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megabytron
Joined: 05 Nov 2010
Posts: 6
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| About dspic33FJ128MC802 |
 Posted: Fri Nov 05, 2010 2:26 pm |
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Hello,
I'm starting with the dspic33FJ128MC802 but I can't use the PWM  with this chip, I'm lost with this, I dont know if the 33FJ128MC802.h is complete or not?
Has anyone worked or is working with this chip?
Best regards,
Diego. |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Fri Nov 05, 2010 2:50 pm |
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| I don't use dsPIC33, but I noticed, that CCS provides a number of xxx_motor_pwm() built in functions for the MC (motor control) types. Did you check, if the functions are working for you? |
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megabytron
Joined: 05 Nov 2010
Posts: 6
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| Posted: Fri Nov 05, 2010 2:57 pm |
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That's the problem, I think for this I can use the setup_motor_pwm(), but this instruction is an "Undefined Identifier" when I compile, so I don't know how can I fix this?
Thanks FvM,
Diego. |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Fri Nov 05, 2010 4:45 pm |
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| I see, that setup_motor_pwm() compiles with PCD V4.112. What's your PCD version, how you are using the function? |
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megabytron
Joined: 05 Nov 2010
Posts: 6
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| Posted: Fri Nov 05, 2010 4:56 pm |
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My version is 4.088,
Now I'm trying with set_compare_time:
| Code: |
int16 OCR_2 = 0x1000;
int16 OCRS_2 = 0x5C4B;
set_compare_time(2, OCR_2, OCRS_2);
setup_compare(2, COMPARE_SINGLE_PULSE | COMPARE_TIMER3);
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But I have 2 errors:
Invalid Parameters to built in function :: Invalid Pin
Invalid Parameters to built in function :: Invalid Pin
I don't understand why :S
Thx |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Fri Nov 05, 2010 5:46 pm |
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| Quote: | | My version is 4.088 |
That's a helpless case. The motor_pwm functions aren't supported before some 4.1xx PCD version. There are also other serious bugs involved with those early releases. Although some have been continued until today, 4.088 is definitely much worse. But it's working, though.
So the only option is to code the PWM register accesses yourself. |
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megabytron
Joined: 05 Nov 2010
Posts: 6
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| Posted: Fri Nov 05, 2010 8:41 pm |
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Mr. FvM, you are right!
Now I compile in version 4.110, and is working!
my code is this:
| Code: | setup_motor_pwm(1,MPWM_FREE_RUN | MPWM_SYNC_OVERRIDES, 50000);
set_motor_unit( 1,MPWM_ENABLE , MPWM_FORCE_L_1,MPWM_FAULT_NO_CHANGE,0);
set_motor_pwm_duty(1,0,0x55); //What is the effect of 0x55?
set_motor_pwm_event(1,10000); //What is the effect of 10000? |
and also use the #int_PWM1 and I can change the brightness of the LED but some one can explain me those functions? in the reference manual is not clear (for me).
For Example in setup_motor_pwm(pwm,options,prescale,postscale,timebase)
Pwm- Defines the pwm module used. --> Ok I used # 1
Options- The mode of the power PWM module. See the devices .h file for
all options --> Why MPWM_FREE_RUN | MPWM_SYNC_OVERRIDES ?
timebase- This parameter sets up the PWM time base pre-scale and post-scale. --> Why 50000?
If someone can explain this functions I'll appreciate it.
Best regards,
Diego P. |
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wangine
Joined: 07 Jul 2009
Posts: 98
Location: Curtea de Arges, Romania
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| Posted: Fri Jun 17, 2011 4:17 pm |
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I have the same problem but with another processor. dsPIC33FJ64GS406.
I just need two modules in PWM mode independently.
I tried microcontroller in C30 compiler and it works.
The problem is that I do not want to use it in C30 and CCS has a lot of features made in the compiler and besides it is also easier to use.
How can I set the PWM in CCS compiler? I hate C30.
For other microcontrollers 18F, 24F works but not on it.
Compiler version is 4.120.
Any function PWM motor control were to have compilation error.
There are built in functions and should work regardless of the processor?
Were wrong and have included some file somewhere?
My error :
| Code: | PLL();
setup_compare(1,COMPARE_PWM | COMPARE_TIMER2 );
setup_timer2(TMR_INTERNAL | TMR_DIV_BY_8,10 );
setup_spi( FALSE );
setup_spi2( FALSE );
setup_timer2(TMR_INTERNAL |TMR_DIV_BY_8 ,1200);
setup_timer4(TMR_DISABLED |TMR_DIV_BY_1 ,0);
setup_timer3(TMR_DISABLED |TMR_DIV_BY_1 ,0);
setup_timer5(TMR_DISABLED |TMR_DIV_BY_1 ,0);
setup_timer1(TMR_DISABLED|TMR_DIV_BY_1); |
| Code: | setup_motor_pwm(1,MPWM_FREE_RUN | MPWM_SYNC_OVERRIDES, 50000);
set_motor_unit( 1,MPWM_ENABLE , MPWM_FORCE_L_1,MPWM_FAULT_NO_CHANGE,0);
set_motor_pwm_duty(1,0,0x55); |
| Code: | Executing: "C:\Program Files\PICC\Ccsc.exe" +FD "main.c" #__DEBUG=1 +ICD +DF +LN +T +A +M +Z +Y=9 +EA #__dsPIC33FJ64GS406__=TRUE
*** Error 12 "main.c" Line 53(16,17): Undefined identifier -- setup_motor_pwm
*** Error 12 "main.c" Line 54(20,21): Undefined identifier -- set_motor_unit
*** Error 12 "main.c" Line 55(22,23): Undefined identifier -- set_motor_pwm_duty
3 Errors, 0 Warnings. |
I searched the forum and I found no solution to this |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Jun 17, 2011 4:51 pm |
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The original poster is using the MC verison of the PIC. "MC" stands
for "motor control". Look in the PCD compiler manual. It says:
| Quote: |
setup_motor_pwm( )
Availability: Devices that have the motor control PWM unit. |
You are using the GS version, the dsPIC33FJ64GS406. It is
intended for Digital Power control applications. It does not have a
Motor Control PWM module. Therefore, the compiler doesn't support
the motor control functions for your PIC. |
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