You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
197 lines
4.5 KiB
197 lines
4.5 KiB
/* $Id$ */
|
|
/*.......1.........2.........3.........4.........5.........6.........7.........8
|
|
================================================================================
|
|
|
|
FILE d_buffer/cfunc.mod
|
|
|
|
Copyright 1991
|
|
Georgia Tech Research Corporation, Atlanta, Ga. 30332
|
|
All Rights Reserved
|
|
|
|
PROJECT A-8503-405
|
|
|
|
|
|
AUTHORS
|
|
|
|
14 June 1991 Jeffrey P. Murray
|
|
|
|
|
|
MODIFICATIONS
|
|
|
|
27 Sept 1991 Jeffrey P. Murray
|
|
|
|
|
|
SUMMARY
|
|
|
|
This file contains the functional description of the d_buffer
|
|
code model.
|
|
|
|
|
|
INTERFACES
|
|
|
|
FILE ROUTINE CALLED
|
|
|
|
CMevt.c void *cm_event_alloc()
|
|
void *cm_event_get_ptr()
|
|
|
|
|
|
|
|
REFERENCED FILES
|
|
|
|
Inputs from and outputs to ARGS structure.
|
|
|
|
|
|
NON-STANDARD FEATURES
|
|
|
|
NONE
|
|
|
|
===============================================================================*/
|
|
|
|
/*=== INCLUDE FILES ====================*/
|
|
|
|
|
|
|
|
|
|
/*=== CONSTANTS ========================*/
|
|
|
|
|
|
|
|
|
|
/*=== MACROS ===========================*/
|
|
|
|
|
|
|
|
|
|
/*=== LOCAL VARIABLES & TYPEDEFS =======*/
|
|
|
|
|
|
|
|
|
|
/*=== FUNCTION PROTOTYPE DEFINITIONS ===*/
|
|
|
|
|
|
|
|
|
|
|
|
/*==============================================================================
|
|
|
|
FUNCTION cm_d_buffer()
|
|
|
|
AUTHORS
|
|
|
|
14 Jun 1991 Jeffrey P. Murray
|
|
|
|
MODIFICATIONS
|
|
|
|
27 Sep 1991 Jeffrey P. Murray
|
|
|
|
SUMMARY
|
|
|
|
This function implements the d_buffer code model.
|
|
|
|
INTERFACES
|
|
|
|
FILE ROUTINE CALLED
|
|
|
|
CMevt.c void *cm_event_alloc()
|
|
void *cm_event_get_ptr()
|
|
|
|
RETURNED VALUE
|
|
|
|
Returns inputs and outputs via ARGS structure.
|
|
|
|
GLOBAL VARIABLES
|
|
|
|
NONE
|
|
|
|
NON-STANDARD FEATURES
|
|
|
|
NONE
|
|
|
|
==============================================================================*/
|
|
|
|
/*=== CM_D_BUFFER ROUTINE ===*/
|
|
|
|
/************************************************
|
|
* The following is the model for the *
|
|
* digital buffer for the *
|
|
* ATESSE Version 2.0 system. *
|
|
* *
|
|
* Created 6/14/91 J.P,Murray *
|
|
************************************************/
|
|
|
|
|
|
void cm_d_buffer(ARGS)
|
|
|
|
{
|
|
/*int i;*/ /* generic loop counter index */
|
|
|
|
|
|
|
|
Digital_State_t *out, /* temporary output for buffers */
|
|
*out_old; /* previous output for buffers */
|
|
|
|
|
|
/** Setup required state variables **/
|
|
|
|
if(INIT) { /* initial pass */
|
|
|
|
/* allocate storage for the outputs */
|
|
cm_event_alloc(0,sizeof(Digital_State_t));
|
|
|
|
/* define input loading... */
|
|
LOAD(in) = PARAM(input_load);
|
|
|
|
/* retrieve storage for the outputs */
|
|
out = out_old = (Digital_State_t *) cm_event_get_ptr(0,0);
|
|
|
|
}
|
|
else { /* Retrieve previous values */
|
|
|
|
/* retrieve storage for the outputs */
|
|
out = (Digital_State_t *) cm_event_get_ptr(0,0);
|
|
out_old = (Digital_State_t *) cm_event_get_ptr(0,1);
|
|
}
|
|
|
|
|
|
/** Check on analysis type **/
|
|
|
|
if (ANALYSIS == DC) { /* DC analysis...output w/o delays */
|
|
|
|
OUTPUT_STATE(out) = *out = INPUT_STATE(in);
|
|
|
|
}
|
|
else { /* Transient Analysis */
|
|
|
|
switch ( INPUT_STATE(in) ) {
|
|
|
|
/* fall to zero value */
|
|
case 0: OUTPUT_STATE(out) = *out = 0;
|
|
OUTPUT_DELAY(out) = PARAM(fall_delay);
|
|
break;
|
|
|
|
/* rise to one value */
|
|
case 1: OUTPUT_STATE(out) = *out = 1;
|
|
OUTPUT_DELAY(out) = PARAM(rise_delay);
|
|
break;
|
|
|
|
/* unknown output */
|
|
default:
|
|
OUTPUT_STATE(out) = *out = UNKNOWN;
|
|
|
|
/* based on old value, add rise or fall delay */
|
|
if (0 == *out_old) { /* add rising delay */
|
|
OUTPUT_DELAY(out) = PARAM(rise_delay);
|
|
}
|
|
else { /* add falling delay */
|
|
OUTPUT_DELAY(out) = PARAM(fall_delay);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
OUTPUT_STRENGTH(out) = STRONG;
|
|
}
|
|
|
|
|
|
|