abaco systems CEI-520 - Ar_Putword; ARINC 429 Transmit Data Format; ARINC 573;717 Transmit Data Format; Table 43. ARINC 573;717 Transmit Buffer

Program Interface Library AR_PUTWORD
CEI-100/CEI-200/CEI-x20 User’s Manual 122
AR_PUTWORD
CEI_INT16 ar_putword (CEI_INT16 board, CEI_INT16 channel,
CEI_INT32 xmit_data);
This routine puts an ARINC word in the transmit buffer for a particular
channel.
ARINC 429 Transmit Data Format
For the CEI-100/200 the ARINC 429 word must be in the transmission
format:
32 14
13 12
11 10
9
8 1
DATA
SDI
SSM
P
LABEL
To convert a word from standard ARINC format to this format, see
AR_REFORMAT. This routine puts the data in an ARINC transmit
queue. When this routine returns, the data has not necessarily been put out
on the ARINC bus. It has been put only in a buffer. If other data is in the
transmit buffer ahead of it, it is transmitted in turn.
The CEI-x20 automatically performs all necessary conversion to and from
transmission mode. For this product, this function should be called with a
word in standard ARINC format. For the CEI-x20, since no conversion is
required, the AR_REFORMAT function performs no operation, it simply
returns without modifying the specified ARINC word. This maintains
capability with applications written for the CEI-100/200.
ARINC 573/717 Transmit Data Format
The CEI-x20 supports protocols besides ARINC 429. For board channels
configured as ARINC 573/717, the transmit word must be formatted by the
application as follows:
Table 43. ARINC 573/717 Transmit Buffer
31 - 12
11 - 0
X
Data (MSB-LSB)
Syntax
Description
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