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lconfig.c
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lconfig.c
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/*
This file is part of the LCONFIG laboratory configuration system.
LCONFIG is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
LCONFIG is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with LCONFIG. If not, see <https://www.gnu.org/licenses/>.
Authored by C.Martin crm28@psu.edu
*/
#include <stdio.h> //
#include <stdlib.h> // for rand, malloc, and free
#include <unistd.h> // for sleep
#include <string.h> // for strncmp and strncpy
#include <math.h> // for sin and cos
#include <limits.h> // for MIN/MAX values of integers
#include <time.h> // For time stamp formatting
#include <sys/time.h> // For high-resolution time in COM timeout
#include <LabJackM.h> // duh
#include <stdint.h> // being careful about bit widths
#include <sys/sysinfo.h> // for ram overload checking
#include "lconfig.h"
#include "lcmap.h"
// macros for writing lines to configuration files in WRITE_CONFIG()
#define write_str(param,child) dconf->child[0]!='\0' ? fprintf(ff, "%s \"%s\"\n", #param, dconf->child) : (int) 0
#define write_int(param,child) fprintf(ff, "%s %d\n", #param, dconf->child)
#define write_flt(param,child) fprintf(ff, "%s %f\n", #param, dconf->child)
#define write_aistr(param,child) dconf->aich[ainum].child[0]!='\0' ? fprintf(ff, "%s \"%s\"\n", #param, dconf->aich[ainum].child) : (int) 0
#define write_aiint(param,child) fprintf(ff, "%s %d\n", #param, dconf->aich[ainum].child)
#define write_aiflt(param,child) fprintf(ff, "%s %f\n", #param, dconf->aich[ainum].child)
#define write_aostr(param,child) dconf->aoch[aonum].child[0]!='\0' ? fprintf(ff, "%s \"%s\"\n", #param, dconf->aoch[aonum].child) : (int) 0
#define write_aoint(param,child) fprintf(ff, "%s %d\n", #param, dconf->aoch[aonum].child)
#define write_aoflt(param,child) fprintf(ff, "%s %f\n", #param, dconf->aoch[aonum].child)
#define write_efstr(param,child) dconf->efch[efnum].child[0]!='\0' ? fprintf(ff, "%s \"%s\"\n", #param, dconf->efch[efnum].child) : (int) 0
#define write_efint(param,child) fprintf(ff, "%s %d\n", #param, dconf->efch[efnum].child)
#define write_efflt(param,child) fprintf(ff, "%s %f\n", #param, dconf->efch[efnum].child)
// macro for testing strings
#define streq(a,b) strncmp(a,b,LCONF_MAX_STR)==0
// Macros for error handling
#define print_error(message, ...) fprintf(stderr, LC_FONT_RED message LC_FONT_NULL, ##__VA_ARGS__)
#define print_warning(message, ...) fprintf(stderr, LC_FONT_CYAN message LC_FONT_NULL, ##__VA_ARGS__)
#define loadfail(){\
print_error("LOAD: Connection Number: %d, File Name: \"%s\"\n",\
devnum,filename);\
fclose(ff);\
return LCONF_ERROR;\
}
#define openfail(){\
print_error("OPEN: IP: %s, Serial: %s, Name: \"%s\"\n",\
dconf->ip, dconf->serial, dconf->name);\
LJM_ErrorToString(err, err_str);\
print_error("LJM Error Code: %s\n",err_str);\
lc_close(dconf);\
return LCONF_ERROR;\
}
#define uploadfail(){\
print_error("UPLOAD: IP: %s, Serial: %s, Name: \"%s\"\n",\
dconf->ip, dconf->serial, dconf->name);\
LJM_ErrorToString(err, err_str);\
print_error("LJM Error Code: %s\n",err_str);\
return LCONF_ERROR;\
}
#define startfail(){\
print_error("START_DATA_STREAM: IP: %s, Serial: %s, Name: \"%s\"\n",\
dconf->ip, dconf->serial, dconf->name);\
LJM_ErrorToString(err, err_str);\
print_error("%s\n",err_str);\
return LCONF_ERROR;\
}
/*......................
. Codes for color/font
.......................*/
// Help on Linux terminal control characters
// $man console_codes
// gets the job done.
