Question about LakeShore 325 Temp.Controller

Hi guys,
I'm using the LakeShore 325 Temperature Controller for some measures. And i got stucked with this problem: i need to divide the ramp by segments. Which means that the ramp will not start from 0 all time. My idea is to make 1 ramp divided at a maximum of 4 segments. For ex: 1st segment from 100K to 200K, 2nd ramp from 250K to 400K, etc..
The problem is that i can't find that option on the instrument driver. It only allows me to configure the ramp, which means, that i can insert it's rate and if i'm going to have a set point or not. And the other option that is on the instrument driver is the configuration of the setpoint, that only allows me to insert 1 setpoint. What should i do? I need 2 setpoints, 1 for the minimum temperature and 1 for max. temperature.
I can't use the PID control, and i'm attaching the drivers here with 1 sketch of my main VI.
Thanks in advance.
TN
Currently using LV 8.5
Attachments:
lake_shore_325.zip ‏744 KB
new_test.vi ‏56 KB

Dear Maholtz,
First of all, I invite you to create a new thread for each new question, and to lik related topics into this new thread.
Now, about the instrument driver, the readme file clearly indicates that it is designed for LabVIEW 8.0 or later. To get version of those VIs for LabVIEW 6.1, I think you have two options:
1. Downgrade the existing version of the instruments driver using "Save for previous version" option. You will need a version of LabVIEW 8.x to downgrade to LabVIEW 8.0, then LabVIEW 8.0 to downgrade it in LabVIEW 7.1, and so on. this option exposes you to code compatibility issues, if some of the functionnality used by the LV 8.0 driver are not avilable under previous versions of LabVIEW.
2. Ask LakeShore for an instrument driver that supports LabVIEW 6.1.
Hope this helps,
.mrLeft{float:left} .mrInfo{border-left:solid 1px #989898;font-size:x-small;color:#989898}
Mathieu R.
  CTD - Certified TestStand Developer / Développeur TestStand Certifié
  CLAD - Certified LabVIEW Associate Developer

Similar Messages

Question about Wireless Design and Controller

Hi Everyone,
Although I am not new to Cisco, I have somewhat limited experience with Wireless in general. I was hoping to get your help with the following:
We currently have a total of 8 1130AG, 4 on each floor. They were configured a few years ago, and now we are looking to update the design a bit. Each AP has its own SSID, and just provide internet access. Looking at the configuration, I noticed that they are not configured to use proper channels, just random channels (9, 10, 11, instead of 1, 6, 11, etc.). I noticed that when I roam between one AP to another, I lose about 4-8 pings before I re-establish connectivity again.
Here are my questions:
1. Do I need a controller in order to use just one SSID for the whole setup instead of the 8 seprate ones we currently have?
2. Will the controller helps in providing seamless transition when a client roams between AP's?
3. Is it normal to loose connectivity roaming around?
4. Can I reconfigure the current setup to use just one SSID and provide better transition between AP without the use of a controller?
5. Which controller would you recommend?
We don't have a need to anything fancy ,I am aware that I can enable multiple SSID, VLAN's, etc. Just trying to keep it as simple as possible, yet reliable.
Your input is appreciate.
Thanks

1. With 8 AP's only, a WLC would be nice-to-have but not necessary. You can configure WLSE and it will do some limited functions.
2. This depends on the signal strengths, wireless coverage and configuration. If you enable WLSE, for instance, and you have no wireless black spots, then roaming should be no issues.
3. See #2.
4. You can configure multiple SSID (up to 16 are broadcasted) but if one AP doesn't have the SSID you use for roaming, the association will drop when the client tries to join that particular AP. It's like mobile phone towers. If your carrier is not in the area, you sure won't be able to use your mobile phone in that area.
5. For 8 1130 APs, I'd recommend the smallest of the lot: 2106 with either 6, 12 or 25 AP licenses. I'd recommend you the 25 AP licenses. If your finances allow you something bigger, then consider either the 4402 (25 AP licenses) or the 5508.
Cisco 2100 Series Wireless LAN Controllers
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps7206/ps7221/product_data_sheet0900aecd805aaab9.html
Cisco 4400 Series Wireless LAN Controllers
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps6307/product_data_sheet0900aecd802570b0_ps6366_Products_Data_Sheet.html
Cisco 5500 Series Wireless Controllers Data Sheet
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps10315/data_sheet_c78-521631.html

