lahasafari.blogg.se - Does the arduino wire library use interrupts

Especially on boards that just don't have enough hardware interrupt pins, having this functionality basically enables FOC on these boards. Software interruptsUsing the hardware external interrupts usually results in better and more reliable performance but software interrupts will work very well for lower velocities.

Only for Arduino devices (ATmega328 and ATmega2560).

Using software pin change interrupt by using a library such as PciManager library.

There are two ways you can run encoders with Simple FOC library. Recommended pull-up values are between 1kΩ and 5kΩ. pullup = Pullup :: USE_INTERN Īrduino Pullup 20kΩBe careful when using internal pullups, Arduino has relatively high valued pullups around 20kΩ, which means that you might have some problems for higher velocities (for shorted impulse durations).

check if you need internal pullups // Pullup::USE_EXTERN - external pullup added - default // Pullup::USE_INTERN - needs internal arduino pullup encoder. The default value is set to Pullup::USE_EXTERN but if you would like to change it to use the MCU ones do: That is set by changing the value of the encoder.pullup variable.

Many encoders require pullups and in cases when you have an encoder that needs one and you don’t have one on your hands you can use Arduino pullups. For quadrature mode you will have CPR = 4xPPR and if not using quadrature mode you will have CPR=PPRĪdditionally the encoder has one more important parameter and this is the pullup location. Now depending on whether you use quadrature mode (counting each edge of the impulse) or not (counting just the rising edge) you will have different CPR for the same PPR. CPR (counts per revolution) - this is amount you are going to have in your counter after the full rotation of the encoder. quadrature = Quadrature :: OFF ĬPR, PPR?!PPR (pulses per revolution) - this is the physical number of impulses the encoder has per revolution. Quadrature mode enabling and disabling // Quadrature::ON - CPR = 4xPPR - default // Quadrature::OFF - CPR = PPR encoder.