Maxim Integrated 73M1822/73M1922 Modem API - Manual (Page 33)

UG_1x22_055 73M1822/73M1922 Modem API User Guide
Rev. 1.0 33
5 Sample Application
This section illustrates how an application can be implemented using the Modem APIs. The sample
program is a typical telephony application that automatically answers the call when a ring burst is
detected. This is accomplished by simply going off-hook.
Note: This sample program will definitely not compile and is not a complete application. It is intended
only for demonstration purpose to show the capability and to illustrate the interaction between the
application program and the Modem API.
/****************************************************************
**
** sample application
**
** Perform the following:
** - Initialize the API subsystem – M1X22_ApiInit()
** - Open the device
- M1X22_OpenDevice()
** - Open each channel - M1X22_OpenChannel()
** - Initialize channel - M1X22_InitChannel()
**
*****************************************************************/
int main (int argc, char **argv)
{
M1X22_CHAN_INIT chanInit;
M1X22_HANDLE pFxoDev;
/* Initialize the API subsystem */
if (M1X22_MdmApiInit() != M1X22_SUCCESS)
return (-1);
/* Open device descriptor with event callback function */
pFxoDev = M1X22_OpenDevice(“/dev/ter”, &fxoEventCallback);
if (pFxoDev == NULL)
return (-1);
/* For each channel descriptor */
for (i=0; i<MAX_DAA_INSTALLED; i++)
{
/* Open the channel descriptor */
channles[i].pHandle = M1X22_OpenChannel(“/dev/ter”, pFxoDev, i);
if (channels[i].pHandle == NULL)
return (-1);
/* Initialize the channel for operation in US */
if (M1X22_InitChannel (channels[i].pHandle, M1X22_CNTRY_CODE_US)
!= M1X22_SUCCESS)
return (-1);
}
/* program main loop */
While (1)
{
/* this is the main program loop…
/* . . . */
}
/* Release the API subsystem before exiting */