Silicon Laboratories Si446 Series, Руководство пользователя

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66 Rev. 0.1
3.5.41. PKT_LEN
 Summary: Provides information regarding how to use the length from the received packet.
 Purpose:

This property is used for variable length packet reception.
 Property: 0x1208
 Default: 0x00
 Fields:

ENDIAN - default:0
0x0 = The length field is least significant byte first.
0x1 = The length field is most significant byte first.

SIZE - default:0
0x0 = The length field is one byte in length.
0x1 = The length field is two bytes in length.

IN_FIFO - default:0
0x0 = The data bytes containing the length field are not put in the fifo.
0x1 = The data bytes containing the length field are put in the fifo.

DST_FIELD[2:0] - default:0x0
Selects field number that will vary in length.
A value of 0 in this field specifies fixed packet length mode. Field 2 to 5 can be designated as variable length field.
 Register View
3.5.42. PKT_LEN_FIELD_SOURCE
 Summary: Field number containing the embedded length field.
 Purpose:

This property is used in variable packet mode defining where the length field is in the packet.

The length field must be the last byte in a fixed length field and precede the variable length field
 Property: 0x1209
 Default: 0
 Fields:

SRC_FIELD[2:0] - default:0x0
Selects field number that contains the length field.
A value of 0 in this field is treated as 1.
Range: 0–4
 Register View
PKT_LEN
7 6 5 4 3 2 1 0
0x0 ENDIAN SIZE IN_FIFO DST_FIELD[2:0]
0x0 0 0 0 0x0
PKT_LEN_FIELD_SOURCE
7 6 5 4 3 2 1 0
0x00 SRC_FIELD[2:0]
0x00 0x0