Hello again . I think there is a problem with my bit file. Smart serial does not work. I look at the TX-pin output with an oscilloscope. Only one pulse is sent when LinuxCNC is started. I also have a 7i76e with the same setup, I see a few pulses when starting linux.
I have two 7i98 cards and the problem is not in the PCB. Can anyone help? What's wrong with the bit file? In a p3 connector, all pins have IOPortTag & x"00" & NullTag & NullPin,
I spend several days in tests. Now I look at the oscilloscope what it shows on the 7i98 board (my board is not connected). if the jumper is set pull-down low voltage - the voltage is low and when linuxcnc starts , it goes one pulse high (as shown in the picture) and goes back to 0 and stays there. if the jumper is set pull-up high level - the voltage is high and when linuxcnc start it goes one pulse low and goes back to 3.3v and stays there. Where could be the problem?
At 7i76e I have a series of pulses.
Thanks!
Not sure, the one pulse just looks like the driver enabling the output to send data
but nothing is sent (the interface should send a 0xDF and a CRC character and wait for a response)
Thanks for the reply! I can't fix the problem. I put in a new bit file that uses the p2 connector for tx pin . I look at the signal on the oscilloscope and a series of pulses is visible. After turning linuxcnc on and off several times, only one pulse is visible again. I formatted the disk and installed debian again. On the oscilloscope I could see the series of pulses but I had no connection with the 7i73, now I have only one pulse again. I use this controller : max3490csa
is there a command to run again and again trying to connect with 7i73
Could it be a problem that I don't have a pin TXEn0 ?
