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Thread: DSATX brainstem connectivity issue

  1. #11
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    _Dejan_'s Avatar
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    Hi,
    I think that for brainstem you must use power too, because from PC do not receive enought power(RS232 version)... You can try(put it on cables and see if will work)...

  2. #12
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    Let me try tonight.

    BTW, do you have any clue on why i can't get any diagnostic data, while i checked the feed feature has been turned on (by looking at G14=1, meaning it has been turned on)?

    And how is the FTDI cable? do you have any issues on booting up the computer with the ACC signal? I am thinking if i should buy it.

  3. #13
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    Quote Originally Posted by mcpc View Post
    Let me try tonight.

    BTW, do you have any clue on why i can't get any diagnostic data, while i checked the feed feature has been turned on (by looking at G14=1, meaning it has been turned on)?

    And how is the FTDI cable? do you have any issues on booting up the computer with the ACC signal? I am thinking if i should buy it.
    As Im say I can nomrmaly boot/sleep/turn off pc no mather when I connect it to DSATX(Turned PC of or on) also I can turn on/off pc no mather if I have opened diagnostic or not.
    I turn PC on/off only with Ignition signal +12V and GND is allways connected. It boot everytime and Im not have any problem that pc will not boot...

    Did you try press F (Case sensitive)? If you don't receive any data then your brainstem do not work or is not connected right(you are turn it wrong for 180)...

  4. #14
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    The brainstem is connected right, and can change the settings or query on parameters. The problem is after i enabled the diagnostic feed, i got no diagnostic data.

  5. #15
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    If you set a variable with a different number, query it, and it works, I doubt there's a connection issue.

    Did you feed acc power to it as I pointed above? If the DSATX thinks the ignition is off, it will stop the feed regardless of settings. That's the only think I can think off.

  6. #16
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    I eventually found a way to solve the brainstem issue. I can now use the serial brainstem with a serial-usb adapter without any annoying bugs.
    The braintem unstable issue (e.g. counldnt boot sometimes, no diagnostic data output) is due to the serial brainstem gets the 5v power from the dsatx J2 port, which somehow make the dsattx unstable.

    The resolution is to connect only the TX and RX wires of the brainstem to the dsatx J2, meanwhile connects the 5v and ground wires to the harddisk power cable (I.e. the 4 pins power cable connecting the psu to the harddisk or cdrom), such that the brainstem will not get the power directly from the dsatx J2 port.

    By doing this, the brainstem works when it can get the power from dsatx through the power cable, and I can us the brainstem for configuration and real time monitoring. Hibernate upon ignition works just perfect now.

  7. #17
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    Quote Originally Posted by mcpc View Post
    I eventually found a way to solve the brainstem issue. I can now use the serial brainstem with a serial-usb adapter without any annoying bugs.
    The braintem unstable issue (e.g. counldnt boot sometimes, no diagnostic data output) is due to the serial brainstem gets the 5v power from the dsatx J2 port, which somehow make the dsattx unstable.

    The resolution is to connect only the TX and RX wires of the brainstem to the dsatx J2, meanwhile connects the 5v and ground wires to the harddisk power cable (I.e. the 4 pins power cable connecting the psu to the harddisk or cdrom), such that the brainstem will not get the power directly from the dsatx J2 port.

    By doing this, the brainstem works when it can get the power from dsatx through the power cable, and I can us the brainstem for configuration and real time monitoring. Hibernate upon ignition works just perfect now.
    Great.
    What happen if you connect GND wire too? In your case is not problem if you don't connect it because you are using it on same computer...

  8. #18
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    Quote Originally Posted by _Dejan_ View Post
    Great.
    What happen if you connect GND wire too? In your case is not problem if you don't connect it because you are using it on same computer...
    I believe the grd wire always needs to be connected to where you get power, pls correct me if I am wrong.

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