#define LC_FONT_NULL "\x1b[0m"
#define LC_FONT_RED "\x1b[31m"
#define LC_FONT_GREEN "\x1b[32m"
#define LC_FONT_YELLOW "\x1b[33m"
#define LC_FONT_BLUE "\x1b[34m"
#define LC_FONT_MAGENTA "\x1b[35m"
#define LC_FONT_CYAN "\x1b[36m"
#define LC_FONT_BOLD "\x1b[1m"
// These constants are available for run-time evaluation
// Clear all formatting; return to console defaults
static const char lc_font_null[] = LC_FONT_NULL;
// Font colors
static const char lc_font_red[] = LC_FONT_RED;
static const char lc_font_green[] = LC_FONT_GREEN;
static const char lc_font_yellow[] = LC_FONT_YELLOW;
static const char lc_font_blue[] = LC_FONT_BLUE;
static const char lc_font_magenta[] = LC_FONT_MAGENTA;
static const char lc_font_cyan[] = LC_FONT_CYAN;
// Bold font
static const char lc_font_bold[] = LC_FONT_BOLD;
#define SHOW_PARAM " %-18s : "
/*....................
. Globals
....................*/
char err_str[LJM_MAX_NAME_SIZE];
/*.............................
.
. Algorithm definition
. "Private" functions
.
.............................*/
// Helper funciton to calculate elapsed time in milliseconds from two timeval
// structs.
double difftime_ms(struct timeval *a, struct timeval *b){
return ((double)((a->tv_sec - b->tv_sec)*1000)) - ((double)(a->tv_usec - b->tv_usec))/1000;
}
void strlower(char* target){
char *a;
unsigned int N = 0;
a = target;
while( (*a)!='\0' && N<LCONF_MAX_STR){
if( (*a)>='A' && (*a)<='Z' )
*a += 'a'-'A';
a++;
N++;
}
}
int array_address(const char* root_address, unsigned int channel){
int reg, type;
LJM_NameToAddress(root_address,®,&type);
if(type==0) // 16-bit integer
reg+=channel;
else if(type==1 || type==2 || type==3) // 32 bit vars
reg+=2*channel;
return reg;
}
/* Depreciated - moved away from explicit addressing
void airegisters(const unsigned int channel, int *reg_negative, int *reg_range, int *reg_resolution){
int reg_temp, type_temp;
LJM_NameToAddress("AIN0_NEGATIVE_CH",®_temp,&type_temp);
*reg_negative = reg_temp + channel;
LJM_NameToAddress("AIN0_RANGE",®_temp,&type_temp);
*reg_range = reg_temp + 2*channel;
LJM_NameToAddress("AIN0_RESOLUTION_INDEX",®_temp,&type_temp);
*reg_resolution = reg_temp + channel;
}
void aoregisters(const unsigned int buffer, // The output stream number (not the DAC number)
int *reg_target, // STREAM_OUT#_TARGET (This should point to the DAC register)
int *reg_buffersize, // STREAM_OUT#_BUFFER_SIZE (The memory to allocate to the buffer)
int *reg_enable, // STREAM_OUT#_ENABLE (Is the output stream enabled?)
int *reg_buffer, // STREAM_OUT#_BUFFER_F32 (This is the destination for floating point data)
int *reg_loopsize, // STREAM_OUT#_LOOP_SIZE (The number of samples in the loop)
int *reg_setloop){ // STREAM_OUT#_SET_LOOP (how to interact with the loop; should be 1)
int dummy;
LJM_NameToAddress("STREAM_OUT0_TARGET",reg_target,&dummy);
(*reg_target)+=2*buffer;
LJM_NameToAddress("STREAM_OUT0_BUFFER_SIZE",reg_buffersize,&dummy);
(*reg_buffersize)+=2*buffer;
LJM_NameToAddress("STREAM_OUT0_ENABLE",reg_enable,&dummy);
(*reg_enable)+=2*buffer;
LJM_NameToAddress("STREAM_OUT0_BUFFER_F32",reg_buffer,&dummy);
(*reg_buffer)+=2*buffer;
LJM_NameToAddress("STREAM_OUT0_LOOP_SIZE",reg_loopsize,&dummy);
(*reg_loopsize)+=2*buffer;
LJM_NameToAddress("STREAM_OUT0_SET_LOOP",reg_setloop,&dummy);
(*reg_setloop)+=2*buffer;
}
*/
void read_param(FILE *source, char *param){
int length, quote;
int charin;
// clear the parameter
// if the fscanf operation fails, this will return gracefully
param[0] = '\0';
length = 0;
quote = 0;
while((charin=fgetc(source)) > 0 && length < LCONF_MAX_STR-1){
// Toggle the quote state if this is a quotation mark
if(charin == '"'){
if(quote){
quote = 0;
break;
}else{
quote = 1;
}
// If not in a quote and we found a comment character
}else if(!quote && charin == '#'){
charin = fgetc(source);
// If there are two ## in a row, this is the end of the
// configuraiton header. Force EOF condition and break
if(charin=='#'){
// Rewind so the read_param operation will be stuck on
// the ## character combination
fseek(source, -2, SEEK_CUR);
break;
}
// Read in the rest of the line
while(charin>0 && charin!='\n'){
charin = fgetc(source);
}
// If the word is empty keep reading, otherwise, get out.
