MIL-STD-1553 Reference Manual
Chapter 7 – Bus Controller Functions
Attention for transfers with 32 data words:
Since the maximum buffer size for AIM boards is 32 words, the following data
buffer id (relating to this transfer) has to be used to define the additional word.
This data buffer id then should not be used for other transfers.
5.2.1.8 Bus Switching Test Support
At this test, the BC sends a second command on the alternate bus, while the
first message is not completed. Due to the single encoder/decoder hardware
implementation on the AIM product family, this test can only be handled by the
firmware, if the decoder device on the bus where the first command is sent will
be disabled for the duration of the second message.
Therefore the first command (RT-BC with 32 words) shall be setup as follows:
- rsp = API_BC_RSP_NO_SW1_EXPECTED
- gap_mode = API_BC_GAP_MODE_FAST
Then, the second command shall be initialized with :
- err.type = API_ERR_TYPE_BUS_SWITCH
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