Maxim Integrated 73M1822/73M1922 Control Module - Manual (Page 31)

UG_1x22_053 73M1822/73M1922 Control Module User Guide
Rev. 1.0 31
6.2.3 M1X22_BAT_GET
Description
Gets the current battery status of the modem line. The driver maintains this status in its local variable and
it is being retrieved by user application using this command.
#define M1X22_BAT_GET _IOWR(0xA4,0xB6,unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1X22_BAT_GET,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1X22_BAT_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 – The modem line is not powered.
1 – The modem line is connected to the PSTN and being powered.