loadrt stepgen step_type

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17 Jul 2014 02:55 #48850 by isladelobos
Hi.

I'm testing one W axis Hal file with steppers but in

loadrt stepgen step_type=0,0,0,0,0,0,0,0,0

can't add more than eight.

In this case i'm configuring the W joint but can't add:

net cdir => parport.1.pin-05-out
net cstep => parport.1.pin-04-out
setp parport.1.pin-04-out-reset 1

setp stepgen.8.position-scale [AXIS_8]SCALE
setp stepgen.8.steplen 1
setp stepgen.8.stepspace 0
setp stepgen.8.dirhold 18200
setp stepgen.8.dirsetup 18200
setp stepgen.8.maxaccel [AXIS_8]STEPGEN_MAXACCEL
net wpos-cmd axis.8.motor-pos-cmd => stepgen.5.position-cmd
net wpos-fb stepgen.8.position-fb => axis.8.motor-pos-fb
net wstep <= stepgen.8.step
net wdir <= stepgen.8.dir


Any suggestions?
Regards.

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17 Jul 2014 07:18 #48854 by PCW
Replied by PCW on topic loadrt stepgen step_type
The stepgen component only supports creating 8 stepgens currently
so if you actually need more than 8 stepgens, you might have to modify
the stepgen component.

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17 Jul 2014 12:35 - 17 Jul 2014 13:39 #48863 by isladelobos
Ok.

I'm reading the new HAL manual, but modify this component is a bit difficult for me.

Only change the Max_chan and recompile?

I'm have the 2.4.3 release.
Last edit: 17 Jul 2014 13:39 by isladelobos.

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17 Jul 2014 15:59 #48866 by ArcEye
Replied by ArcEye on topic loadrt stepgen step_type
This has come up before and stepgen.c was altered to suit
If you use 2.6, it is already in it.

Only change the Max_chan and recompile?

I'm have the 2.4.3 release.


If you want to do it manually, this is a diff between the old and the new code
19c19
<     It supports up to 8 pulse generators.  Each generator can produce
---
>     It supports up to 16 pulse generators.  Each generator can produce
29,30c29,30
<     a comma separated (no spaces) list of up to 8 stepping types
<     to configure up to 8 channels.  A second command line parameter
---
>     a comma separated (no spaces) list of up to 16 stepping types
>     to configure up to 16 channels.  A second command line parameter
307,308c307,308
< #define MAX_CHAN 8
< #define MAX_CYCLE 10
---
> #define MAX_CHAN 16
> #define MAX_CYCLE 18
315,319c315,319
< int step_type[MAX_CHAN] = { -1, -1, -1, -1, -1, -1, -1, -1 };
< RTAPI_MP_ARRAY_INT(step_type,MAX_CHAN,"stepping types for up to 8 channels");
< const char *ctrl_type[MAX_CHAN];
< RTAPI_MP_ARRAY_STRING(ctrl_type,MAX_CHAN,"control type (pos or vel) for up to 8 channels");
< int user_step_type[MAX_CYCLE] = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
---
> int step_type[] = { [0 ... MAX_CHAN-1] = -1 } ;
> RTAPI_MP_ARRAY_INT(step_type,MAX_CHAN,"stepping types for up to 16 channels");
> char *ctrl_type[MAX_CHAN];
> RTAPI_MP_ARRAY_STRING(ctrl_type,MAX_CHAN,"control type (pos or vel) for up to 16 channels");
> int user_step_type[] = { [0 ... MAX_CYCLE-1] = -1 };

So you see you will have to alter a few other things too, but not much

regards

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17 Jul 2014 19:08 #48882 by PCW
Replied by PCW on topic loadrt stepgen step_type
Looks like the change to 16 channels was done at 2.5

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17 Jul 2014 19:20 #48885 by ArcEye
Replied by ArcEye on topic loadrt stepgen step_type

Looks like the change to 16 channels was done at 2.5


I thought it should have been, I remember JT patching it a while back after a similar request, but the copy of the 2.5.4 sources I have archived, still had the 8 channels, so I was going by that.
The following user(s) said Thank You: isladelobos

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18 Jul 2014 15:21 #48915 by isladelobos
Thanks masters.

That was very clarifier for my.
In the next couple of days go recompile or actualize to 2.6.

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