Question about PGA and TEMP usage

hi,
we had a situation whereby OEM was reporting that because the PGA was too small during a time frame that extra I/O on the TEMP was being created. Does this then mean that the TEMP was acting as a pseudo PGA.
regards

Have a look at these threads
Re: PGA memory problem - Oracle 10.2.0.4 on windows 2003
Re: PGA Memory Usage Details
<br>
Oracle Database FAQs
</br>

ODI and Essbase - question about updating structure (temp otls)

Hi,
versions:
ODI 11.1.1
essbase 11.1.2.2.1 (linux)
I'm running an interface that intends to update a dimension structure with the data from my respective dimension in Oracle relational. Actually a pretty simple interface using the KM "IKM SQL to
Hyperion Essbase (METADATA)". The execution is running fine with no errors and the structure is updated as expected, however we noticed that there are otl files being created in a tmp folder and they're never deleted. This folder is in the essbase server (/tmp). If I run this interface many times in a day, I'll have as many files in this folder as executions I did. So my question is if anybody knows why those files are being created and why they are not removed from there when the interface execution ends.
Thinking ahead, I'll have to create a shell script to clean up this folder in order to never have storage issues with those temporary otl files.
Thanks in advance for any contributions
Eduardo

     Agreed.
     I also think those files were created by the java APIs. Just for testing purposes, I ran the rule manually and those otls were not created. This is one more reason for me to believe on this theory.
     However, what makes me think is: no one else got this issue? What are you guys doing with those files?
     Maybe there is some setup I have to do and those files will not be created anymore.
Thanks,
Eduardo

Question about Mega651's IR-controller

Hi!!
I use the Mega 651 as a media PC. Can the included IR-Device be used to turn the PC on??
Which settings do I have to make??
Pls help!!

1. With 8 AP's only, a WLC would be nice-to-have but not necessary. You can configure WLSE and it will do some limited functions.
2. This depends on the signal strengths, wireless coverage and configuration. If you enable WLSE, for instance, and you have no wireless black spots, then roaming should be no issues.
3. See #2.
4. You can configure multiple SSID (up to 16 are broadcasted) but if one AP doesn't have the SSID you use for roaming, the association will drop when the client tries to join that particular AP. It's like mobile phone towers. If your carrier is not in the area, you sure won't be able to use your mobile phone in that area.
5. For 8 1130 APs, I'd recommend the smallest of the lot: 2106 with either 6, 12 or 25 AP licenses. I'd recommend you the 25 AP licenses. If your finances allow you something bigger, then consider either the 4402 (25 AP licenses) or the 5508.
Cisco 2100 Series Wireless LAN Controllers
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps7206/ps7221/product_data_sheet0900aecd805aaab9.html
Cisco 4400 Series Wireless LAN Controllers
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps6307/product_data_sheet0900aecd802570b0_ps6366_Products_Data_Sheet.html
Cisco 5500 Series Wireless Controllers Data Sheet
http://www.cisco.com/en/US/prod/collateral/wireless/ps6302/ps8322/ps10315/data_sheet_c78-521631.html

