Dear Jan, Thank you for the time spent on my e-mail. We can switch to Czech, if you want to.
2. I built a slightly modified HW with USB converter FT2232D and 74HC4053 instead of LPT port. The circuit comes out from your version of USB converter on your webpage
). The printed circuit board is also modified for this circuit, so that both logic analyzer and USB interface are on one double sided printed circuit board. I got this schematic and board from user "WASHU" from svetelektro.com
webpage. This version was tested by several builders and was proven to be OK.
3. Now, I cannot test the communication via LPT port, as long as it is missing on this modified PCB.
4. If I do not set the trigger event, the analyzer does the same. Data is not captured and all three LEDs blink only for a short moment.
As I have already written, the communication with PC is probably OK, as long as your SW minila.exe reads the firmware version correctly.
I have one question, how does the hardware unit inform the PC that the trigger event has come and the sampling was finished?
I am afraid that something wrong happened to CPLD. I have one more piece for replacement.