In aperiodic mode the user application is in complete control of the transmission.

The mxfA429TxAperiodicWrite() function is used to send a FIFO buffer containing one or many ARINC 429 words.

After the application is initialized and the channel is set, the application must allocate a buffer of MXF_A429_DATAREC record objects. The ARINC 429 32-bit word is stored using the data field.

The transmit timing is controlled by the record timeTag field in conjunctions with the startTime parameter of the function mxfA429TxAperiodicWrite().

The aperiodic modes of transmission can be defined as follows:

Basic Transmission

In this mode, a relative start time can be specified to send the records. The records are then sent back-to-back. The record's time tag can't be used.
Transmission with Absolute Timing

In this mode, an absolute start time is specified to send the records. The records are then sent back-to-back. The record's time tag can't be used.
Transmission with Record Timing

In this mode, each record's time tag is set in the future (in sequence) for the transmission of the records. The start time can't be used with this option.
Transmission with Record Relative Timing

With this method, the records' time tag specify the relative time between each records for transmission. The start time can't be used with this option.

Explanation of these transmission modes with some examples follows in the next section.