MIL-STD-1553 Reference Manual
Chapter 9 – Bus Monitor Functions
9 BUS MONITOR FUNCTIONS
Chapter 9 defines the Bus Monitor function calls of the API S/W Library. The BM functions
provide configuration of the Bus Monitor for Chronological recording of all or filtered data
streams. Single or multiple sequenced triggers can be programmed to trigger on error, word
and/or data word in limits. The function calls in this table are listed in a functional order,
however, the detailed descriptions of the BM function calls in the following sections are in
alphabetical order
Table 9-I – Bus Monitor Function Descriptions
Reads BM Bus Activity transfer/error counters
Configures the Capture/Recording mode of the BM
Define a dytag monitor id
Read the actual dytag monitor status
Disables the monitoring of specific RT SA/Mode codes
Defines the bit pattern to be used by the BM to initiate a Start
Trigger Event and/or Stop Trigger Event used for Start/Stop of
the “Data Capture”
Starts the chronological BM operation
Sets up the BM to tag/not tag illegal command transfers to
specific RT SA/Mode codes
Initializes the Bus Monitor
Defines the command words used for filtering 1553 transfers to
determine what data the BM will record when in Message Filter
Recording Mode
Enables/disables the generation of interrupt and strobe outputs
for various BM conditions
Retrieves multiple 1553 message transfers from the Monitor
Buffer in one of four special formats (for data recorded in
Message Filter Recording Mode)
Reads the BM transfer/error counters for a specified RT
Reads the BM transfer/error counters for a specified RT
Subaddress
Finds a specific BM entry in the Monitor buffer
Obtains information about a specific BM entry in the BM buffer
Obtains the BM buffer pointers to be used to index into the
Monitor Buffer to read entries
Starts the chronological BM operation
Reads the status of the BM
Enables the bits in the BM Status Word Exception Mask to be
used by the BM to check the status word for errors/exceptions
Sets up the Trigger Control Block which defines the conditions
evaluated by the BM to generate a Start/Stop Trigger Event
Defines the next Trigger Control Block to be evaluated for the
next trigger
Arms the BM with the Triggers to be evaluated
Creates a Data Queue on the ASP
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