if(length>0){
break;
}
// If not in quotes, force lower-case
}else if(!quote && charin>='A' && charin<='Z'){
charin += ('a' - 'A');
param[length++] = charin;
// If this is a whitespace character
}else if(strchr(" \n\r\t", charin)){
// In quotes, witespace is allowed
if(quote){
param[length++] = charin;
// If no text has been discovered yet, keep reading.
// Otherwise that's the end of the parameter.
}else if(length>0){
break;
}
// If this is in the ascii set
}else if(charin >= 0x20 && charin <= 0x7F){
param[length++] = charin;
// For non-ascii or non-whitespace control characters, panic!
}else{
break;
}
}
param[length] = '\0';
}
void init_config(lc_devconf_t* dconf){
int ainum, aonum, metanum, efnum, comnum;
// Global configuration
dconf->connection = LC_CON_NONE;
dconf->connection_act = LC_CON_NONE;
dconf->device = LC_DEV_ANY;
dconf->device_act = LC_DEV_NONE;
dconf->serial[0] = '\0';
dconf->name[0] = '\0';
dconf->ip[0] = '\0';
dconf->gateway[0] = '\0';
dconf->subnet[0] = '\0';
// Global sample settings
dconf->samplehz = -1.;
dconf->settleus = 1.;
dconf->nsample = LCONF_DEF_NSAMPLE;
dconf->dataformat = LC_DF_ASCII;
// Trigger settings
dconf->trigchannel = -1;
dconf->triglevel = 0.;
dconf->trigpre = 0;
dconf->trigmem = 0;
dconf->trigstate = LC_TRIG_IDLE;
dconf->trigedge = LC_EDGE_RISING;
// Metas
for(metanum=0; metanum<LCONF_MAX_META; metanum++)
dconf->meta[metanum].param[0] = '\0';
// Analog Inputs
dconf->naich = 0;
for(ainum=0; ainum<LCONF_MAX_NAICH; ainum++){
dconf->aich[ainum].channel = -1;
dconf->aich[ainum].nchannel = LCONF_DEF_AI_NCH;
dconf->aich[ainum].range = LCONF_DEF_AI_RANGE;
dconf->aich[ainum].resolution = LCONF_DEF_AI_RES;
dconf->aich[ainum].calslope = 1.;
dconf->aich[ainum].calzero = 0.;
dconf->aich[ainum].label[0] = '\0';
strcpy(dconf->aich[ainum].calunits, "V");
}
// Digital input streaming
dconf->distream = 0;
// Digital outputs
dconf->domask = 0x0000;
dconf->dovalue = 0x0000;
// Analog Outputs
dconf->naoch = 0;
for(aonum=0; aonum<LCONF_MAX_NAOCH; aonum++){
dconf->aoch[aonum].channel = -1;
dconf->aoch[aonum].frequency = -1;
dconf->aoch[aonum].signal = LC_AO_CONSTANT;
dconf->aoch[aonum].amplitude = LCONF_DEF_AO_AMP;
dconf->aoch[aonum].offset = LCONF_DEF_AO_OFF;
dconf->aoch[aonum].duty = LCONF_DEF_AO_DUTY;
dconf->aoch[aonum].label[0] = '\0';
}
// Flexible IO
dconf->nefch = 0;
dconf->effrequency = 0.;
for(efnum=0; efnum<LCONF_MAX_NEFCH; efnum++){
dconf->efch[efnum].channel = -1;
dconf->efch[efnum].signal = LC_EF_NONE;
dconf->efch[efnum].edge = LC_EDGE_RISING;
dconf->efch[efnum].debounce = LC_EF_DEBOUNCE_NONE;
dconf->efch[efnum].direction = LC_EF_INPUT;
dconf->efch[efnum].time = 0.;
dconf->efch[efnum].duty = .5;
dconf->efch[efnum].phase = 0.;
dconf->efch[efnum].counts = 0;
dconf->efch[efnum].label[0] = '\0';
}
// Communications
dconf->ncomch = 0;
for(comnum=0; comnum<LCONF_MAX_NCOMCH; comnum++){
dconf->comch[comnum].type = LC_COM_NONE;
dconf->comch[comnum].pin_in = -1;
dconf->comch[comnum].pin_out = -1;
dconf->comch[comnum].pin_clock = -1;
dconf->comch[comnum].rate = -1;
}
dconf->RB.buffer=NULL;
}
int test_digital(lc_devconf_t *dconf){
