jew666

I didn't realize that all I needed was to send a "xmodem" serial string. Add a few second wait and then  use "VISA SEND VI" with my firmware file. 

 KISS

"Keep It Simple Stupid"

Thanks everyone

I got it !!!!!!

Thank you, to all those who helped. I was making it much more difficult than it really was.

I have sent out a "xmodem" in a string with carriage return. I am sniffing the transmit out of my UART. The UART transmit line then continuously sends a negative acknowledgement (NAK).

Am I on the right track?

I am nearly as confused as before.

 Is it safe to assume that I only need to initiate the send computer since my receive computer is a microcontroller?

I have sniffed the communication using UART to USB interfaces with Hyper-terminal.

I sniffed the file going out and the communication being sent back. I saved these in files.

When I started the transfer the receiving end transmission sent out a two uppercase "C"s and then 1451 Acknowledgements (Looking a file through Notepad++)

The last portion in the receiving file is a CAN (again viewed through Notepad++)

Where do I start with the x-modem vi libraries?  Do I Initiate receiving first or send or something else?

I will try that and get back to you.

"Put a man in the middle"?

Currently I send serially a collection of hex files that have been dubbed a “FW†file via HyperTerminal in Xmodem format to an embedded device. I would like to do this in LabVIEW. I am not familiar with where I should start.

I have used the Calculate XMODEM CRC-16 (File input).vi with my FW file.  The Calculate XMODEM CRC-16 (File input).vi appears to handle the FW file accurately. It calculates the length accurately. I don’t know where to start in order to send the file serially to the embedded device in a Xmodem format.