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Robertz
Joined: 23 Mar 2010
Posts: 2
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| Problem with Motor Pwm Module commands on PCWHD V.4.104 |
 Posted: Tue Mar 23, 2010 6:20 pm |
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Hi,
I have made a project with a dsPIC33FJ128MC202, and I can't use the motor pwm modules commands. My version is PCWHD 4.104.
And the compiler gave my the following errors:
| Quote: |
Error 12 - Unknown identifier --setup_motor_pwm
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This is the line 12:
| Code: |
setup_motor_pwm(1,MPWM_FREE_RUN | MPWM_SYNC_OVERRIDES, timebase);
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Why? Thank you. |
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robomaniac
Joined: 16 Jul 2009
Posts: 19
Location: Sherbrooke, Québec, Canada
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| Posted: Tue Mar 23, 2010 7:52 pm |
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People on this forum will ask, send the complete code.
Unknown identifier means it does not understand something. That thing can be 1 or more then one parameter.
open 33FJ128MC202.H file
MPWM_FREE_RUN and MPWM_SYNC_OVERRIDES are not in the .H file
Also timebase is not define, you wrote timebase and not a number
| Code: |
setup_motor_pwm(pwm,options, timebase);
setup_motor_pwm(pwm,options,prescale,postscale,timebase)
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Also look at line 152 of 33FJ128MC202.H file.
It tells you what SET_PWM_DUTY takes as parameter.
_________________
Jérôme Demers
www.jeromedemers.com |
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Robertz
Joined: 23 Mar 2010
Posts: 2
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| Posted: Wed Mar 24, 2010 5:03 am |
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Yes, but substituting identifiers with numbers, the problem will occour because (i think) the problem is " setup_motor_pwm " function and not the parameters.
For example, I have tried to write "delay_ms(pluto);" and the compiler error is: "Error 12 - Unknown identifier pluto" and not delay_ms.
I think that the compiler for this pic do not recognize the function "setup_motor_pwm". |
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idjanos
Joined: 31 Mar 2010
Posts: 1
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| Posted: Wed Mar 31, 2010 3:18 pm |
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You must initialize the PWM timebase.
| Code: |
#int_PWM1 //it works with dsPIC30F2010 but you sould look at the .h file
void main(){
enable_interrupts(INT_PWM1);
setup_motor_pwm(1,MPWM_FREE_RUN|MPWM_INDEPENDENT,1,1,100);
set_motor_unit(1,1,MPWM_FORCE_L_0,0,0);
set_motor_pwm_duty(1,1,255-i);
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It works, but I have a problem: it works just in complementary mode. |
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