Order in Which User-Supplied Functions are Called

Table 60 through Table 63 illustrate the following 3 essential instrument operations:

These tables are representative of a typical order of invocation. Some functions may be used more than once, particularly since Measure involves looping through different bias levels. The column Function Category indicates the location of further information about the function in What Makes up an IC-CAP Driver. Other valuable information is located in the comments for each function, provided in user_instr.hxx, user_unit.hxx, user_meas.hxx, and user_meas.cxx.

During Rebuild

During this operation, the Hardware Manager locates addresses that respond to a serial poll. At each such address, available drivers determine if they own the instrument, until 1 driver succeeds. They try in the order shown in the Instrument Library list. Note that unless find_instr() is successful, none of the ensuing functions are called.

The functions called during Rebuild (instrument list) are shown in the following table.

Table 60 Functions Called During Rebuild (instrument list)

Function Name	Function Category
get_addl_addr	Hardware Editor Operations
addl_addr_label
find_instr
units_configurable
rebuild_units or build_units
find_units
set_found
unit_count
get_unit

During Calibrate

During this operation the Measurer initiates calibration procedures for each instrument in a Setup that has calibration supported by IC-CAP.

The functions called during Calibrate are shown in the following table.

Table 61 Functions Called During Calibrate 

Function Name	Function Category
instr::find_instr	Setup Checking
unit::get_int_bias	Control and Data Acquisition Functions
unit::can_source	Checking of Inputs
unit::can_source_vs_time	Checking of Inputs
unit::can_measure_vs_time	Checking of Outputs
unit::can_measure	Checking of Outputs
unit::bias_compatible	Setup Checking
unit::check_sweep	Checking of Inputs
unit::check_sync	Checking of Inputs
instr::cal_possible	Calibration
instr::find_instr	Setup Checking
instr::do_cal	Calibration

During Measure

This operation undertakes a potentially complex series of operations on the instruments used by a Setup. The exact functions called vary, depending on whether calibration is available for particular instruments, and whether the main sweep instrument operates in an internally swept fashion, or in a stepped/spot-mode fashion (the case when the instrument option Use User Sweep is set to Yes for the main sweep instrument).

The functions called during Measure are shown in the following table (user main sweep) and Table 63 (internal main sweep).

Table 62 Functions Called During Measure (with User Main Sweep) 

Function Name	Function Category	Notes
instr::find_instr	Setup Checking
instr::find_units	Hardware Editor Operations
instr::set_found	Hardware Editor Operations
unit::get_int_bias	Control and Data Acquisition Functions
unit::can_source	Checking of Inputs
unit::can_source_vs_time	Checking of Inputs
unit::can_measure_vs_time	Checking of Outputs
unit::can_measure	Checking of Outputs
unit::bias_compatible	Setup Checking
instr::reset_instr_info	Initialization
unit::check_sweep	Checking of Inputs
unit::check_sync	Checking of Inputs
instr::reset_outptrs	Initialization
unit::check_out	Checking of Outputs
unit::can_do_second_sweep	Control and Data Acquisition Functions
instr::cal_possible	Calibration
instr::recall_n_chk_calib	Calibration
instr::init_instr	Initialization
instr::zero_supplies	Initialization
BEGIN BIAS LOOP		Loop to END BIAS LOOP
unit::set_bias	Control and Data Acquisition
unit::enable_output	Initialization
unit::set_scalar	Control and Data Acquisition
BEGIN USER MAIN SWEEP LOOP		Loop to END MAIN SWEEP
unit::wait_hold_time	Control and Data Acquisition
unit::set_bias	Control and Data Acquisition
unit::set_sync	Control and Data Acquisition
unit::wait_delay_time	Control and Data Acquisition
unit::get_data	Control and Data Acquisition
unit::get_scalar_data	Control and Data Acquisition
END MAIN SWEEP LOOP
END BIAS LOOP
instr::zero_supplies	Initialization
unit::fill_outds	Control and Data Acquisition

Table 63 Functions Called During Measure (with Internal Main Sweep) 

Function Name	Function Category	Notes
instr::find_instr	Setup Checking
instr::find_units	Hardware Editor Operations
instr::set_found	Hardware Editor Operations
unit::get_int_bias	Control and Data Acquisition Functions
unit::can_source	Checking of Inputs
unit::can_source_vs_time	Checking of Inputs
unit::can_measure_vs_time	Checking of Outputs
unit::can_measure	Checking of Outputs
unit::bias_compatible	Setup Checking
instr::reset_instr_info	Initialization
unit::check_sweep	Checking of Inputs
unit::check_sync	Checking of Inputs
instr::reset_outptrs	Initialization
unit::check_out	Checking of Outputs
unit::can_do_second_sweep	Control and Data Acquisition Functions
instr::cal_possible	Calibration
instr::recall_n_chk_calib	Calibration
instr::init_instr	Initialization
instr::zero_supplies	Initialization
BEGIN BIAS LOOP		Loop through END BIAS LOOP below
unit::set_bias	Control and Data Acquisition
unit::enable_output	Initialization
unit::set_scalar	Control and Data Acquisition
unit::enable_sync	Control and Data Acquisition
unit::set_2_internal_sweeps	Initialization
unit::set_internal_sweep	Initialization
unit::set_bias	Control and Data Acquisition
unit::set_sync	Control and Data Acquisition
unit::trigger	Control and Data Acquisition
unit::wait_data_ready	Control and Data Acquisition
unit::get_data	Control and Data Acquisition
unit::get_scalar_data	Control and Data Acquisition
END BIAS LOOP
instr::zero_supplies	Initialization
unit::fill_outds	Control and Data Acquisition