Subject:
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RE: RotateMotor is stuck/nxc
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Fri, 27 Jul 2007 12:06:46 GMT
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Viewed:
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21161 times
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Just to clarify more although it probably is very clear to most...
LEGS_TURNING_DEG = some int to indicate the turning degree
MOVENOW & DONE contains different integer values
--E
-----Original Message-----
From: news-gateway@lugnet.com [mailto:news-gateway@lugnet.com] On Behalf Of
Elizabeth Mabrey
Sent: Thursday, July 26, 2007 11:26 PM
To: lugnet.robotics.nxt@lugnet.com
Subject: RotateMotor is stuck/nxc
Symptom:
Stuck in RotateMotor function call.
================================
Synopsis of how to create the problem :
- 2 tasks
- Task1 handles motor A & C
- Task2 handles motor B
- Task1’s motor movements have to synchronize with the Task2’s motor B
movement
- Mutex is used.
================================
Code segment:
(Note: TORSO is motor B)
Task 2 :
ResetRotationCount(TORSO);
Leg = LEFT;
Acquire(FootMutex);
FootMove=MOVENOW;
Release(FootMutex);
TextOut(0, LCD_LINE2, false, "DO ROTATE"); ß- does display ok
RotateMotor (TORSO, 100, 360); ß---- stuck in this call
TextOut(0, LCD_LINE2, false, "DONE ROTATE"); ß does not display,
i.e. execution has been stuck at RotateMotor.
until (FootMove==DONE);
Task 1:
(Note: Leg will only be either motor A or C)
until (FootMove==MOVENOW);
RotateMotor (Leg, 75, LEGS_TURNING_DEG);
RotateMotor (Leg, -75, LEGS_TURNING_DEG);
Wait(1000);
Acquire(FootMutex);
FootMove=DONE;
Release(FootMutex);
TextOut(…., FootMove);ß- this shows up on the LCD fine. This tells
me that the mutex is indeed released.
So FootMove is also set to
DONE.
// note the FootMove is initialized to DONE before these tasks are invoked.
================================
How to further prove the it is hung in the RotateMotor call?
- Once I replace the RotateMotor with Wait(500); or Wait(250), etc.
The flow is fine.
--E
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Message has 1 Reply:
 | | Re: RotateMotor is stuck/nxc
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| (...) Elizabeth, Could you upgrade to b31 of NXC and see if you still have this problem? You will need to update your TextOut call to put the "false" as the last parameter or leave it out altogether. TextOut(0, LCD_LINE2, "DONE ROTATE"); Also, could (...) (17 years ago, 27-Jul-07, to lugnet.robotics.nxt)
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Message is in Reply To:
| | RotateMotor is stuck/nxc
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| Symptom: Stuck in RotateMotor function call. ===...=== Synopsis of how to create the problem : - 2 tasks - Task1 handles motor A & C - Task2 handles motor B - Task1’s motor movements have to synchronize with the Task2’s motor B movement - Mutex is (...) (17 years ago, 27-Jul-07, to lugnet.robotics.nxt)
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