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Motion control Module
2015 年 01 月 09 日
23:57:05
bcrepet
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Forum Posts: 1
Member Since:
2015 年 01 月 09 日
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Hello,

I bought a 86duino one in order to control at the same time 7 stepper motors powered by a driver on which I need to input up to 25kHz pulse.
To outut these pulse signals with the 86duino, my idea was to use the accelstepper library. (http://www.airspayce.com/mikem.....elStepper/)
I choosed a 86duino because I thought that it would be fast enough to generate the signals and make the required calculations at the same time.
However, when I tested the board and compared with another and less powerfull 32 bit 80MHz arduino-like board I have (CHIPKIT MAX32), I noticed the following:

-86duino is not fully compatible with Accelstepper . Some functions are not compiled.Confused But it is still possible to run some motors.
-With the 86duino, the 25 khz signal cannot be reached. It is far from beeing reached, even with only one motor.Cry
-With the other board, it works ok for one motor, not more. With more than one motor the max pulse frequency is divided with the number of motors.
-For the calculations (that use floating points), 86duino works very well and is about 20 times faster than the other board, which is great!.Laugh

I am not an expert but it would bet the accelstepper library is not optimised for the 86duino's hardware.
However I learned on this post:
http://www.86duino.com/?page_i.....r-directly
and here:
http://www.86duino.com/?p=6420
, that a "thing" called Motion Control Module exists on the chip that would, according to what I read on the powerpoint document, widely fullfill my requirements (12 axis, 25MHz pulse frequency).Laugh

On the powerpoint documents, It is mentioned that librairies exist to make the module work. Would a library for stepper motors exist?
As suggested, I wrote to soc@dmp.com.tw, to get the MCM datasheet some days ago but to now I got no answer.

Would somebody here have more informations about that and could help?

Thanks in advance,

bcrepet.

2015 年 01 月 13 日
21:52:33
cucubutter
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Forum Posts: 84
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2014 年 04 月 10 日
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Hi, bcrepet,
I downloaded the AccelStepper library (1.45) from http://www.airspayce.com/mikem.....celStepper and added it to 86Duino IDE. Before using IDE Coding 207 to compile it, i removed the AccelStepper.cpp and AccelStepper.h in the Adafruit_Motor_Shield library and then compile pass.:)
The most examples can be compiled pass except "MotorShield". In MotorShield example, the _BV() is called, you need to add "#include avr/pgmspace.h" line to compile.
hope to help you.

cucubutter

2015 年 01 月 27 日
20:58:15
Android_Lin
Moderator
Forum Posts: 228
Member Since:
2014 年 04 月 01 日
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Hi, bcrepet,
The AccelStepper.cpp and AccelStepper.h in the Adafruit_Motor_Shield library are unnecessary for 86Duino Coding 207. You first need to remove them and then can compile pass now. We will remove them in Coding 208. Thank you.

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