direction finding rx example problem

Hello Hang,

I have a tried recreating your exact issue, but I haven't been able to. However, I do also run into issues using your configurations.

It seems like you are trying to disable both AoA and AoD? Are you able to run the standard examples, with default configurations?

Regards,

Elfving

Hello Hang,

I have a tried recreating your exact issue, but I haven't been able to. However, I do also run into issues using your configurations.

It seems like you are trying to disable both AoA and AoD? Are you able to run the standard examples, with default configurations?

Regards,

Elfving

thank you Elfving

I just want to disable AOA, but if i don't disable `CONFIG_BT_CTLR_DF_ANT_SWITCH_RX`, the project will build failed, just like this

C:\Users\Thomas\ncs\v1.9.1\zephyr\subsys\bluetooth\controller\ll_sw\nordic\hal\nrf5\radio\radio_df.c:81:1: error: static assertion failed: "Missing antenna pattern used to select antenna for PDU Tx during the DFE Idle state. Set the dfe-pdu-antenna devicetree property."
   81 | BUILD_ASSERT(HAS_PDU_ANTENNA,
      | ^~~~~~~~~~~~
C:\Users\Thomas\ncs\v1.9.1\zephyr\subsys\bluetooth\controller\ll_sw\nordic\hal\nrf5\radio\radio_df.c:116:1: error: static assertion failed: "You must set the dfe-antenna-num property in the radio node to enable antenna switching."
  116 | BUILD_ASSERT(HAS_ANTENNA_NUM,

I see.

hang chen said:

ut if i don't disable `CONFIG_BT_CTLR_DF_ANT_SWITCH_RX`, the project will build failed, just like this

That configuration is in the right place, and I believe that is the only configuration you would need, though I am not so sure about the other ones. Are you getting errors when you only use this configuration to disable AOA? 

Are you seeing this problem in the basic examples as well? Is your project modified a lot compared to the default project?

Regards,

Elfving

I just copied the `nrf52833dk_nrf52833.conf` and `overlay-aod.conf` to my prj.conf.

If I remove the `CONFIG_BT_CTLR_DF_ANT_SWITCH_RX`, and configure a fake antenna switch, like this

const static uint8_t ant_patterns[] = { 0x00, 0x00};

my projectt will run correctly

hang chen said:

If I remove the `CONFIG_BT_CTLR_DF_ANT_SWITCH_RX`, and configure a fake antenna switch, like this

hang chen said:

my projectt will run correctly

Okay, and by that you mean that it both builds correctly and does not throw an error during the receiving of a CTE? 

hang chen said:

I just want to disable AOA, but if i don't disable `CONFIG_BT_CTLR_DF_ANT_SWITCH_RX`, the project will build failed, just like this

So in other words the build fails when you have only have set CONFIG_BT_DF_CTE_RX_AOA=n in addition to the default? Does it work for you with only the default enabled though? It is good to make sure that there are nothing wrong with your copy of the standard samples before continuing. 

Regards,

Elfving

thank you Elfving, Sorry for taking so long to reply to you.

yes, Maybe I found the problem. I found that even in AOD, the instructions sent are still AOA. On line 326 of the direction.c, I found that the number of antennas sent in the official example is an invalid value. after I modify it, my project work succeed. 

//dest_ant_ids = net_buf_add(*buf, params->num_ant_ids);
dest_ant_ids = net_buf_add(*buf, switch_pattern_len);

Thank you very much for your help