How to change BD address dynamically?

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summer20100514
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How to change BD address dynamically?

I can change BD address during startup, for example, I add some code in custom_nvds_get_func() to load BD address from an external FLASH. But I can't change it later. Is there any way to change BD addresswhenever neededafter startup?

JE_Dialog
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Hi There, please see

Hi There, please see following post which i beleive covers your quetsion.

http://support.dialog-semiconductor.com/bd-address-external-memory

BR JE_Dialog

summer20100514
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I am afraid you misunderstand

I am afraid you misunderstand my question. I read the post already, I want to change the BD address dynamically, but the solution in the post can only change the BD address once.

summer20100514
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I am blocking by this issue

I am blocking by this issue all day long, can you help me?

summer20100514
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Any suggestions?

Any suggestions?

VesaN
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Hello summer20100514,

Hello summer20100514,

Maybe this document is helpful?

To use the described method you need to obtain IRK via bonding.

Can you describe more your issue?

summer20100514
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Thank, but I have already add

Thank, but I have already add the code to achieve the functionalities as discussed in the document you point out, which is a resolvable private address solution. It works well. But my question is, can I configure the BD address whenever I want, such as using an app to configure it. Or I have no need to do so, because the BD address is already changing from time to time??? Maybe I don't make the thing clearly.

VesaN
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Hello summer20100514,

Hello summer20100514,

In core definition 4.1 vol 3 p. 384 it says:

A device may choose to initialize its static address to a new value after each power cycle. A device shall not change its static address value once initialized until the device is power cycled.

I doubt you need to change the address yourself

PY_Dialog
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Hi summer20100514,

Hi summer20100514,

You can change BD address, but to make it take effect, you have to reset radio. Please use GAPM_RESET message to reset your radio every time you change your bd address.

Regards!
PY

summer20100514
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I tested GAPM_RESET command,

I tested GAPM_RESET command, and the BD address changed, but there is still something confuses me. I add the following code in custom_nvds_get_func()

for(uint8_t i = 0; i < 6; i++)
{
buf[i] = reload_bd_addr[i];
}
reload_bd_addr[0] += 1;

and in the function gattc_write_cmd_ind_handler() of my service

// reset the lower layers.
结构的差距m_reset_cmd* cmd = KE_MSG_ALLOC(GAPM_RESET_CMD, TASK_GAPM, TASK_APP,
gapm_reset_cmd);
cmd->operation = GAPM_RESET;
ke_msg_send(cmd);

the result

  1. after initialization, the BD address is 00 00 00 00 00 01
  2. after I write something to my service, the the BD address is 00 00 00 00 00 03, but I can't find my service anymore, onlyGeneric AccessandGeneric Attributeleft

My question

  1. why is the BD addressget increased by 2 instead of 1?
  2. why do I can't find my serviceafter sending an GAPM_RESET command?
PY_Dialog
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Hi summer20100514,

Hi summer20100514,

1. check whether you run this code twice.
2. you also need to reinit your profile service to after reset.

Regards!
PY

summer20100514
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I guess the function custom

I guess the function custom_nvds_get_func() is called by stack, so I can't figure out whether it is called twice.

summer20100514
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Would the support team be

Would the support team be kind to answer this?

PY_Dialog
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Hi Summer,

Hi Summer,

You can turn off sleep mode in da14580_config.h by comment out CFG_EXT_SLEEP and CFG_DEEP_SLEEP. Then use debug and break point to track your program.

Regards!
PY