Question about CPU temperature

Hi, I have just built a new system with the following,
Motherboard - MSI 760GM-P23 (FX)
CPU FX 6300
and as this is my first venture over to the AMD side of PC's I have some questions about the CPU temp.
The image below is from my system under load, I'm told that the temp readings from AMD CPU's are not accurate below 40c?
The FX 6300 'package temp' cant be accurate with a low of 13c it's simply not possible in a room that's almost 20c.
What is TMPIN1? I hope that's not my actual CPU temp as 69c is way to high. and a Google search for TMPIN1 brings up lots of forum posts regarding MSI boards, Hence my post here.
TMPIN0 looks like the most likely sensor for CPU temp but I'm just not sure, so which one is it? and where is TMPIN1 reading it's info from?
Regards and many thanks, Dave

What you see with HWINFO is the readings from two different sources. One is the reported temp by the AMD sensor, the other is the same temp but as reported and translated by the Fintek chip that MSI generally uses on their boards.
The differences in readings boils down to the digital signal to analog conversion by the two data suppliers, .i.e AMD sensor/Fintek chip.
If in doubt, always use the higher reported temp as the acceptable one. Quite frankly, I would think what the Fintek reports is probably close to what the real temps are. Common sense will dictate that what you see from the AMD sensor is virtually impossible unless you use liquid cooling.
Also remember that the software in use may differ in readings slightly.
The Fintek chip is reporting 2 CPU temps. I summise the higher as being the CPU core and the lower value as being a sensor in the vicinity of the CPU that MSI has added.
Comparing the info with your HW Monitor, I further believe that TMPIN1 is the same as the Fintek CPU higher temp. TMPIN2 is the one for the lower CPU value in HWINFO and TMPIN0 is probably your southbridge.
If you wish, run both these software packages at the same time and stress your machine in Prime95, Then you can monitor and figure out which ones are going up or down in unison. You may also find that the temps will be a lot closer then.

K8N Diamond Plus- bios freeze & question about temp/voltage monitor

A weird issue I had right after I setup my mobo last night was that I could not access the "PC Health" portion of the bios. If I tried selecting it, it would just freeze. Is this a known issue? I'm hoping a bios update may solve this one. Does anyone know anything about this?

Well I was mostly just asking if this was a known issue, so I guess "no" is all the answer I need... Now, what would be my best solution? I am assuming bios update, is there anything else that I should consider?
But if it helps, as I said its a brand new build, so I'm running the default bios. 1.00. My other components are: Silverstone Zeus 560w, 2GB of G.Skill pc4000, Raptor 74gb, 7900gtx, Opteron 165.
Also, since my other thread was locked (I figured seperating two different topics would make it easier for people to respond to specific questions, I apologize,) here's my other question pasted:
"I just set up my new system with this motherboard (K8N Diamond Plus,) an Opteron 165, Scythe Mine heatsink, and a Silverstone Zeus 560w. Its these components that lead to my question-
I am getting temps of about 31C idle, 41C load. Nice temps yes, but I'm not sure how accurate those are. That means that it is idling at 86F in a room that was probably in the high 70's, maybe 80. Seems a little too good to be true, but then again, I am used to Intel's furnace-like temps
Its the voltage reading that has me a bit more concerned though. Corecenter is reading my +5v as 5.36v, and my +12v as 12.28v. The +3.3v is reading about spot-on at 3.33v. I'm hoping that someone else who has this motherboard can tell me this- are the readings in Corecenter for this motherboard generally accurate, and should I be concerned about this?"
Thanks for any help you can give. No sig yet because I just registered an hour ago, I'll work on it.

Questions about 1003051 - TDMS 3.0 corrections - Composite SAP Note

Experts:
We, from a big SAP shop, want to set up TDMS for ERP, BI, HCM and CRM.
We have some questions about note 1003051:
1) Is this note about ERP (and HCM) only? If so, what are the notes for TDMS on BI and CRM?
2) Should we apply this note to all systems involved: sender, controller (SM7.0 in our case) and receiver?
3) We have enhp1...enhp4 in our ERP (and HCM), enhp1 on BI and perhaps enhp1 on CRM (not sure yet).
a) What is the impact of enhp on TDMS?
b) should we install TDMS before applying enhp OR the sequence does not matter?
Thanks for your help!

