how to get the data from control.c

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09 Jul 2014 21:36 #48583 by tiffany
really really thank for your help!
I have get the data by build some new pins in halui.cc;
I will paste the codes, hope helpful for others.
usr_intr/halui.cc
ARRAY(hal_float_t,joint_pos_commanded,EMCMOT_MAX_JOINTS+1) /* status pin for commanded joint position */ \
    ARRAY(hal_float_t,joint_vel_commanded,EMCMOT_MAX_JOINTS+1) /* status pin for commanded joint vel*/ \
...........
    for (joint=0; joint < EMCMOT_MAX_JOINTS ; joint++) {
  retval =  hal_pin_float_newf(HAL_IN, &(halui_data->joint_pos_commanded[joint]), comp_id, "halui.joint.%d.pos-commanded", joint);
    if (retval < 0) return retval;
  retval =  hal_pin_float_newf(HAL_IN, &(halui_data->joint_vel_commanded[joint]), comp_id, "halui.joint.%d.vel-commanded", joint);
    if (retval < 0) return retval;
    }
............
	joint_pos_cmd=*(halui_data->joint_pos_commanded[joint_num]);
	joint_vel_cmd=*(halui_data->joint_vel_commanded[joint_num]);

	generate_formatted_data_float(szdata, joint_num, joint_pos_cmd, joint_vel_cmd);
	send_data(szdata);

halgui:
loadusr -W 6husgui
#must run this from the same directory for now
loadusr -W halui -ini 6hus.ini

net Xpos halui.joint.0.pos-commanded
net Ypos halui.joint.1.pos-commanded
net Zpos halui.joint.2.pos-commanded
net Apos halui.joint.3.pos-commanded
net Bpos halui.joint.4.pos-commanded
net Cpos halui.joint.5.pos-commanded

net Xvel halui.joint.0.vel-commanded
net Yvel halui.joint.1.vel-commanded
net Zvel halui.joint.2.vel-commanded
net Avel halui.joint.3.vel-commanded
net Bvel halui.joint.4.vel-commanded
net Cvel halui.joint.5.vel-commanded

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09 Jul 2014 22:23 #48585 by ArcEye
Hi

Yes that will do it, you seem to have what you wanted.

The only caution about your approach is that it commits you to support a patched version of linuxcnc 'ad infinitum', because these changes are unlikely to be adopted.

If you can develop a modular approach once you have everything working as you want, you will save yourself a lot of future work, in that you will just need to support your own component

regards

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