DocID022544 Rev 3

9/23

AN4018

Service description

4

Service description

4.1

System initialization services

These services provide functions to initialize the data link layer, to configure and manage

the modulation frequency of the power line modem.

4.1.1

Data link initialization

void DL_Init(u8 DLType)

Description:

This function initializes the data link layer, with default parameters; the default parameters

are:

•

Frequency: 86000 Hz, 72000 Hz

•

Rx mode: high channel only

•

Rx H/L channel modulation: all PSK modulation

•

Current control: enabled

•

Gain: 21

•

Zero crossing delay: 0

•

PSK preamble length: 32 bits

•

FSK baud rate: 2400 bps

•

FSK deviation: 1

•

FSK preamble length: 32 bit

•

FSK unique word length: 16 bit

•

FSK unique word: 0x9B58

Input parameters:

•

DLType

: this parameter defines the data link type, master, slave or simple node; the

value accepted is: “DL_MASTER”, “DL_SLAVE” or “DL_SIMPLE_NODE”.

Output parameters:

None.

Return value:

None.

Note:

This function must be called during the system startup.