Direction_finding_Connectionless_rx

[Zack_Lee]

Hi all, i had some problems on showing IQ data. how can i output my IQ values? im using 52833dk. 

[Nathan_INOSI]

Hi Zack_Lee

As i can see, we're both working on the same example and having the same issues. Do you successfully receive packet from tx example ? Because i do, but not data are coming out. Here's below my output from rx example on nrf52833dk with antenna matrix from Nordic.

*** Booting Zephyr OS build v2.6.0-rc1-ncs1-rc1  ***
Starting Connectionless Locator Demo
Bluetooth initialization...success
Scan callbacks register...success.
Periodic Advertising callbacks register...success.
Start scanning...success
Waiting for periodic advertising...
[DEVICE]: 24:D4:13:1A:76:61 (random), AD evt type 5, Tx Pwr: 127, RSSI -43 DF Connectionless Beacon App C:0 S:0 D:0 SR:0 E:1 Prim: LE 1M, Secn: LE 2M, Interval: 0x0780 (2400 ms), SID: 0
success. Found periodic advertising.
Creating Periodic Advertising Sync...success.
Waiting for periodic sync...
[DEVICE]: 7F:D0:DA:D4:CB:A1 (random), AD evt type 0, Tx Pwr: 127, RSSI -68  C:1 S:1 D:0 SR:0 E:0 Prim: LE 1M, Secn: No packets, Interval: 0x0000 (0 ms), SID: 255
[DEVICE]: 7F:D0:DA:D4:CB:A1 (random), AD evt type 4, Tx Pwr: 127, RSSI -68  C:1 S:1 D:0 SR:1 E:0 Prim: LE 1M, Secn: No packets, Interval: 0x0000 (0 ms), SID: 255
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random) synced, Interval 0x0780 (2400 ms), PHY LE 2M
success. Periodic sync established.
Enable receiving of CTE...
success. CTE receive enabled.
Scan disable...Success.
Waiting for periodic sync lost...
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random), tx_power 127, RSSI -40, CTE AOA, data length 0, data: 
CTE[0]: samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -400
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random), tx_power 127, RSSI -41, CTE AOA, data length 0, data: 
CTE[0]: samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -410
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random), tx_power 127, RSSI -41, CTE AOA, data length 0, data: 
CTE[0]: samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -410
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random), tx_power 127, RSSI -43, CTE AOA, data length 0, data: 
CTE[0]: samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -430
PER_ADV_SYNC[0]: [DEVICE]: 24:D4:13:1A:76:61 (random), tx_power 127, RSSI -42, CTE AOA, data length 0, data: 
CTE[0]: samples count 45, cte type AOA, slot durations: 2 [us], packet status CRC OK, RSSI -420

The data length is 0 and i expect IQ data. Are you in this siutation Zack ?

Sorry for the trouble-post, but i though it's similar to your case so an unique answer from Nordic dev could help both of us.

Nathan

[Nathan_INOSI]

Hi Zack,

It's a data struct, not a function. For me, it is defined in main.c at ligne 53

static const char *cte_type2str(uint8_t type)
{
	switch (type) {
	case BT_DF_CTE_TYPE_AOA: return "AOA";
	case BT_DF_CTE_TYPE_AOD_1US: return "AOD 1 [us]";
	case BT_DF_CTE_TYPE_AOD_2US: return "AOD 2 [us]";
	case BT_DF_CTE_TYPE_NONE: return "";
	default: return "Unknown";
	}
}

I use NRF SDK V1.6.0-rc2 on toolchain manager, do you use the same ?

[Zack_Lee]

i download it from nrf_connect_sdk from github, i thought it should be the same

[Nathan_INOSI]

Maybe the problem come from here. I don't know which is best, but by toolchain manager it works fine for now. I suggest you to do the same.

[Zack_Lee]

yup im downloading now from toolchain thank you!