RTOS/LAUNCHXL-CC1312R1: How to read the MAC ID of the module? How we can write the MAC ID to non volatile memory?

kavya dn

Prodigy 210 points

Part Number: LAUNCHXL-CC1312R1
Other Parts Discussed in Thread: UNIFLASH

Tool/software: TI-RTOS

Hello TI,

could you please help me to read the MAC ID of the cc1312 module.

How we can write same MAC ID into non voltaile memory?

Regards,

kavya

over 7 years ago

0 YiKai Chen over 7 years ago

Guru 735695 points

You can read the MAC IEEE 802.15.4 address using the following code:

uint64_t macAddrLsb = HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_0);

uint64_t macAddrMsb =HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_1);

uint64_t macAddress = (uint64_t)(macAddrMsb << 32) + macAddrLsb;

0 Clément over 7 years ago

TI__Guru** 101540 points

Hi,

To complete the previous answer, you can also read the MAC address of your device using Uniflash. Once you have connected your device, go to the “Settings & Utilities” tab, scroll down and read the address (you can as well read/write the secondary address).

Regards,

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

Hello TI,

Thanks for the input.

I am getting this as int value.(macAddress)

example :480926427.

could you please tell me how to read exact MAC ID.

Regards,

kavya

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

Can you elaborate how you get this "example :480926427."?

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

Hello TI,

Thanks for the reply.

I am using format specifier to print the mac address.

example:Display_printf(display, 0, 0,"Mac ID =%d", macAddress); (tried %04d,%08d ,%16d getting same value)

I have tried %x also... i am getting he result as 1caa5adb.

Regards,

kavya

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

If you use Flash Programmer to read the MAC ID of your LaunchPad, what do you read?

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

Hello TI,

Flash Programmer read the MAC id as 00:12:4B:00:1C:AA:5A:DB.

I want software code to get the MAC id.

Please help me to read this MAC id through software code.

Regards,

kavya

0 TER over 7 years ago in reply to kavya dn

TI__Guru**** 317180 points

Have you tested the code YK posted in the first reply to this post?

0 Clément over 7 years ago in reply to kavya dn

TI__Guru** 101540 points

Hi Kavya,

FYI: 480926427 = 0x1CAA5ADB (which corresponds to the 4 last bytes of your MAC address).

Now, you basically need to get the 4 missing bytes of the address (maybe you need to store the two parts of the address in two uint32 instead of one uint64) and print the number in hexadecimal format (using %x or %X format in Display_printf()). To obtain the format XX: XX: XX: XX: XX: XX: XX: XX, you will need to print the data byte per byte using a mask.

Regards,

0 kavya dn over 7 years ago in reply to TER

Prodigy 210 points

Hello,

Yes I have tried...

I am getting this as int value.(macAddress)

example :480926427.

Regards,

kavya

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

I suppose you have to do byte mask and shift on macAddress to display the correct value via Display_printf.

0 kavya dn over 7 years ago in reply to kavya dn

Prodigy 210 points

Hello TI,

uint64_t macAddrLsb = HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_0);

uint64_t macAddrMsb =HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_1);

uint64_t macAddress = (uint64_t)(macAddrMsb << 32) + macAddrLsb;

The above code only prints the 4 bytes of the macAddrLsb. I wanted to print full mAC ID .(ex:1caa5adb.)

I have tried so many ways..but its not printing.could you please help me to solve this issue.

Regards,

kavya

0 Clément over 7 years ago in reply to kavya dn

TI__Guru** 101540 points

Hi,

The solution is exactly as I suggested before:

    uint32_t macAddrLsb = HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_0);
    uint32_t macAddrMsb =HWREG(FCFG1_BASE + FCFG1_O_MAC_15_4_1);

    Display_printf(hSerial, 1, 0, "%x", macAddrMsb);
    Display_printf(hSerial, 2, 0, "%x", macAddrLsb);

This will print (for me):

1ca610ef
124b5218

Regards,

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

kavya dn Your problem is on Display_printf. The "%x" in Display_printf only take 4bytes to display so you cannot use uint64_t on it. Otherwise, it will be truncate to 4 bytes and that's why you only see lower 4 bytes. Please refer to Clément's code to display high/low 4 bytes of MAC address separately.

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

Hello TI,

Thanks for the input.

Its working fine now.

As I already mentioned..... how we can write this MAC ID to non volatile memory?

Regards,

kavya

0 Clément over 7 years ago in reply to kavya dn

TI__Guru** 101540 points

Hi again,

Good to see that you solved your problem.

To write in non volatile memory, please read the following threads:https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/635326 and https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz/f/156/t/806464

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

You cannot overwrite primary MAC address. The alternative is to use secondary MAC address which is located at 0x00057FC8.

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

Hello TI,

Thanks for the input.

ok...could you please share the code how to write MAC ID into non volatile memory.?(secondary MAC Address)

Regards,

kavya

0 Clément over 7 years ago in reply to kavya dn

TI__Guru** 101540 points

Hi,

You have two ways to modify the secondary MAC address of your device:

1- Using Uniflash (still in the tab "Settings & Utilities")

2- Modifying the value in the ccfg.c file. You can basically modify the following lines:

//#####################################
// Alternative IEEE 802.15.4 MAC address
//#####################################
#ifndef SET_CCFG_IEEE_MAC_0
#define SET_CCFG_IEEE_MAC_0                             0xFFFFFFFF // Bits [31:0]
#endif

#ifndef SET_CCFG_IEEE_MAC_1
#define SET_CCFG_IEEE_MAC_1                             0xFFFFFFFF // Bits [63:32]
#endif

After this, you can use the following code to read the secondary MAC address:

    uint32_t macAddrLsb_ = HWREG(CCFG_BASE + CCFG_O_IEEE_MAC_0);
    uint32_t macAddrMsb_ = HWREG(CCFG_BASE + CCFG_O_IEEE_MAC_1);

    Display_printf(hSerial, 1, 0, "%x", macAddrMsb_);
    Display_printf(hSerial, 2, 0, "%x", macAddrLsb_);

Best regards,

0 YiKai Chen over 7 years ago in reply to kavya dn

Guru 735695 points

You can write secondary MAC address using Flash Programmer 2.

0 kavya dn over 7 years ago in reply to YiKai Chen

Prodigy 210 points

hello TI,

I was not able to write secondary MAC address through uniflash tool.It is showing the below error.

Error!
Error: Expected MAC address length of 8 bytes.

successfully able to add code in ccfg.c file. I can able to read secondary mac address.

could you please provide the code how we can write into secondary MAC address.

Regards,

kavya

0 Clément over 7 years ago in reply to kavya dn

TI__Guru** 101540 points

Hi,

I don't understand what you are asking for: the code to modify secondary MAC address was already provided to you in this thread (it consisted in modify the content of ccfg.c file).

By the way don't forget to click "This Resolved my issue" when an answer helps you, this will keep people keen to help you.

Best regards,

0 kavya dn over 7 years ago in reply to Clément

Prodigy 210 points

Hello TI,

OK..Thanks for the input.

I wanted to write MAC ID of cc1312 module to non volatile memory? how we can write?

Example:our MAC ID is 00:12:4B:00:1C:AA:61:29

Thanks and Regards,

kavya

Sub-1 GHz

Sub-1 GHz forum

RTOS/LAUNCHXL-CC1312R1: How to read the MAC ID of the module? How we can write the MAC ID to non volatile memory?