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Recent content by alexsoad

  1. A

    Usage of the same timer for 2 modules

    "bit 7 ICTMR: Input Capture Timer Select bits 1 = TMR2 contents are captured on capture event 0 = TMR3 contents are captured on capture event Note: Timer selections may vary. Refer to the device data sheet for details. " What should i do with this if i use a software timer? It looks like IC...
  2. A

    Usage of the same timer for 2 modules

    Hello, My dspic (dsPIC30F3014) does have only 3 timers. For OC module ( output compare ) and IC module ( input capture ) there are available only 2 timers, Timer 2 and Timer 3. I need to command 2 DC motors, and i use 2 OC modules, using a timer each. Now, for my IC module, i do not have any...
  3. A

    Help with PLL for dsPIC30F3014

    again thank you :)
  4. A

    Help with PLL for dsPIC30F3014

    thanks a lot :) now i need one more thing : I need to know the correct formula for FCY. I founded 2 variants : FOSC/2 and FOSC/4 I intend to think FCY is FOSC/4 for my microcontroller, but i am not sure.
  5. A

    Help with PLL for dsPIC30F3014

    Hello, I need to know if this instruction will grant me a PLL of 16x for dspic30F3014: _FOSC(CSW_FSCM_OFF & FRC_PLL16) It will result a frequency of 16*7.37 ~= 120 MHZ ??? Thank you in advance, Alex
  6. A

    dsPIC30F3014's TIMERS

    Hi, i do have a problem managing the timers on dsPIC30F3014. This microcontroller has 3 Timers: T1, T2 and T3. For my project i use T2 and T3 to generate 2 PWM signals, that control 2 DC motors independently. I do some Analog to Digital conversion, and i configured to be managed by "Internal...
  7. A

    Problems generating PWM signal with dsPIC30F3014

    I need to generate a PWM signal to command a DC motor via L298N driver. I user dsPIC30F3014 to do this, but i cannot generate it and i need some help from you. I user C programming language. So: _FOSC(CSW_FSCM_OFF & FRC_PLL16); //using internal oscillator //this is for an external interrupt...
  8. A

    Problem with DC Motor and L298N driver

    update: I made some tests and i cannot explain some results, so i need some help again. At 12 V, both motors are working fine, but if i lower the voltage down to 9 V, sometimes the motors just don't start. I don't get it... why? At 9 V sometimes the motors start, but other times they start for...
  9. A

    Problem with DC Motor and L298N driver

    problem solved :) the resistance from the sensing pin is clearly too big and this is the main reason for having no power to supply the motors. i let for one terminal block the sensing resistance connected, and the motor doesn't starts, and for the second terminal block i removed the sensing...
  10. A

    Problem with DC Motor and L298N driver

    .update to my problem. I have removed the 1k Resistor, and i connected the sense pin to ground. New improvments: I measure the voltage between OUT1 and OUT2, and it is all ok. (6-7V) I connect the wires to the motor, and for a short period of time (0.2 sec) the motor starts, but after that it...
  11. A

    Problem with DC Motor and L298N driver

    Hello, For my project i am using a L298N motor driver to command 2 DC Motors (200 mA, 6-9V). For beginning, let me post the part of the schematic where the problem occurs: **broken link removed** I made a test board , but i cannot make the motors to start. I set IN1 to 5 volts, IN2 to 0 volts...
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