int efnum;
unsigned int mask;
// output/input conflicts
if(dconf->domask & dconf->distream){
fprintf(stderr, "DISTREAM and DOMASK collide.\n");
return -1;
}
// Check for
for(efnum=0; efnum<dconf->nefch; efnum++){
mask = 1<<dconf->efch[efnum].channel;
if(dconf->efch[efnum].direction == LC_EF_INPUT && (mask & dconf->domask)){
fprintf(stderr, "The %d EF Channel claims channel %d, and collides with DOMASK\n", efnum, dconf->efch[efnum].channel);
return -1;
}else if(dconf->efch[efnum].direction == LC_EF_OUTPUT && (mask & dconf->distream)){
fprintf(stderr, "The %d EF Channel claims channel %d, and collides with DISTREAM\n", efnum, dconf->efch[efnum].channel);
return -1;
}
}
return 0;
}
// Initialization declares the buffer memory and initializes all
// internal variables to describe the buffer's size and read/write oeprations
int init_buffer(lc_ringbuf_t* RB, // Ring buffer struct to initialize
const unsigned int channels, // The number of channels in the stream
const unsigned int samples_per_read, // The samples (scans) per R/W block
const unsigned int blocks){ // The number of R/W blocks to buffer
struct sysinfo sinf;
long unsigned int bytes;
if(RB->buffer){
print_error("lc_ringbuf_t: Buffer not free!\n");
return LCONF_ERROR;
}
RB->samples_per_read = samples_per_read;
RB->samples_read = 0;
RB->samples_streamed = 0;
RB->channels = channels;
RB->blocksize_samples = samples_per_read * channels;
RB->size_samples = RB->blocksize_samples * blocks;
RB->read = 0;
RB->write = 0;
// Do some sanity checking on the buffer size
sysinfo(&sinf);
bytes = RB->size_samples * sizeof(double);
if(sinf.freeram * 0.9 < bytes){
print_error("INIT_BUFFER: Not enough available memory: aborting!\n");
RB->buffer = NULL;
return LCONF_ERROR;
}
RB->buffer = malloc(bytes);
return LCONF_NOERR;
}
int isempty_buffer(lc_ringbuf_t* RB){
return (RB->read == RB->write);
}
int isfull_buffer(lc_ringbuf_t* RB){
return (RB->read == RB->size_samples);
}
// Returns a pointer to the start of the next block to be written
double* get_write_buffer(lc_ringbuf_t* RB){
if(RB->buffer == NULL)
return NULL;
return &RB->buffer[RB->write];
}
// Writing to the buffer is done externally by the LJM module, but after the
// data is written, the buffer variables need to be advanced appropriately.
void service_write_buffer(lc_ringbuf_t* RB){
// advance the write index
RB->write += RB->blocksize_samples;
RB->samples_streamed += RB->samples_per_read;
// Check for wrapping
if(RB->write + RB->blocksize_samples > RB->size_samples)
RB->write = 0;
// If the buffer was just filled
if(RB->write == RB->read)
RB->read = RB->size_samples;
}
// Returns a pointer to the start of the next block to be read
// returns NULL if the buffer is empty
double* get_read_buffer(lc_ringbuf_t* RB){
if(RB->buffer == NULL)
return NULL;
// if the buffer is full
if(RB->read == RB->size_samples)
return &RB->buffer[RB->write];
// if the buffer is empty
else if(RB->read == RB->write)
return NULL;
// Normal operation
else
return &RB->buffer[RB->read];
}
// Updates the buffer's read index once a read operation is complete.
