sjukheter

Hi, I have some silly doubt regarding event structure. When ever I taken event structure it display some parameters inside the event structure. what does all mean Type, time, newval, oldval and ctlref. Can any one explaine me the meaning of those parameters. More empty event structure contains only type and time parameters inside it.

Hi, I am facing these problem from last one month and still i can not solve it. I looking for big help. First problem ----------------- I want to make a search function that will send all the address to serial device and reply with avalible addresses. My address consists of 7 bits which may be lies in between 0 t0 127. So, I need to send these all address one bye one and wait for reply of each address weather it is available or not. If so. then display the available address in dropdown list(PMBus address). I have a idea that take a for loop and impleting this. Second problem ---------------------- After displaying all the available addresses in drop down list. User can select any of the address(that means he is writing to particular device) and able to send commands to the particular device. So, if he select the paricular address(like 10 or 22) then I want write reaming commands to that device. Third problem ------------------------- I have write(under regulated checkbox in my code) and read(under tab control) commands to serial device. Reading always should to run to get the values. Writing must be done when user enters the value in control and after clicking the send button. At the moment i am writing whole command at a time like 1088(10 representing address and 88 representing command). I don't know how to write these many thing always to one write visa. Please, some one help me with the provided code below and I am using labview 8.5 Thank you. newvi.vi

Hi, I want append a floating point value to hex string in hex format and write it to the serial port. i was trying with type cast getting strucked with errors. How can I append like 23.3(which user writing in control) to a command code 88(in hex) in hex format. Can any one help me.

thank you so much for for your help but i am very new to labview and its not good for me to enter into new coding design waht you have given. Even the dead line is coming vesry soon for me to submit these project. so, i would like to stick to my code which is easy to understand for me and like to implement towards the final solution. Can you tell me how can i do this. I have six monitoring commands which should always run continuously to get the answers. More I have 8 control commands(in event structure) which always user can set the values into them and written to the port parallel(like user enter some value in any of the 8 controls and press send button) and while writing these values to the port I want to append the user values to the existing command in hex (So far I have done it) but strucked with writing to serial device. I want to make a simple terminal instead of these controls and indicators to user can enter the command in write command box and he can see the result in read display box. Now read display box display the result of running command which I don't want and need to used same property in case of simple terminal creation. Errors are always hitting me when try to put write control to the write visa. Please can any one help me? newvi.vi

I want to make a drop down list(which especilly for indicating numbers) but i saw only string drop down list in options. How can i make that?

I had taken the event structure for each control which are used to write the values to serial device. Problem is when i am reading data from serial device i am using same command and when writing to serial device u just want to appened user value to the existing read command and send it to serial port only on user entered sistuation. Otherwise the old command should run always for read values and only i need to send write commands when the user enter specific value in specific control. More i want do also create send button that when user press the button after entering the values into controls(which are in event structure) then it should write those commands to serial port anr clear button to clear all the indicators and controls to zero. Please can any one tell me how i can do this.its urgent for me,...please Using labview8.5 newvi.vi

I know how to create local variables but i am very new to labview and i don't know exactly how to make this operation. In my code i just have 8 numeric indicators under tabcontrol. first i will send command from write visa to port which will get a value and displayed in indicator but at the same time I want to provide user to enter his own value and sent it to port with respective command. Can any one give example for one of my indicator then i will come to know, how i can goahead. using lv8.5. Thank you. newvi.vi

i am using usb connectionfrom PC to my controller and controller converts usb to i2c which connected over PMBus to smps.

hi, i am using basic serial read write for communicating with my device and i created some numeric indicators for displaying the values. I want to write to a value from indicator to serial port but indicators can only display the result. How i can do both write and read things from indicators. Please some one help me.

No, but you can see the attchment for whole command structure and command codes(see page 15 , 16 ,55,56 and last pages have all the comand codes in table). My doubt is if i taken start bit as1 one stop bit as 0 then is there any problem in sending lot commands with these bits. In between the start and stop bits i have to send original packet which have hex byte(command code) and address byte. can any one tell me which bits are better to take as start and stop because i think 1 and zero will create problems. More some times i need send REPEATED START BIT, how can i choose this bit. At last i need to send whole packet as in hex how i can send hex then start and stop bits will change some other..fully confused can any one explaine me... PMBus_Specification_Part_II_Rev_1-1_20070205.pdf

Hi, I just want to write a packet to the serial port in hex format . Right now i am writing only command code(88) which is in hex but now i want extend this command to following format (see Pic). Now i need to write command in the given manner . Some one help me how i can do like that. I need to write in hex format but for first bit S, how can i write in hex. Please some one can give me any example. the red circle contains real packet structure used by some other people. the same in i am doing in labview.