1) Is this note about ERP (and HCM) only? If so, what are the notes for TDMS on BI and CRM?
>This is a composite note, and contains information about various other notes related to TDMS. Refer to each note mentioned in this note individually to assess the same.
2) Should we apply this note to all systems involved: sender, controller (SM7.0 in our case) and receiver?
>Depends from note to note, Each note contains the necessary information about the system it has to be installed on.
3) We have enhp1...enhp4 in our ERP (and HCM), enhp1 on BI and perhaps enhp1 on CRM (not sure yet).
a) What is the impact of enhp on TDMS?
>TDMS in standard supports Basis 7.0 systems. However it generally works fine with 7.01 too.
b) should we install TDMS before applying enhp OR the sequence does not matter?
>As TDMS 3.0 is only available for systems with basis 4.6C to 7.0. So install TDMS first and then the EHP.
I hope these answers help.
Regards
Pankaj.

Question about "synchronized" and "wait"

Hello, everyone!
I have seen a piece of code like this,
synchronized (lock)
//do operation 1
lock.wait();
//do operation 2
I think in the above piece of code, when a thead finished operation 1, it will release the lock and let other threads waiting for the lock have chance to run the same block of code. Am I correct?
If I am correct, I have a further question, a "synchronized" block means a set of operations that can not be interrupted, but when invoke "wait" method, the thread running in the "synchronized" block will be terminated (interrupted) by release the lock and other threads will have chance to enter the "synchronized" block. In short, the execution inside the "synchronized" block will be interrupted. So, I wonder whether the above piece of code is correct and conforms to the principle of "synchronized". And what is its real use?
Thanks in advance,
George

Thanks, pkwooster buddy!You're welcome
I just wondered whether "wait inside a synchronized
block" technology is thread safe. Please look at the
following example,wait and synchronized are thread safe.
public class Foo {
int mVal= 0;
public final Object mLock = ...;
public void doIt() {
synchronized(mLock) {
mVal = ...;
mLock.wait();
if (mVal == ...) {
// do something
} else {
// do something else
}If we have two threads, T1 and T2, enter the block in
their respective order, and T1 is woken up first, T2
may have tampered with T1's execution path because T2
changed mVal while T1 was asleep. So T2 manipulate
instance field mVal is a side-effect.when you do the wait() you give up the lock and the other threads get a chance to run. When you exit the wait() you get the new value of the myVal variable which may have been changed. This is exactly what you want. To make that not thread save you could do
int temp = myVal;
wait();
if(temp == ...)in this case the variable temp contains the old vale of myVal.
>
I think the most safest way is never wait inside a
synchronized block, but it is less efficient. What do
you think about the trick of wait inside a
synchronized block? I think you are very experienced
in thread field from your kind reply.
Thanks in advance,
Georgewait(), notify() and notifyAll() are very useful. You need them when you want threads to cooperate in an predictable manner. I recommend that you review the section on consumer and producer classes and wait and notify in the Threads Tutorial. It gives good examples. For a practical example of this you could also take a look at my Multithreaded Server Example. It implements a simple chat server that switches String messages. Look especially at the send(), doSend() and popMessage() methods in the StreamConnection class. These allow the receive thread of one user to send messages out using the send thread of another user. If you have questions about that example, please post the questions on that topic.
Hope this helps.

Some questions about Unity 4.0 and IPC

I have a couple of questions and I was looking for "real world" answers, not specific answers from the design guide.
1.What is this bandwidth requirement between Exchange and Unity and what is it used for?
2. What sort of issues would we experience if we placed the Unity UM Server at the Colo and placed the Exchange server at the customer premise; with a single T1 between the sites?
3.What else is involved with a Unity UM install vs. a Unity VM install?
4.Does the Unity UM and Exchange servers have to be running AD?
5. Can Unity or the Exchange box be the Domain Controller? Or does it need to be a separate server?
6. Where does a vm message get streamed from? The Unity server or the Exchange server?