void service_read_buffer(lc_ringbuf_t *RB){
// if the buffer is full
if(RB->read == RB->size_samples)
RB->read = RB->write;
// If the buffer is empty
else if(RB->read == RB->write)
return;
RB->read += RB->blocksize_samples;
RB->samples_read += RB->samples_per_read;
// Check for wrapping
if(RB->read + RB->blocksize_samples > RB->size_samples)
RB->read = 0;
}
// Free the buffer's memory
void clean_buffer(lc_ringbuf_t* RB){
if(RB->buffer){
free(RB->buffer);
RB->buffer = NULL;
}
RB->samples_per_read = 0;
RB->channels = 0;
RB->blocksize_samples = 0;
RB->size_samples = 0;
RB->read = 0;
RB->write = 0;
}
/*....................................
.
. Diagnostic
. "Public" functions
.
......................................*/
int lc_nistream(lc_devconf_t* dconf){
int out;
out = dconf->naich;
if(dconf->distream)
out += 1;
return out;
}
int lc_isopen(lc_devconf_t* dconf){
return (dconf->handle >= 0);
}
int lc_nostream(lc_devconf_t* dconf){
int out;
out = dconf->naoch;
return out;
}
int lc_ndev(lc_devconf_t* dconf, const unsigned int devmax){
int ii;
for(ii=0; ii<devmax; ii++)
if(dconf[ii].connection<0)
return ii;
return devmax;
}
void lc_aichannels(const lc_devconf_t* dconf, int *min, int *max){
switch(dconf->device_act){
case LJM_dtT4:
*min = 0;
*max = 11;
break;
case LJM_dtT7:
*min = 0;
*max = 14;
break;
default:
*min = -1;
*max = -1;
}
}
void lc_aochannels(const lc_devconf_t* dconf, int *min, int *max){
switch(dconf->device_act){
case LJM_dtT4:
*min = 0;
*max = 1;
break;
case LJM_dtT7:
*min = 0;
*max = 1;
break;
default:
*min = -1;
*max = -1;
}
}
void lc_efchannels(const lc_devconf_t* dconf, int *min, int *max){
switch(dconf->device_act){
case LJM_dtT4:
*min = 4;
*max = 9;
break;
case LJM_dtT7:
*min = 0;
*max = 7;
break;
default:
*min = -1;
*max = -1;
}
}
void lc_diochannels(const lc_devconf_t* dconf, int *min, int *max){
switch(dconf->device_act){
case LJM_dtT4:
*min = 4;
*max = 19;
break;
case LJM_dtT7:
*min = 0;
*max = 22;
break;
default:
*min = 0;
*max = 22;
}
}
/*....................................
.
. Algorithm Definition
. "Public" functions
.
......................................*/
int lc_load_config(lc_devconf_t* dconf, const unsigned int devmax, const char* filename){
int devnum=-1, ainum=-1, aonum=-1, efnum=-1, comnum=-1;
int itemp, itemp2, itemp3, itemp4;
float ftemp;
char param[LCONF_MAX_STR], value[LCONF_MAX_STR];
char metatype;
char ctemp;
FILE* ff;
if(devmax>LCONF_MAX_NDEV){
print_error( "LCONFIG: LOAD_CONFIG called with %d devices, but only %d are supported.\n",
devmax, LCONF_MAX_NDEV);
return LCONF_ERROR;
}
// First, initialize the configuration array to have safe values.
for(devnum++;devnum<devmax;devnum++)
init_config( &dconf[devnum] );
// Keep track of a meta type flag as a state machine. If the flag is set
// to a valid value ('f', 'i', or 's') all unrecognized parameters are
// treated as a meta parameter of that type.
metatype = 'n';
// start at the beginning.
