setInputPolarity()

Description

Set signal polarity for pin A, B and Z, such as: Under the Pulse/DIR mode, set pin A polarity to LOW, which configure the system to interpret the low voltage condition for pin A as signal HIGH and high voltage condition for the pin as signal LOW.

This function is valid under the Pulse/DIR, CW/CCW and A/B Pulse operating mode.

Syntax


Enc0.setInputPolarity(polA, polB, polZ)
Enc1.setInputPolarity(polA, polB, polZ)
Enc2.setInputPolarity(polA, polB, polZ)
Enc3.setInputPolarity(polA, polB, polZ)


Parameters

Enc0、Enc1、Enc2、Enc3：Corresponding to ENC0, ENC1, ENC2 and ENC3 encoder interfaces.

polA：Set to HIGH or LOW.
When set to HIGH, pin A high voltage condition translate to logic HIGH and low voltage condition translate logic LOW.
When set to LOW, pin A high voltage condition translate to logic LOW and low voltage condition translate to logic HIGH.

polB：Set to輸入 HIGH or LOW.
When set to輸入 HIGH, pin B high voltage condition translate to logic HIGH and low voltage condition translate logic LOW.
When set to LOW, pin B high voltage condition translate to logic LOW and low voltage condition translate to logic HIGH.

polZ：Set to HIGH or LOW.
When set to HIGH, pin Z high voltage condition translate to logic HIGH and low voltage condition translate logic LOW.
When set to LOW, pin Z high voltage condition translate to logic LOW and low voltage condition translate to logic HIGH.

Returns

None

Example

#include <Encoder.h>
 
void setup() {
  Serial.begin(9600);
  Enc0.begin(MODE_AB_PHASE);
  Enc0.setInputPolarity(HIGH, HIGH, LOW); // Set pin Z polarity to the reversed condition:  When the pin is in voltage HIGH condition,it’s translated to logic LOW and when it’s in voltage LOW condition,it’s translated to logic HIGH
}
 
void loop() {
  Serial.println(Enc0.read());
  delay(100);
}

See also

－ begin()
－ setIndexReset()
－ read()

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The text of the 86Duino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.