hello snackescb
can make the circuit, load the program for c8051f330 of silab?
I just loaded circuits for avr and pic, can you help me?

Originally Posted by snakescb

Hi again,

Ok, attached you can find my simple implementation for scilabs controllers. Not perfect yet, still working on, but I already made a lot of flights using this FW with some turnigy plush 12 esc's. I am developing the code in Ride7 and it is compiled using the RKit-51 on a hobbyist license.

Some ideas how to make motor startup smoother?

looking forward to receive some feedback

Hi,

im not good with assembly .. but i also build a ESC atm. ..

the startup works smooth with about 25% PWM (depending on input voltage) i dont did anything special. so here is generally how i do it:

rotorState = 0

startup(){
  if(rotorState == 0){
     commutateStep_0;
     setADCsForBackEMF_1;
     rotorState = 1;
  }else if(rotorState == 1){
     commutateStep1;
     setADCsForBackEMF_2;
     rotorState = 2;
  } .. so on
}

to get rid of some ADC interrupt noise i do some edge verification in startup phase. delayed by arround 5us atm. 3 times.

so:

compInterrupt(){ // backEMF interrupt
  if(startup){
    if(edge != exepted edge) return;
    delay 5us;
    if(edge != exepted edge) return;
    delay 5us;
    if(edge != exepted edge) return;

  }
  ...
}

i use 40 goodies (successful backEMF interrupts in a row)

here is a video .. active freewheel works also .. as you can see on the voltage display :P (the power supply dont likes it)

CIMG4088 (0 min 0 sec)

regards felix

Hi Felix,
that looks very good.Nice startup response.

go on and make it a sucsess

grz B.

Hi Felix....

this is quite impressive... I still have to work on my startup until I reach this Thanks a lot for your help...

Does anybody use any BLDC development kit?
I'm thinking about using this TI kit: https://estore.ti.com/DK-LM4F-DRV831...MCU-P3033.aspx

Thoughts?

Hi Felix, thanks a lot for posting this!