devnum = -1;
// open the file
ff = fopen(filename, "r");
if(ff==NULL){
print_error( "LOAD: Failed to open the configuration file \"%s\".\n",filename);
return LCONF_ERROR;
}
// Read the entire file
while(!feof(ff)){
// Read in the parameter name
read_param(ff,param);
// If the read is finished, then dump out
if(param[0] == '\0')
break;
// Read in the parameter's value
read_param(ff,value);
// If we find EOF while looking for a value, raise an error
if(value[0] == '\0'){
print_error( "LOAD: Unexpected end of file while reading parameter: %s\n", param);
loadfail();
}
// Case out the parameters
//
// The CONNECTION parameter
//
if(streq(param,"connection")){
// increment the device index
devnum++;
if(devnum>=devmax){
print_error("LOAD: Too many devices specified. Maximum allowed is %d.\n", devmax);
loadfail();
}
if(lcm_get_value(lcm_connection, value, &dconf[devnum].connection)){
print_error("LOAD: Unrecognized connection type: %s\n",value);
print_error("%s\n","Expected \"usb\", \"eth\", or \"any\".");
loadfail();
}
//
// What if CONNECTION isn't first?
//
}else if(devnum<0){
print_error("LOAD: The first configuration parameter must be \"connection\".\n\
Found \"%s\"\n", param);
return LCONF_ERROR;
}else if(streq(param,"device")){
if(lcm_get_value(lcm_device, value, &dconf[devnum].device)){
print_error( "LOAD: Unrecognized device type: %s\n", value);
print_error( "Expected \"any\" \"t7\" or \"t4\"\n");
loadfail();
}
//
// The NAME parameter
//
}else if(streq(param,"name")){
strncpy(dconf[devnum].name,value,LCONF_MAX_NAME);
//
// The IP parameter
//
}else if(streq(param,"ip")){
strncpy(dconf[devnum].ip,value,LCONF_MAX_STR);
//
// The GATEWAY parameter
//
}else if(streq(param,"gateway")){
strncpy(dconf[devnum].gateway,value,LCONF_MAX_STR);
//
// The SUBNET parameter
//
}else if(streq(param,"subnet")){
strncpy(dconf[devnum].subnet,value,LCONF_MAX_STR);
//
// The SERIAL parameter
//
}else if(streq(param,"serial")){
strncpy(dconf[devnum].serial,value,LCONF_MAX_STR);
//
// The SAMPLEHZ parameter
//
}else if(streq(param,"samplehz")){
if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: Illegal SAMPLEHZ value \"%s\". Expected float.\n",value);
loadfail();
}
dconf[devnum].samplehz = ftemp;
//
// The SETTLEUS parameter
//
}else if(streq(param,"settleus")){
if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: Illegal SETTLEUS value \"%s\". Expected float.\n",value);
loadfail();
}
dconf[devnum].settleus = ftemp;
//
// The NSAMPLE parameter
//
}else if(streq(param,"nsample")){
if(sscanf(value,"%d",&itemp)!=1){
print_error("LOAD: Illegal NSAMPLE value \"%s\". Expected integer.\n",value);
loadfail();
}else if(itemp <= 0)
print_error("LOAD: **WARNING** NSAMPLE value was less than or equal to zero.\n"
" Fix this before initiating a stream!\n");
dconf[devnum].nsample = itemp;
//
// The DATAFORMAT parameter
//
}else if(streq(param, "dataformat")){
if(lcm_get_value(lcm_dataformat, value, &dconf[devnum].dataformat)){
print_error( "LOAD: Unrecognized dataformat: %s\n", value);
print_error( "Expected \"ascii\" \"text\" \"bin\" or \"binary\"\n");
loadfail();
}
//
// The AICHANNEL parameter
//
}else if(streq(param,"aichannel")){
ainum = dconf[devnum].naich;
// Check for an array overrun
if(ainum>=LCONF_MAX_NAICH){
print_error("LOAD: Too many AIchannel definitions. Only %d are allowed.\n",LCONF_MAX_NAICH);
loadfail();
// Make sure the channel number is a valid integer
}else if(sscanf(value,"%d",&itemp)!=1){
print_error("LOAD: Illegal AIchannel number \"%s\". Expected integer.\n",value);
loadfail();
}
// Make sure the channel number is in range for the T7.
