Maxim Integrated 73M1822/73M1922 Control Module - Manual (Page 47)

UG_1x22_053 73M1822/73M1922 Control Module User Guide
Rev. 1.0 47
6.5.2 M1X22_SET_RING_MIN_FREQ
Description
Upon detection of a ring burst the driver will attempt to determine the ring burst frequency. If the ring
burst frequency is above the minimum ring frequency and below the maximum frequency then the driver
will report an M1X22_RING_DETECT event.
#define M1X22_SET_RING_MIN_FREQ _IOWR(0xA4, 0xE3, unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1X22_SET_RING_MIN_FREQ,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1X22_SET_ RING_MIN_FREQ I/O control identifier for this operation.
unsigned long param Frequency in Hz.
Return Values
Data Type Description
int Always returns 0.
6.5.3 M1X22_SET_RING_MAX_FREQ
Description
Upon detection of a ring burst the driver will attempt to determine the ring burst frequency. If the ring
burst frequency is above the minimum ring frequency and below the maximum frequency, then the driver
will report an M1X22_RING_DETECT event.
#define M1X22_SET_RING_MAX_FREQ _IOWR(0xA4, 0xE4, unsigned int)
Prototype
int ioctl (
int chan_fd,
int M1X22_SET_RING_MIN_FREQ,
unsigned long param );
Parameters
Data Type Name Description
int chan_fd Channel descriptor.
int M1X22_SET_ RING_MAX_FREQ I/O control identifier for this operation.
unsigned long param Frequency in Hz.
Return Values
Data Type Description
int Always returns 0.