Maxim-integrated 73M1866B/73M1966B Reference Driver Manual do Utilizador descarregar pdf (Página 42)

73M1866B/73M1966B Reference Driver User Guide UG_1x66B_015

42 Rev. 2.7

6.2.4 M1966_POH_GET

Description

Gets the current “parallel phone off-hook” status of the FXO line. The driver maintains this status in its

local variable and it is being retrieved by user application using this command.

#define M1966_POH_GET _IOWR(0xA4,0xB9,unsigned int)

Prototype

int ioctl (

int chan_fd,

int M1966_POH_GET,

unsigned long param );

Parameters

Data Type Name Description

int

chan_fd

Channel descriptor.

int

M1966_POH_GET

I/O control identifier for this operation.

unsigned long

param

N/A.

Return Values

Data Type Description

int

The return value can be either of the following:

0 – No parallel phone off-hook on the FXO line.

1 – A parallel phone off-hook on the FXO line.

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Maxim-integrated 73M1866B/73M1966B Reference Driver Manual do Utilizador Página 42