Sends Frequency Shift Key (FSK) data.

DWORD adiStartSendingFSK( CTAHD ctahd,
void *buffer,
unsigned bufsize,
ADI_FSKSEND_PARMS *parms)

ctahd Context handle returned by adiOpenPort.

buffer Buffer to send.

bufsize Size of buffer to send.

parms Pointer to FSK send parameters, as follows (NULL designates default values):

typedef struct
{
 DWORD size;    /* Size of this structure            */
 DWORD noseizureflag;   /* No channel seizure when set   */
 INT32 level;    /* Transmit output scaling (dBm)     */
 DWORD seizetime;  /* Length of channel seizure in (ms) */
 DWORD marktime;   
   /* Length of the initial mark signal in (ms) */
 DWORD baudrate;    /* Baud rate (only 1200 supported)   */
} ADI_FSKSEND_PARMS;

• SUCCESS
• CTAERR_BAD_ARGUMENT
• CTAERR_FUNCTION_ACTIVE
• CTAERR_INVALID_CTAHD
• CTAERR_INVALID_STATE

• ADIEVN_FSK_SEND_DONE
  This event is generated by AG Access when the send function terminates. The event value field contains one of the following termination conditions:
• CTAERR_xxx or ADIERR_xxx
  Function failed.
• CTA_REASON_FINISHED
  The buffer submitted was sent in its entirety.
• CTA_REASON_RELEASED
  The call was terminated.
• CTA_REASON_STOPPED
  Stopped by application request.

This function requires that adsix.dsp has been loaded by agmon.

This function initiates sending Frequency Shift Key (FSK) data. When parms is set to NULL, the default parameter values are used. A typical buffer size is 512 bytes. The buffer size is limited to half the value of the maxbufsize field in the ADI_CONTEXT_INFO structure. The only baud rate supported is 1200.

The function may be stopped by calling adiStopSendingFSK. An ADIEVN_FSK_SEND_DONE event is delivered when the send operation is complete.

adiStopSendingFSK

#define MYSEND_STOPPED (-13)

int mySendFSK( CTAHD ctahd, void *buffer, unsigned bufsize )
{
    ADI_EVENT event;

    if( adiStartSendingFSK( ctahd, buffer, bufsize, NULL ) != SUCCESS )
        return MYFAILURE;

    do 
    {
        myGetEvent( &event );           /* see adiFetchAndProcess example */
    } while( event.id !=- ADIEVN_FSK_SEND_DONE );

    switch( event.value )
    {
        case CTA_REASON_FINISHED:
            return SUCCESS;

        case CTA_REASON_RELEASED:
            return MYDISCONNECT;

        case CTA_REASON_STOPPED:
            /* Send was stopped by another application thread */
            return MYSEND_STOPPED;

        default:
            if( IS_ADI_ERROR( event.value ) )
                return MYFAILURE;
    }
    return MYFAILURE;
}