if(itemp<0 || itemp>LCONF_MAX_AICH){
print_error("LOAD: AIchannel number %d is out of range [0-%d].\n", itemp, LCONF_MAX_AICH);
loadfail();
}
// increment the number of active channels
dconf[devnum].naich++;
// Set the channel and all the default parameters
dconf[devnum].aich[ainum].channel = itemp;
dconf[devnum].aich[ainum].range = LCONF_DEF_AI_RANGE;
dconf[devnum].aich[ainum].resolution = LCONF_DEF_AI_RES;
dconf[devnum].aich[ainum].nchannel = LCONF_DEF_AI_NCH;
//
// The AIRANGE parameter
//
}else if(streq(param,"airange")){
// Test that there is a configured channel already
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
}
if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: Illegal AIrange number \"%s\". Expected a float.\n",value);
loadfail();
}
dconf[devnum].aich[ainum].range = ftemp;
//
// The AINEGATIVE parameter
//
}else if(streq(param,"ainegative")){
// Test that there is a configured channel already
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
}
// if value is a string specifying ground
if(strncmp(value,"ground",LCONF_MAX_STR)==0){
itemp = LJM_GND;
// If the value is a string specifying a differential connection
}else if(strncmp(value,"differential",LCONF_MAX_STR)==0){
// set the channel to be one greater than the primary aichannel.
itemp = dconf[devnum].aich[ainum].channel+1;
}else if(sscanf(value,"%d",&itemp)!=1){
print_error("LOAD: Illegal AIneg index \"%s\". Expected an integer, \"differential\", or \"ground\".\n",value);
loadfail();
}else if(itemp == LJM_GND){
// bypass further error checking if the index referrs to ground.
}else if(itemp < 0 || itemp > LCONF_MAX_AICH){
print_error("LOAD: AIN negative channel number %d is out of range [0-%d].\n", itemp, LCONF_MAX_AICH);
loadfail();
}else if(itemp%2-1){
print_error("LOAD: Even channels cannot serve as negative channels\n\
and negative channels cannot opperate in differential mode.\n");
loadfail();
}else if(itemp-dconf[devnum].aich[ainum].channel!=1){
print_error("LOAD: Illegal choice of negative channel %d for positive channel %d.\n\
Negative channels must be the odd channel neighboring the\n\
even channels they serve. (e.g. AI0/AI1)\n", itemp, dconf[devnum].aich[ainum].channel);
loadfail();
}
dconf[devnum].aich[ainum].nchannel = itemp;
//
// The AIRESOLUTION parameter
//
}else if(streq(param,"airesolution")){
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
}
if(sscanf(value,"%d",&itemp)!=1){
print_error("LOAD: Illegal AIres index \"%s\". Expected an integer.\n",value);
loadfail();
}else if(itemp < 0 || itemp > LCONF_MAX_AIRES){
print_error("LOAD: AIres index %d is out of range [0-%d].\n", itemp, LCONF_MAX_AIRES);
loadfail();
}
dconf[devnum].aich[ainum].resolution = itemp;
//
// The AICALSLOPE parameter
//
}else if(streq(param,"aicalslope")){
ainum = dconf[devnum].naich-1;
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
// Make sure the coefficient is a valid float
}else if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: Illegal AIcalslope number \"%s\". Expected float.\n",value);
loadfail();
}
dconf[devnum].aich[ainum].calslope = ftemp;
//
// The AICALZERO parameter
//
}else if(streq(param,"aicalzero")){
ainum = dconf[devnum].naich-1;
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
// Make sure the offset is a valid float
}else if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: Illegal AIcaloffset number \"%s\". Expected float.\n",value);
loadfail();
}
dconf[devnum].aich[ainum].calzero = ftemp;
//
// The AICALUNITS parameter
//
}else if(streq(param,"aicalunits")){
ainum = dconf[devnum].naich-1;
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
}
strncpy(dconf[devnum].aich[ainum].calunits, value, LCONF_MAX_STR);
//
// The AILABEL parameter
//
}else if(streq(param,"ailabel")){
ainum = dconf[devnum].naich-1;
if(ainum<0){
print_error("LOAD: Cannot set analog input parameters before the first AIchannel parameter.\n");
loadfail();
}
