TMC22XX UART stepping example

[Flyguy]

I trying to move step motor with the uart only. I have used the folowed code:

TMC2209Stepper driver(&SERIAL_PORT, R_SENSE, DRIVER_ADDRESS);
void setup() {
  driver.begin();
  driver.toff(2); 
  driver.pdn_disable(true);
  driver.rms_current(600);
  driver.microsteps(16);
  driver.pwm_autoscale(true);
}
  void loop() {
   Serial.println("vactual");
   driver.VACTUAL(1000);
   delay(1000);
  }

With oscilloscope i have seen good datagram at tx. But driver did nothing.... What i doing wrong ?

[teemuatlut]

Would be curious to see that you don't need to call SERIAL_PORT.begin(19200); as the driver.begin() does not do that for you. Perhaps you particular platform initializes it for you.

However, I don't see a call to pull the enable line low.

driver.begin() already sets pdn_disable so you don't need to do that yourself.

[Flyguy]

Hello teemuatlut! Thank you for your reply. I am sorry, I have dropped some info for you. I have forgotten add it to this piece of code. I have used Serial1.begin(115200); Platform is esp8266. Driver is tmc2226 I trying to enable the driver in software. EN pin is always hight with pull up 10k resistor.

[teemuatlut]

The enable pin is active low, so you need to pull it gnd.

[Flyguy]

But what about this notice ?

[teemuatlut]

Sounds like a boot time condition you should be aware about but I've never seen it to be a problem if the EN pin would be pulled low when powering on.

[Flyguy]

In other words you trying to say what i can't enable the driver in software ? (without hardware pins from mc)

[teemuatlut]

One way or another you need to pull the enable line low in order to power on the coils.

EDIT: The condition seems to be just when using internal sense resistors, which is quite rare but you should follow the guideline if this happens to apply in your case.

[MahOraibi]

Do you mind if I pop in for a question? are you trying to move the motor without other libraries like accelsteppr or step (high/low)? is that possible? I really would love to do that directly from the board rather than from another library.

[Flyguy]

Do you mind if I pop in for a question? are you trying to move the motor without other libraries like accelsteppr or step (high/low)? is that possible? I really would love to do that directly from the board rather than from another library.

I have tested it yesterday... It's so primitive. VACTUAL command will set a motor speed. Motor speed can't be big. Any acceleration will no work with it. Motor will miss all steps on 1-2 rev/sec. In my current requirements big speed not needed. But I need count steps. I will don't use it.

[thecockroach]

Hi @Flyguy did you can move by counting steps? Im in the same problem with a TMC2209. Tks

[Flyguy]

I have not used it. And it was long time ago.. But I think you can try to using the index pin for this.

пт, 15 сент. 2023 г., 23:51 Fernando Mazzaferro @.***>:

Hi @Flyguy https://github.com/Flyguy did you can move by counting steps? Im in the same problem with a TMC2209. Tks

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