No you do not pay for FaceTime. It uses your WiFi network, so if you have access to WiFi it is free.
There is no server required for FaceTime, it will use a direct device to device protocol.
I can't answer the question about using phones in different countries as that will depend on if you buy a phone that is locked to a carrier.
If you buy a phone in Germany and it is locked to a German phone network then it will most likely not work with a SIM from Turkey. You would need to buy an unlocked phone which are very expensive as they do not have any carrier subsidy applied to the price.

Performing temperature sweep with lakeshore 340 temperature controller

I am working on a design project to run a temperature sweep using a lakeshore 340 temperature controller. I need it to increase in steps, wait for the temperature to stabilize and then ramp up to the next setpoint. I need to be able to repeat this process a finite amount of times. I believe I could check if it is stabilized using Booleans and a sequence structure, but I don't know anything about changing the setpoint automatically if anyone could help at all that would be really great. Thanks.

The instructions for how to set the temperature should be available at their website. I do not know what commands it uses since it is not an NI product.
Kyle K.
Product Manager for Product Data
National Instruments

I hava a question about RMI,please help me!

Ladys and Gentleman,I hava a question about RMI.I wirte four little programs in java that is about RMI on my PC.
import java.rmi.*;
public interface AddServerIntf extends Remote{
double add(double d1,double d2) throws RemoteException;
import java.rmi.*;
import java.rmi.server.*;
public class AddServerImpl extends UnicastRemoteObject implements AddServerIntf{
public AddServerImpl() throws RemoteException{
public double add(double d1,double d2)throws RemoteException{
return d1+d2;
import java.net.*;
import java.rmi.*;
public class AddServer{
public static void main(String args[]){
try{
AddServerImpl addServerImpl=new AddServerImpl();
Naming.rebind("AddServer",addServerImpl);
}catch(Exception e){
e.printStackTrace();
import java.rmi.*;
public class AddClient
     public static void main(String args[]){
     try{
     String addServerURL="rmi://"+args[0]+"/AddServer";
     AddServerIntf addServerIntf=(AddServerIntf) Naming.lookup(addServerURL);
     System.out.println("The first number is: "+args[1]);
     double d1=Double.valueOf(args[1]).doubleValue();
     System.out.println("The second number is: "+args[2]);
     double d2=Double.valueOf(args[2]).doubleValue();
     System.out.print("The sum is: "+addServerIntf.add(d1,d2));
     }catch(Exception e){
     System.out.println("Exception: "+e);
And I compiled these files,so I got 4 class files(AddServer.class,AddServerIntf.class,AddServerImpl.class,AddServerClient.class).Then I use "rmic AddServerImpl" got another two files(AddServerImpl_Skel.class and AddServerImpl_Stub.class).Then I input command:rmiregistry,in another window,I input command:java AddServer,I got some exceptions,I was confused by these exceptions.The exception is:
D:\MyJava\rmi_3>java AddServer
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: AddServerImpl_Stub
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: AddServerImpl_Stub
java.lang.ClassNotFoundException: AddServerImpl_Stub
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Unknown Source)
at AddServer.main(AddServer.java:8)
But some times this exception will not appeared.Who can give me answer or suggestion,thanks a lot.
By the way,when I run shutdown.bat in tomcat_root\bin,I can get some exceptions:
C:\Tomcat\bin>shutdown
Using CATALINA_BASE: ..
Using CATALINA_HOME: ..
Using CATALINA_TMPDIR: ..\temp
Using JAVA_HOME: C:\JDK
Catalina.stop: java.net.ConnectException: Connection refused: connect
java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:350)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:137)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:124)
at java.net.Socket.<init>(Socket.java:268)
at java.net.Socket.<init>(Socket.java:95)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:579)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:402)
at org.apache.catalina.startup.Catalina.process(Catalina.java:180)
at java.lang.reflect.Method.invoke(Native Method)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:203)
I use Windows server 2000+JDK 1.3.1_04+tomcat 4.1.7

