIE_ID_1' undeclared (first use in this function)

0 Rishabh Garg over 5 years ago in reply to shuai wang32

TI__Guru 55685 points

Hi Shuai,

These are registers in the Control Module.
Search for CTRL_WKUP_STD_FUSE_DIE_ID_0(0x4AE0 C200) in Control Module chapter in TRM.

Regards,
Rishabh

0 Srirama Govindarajan over 5 years ago in reply to shuai wang32

TI__Expert 8230 points

Hi
You will not be able to just access the device physical registers on Linux
Linux uses a full fledged MMU to ensure isolation between Kernel and user mode access
Accessing device register from an User application is typically not allowed unless you are writing a user space driver for a peripheral

If it is for some debug you can use tools such as omapconf(github.com/.../wiki) to temporarily map the device registers and read/write to it

0 shuai wang32 over 5 years ago in reply to Srirama Govindarajan

Genius 4770 points

I have a A15 algorithm link needs to be encrypted and used for users, I want to use chip ID to correspond to encrypted files, so how do I get the chip ID in the A15's algorithm LINK? In this way, I can verify whether the chip ID matches the encrypted file.

0 Srirama Govindarajan over 5 years ago in reply to shuai wang32

TI__Expert 8230 points

Are you suggesting that you would like to use the chip ID as an input for the encryption process - is the encryption based on the chip id itself or a device unique key

0 shuai wang32 over 5 years ago in reply to Srirama Govindarajan

Genius 4770 points

Hi Sriram
based on the chip id itself ！
BESTwishes
shuai

0 shuai wang32 over 5 years ago in reply to shuai wang32

Genius 4770 points

Using a emulator can look at the register of ID ， also read Physical Address, but canot read Physical Address in code of linux.

0 shuai wang32 over 5 years ago in reply to shuai wang32

Genius 4770 points

****** Segmentation fault caught ....
Faulty address is 0x4ae0c200, called from 0xb6c4d1a9
Totally Obtained 0 stack frames. signal number =11
Signal number = 11, Signal errno = 0
SI code = 1 (Address not mapped to object)
Fault addr = 0x4ae0c200
[bt] Execution path:

0 Srirama Govindarajan over 5 years ago in reply to shuai wang32

TI__Expert 8230 points

Hi
Can you clarify where will you need to read the chip id from
If it is from user space, you have to resort to one of the following
1. Read from RTOS(on M4) , pass this information as part of IPC to application on A15
2. On A15 Use tool like omapconf and some scripting to pass this information to your application
3. Emulate ompaconf type mapping from a custom driver to map and read the device id information

0 shuai wang32 over 5 years ago in reply to Srirama Govindarajan

Genius 4770 points

Hi：Sriram
i want to read chip id on A15 algorithm link !

0 shuai wang32 over 5 years ago in reply to shuai wang32

Genius 4770 points

Hi：Sriram
On A15 Use tool like omapconf
is there any sample or document for guide !
shuai

0 Srirama Govindarajan over 5 years ago in reply to shuai wang32

TI__Expert 8230 points

Hi
For omapconf usage refer wiki link : github.com/.../wiki

0 Yordan Kamenov over 5 years ago in reply to Srirama Govindarajan

TI__Mastermind 42515 points

Hi Shuai,

We haven't heard back from you, I'm assuming you were able to resolve your issue.
If not, just post a reply below (or create a new thread if the thread has locked due to time-out).

Regards,
Yordan

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Linux/TDA2: How to get the serial number of the chip of tda2x