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Software => Software => Topic started by: saliraza on April 05, 2009, 05:28:53 PM

Title: NEED HELP!!! with PWM on Axon....
Post by: saliraza on April 05, 2009, 05:28:53 PM

Hi Everyone,

I am very tired and frustrated after trying many things for simply getting 4 PWM controlled outputs from my Axon. I would really appreciate anyone's help in this regard.

I have been working with microcontrollers, PICS, ATMEGA's, 8051 etc etc ..... I love Axon, but here is my problem:

I just need to get 4 PWM individual outputs from my Axon. The code I am using is provided below;

   PWM_Init_timer2_H6(8);//9 doesn't work
   delay_ms(100);
   PWM_Init_timer3_E3(8);
   delay_ms(100);
   PWM_Init_timer3_E4(8);
   delay_ms(100);
   PWM_Init_timer3_E5(8);
   delay_ms(100);

   PWM_timer2_On_H6();
   PWM_timer3_On_E3();
   PWM_timer3_On_E4();
   PWM_timer3_On_E5();
   delay_ms(1000);

   PWM_timer2_Set_H6(127);
   PWM_timer3_Set_E3(127);
   PWM_timer3_Set_E4(127);
   PWM_timer3_Set_E5(127);
   delay_ms(5000);

   PWM_timer2_Set_H6(254);
   PWM_timer3_Set_E3(254);
   PWM_timer3_Set_E4(254);
   PWM_timer3_Set_E5(254);
   delay_ms(5000);

   PWM_timer2_Set_H6(127);
   PWM_timer3_Set_E3(127);
   PWM_timer3_Set_E4(127);
   PWM_timer3_Set_E5(127);
   delay_ms(5000);

   PWM_timer2_Set_H6(191);
   PWM_timer3_Set_E3(191);
   PWM_timer3_Set_E4(191);
   PWM_timer3_Set_E5(191);
   delay_ms(9000);

   PWM_timer2_Off_H6();
   PWM_timer3_Off_E3();
   PWM_timer3_Off_E4();
   PWM_timer3_Off_E5();
   delay_ms(1000);


THE PROBLEM:

Only H6 is doing what its suppose to ..... E3,E4, and E5 are simply dead not doing anything....... Why why why????  :?(  Please Help ..... Admin ????

Please do not recommend me the Tutorial, or the basic links available on the SoR, I have already tried several of these and NO RESULTS ..... I just wanted to know why the code above is not working and what is wrong with it.

Regards,

Ali

Title: Re: NEED HELP!!! with PWM on Axon....
Post by: Admin on April 05, 2009, 09:22:15 PM

PWM on the E port only works with the latest code version. I am guessing you are using the old code version?

Title: Re: NEED HELP!!! with PWM on Axon....
Post by: saliraza on April 13, 2009, 06:30:42 PM

Thanks for the reply Admin,

I am able to use other PWM ports and to get them working I had to change the timer prescale settings in timer640.h as such:

#define TIMER0PRESCALE      TIMER_CLK_DIV1024      ///< timer 0 prescaler default//original was TIMER_CLK_DIV8
#define TIMER1PRESCALE      TIMER_CLK_DIV64      ///< timer 1 prescaler default
#define TIMER2PRESCALE      TIMERRTC_CLK_DIV64   ///< timer 2 prescaler default
#define TIMER3PRESCALE      TIMERRTC_CLK_DIV8   ///< timer 3 prescaler default
#define TIMER4PRESCALE      TIMERRTC_CLK_DIV8   ///< timer 4 prescaler default
#define TIMER5PRESCALE      TIMER_CLK_DIV64      ///< timer 4 prescaler default

if you notice i changed the timer 3 and 4 prescale to use TIMERRTC_CLK_DIV8 instead of original values such as used with timer5 .... now all the PWM channes work fine E3,E4,E5,H3,H4,H5, and H6.

I am now working to do proper scaling of the Accelerometers and Gyro measurement. I am posting a new topic please help me there.

Regards,

Ali