Why cannot I use Timer0 interrupt in lab03b ?

chao,

lab03b is using timer 0 and timer 1 for the FEM and CPU_USAGE modules.  Try using any of the other labs for your LED using timer0.

 

Thank you Chris for the reply. But I used Timer0 interrupt  according to <motorware_hal_tutorial> in lab06a,get a same error message.

when I run some others whitout Timer0 interrupt,  all goes well.

which lab can use Timer0 interrupt?

Is these any other conditions for using Timer0 interrupt ?

CCS: 5.5

compiler: 6.2.6

motorware: 13

proj 3b and 7 are using timer0 for the frequency of execution module example.

You can use timer0 in any of the other labs as-is.

 

Your error doesn't look like an issue with the timer0, or something is set up incorrectly.

 

Hello Chris 

I have solved the problem by re-installing ccs and motorware.but  I was faced with a new problem.

In lab03a, I can use the potentiometer to control speed of motor well.

But, I do likewise in lab06a.The motor do not run.I think my parameters of use.h for instaSPINmotion are no problems,because I remove code about potentiometer and use ccs to set gMotorVars.SpeedRef_krpm and the motor run well. So I do not know why...

I suppose your potentiometer is providing a value from -1.0 to 1.0 (or something similar) in relation to a per unit value.

You are setting this equal to your SpeedRef_krpm, which expects a value in KRPM.

you need to take your pot value and turn it into krpm.

For example, you could have a maximum krpm for your motor hard coded or from a variable and then do something like

gMotorVars.SpeedRef_krpm = gPotentiometer * gMax_krpm;

I think it is not the case.The format of gPotentiometer and gMotorVars.SpeedRef_krpm is _iq. If  the maximum speed of my motor is 1000 rpm(gMax_krpm equals 1),then I think I can do this:gMotorVars.SpeedRef_krpm = gPotentiometer;

I did a test,I commented out the code about potentiometer and inserted the code"gMotorVars.SpeedRef_krpm = _IQ(0.5);".

It can run as intended and my motor spined well.But no mater how much potentiometer equal to,my motor has remained unmovable. 

So I haven't been able to find out the reason.

 

I  made some tests again. I found seemed to have a bug in lab06a if users use potentiometer to control the speed.

because when the motor goes  from a static position into a dynamic motion,you must ensure the value of gMotorVars.SpeedRef_krpm  make no changes! Any slight changes are not  allowed during this period.

For example:

I used test3 for counting. the code below can not make motor run :

Change test3.The code below can make motor run :

So,this test explains the phenomenon why I cannot use potentiometer to control motor.

The voltage of potentiometer  is not always conservative results at all.

Now,I cannot find a good solution.I'm sure I need help and instruction.

BTW:Can you give me a PCB file about TMDSCNCD28069MISO for Altium designer format ?

 

 

 

chao,

I don't understand what you are trying to show. Using a pot for a speed command can certainly be done, many on here have done so.

the controlCARD files are given only in the following

C:\ti\controlSUITE\development_kits\~controlCARDs\TMDSCNCD28069ISO_v1_1\R0_4

I believe it is done using a free program called Express PCB http://www.expresspcb.com/ 

 

Thanks for the reply.I think my statement is not clear.

Using a pot for a speed command cannot be done in lab06a.I’ve done this many times.So I am trying to show why a pot as a speed command to control motor is failure in lab06a.

First.when you tell me the reason that I am not setting this equal to my SpeedRef_krpm,so I made a test prove it is not the real reason.I made the value of the pot is 1.65V,it means gPotentiometer is approximately equal to _IQ(0.5).then I made gMotorVars.SpeedRef_krpm = gPotentiometer.But the motor cannot run.After that,I did not use the pot and I made gMotorVars.SpeedRef_krpm = _IQ(0.5).The motor can run.

Second.I try to find why the motor cannot run.I gave gMotorVars.SpeedRef_krpm two different values(_IQ(0.401001) and _IQ(0.401022)).If two assignment gaps were short,the motor cannot run.If two assignment gaps were long,the motor can run.It means the motor goes from a static position into a dynamic motion,you must ensure the value of gMotorVars.SpeedRef_krpm  make no changes! Any slight changes are not  allowed during this period.this test explains why I use potentiometer to control motor is failure.

During practical applications,the voltage of potentiometer is not always conservative results at all.So anyone 

uses potentiometer to control motor is failure in lab06a.So I need help how to use potentiometer to control motor in lab06a.

If Chris donnot see what I mean,you can do a test in lab06a.

 

Today, I found it is also ineffective that use potentiometer  to control motor in lab06b,but effective in lab2a~lab05b.

CCS:5.5

motorware:13

compiler:6.2.7

user.h:8308.user.h

 

hi chris,
i want to work with FEM and CPU_USAGE modules in proj_lab3b but a bit confused about it. where can i find a document or help about this lab or FEM and CPU_USAGE modules?
thank you.

Hi,

Unfortunately we have not written a document that describes these modules in detail. However, they simply use a timer to calculate the time that has elapsed, and then that information is used to calculate percentage of CPU usage. Do you have a specific question?

-Jorge