acq400_Permit implementation. More...

#include "acq400_Permit.h"
#include "acq400_PermitLut.h"
#include "acq400_Proxy.h"
#include "anatrg.h"
#include "acq-util.h"
#include "split2.h"
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <string.h>

Classes
class	acq400_Permit_AI
class	acq400_Permit_DI

Macros
#define	DN __FILE__
#define	FN __FUNCTION__
#define	MARK fprintf(stderr, "%s %d\n", FN, __LINE__)
#define	MARKI(p)
#define	DI_NELEM 2
#define	FM32 0xffffffff

Functions
int	acq400_Permit_Configure (const char *portName, int site, int is_ai, int nchan)
void	acq400_Permit_Register (void)
	epicsExportRegistrar (acq400_Permit_Register)

Detailed Description

acq400_Permit implementation.

Strategy:

Permit Prams take up 0x300 BRAM space.
task will update Permit Prams at a suitable moment (right after DMA done)
updating the BRAM must be as fast as possible. We propose a raw cache (R_cache) scheme so that
only dirty words are written.
We have up to 128*4 = 512 discrete AI logical prams. These are stored by in a backing store
L_cache, and must be converted to RAW data while the R_cache is not being flushed. The sequence is then:

Records thread:

user Locks the LR update
user writes as many LPrams as required, filling the LCache, and marking dirty entries
user Unlocks LR
task: wakes on DMA done, flushes R-cache with highest priority.
- then, if LR_UPDATE is unlocked, runs through the L_cache "cooking" L-values
- (perhaps using Anatrg) to generate Raw ABCD values Created on: 14 Aug 2026 Author: pgm

Macro Definition Documentation

◆ DI_NELEM

#define DI_NELEM 2

active, state

◆ MARKI

#define MARKI ( p )

Value:

fprintf(stderr, "%s %d P_ %s:%d\n", FN, __LINE__, #p, p)

Function Documentation

◆ acq400_Permit_Configure()

int acq400_Permit_Configure	(	const char *	portName,
		int	site,
		int	is_ai,
		int	nchan )

EPICS iocsh callable function to call constructor for the testAsynPortDriver class.

Parameters

[in] portName The name of the asyn port driver to be created.

Classes