abaco systems CEI-520 - Program Interface Library (API); API Overview and OS Support

CEI-100/CEI-200/CEI-x20 User’s Manual 55
CHAPTER 5
Program Interface Library
Overview
An extensive software Application Programmers Interface (API) to the
CEI-100/200/x20 ARINC interface boards is supplied. Functions are
supplied to setup the interface and to transmit/receive data.
Data is transmitted by writing it into the transmit buffers. The ARINC
interface continuously checks the transmit buffers for data, and when data
is found, it is sent as soon as possible. On-board message scheduling is
also available on the CEI-200 and all CEI-x20 boards.
When data is received from an input channel, the interface places it in that
channel’s buffer.
On the CEI-100 board, all three buffers (two receive and one transmit) are
512 ARINC-words in size. On the DTI-1073-4, all three buffers are 128
ARINC words in size.
Table 38 shows the transmitter and receiver buffer sizes for the various
configurations of the CEI-200.
Table 38. CEI-200 Buffer Size Table
Number of
Channels
16K Memory
Configuration
32K Memory
Configuration
Rx
Tx
Rx
Tx
Rx
Tx
2
2
4 Kb
2 Kb
8 Kb
4 Kb
4
2
2 Kb
2 Kb
4 Kb
4 Kb
4
4
2 Kb
1 Kb
4 Kb
2 Kb
6
3
1 Kb
2 Kb
2 Kb
4 Kb
8
4
1 Kb
1 Kb
2 Kb
2 Kb
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