Hi, i my app i need to make a command line window for more user friendly interaction. now i am using basic serial read write for commanding and reading answers but also making command line window is a part of my application but i dont know how i gonna i make that, from the command line just i will write commands and see the reply there it self. I am sending some 13 commands from write visa always and showing the results on indicators but if user read some specific command now he can enter the command on command line window and he wiil be adle read the corresponding value back. Hope some one will help me..

no i did not read any book but i saw some beginer materials and video's on ni website and also everytime watching forums and learning new stuff..

thanks for your quick reply and i read the article and i saw many examples on ni forums also but as far as my notice that write visa only takes string format even though if you use typecast or array to string converters etc.. at last it will take in string only. This is same as what applied to read block also. Some people saw this message and they may feel about my basic level questions but indeed i need to know all the thing. Second question implies with numeric indicators that i know that i can read data by writing commands into and get the data and i will display in indicators but how i can do like if user enter any value in the indicator then in background the command will take that value and write to port again and also i notices while if any number displayed in numeric indicators will not erased by backspace when the vi is running . I fully messed with these problems and day by day i am wasting lot of time. Can any one help me ..?

My instructor said, we are not at all using string communication added to this like hex communication is better . I know in labview only string can write and read also performed in string formet but how i can send hex commands to port and as well it send only hex not strings. Can you explaine how we can acheive this...thankj you...

yes, you can find the attachment and right now i am just sending five commands especially for five monitor indicators which i have described above and under check box you can find writeand read indicators. i want do this operations continously and get the data and set data alltime. another.vi

i am doing one application in which user will handle the SMPS by labview. So far in the gui i have taken 13 numeric indicators to display the current parameters(temperature, voltage, current and power etc.) in the SMPS and in the 13 indicators five are only monitor indicators means which always display the current values and no interaction of user on that five(only observation). Those five indicators display the result by sending commands from write visa block everytime. Coming to the remining numeric indicators(8) user can write the new values in the indicators which will taken by write visa and then writen to the SMPS. First doubt: --------------- Is it right for taking numeric indicators for wrting directly from textboxes. Is that possible? if no how can write values from that indicators. indicators means it will only for display purpose. Second doubt ---------------------- In that 8 numeric indicators are build under checkbox which display 6 when it is unchecked and 2 in ither case. So, i want to make a program that if user can write the values in the textboxes and which can be taken and written to the serial port by write visa block. can any one give me suggestions about how i can continue to that? I am using basic serial write read example for usb communication and using labview 8.5. hoping for help.

No, what you said is not correct, because i have tried with sequence structure to send multiple commands but its not working fine. In my case i want to send one packet then it will reply back with answer then i need to display that in numeric boxes. But i was strucked with doing this. In squence structure, it sending all the command at a time and replying answers all but its wrong way for me. can any one help me to send sequencially one command and getting back answer and again sending second command etc like that. Please help me any one. Today i figure out one more problem that i need to use only hex coomunication with the device. As i notice that, i changed setting in write visa to hex, eventhough i thaought it was string communication. can any one help me in that i want send only hex and receive hex no more strings. Please help me. Basically i confused between these string and hex communication, can any teach me...??? Thank you,

Hi, i am using serial program to make a GUI in labview. in that, I want make some 5 packets to get the data from slave side. all the packets are transimitted from labview (WRITE vi) continuous one by one and data shoud read by READ VI and the read data should tap to five numeric textboxes everytime. I Have two doubts to do that, one that attached file contains packet model and related parameters. So, can any help me to design some example 5 packets and do the required thing. each packet should always transmit sequencially or at a time but the response should tap to five numeric text indicators. Please help me out. Related data.doc

HI, In my application, i going to write a command code(in hex) in VISA write block. After that i progrramed in my microcontroller that having list of commands and answers respective to the command. So, now i am unable to read exact value for written command code. Always i am getting default case value which i have written in the program. I attached code in microcontroller(you can find all the cases at last and macros on first of the programm ) as well as my VI. IT's very urgent for me to clear this fault. Can any one please help me. rajvi.vi cdcmine.txt

Hi, I want send the number what the user can enter in the given numeric textbox. Each numeric textbox having one command code in hex(example Frequency-0x95). So, if the user enter any value then command will take the value to the SMPS on Slave side, there it will match the code in that and it set the value to SMPS. IF user enter any of the given text boxes and he pressed send button then it has to send the entered values as well if the user click erase then textboes should clear automaticlly. Find the attchment below. Need big help from you, Please help me. rajvi.vi

I did not understand anything because i am new to this environment. can you make it for me then i will learn...

Hi, Please any one give me idea for making the operation. The attached VI shows the check box(regulated) in front panel with some text boxes below. So, now i want to make when the check box is clicked(on or regulated) i want to display last two text boxes with front labels and when it unchecked(off or unregulated) i want display first six text boxes with front labels. So, when the user try to enter alphabets in that textboxes it should not take those and give error message like only numbers are allowed. Attachment is there and please any one can make that for me. i am really new these lab view and looking for big help . please help me i waste 3 days for this and i did not find any way. Looking for big help. Basic_Serial_Write_and_Read.vi

thank you somuch to shanun....you are the god of day...