Maybe I am off base here but it seems to me the problem is the way in which you bind your server. The server must be bound to the same address and you are looking up from, i.e. "rmi://" host "/AddServer"
so
Naming.rebind("AddServer",addServerImpl);should be
Naming.rebind("rmi://127.0.0.1/AddServer", addServerImpl);to match
String addServerURL="rmi://"+args[0]+"/AddServer";
AddServerIntf addServerIntf=(AddServerIntf)
Naming.lookup(addServerURL);Hopefully this will solve your problem, if not it is a problem with your classpath. An easy way to make sure it can see your files is to set the java.rmi.server.codebase to point to where your classes are, e.g.
java -Djava.rmi.server.codebase=file:"c:\\cygwin\\home\\tweak\\keck_folder\\cmsi401\\RMIGalaxySleuth\\classes\\" AddServer
I had to set the codebas for my rmi stuff to work no matter how much I messed with the classpath.
Hope this helps,
Will

Take readings from Lakeshore 336 T controller through VISA TCPIP, but very slow

I connected a Lakeshore 336 Temperature controller to a PC ethernet card by using a normal RJ45 cable.
The VISA resource name is set as "tcpip::192.168.0.12::7777::socket". But the readings is very slow. It takes about 2 seconds for reading one sensor data. But the manual says "10 readings/second".
I tried both Lakeshore 336 Temperature controller and PC connected to a router, but the same slow speed.
How can I get reading as fast as GPIB interface using Ethernet port?
Thanks.
LV2013SP1@Win7Pro
WT

Attached are the snapshots of the front panel and block diagram (with 2 probes) of the VI reading LS336 sensor.
There are 2 probes inserted. One is right after VISA Write, which shows no error; the other one is right after VISA Read, which shows error. But strangely, the VI still acquires the sensor readings correctly even the error occurs.
Thanks in advance.
WT

Question about UDP 16667

I have a quick question about UDP 16667, it is said in configuration guide that:
“IPSec encryption can also be configured for the inter-controller mobility messages, in which case port 16667 is used.”
My question is how to configure IPSec to support it? I can’t find any document describe this. Thanks for any input!

That is the only command required if you want to enable secure mobility. So UPD port 16667 will need to be allowed, but 16666 doesn't need to be since you are using secure mobility. Now depending on how your setup, you will need other ports allowed if required:
Q. What ports do I need to permit for Lightweight Access Point Protocol (LWAPP) communication when there is a firewall in the network?
A. You must enable these ports:
Enable these UDP ports for LWAPP traffic:
Data - 12222
Control - 12223
Enable these UDP ports for Mobility traffic:
16666 - Secured Mode
16667 - Unsecured Mode
Mobility and data messages are usually exchanged through EtherIP packets. IP protocol 97 must be allowed on the firewall to allow EtherIP packets. If you use ESP to encapsulate mobility packets, you have to permit ISAKMP through the firewall when you open UDP port 500. You also have to open the IP protocol 50 to allow the encrypted data to pass through the firewall.
These ports are optional (depending on your requirements):
TCP 161 and 162 for SNMP (for the Wireless Control System [WCS])
UDP 69 for TFTP
TCP 80 and/or 443 for HTTP or HTTPS for GUI access
TCP 23 and/or 22 for Telnet or secure shell (SSH) for CLI access

A question about Xapp524 written by Marc Defossez

Hi Marc Defossez,
I have a question about Xapp524. Pls check the figure below. I find the frame pattern should be "00001111". But in the source code AdcFrame.vhd, I find the frame pattern is IntPatternA, IntPatternB, IntPatternC or IntPatternD which donot include "00001111". I cannot understand why. Could you explain it to more detail?
Thanks
Rgds
Orange

