Chapter 3 Analog Output Timing/ControlDAQ-STC Technical Reference Manual3-34 ©National Instruments Corporation}ao_tick_count_to_use = ao_tick_count_to_use + 1;AO_BC_TC_Interrupt_ack = 1;If (ao_shut_down_isr is 2) then{/*Check for error between the last BC_TC of one stage and the trigger for the nextstage*/If (AO_BC_TC_Trigger_Error_St is 1) then{Inform user that a BC_TC trigger error has occurred;AO_BC_TC_Trigger_Error_Confirm = 1;/*This is optional*/}}If (AO_BC_TC_Error_St is 1) then{Inform user that a BC_TC error has occurred;/*You need to reprogram analog output circuitry to get things back on track*/}}3.6.3 Changing Update Rate during an Output Operation for PrimaryAnalog Output GroupUse this function to change the update rate during an output operation if you are notperforming waveform staging. The variable ao_last_load_register keeps track ofwhich load registers should be used. This variable was first introduced in the AO_Countingfunction.Function AO_Rate_Change{Begin critical section;If (ao_last_load_register is A){If (AO_UI_Next_Load_Source_St is 0) then{AO_UI_Load_B = number of clocks between updates - 1;If (change update rate immediately) thenAO_UI_Switch_Load_On_TC = 1;Else if (change update rate at the end of the current MISB) thenAO_UI_Switch_Load_On_BC_TC = 1;ao_last_load_register = B;}ElseInform user that rate change is impossible at this time;}Else{