strncpy(dconf[devnum].aich[ainum].label, value, LCONF_MAX_STR);
//
// The DISTREAM parameter
//
}else if(streq(param,"distream")){
if(sscanf(value, "%d", &itemp)!=1){
print_error(
"LOAD: Expected integer DISTREAM, but found \"%s\"\n",
value);
loadfail();
}else if(itemp < 0 || itemp > 0xFFFF){
print_error(
"LOAD: DISTREAM must be a positive 16-bit mask. Found %d\n",
itemp);
loadfail();
}else if(itemp & dconf[devnum].domask){
print_error(
"LOAD: The DISTREAM mask collides with one of the configured digital outputs.\n");
loadfail();
}
dconf[devnum].distream = itemp;
//
// The DOX
//
}else if(sscanf(param, "do%d", &itemp) == 1){
if(sscanf(value, "%d", &itemp2)!=1 || itemp2<0 || itemp2>1){
print_error(
"LOAD: DO%d received unexpected value: %s\n",
itemp, value);
loadfail();
}
lc_diochannels(&dconf[devnum], &itemp3, &itemp4);
if(itemp < itemp3 || itemp > itemp4){
print_error(
"LOAD: DO%d is not between DO%d and DO%d\n",
itemp, itemp3, itemp4);
loadfail();
}
itemp = 1<<itemp;
dconf[devnum].domask |= itemp;
if(itemp2)
dconf[devnum].dovalue |= itemp;
else
dconf[devnum].dovalue &= ~itemp;
//
// The AOCHANNEL parameter
//
}else if(streq(param,"aochannel")){
aonum = dconf[devnum].naoch;
// Check for an array overrun
if(aonum>=LCONF_MAX_NAOCH){
print_error("LOAD: Too many AOchannel definitions. Only %d are allowed.\n",LCONF_MAX_NAOCH);
loadfail();
// Make sure the channel number is a valid integer
}else if(sscanf(value,"%d",&itemp)!=1){
print_error("LOAD: Illegal AOchannel number \"%s\". Expected integer.\n",value);
loadfail();
}
// Make sure the channel number is in range for the T7.
if(itemp<0 || itemp>LCONF_MAX_AOCH){
print_error("LOAD: AOchannel number %d is out of range [0-%d].\n", itemp, LCONF_MAX_AOCH);
loadfail();
}
// increment the number of active channels
dconf[devnum].naoch++;
// Set the channel and all the default parameters
dconf[devnum].aoch[aonum].channel = itemp;
dconf[devnum].aoch[aonum].signal = LC_AO_CONSTANT;
dconf[devnum].aoch[aonum].amplitude = LCONF_DEF_AO_AMP;
dconf[devnum].aoch[aonum].offset = LCONF_DEF_AO_OFF;
dconf[devnum].aoch[aonum].duty = LCONF_DEF_AO_DUTY;
//
// The AOSIGNAL parameter
//
}else if(streq(param,"aosignal")){
if(aonum<0){
print_error("LOAD: Cannot set analog output parameters before the first AOchannel parameter.\n");
loadfail();
}
if(lcm_get_value(lcm_aosignal, value, (int*) &dconf[devnum].aoch[aonum].signal)){
print_error("LOAD: Illegal AOsignal type: %s\n",value);
loadfail();
}
//
// AOFREQUENCY
//
}else if(streq(param,"aofrequency")){
if(aonum<0){
print_error("LOAD: Cannot set analog output parameters before the first AOchannel parameter.\n");
loadfail();
// Convert the string into a float
}else if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: AOfrequency expected float, but found: %s\n", value);
loadfail();
}else if(ftemp<=0){
print_error("LOAD: AOfrequency must be positive. Found: %f\n", ftemp);
loadfail();
}
dconf[devnum].aoch[aonum].frequency = ftemp;
//
// AOAMPLITUDE
//
}else if(streq(param,"aoamplitude")){
if(aonum<0){
print_error("LOAD: Cannot set analog output parameters before the first AOchannel parameter.\n");
loadfail();
// Convert the string into a float
}else if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: AOamplitude expected float, but found: %s\n", value);
loadfail();
}
dconf[devnum].aoch[aonum].amplitude = ftemp;
//
// AOOFFSET
//
}else if(streq(param,"aooffset")){
aonum = dconf[devnum].naoch-1;
if(aonum<0){
print_error("LOAD: Cannot set analog output parameters before the first AOchannel parameter.\n");
loadfail();
// Convert the string into a float
}else if(sscanf(value,"%f",&ftemp)!=1){
print_error("LOAD: AOoffset expected float, but found: %s\n", value);
loadfail();
}else if(ftemp<0. || ftemp>5.){
print_error("LOAD: AOoffset must be between 0 and 5 volts. Found %f.", ftemp);
loadfail();
}
dconf[devnum].aoch[aonum].offset = ftemp;
//
// AODUTY parameter
//
}else if(streq(param,"aoduty")){
aonum = dconf[devnum].naoch-1;