Hi, Thanks for your reply. I don't know what version it is. But in the xapp524 “readme.txt” is found
1. REVISION HISTORY
Readme
Date Version Revision Description
=========================================================================
19/08/2012 1.0 Initial Xilinx release.
=========================================================================
So i guess the version may be 1.0.
The code makes me confused is in the AdcFrame.vhd.
-- A std_logic_vector is converted to a string.
function stdlvec_to_str(inp: std_logic_vector) return string is
variable temp: string(inp'left+1 downto 1) := (others => 'X');
begin
for i in inp'reverse_range loop
if (inp(i) = '1') then
temp(i+1) := '1';
elsif (inp(i) = '0') then
temp(i+1) := '0';
end if;
end loop;
return temp;
end function stdlvec_to_str;
-- A string is converted to a std_logic_vector.
function str_to_stdlvec(Inp: string) return std_logic_vector is
variable Temp : std_logic_vector(Inp'range) := (others => 'X');
begin
for i in Inp'range loop
if (Inp(i) = '1') then
Temp(i) := '1';
elsif (Inp(i) = '0') then
Temp(i) := '0';
end if;
end loop;
return Temp;
end function str_to_stdlvec;
-- In two wire mode a 12 bit ADC has 2 channels of 6 bits. The AdcBits stay at 12.
-- In two wire mode a 14 bit ADC has 2 channels of 8 bits. The AdcBits is set at 16.
-- In two wire mode a 16 bit ADC has 2 channels of 8 bits. The AdcBits stay at 16.
function FrmBits (Bits : integer) return integer is
variable Temp : integer;
begin
if (Bits = 12) then
Temp := 12;
elsif (Bits = 14) then
Temp := 16;
elsif (Bits = 16) then
Temp := 16;
end if;
return Temp;
end function FrmBits;
-- Word symmetry check
-- A word (16-bit) is checked for bit pair symmetry
-- Example: In one byte there are 16 possible symmetry positions.
-- 00000000, 00000011, 00001100, 00001111,
-- 00110000, 00110011, 00111100, 00111111,
-- 11000000, 11000011, 11001100, 11001111,
-- 11110000, 11110011, 11111100, 11111111,
-- Bit_7=Bit_6, Bit_5=Bit_4, Bit_3=Bit_2, and Bit_1=Bit_0
function SymChck (Inp: std_logic_vector) return std_logic is
variable Temp : std_logic_vector ((Inp'left-1)/2 downto 0) := (others => '0');
variable Sym : std_logic := '0';
begin
for n in (Inp'left-1)/2 downto 0 loop
Temp(n) := Inp((n*2)+1) xor Inp(n*2);
Sym := Temp(n) or Sym;
end loop;
assert false
report CR & " Pattern XORed/ORed = " & stdlvec_to_str(Temp) & CR
severity note;
return Sym;
end function SymChck;
-- When a symmetric byte, bit pattern is found, make the requested pattern rotate
-- by one bit to become a non-symmetric pattern.
function BitShft(Inp: std_logic_vector; Wire: integer) return std_logic_vector is
variable Temp : std_logic_vector (Inp'range):= (others => '0');
begin
-- Bit shift all bits.
-- Example: 16-bit frame word = 11111111_00000000 or 00000000_11110000
-- After shifting the word returned looks as: 11111110_00000001 and 00000000_01111000
if (SymChck(Inp) = '0') then
if (Wire = 1 ) then -- 1-wire, shift 15-bits
for n in Inp'left downto 0 loop
if (n /= 0) then
Temp(n) := Inp(n-1);
elsif (n = 0) then
Temp(Temp'right) := Inp(Inp'left);
end if;
end loop;
else -- (Wire = 2) -- 2-wire, shift 8-bits
