Need help with serial communication

[pmishu20]

I`m working on an embedded project that implies an external device equiped with microcontroller to communicate via rs-232 with a pc application. I`ve written the pc application in .net C# that receives data using the serial port object provided by .net framework. If I don`t put a delay after the transmit USART function in the embedded device the .net application loose data. If a put a delay the application works fine.
Time is critical for my project. Can anyone please tell me how can I fix this problem ?

[Cletus Wilbury]

I`m working on an embedded project that implies an external device equiped with microcontroller to communicate via rs-232 with a pc application. I`ve written the pc application in .net C# that receives data using the serial port object provided by .net framework. If I don`t put a delay after the transmit USART function in the embedded device the .net application loose data. If a put a delay the application works fine.
Time is critical for my project. Can anyone please tell me how can I fix this problem ?

I've worked on similar problems, and it helps if you can analyze the timing carefully.
If you need to look at the data coming across with precise time stamping, my friend has designed a useful device just for that purpose.

EZ-Tap

Comes with Windows software to read/store/display data the device sends out on USB port.

EZ-Tap forum

I just set up that forum, first time I've ever done it, seems to work?

[Plater]

Firstly, if you are using a USB->Serial converter, there is really not anything you can do, the lag is due to the conversion between serial and usb (and back) withen the drivers/hardware for the device.

If you're using a hardware uart on the pc side (built in serial port), check how you do the reads. (Don't do them only in the DataReceived event because you will miss some events and fall behind)