Hi Max,
thas is great news.
If you send the patch as a reply to this list, I will make sure it gets put
in (I borked it up in the first place, so it seems only fair).
Regards,
Alex
>
> Hello Chris,
>
> thanks a lot for your reply. Your last comment about the message that
> the driver should print on loading led me to the right place to go bug
> hunting. Now it works.
>
> If you look at src/hal/driver/hal_stg.c and the loadrt line with which i
> loaded hal_stg:
>
> <cut>
> static int stg_init_card()
> {
>
> if (base == 0x00) {
> base = stg_autodetect();
> }
>
> if (model != 0) {
> stg_driver->model = model; //overrides any detected model, use
> with caution
> }
>
> if (base == 0x00) {
> rtapi_print_msg(RTAPI_MSG_ERR, "STG: ERROR: no STG or STG2 card
> found\n");
> return -ENODEV;
> }
> </cut>
>
> And:
> loadrt hal_stg base=0x200 num_chan=4 dio="IIOO"
>
> Then it is obvious that if the base address is set on loading, but the
> model of the card (1 or 2) is not, then stg_driver->model will not be
> set in stg_autodetect() or in stg_init_card() itself.
> The stg card will then work in general, the encoders will count, DI and
> DO works, but the index pulse will not work.
>
> To whom do i submit a patch ? I also made some other enhancements (index
> polarity settable via hal, debug improvements ).
>
> Cheers
> Max
>
>> On Mon, Oct 13, 2008 at 12:35:56AM +0200, Maximilian wrote:
>>> I did connect the (undocumented) hal stg.X.index-enable pin to the
>>> axis.X.index-enable pin for all axes. And then I can see the different
>>> Xindex, Yindex, etc signals being driven high for the respective axis
>>> when homing starts. But the stg driver never puts them back to low again
>>> to indicate that the index pulse has been found.
>>> I also put HOME_USE_INDEX = YES, HOME_LATCH_VEL = -5.0 in the ini.
>>
>> First, thanks for your excellent account of what you've done and
>> what you see. What version of EMC2 are you testing with?
>>
>> Homing should put the index enables high when the index search starts,
>> not when homing starts (unless you are using index-only homing).
>>
>> I see from the log that Alex added STG1 (but not STG2) index support
>> in Jan 2007 so all 2.2.x versions of EMC2 will have this code. In
>> distant memory I think I remember a report that it worked - was it
>> Matt Shaver maybe? Alex's log message says he did not have the
>> hardware to test it.
>>
>> Also from distant memory I recall that the STG1 could not reliably do
>> an index search on more than one encoder at a time. So you will not
>> be able to safely home axes simultaneously.
>>
>> Do you get the message "STG: found version 1 card at address %x\n"
>> when the driver loads?
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