Aim MIL-STD-1553 - Apicmdscopetriggerdef

MIL-STD-1553 Reference Manual
398
Chapter 9 – Bus Monitor Functions
9.1.38 ApiCmdScopeTriggerDef
Prototype:
ApiCmdScopeTriggerDef( AiUInt32 ulModuleHandle, TY_API_SCOPE_TRG
*px_ScopeTrg );
Driver Command:
TG_API_SCOPE_TRG_DEF (0xF8)
Purpose:
This function is used to define a trigger condition for the APX, ACX MIL-Scope.
Note: This function is only usable with AIM’s APX, ACX MIL-Scope module.
Note: Every 3
rd
valid sample is checked for the trigger condition. This means, that
spikes who are smaller than 3*20ns*sampling rate may not be triggered!
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Pointer to the list of TY_API_SCOPE_TRG structure elements
typedef struct ty_api_scope_trg
{
AiUInt32 ul_TrgMode;
AiUInt32 ul_TrgSrc;
AiUInt32 ul_TrgValue;
AiUInt32 ul_TrgNbSamples;
AiUInt32 ul_TrgFlags;
AiUInt32 ul_TrgDelay;
AiUInt32 ul_TrgTbt;
} TY_API_SCOPE_TRG;
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Trigger mode on which condition the trigger is activated
Value
Constant
Description
0
API_SCOPE_MODE_GREATER_THAN
Higher than the value given in parameter
ul_TrgValue (rising edge)
1
API_SCOPE_MODE_LESS_THAN
Lower than the value given in parameter
ul_TrgValue (falling edge)
2
API_SCOPE_MODE_GREATER_OR_LESS_THAN
Higher than the positive value given in
parameter ul_TrgValue or
Lower than the negative value given in
parameter ul_TrgValue
3
-
Reserved
4
API_SCOPE_MODE_GREATER_THAN_SAMPLES
Higher than the value given in parameter
ul_TrgValue for a given number of
samples (parameter ul_TrgNbSamples)
(high pulse)
5
API_SCOPE_MODE_LESS_THAN_SAMPLES
Lower than the value given in parameter
ul_TrgValue for a given number of
samples (parameter ul_TrgNbSamples)
(low pulse)
7
API_SCOPE_MODE_BIU
The MilScope is triggered by the BIU
trigger, which has to be setup with the
function ApiCmdBMTCBIni()