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dwm_anchor_list_get

Reads the list of surrounding anchors and works for anchors only. Anchors in the list can be from the same network or neighbor network.

void dwm_anchor_list_get(dwm_anchor_list_t *list)

Parameters

• input – (SPI/UART) ‘0’ | ‘1’(page number (only on SPI/UART, the user application reads whole list in 1 call), valid numbers are 0,1)

• input – (user application) (none)

• output – err_code, cnt, {node_id, position, rssi, seat, neighbor_network}

• cnt – ? 1 byte? (element count, 15 is maximum for SPI/UART, 30 is maximum for user application)

• node_id – ? 2 bytes ? (anchor ID)

• position – ? 12 bytes ?

• rssi – ? 1 byte signed? (signal strength indicator)

• seat – ? 5 bits ? (seat number occupied by the anchor)

• neighbor_network – ? 1 bit ? (status flags that indicates if anchor is from current network or if it is from neighbor network)

C code example

dwm_anchor_list_t list;
int i;
dwm_anchor_list_get(&list);
for (i:0; i < list.cnt; ++i) {
     printf("%d. id=0x%04X pos=[%ld,%ld,%ld] rssi=%d seat=%u neighbor=%d\n", i,
                     list.v[i].node_id,
                     list.v[i].x,
                     list.v[i].y,
                     list.v[i].z,
                     list.v[i].rssi,
                     list.v[i].seat,
                     list.v[i].neighbor_network);
}

SPI/UART example 1

TLV request
type	length	value
0x0B	0x01	0x00

Type 0x0B means command dwm_an_list_get

TLV response
type	length	value (see error codes)
0x40	0x01	0x00

TLV response (residue of the frame from previous table)
** type**	le ngth	v alue
0x56	0xE1	u int8_t - number of el ements e ncoded in the Value	uint16 _t - UWB addres s in little endian	3 x in t32_t: po sition coord inates x,y,z in little endian	int8_ t - RSS I	u int8_t - (bits 0-4) seat number (bit 5) neighb or_net work (bits 6-7) re served	…
		0x0F	anchor nr. 1				nr. 2 … nr. 15

Type 0x40 means err_code of the previous command

Type 0x56 means anchor list

SPI/UART example 2

TLV request
type	length	value
0x0B	0x01	0x01

Type 0x0B means command dwm_an_list_get

TLV response (anchor list is empty)
type	length	value (see error codes)	type	length	value
0x40	0x01	0x00	0x56	0x01	uint8_t - number of elements encoded in the Value
					0x00

Type 0x40 means err_code of the previous command

Type 0x56 means anchor list