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Thanks it worked... had to set 255 to 256 in order the keep the correct count sequence.

I am doing some serial communication and need to calculate a 8 bit (one byte) checksum by adding up a series of 10 bytes. I have been able to do it but when the checksum value goes over 255 is keeps counting up and ends up in a 16 bit value. I need the 8 bit value to roll over from FF and keep the c...

I have 2 bytes from a serial port that represent a 16 bit number. They arrive as highbyte and lowbyte of a 16 bit word. I need to convert the 2 bytes back into a 16 bit number so I can show it in a text field. Does anyone have an example on how to get the 2 received bytes back into a 16 bit number? ...

We have projects that require the use of PC serial and USB ports to support external device communication. The projects are for GUI diagnostic tools that support out line of motor controllers. We would like the developer to be local so physical testing and debugging of the end application can be don...

I added a note to pending bug report # 14612 about serial port read not working.
This bug report is related to this issue and it looks like it is still under review.
I should get an Email if someone responds or adds to the bug report.
Tom
Las Vegas
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I did some file read tests as in the code below. The read from a normal file works but reading from a com port file does not follow the read defines in the same way. The memory leak is only there on LC ver 7.04 and above when reading continuous serial data. I would sure like to get some input from a...

I am going to play with real file reads vs comm port file reads an see what I can find.
If I can get real files to read one char at a time, then I will report the problem.
I also want to see if the memory gain issue happens on real file reads like the comm port reads.
Thanks for your help.
Tom
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If I uncheck the search for required inclusions in the "stand alone app settings" My app saves without the rev speech dll in the stand alone application. If I ask the save to look for the external helper files, it adds the rev speech thingy to every one of my application standalone s. I have no idea...

I do use the beep command on a button that opens the serial port and starts the readport code that is posted here. When you use the beep in LC, the standalone app also adds the revspeech to the build and you have to remember to close it down when you exit the application. I use the "revUnloadSpeech"...

Thank you for the reply. Yes I am in a read loop where I read the com port for 1 until I get the start chr of "*"... Then I read in a loop to collect the serial packet of 50 characters or so until I get the end chr "#. Then I start over because the next packet will arrive in about 300 milliseconds. ...

Are there any LC coders in Las Vegas?

on readPort if the hilite of btn "Port open" = true then put the label of btn "Port" into thePort read from file thePort for 1 -- looking for * as first chr of packet. If it = "*" then --lock screen put empty into fld "recField" -- clear recField set the backgroundColor of button RX to "green" put ...

Same problem here on LC 7.0.4 thru 8.0 on Windows XP It happens in the Script Editor. Cut works but paste stops working and you have to restart LC to get it back working. It is a cut and never get your stuff back function... :cry: Don't know what is setting it off but is is a pain to have to restart...

This is the code in question. The memory usage keeps increasing as the app runs. It works the same on 7.0 through 8.0 I have tried several parse methods that all work. The leak seems to be coming from the read file for 1 part of the code. The serial packet begins with a * and ends with a #. on readP...

I am receiving a 40 byte serial packet at 9600 baud into my live code app every second. I have used 5.5.3 through 7.1 and have observed what looks like a memory leak when the application is running and receiving serial data. The same memory increase happens in development mode and in my stand alone ...