for n in (Inp'left-8) downto 0 loop
if (n /= 0) then
Temp(n) := Inp(n-1);
elsif (n = 0) then
Temp(Temp'right) := Inp(Inp'left-8);
end if;
end loop;
end if;
elsif (SymChck(Inp) = '1') then
-- Don't do anything, return the word as it came in.
Temp := Inp;
end if;
assert false
report CR &
" Pattern Shifted = " & stdlvec_to_str(Temp) & CR &
" Comparator Value A = " & stdlvec_to_str(Temp(15 downto 8)) & CR &
" Comparator Value B = " & stdlvec_to_str(Temp(7 downto 0)) & CR
severity note;
return Temp;
end function BitShft;
-- Bit swap operation:
-- Bit n of the output string gets bit n-1 of the input. ex: out(7) <= In(6).
-- Bit n-1 of the output string gets bit n of the input. ex: out(6) <= In(7).
-- Bit n-2 of the output string gets bit n-3 of the input. ex: out(5) <= In(4).
-- Bit n-3 of the output string gets bit n-2 of the input. ex: out(4) <= In(5).
-- and etcetera....
-- This: Bit_7, Bit_6, Bit_5, Bit_4, Bit_3, Bit_2, Bit_1, Bit_0.
-- Results in: Bit_6, Bit_7, Bit-$, Bit_5, Bit_2, Bit_3, Bit_0, Bit_1.
function BitSwap(Inp: std_logic_vector) return std_logic_vector is
variable Temp : std_logic_vector (Inp'range);
begin
for n in (Inp'left-1)/2 downto 0 loop
Temp((n*2)+1) := Inp(n*2);
Temp(n*2) := Inp((n*2)+1);
end loop;
assert false
report CR &
" Pattern Bit Swapped = " & stdlvec_to_str(Temp) & CR &
" Comparator Value C = " & stdlvec_to_str(Temp(15 downto 8)) & CR &
" Comparator Value D = " & stdlvec_to_str(Temp(7 downto 0)) & CR
severity note;
return Temp;
end function BitSwap;
function TermOrNot (Term : integer) return boolean is
begin
if (Term = 0) then
return FALSE;
else
return TRUE;
end if;
end TermOrNot;
-- Constants
-- Transform the pattern STRING into a std_logic_vector.
constant IntPattern :
std_logic_vector(FrmBits(C_AdcBits)-1 downto 0) := str_to_stdlvec(C_FrmPattern);
-- Shift the pattern for one bit.
constant IntPatternBitShifted :
std_logic_vector(FrmBits(C_AdcBits)-1 downto 0) := BitShft(IntPattern, C_AdcWireInt);
-- Bit swap the by one bit shifted pattern.
constant IntPatternBitSwapped :
std_logic_vector(FrmBits(C_AdcBits)-1 downto 0) := BitSwap(IntPatternBitShifted);
-- Define the bytes for pattern comparison.
constant IntPatternA : std_logic_vector((FrmBits(C_AdcBits)/2)-1 downto 0) :=
IntPatternBitShifted(FrmBits(C_AdcBits)-1 downto FrmBits(C_AdcBits)/2);
constant IntPatternB : std_logic_vector((FrmBits(C_AdcBits)/2)-1 downto 0) :=
IntPatternBitShifted((FrmBits(C_AdcBits)/2)-1 downto 0);
constant IntPatternC : std_logic_vector((FrmBits(C_AdcBits)/2)-1 downto 0) :=
IntPatternBitSwapped(FrmBits(C_AdcBits)-1 downto FrmBits(C_AdcBits)/2);
constant IntPatternD : std_logic_vector((FrmBits(C_AdcBits)/2)-1 downto 0) :=
IntPatternBitSwapped((FrmBits(C_AdcBits)/2)-1 downto 0);
The intPatternA, intPatternB, intPatternC and intPatternD are used as a trainning pattern for the frameclock. As I think, the training pattern should be C_FrmPattern(C_FrmPattern is "11110000" when adcbits is 16 and the wire is 2). Why do you use intPatternA to intPatternD as the training pattern?
The AdcFrame.vhd is attached.

Question about LakeShore 325 Temp.Controller

Similar Messages

Maybe you are looking for