Parport read and write problem
16 Oct 2013 17:14 #39947
by ztj_1
Parport read and write problem was created by ztj_1
I want use the HAL component parport to (just read/write data) communication with my sigle-chip board.
Does it possible for me to do it without modify the sorce code?
Does it possible for me to do it without modify the sorce code?
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16 Oct 2013 18:40 #39952
by andypugh
Do you want to write "data" or set individual pins?
The hal_parport module is intended for setting and reading the values of individual pins. I suspect that you want to send data bytes, and the hal_parport component is probably quite a bad choice for that.
What is the data protocol to your board?
Replied by andypugh on topic Parport read and write problem
I want use the HAL component parport to (just read/write data) communication with my sigle-chip board.
Does it possible for me to do it without modify the sorce code?
Do you want to write "data" or set individual pins?
The hal_parport module is intended for setting and reading the values of individual pins. I suspect that you want to send data bytes, and the hal_parport component is probably quite a bad choice for that.
What is the data protocol to your board?
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16 Oct 2013 18:41 #39953
by ArcEye
Replied by ArcEye on topic Parport read and write problem
This is what it does, does that meet your needs?
www.linuxcnc.org/docs/devel/html/hal/parallel_port.html
If not you will have to write your own driver to send and receive data packets, or whatever it is you want to do.
regards
www.linuxcnc.org/docs/devel/html/hal/parallel_port.html
If not you will have to write your own driver to send and receive data packets, or whatever it is you want to do.
regards
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16 Oct 2013 18:58 #39955
by ztj_1
Replied by ztj_1 on topic Parport read and write problem
Thank you for your help,
As I asked in the previous question in
www.linuxcnc.org/index.php/english/forum...nuxcnc-on-preempt-rt
Now I'm trying to use rtai kernel, and I have already installed linuxcnc in the kernel 2.6.37+rtai39.
But now, I want use parallel port to do the close loop control for servo motor, so I need to read the feed back data.
As I asked in the previous question in
www.linuxcnc.org/index.php/english/forum...nuxcnc-on-preempt-rt
Now I'm trying to use rtai kernel, and I have already installed linuxcnc in the kernel 2.6.37+rtai39.
But now, I want use parallel port to do the close loop control for servo motor, so I need to read the feed back data.
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16 Oct 2013 19:16 #39960
by andypugh
Have you seen emergent.unpythonic.net/projects/01142347802
The config files are included with LinuxCNC as a sample config, called "etch-servo"
Replied by andypugh on topic Parport read and write problem
But now, I want use parallel port to do the close loop control for servo motor, so I need to read the feed back data.
Have you seen emergent.unpythonic.net/projects/01142347802
The config files are included with LinuxCNC as a sample config, called "etch-servo"
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