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Cette page présente les constantes symboliques définies dans CrcLib en utilisant la directive du prepré-processeur #define.

View the english version of this page.

Broches

Les broches du CrcDuino sont accessibles en utilisant les constantes symboliques suivantes. Elles sont déjà définies par CrcLib en utilisant des directives au pré-processeur #define, qui permettent aux programmeurs de donner des noms explicites à certaines portion de leur code.

Tip

For more information about the hardware aspect of the I/O pins, refer to the CrcDuino Hardware Details page.

Info

We encourage programmers to use their own #define preprocessor directive at the top of their .ino file to give pins a name in their program that reflects its effective use (instead of the generic CRC_xxx_x), for example:

#define RIGHT_FEEDER_MOTOR CRC_PWM_5

#define ARM_EXTENDED_LIMIT_SWITCH CRC_DIG_1

In these cases, whenever

Digital Pins

These pins read or outputs digital signals.

  • CRC_DIG_1

  • CRC_DIG_2

  • CRC_DIG_3

  • CRC_DIG_4

  • CRC_DIG_5

  • CRC_DIG_6

  • CRC_DIG_7

  • CRC_DIG_8

  • CRC_DIG_9

  • CRC_DIG_10

  • CRC_DIG_11

  • CRC_DIG_12

The numbers for the pins match the one written on the board.

These pins are used with the SetDigitalPinMode()GetDigitalInput() or SetDigitalOutput() CrcLib function.

PWM Pins

These pins output Servo type PWM signals.

  • CRC_PWM_1

  • CRC_PWM_2

  • CRC_PWM_3

  • CRC_PWM_4

  • CRC_PWM_5

  • CRC_PWM_6

  • CRC_PWM_7

  • CRC_PWM_8

  • CRC_PWM_9

  • CRC_PWM_10

  • CRC_PWM_11

  • CRC_PWM_12

The numbers for the pins match the one written on the board.

These pins are used with the InitializePwmOutput()SetPwmOutput()MoveTank()MoveArcade() or MoveHolomonic() CrcLib function.

Analog Pins

These pins read and quantify analog voltage signals.

  • CRC_ANA_1

  • CRC_ANA_2

  • CRC_ANA_3

  • CRC_ANA_4

The numbers for the pins match the one written on the board.

These pins are used with the GetAnalogInput()CrcLib function.

Communication Pins

These pins are used to communicate with the outside world using various communication protocols.

Note

No CrcLib functions are wrote to be used with the communication pins. Their pinMode() are not set by CrcLib::Initialize().

SPI Port
  • CRC_SPI_MISO

  • CRC_SPI_MOSI

  • CRC_SPI_SCK

  • CRC_SPI_SS

These pins can be used with the Arduino standard SPI library.

I2C Port
  • CRC_I2C_SDA(physically aligned w/ the “MISO” mark)

  • CRC_I2C_SCL(physically aligned w/ the “MOSI” mark)

These pins can be used with the Arduino standard Wire library for I2C networking.

SERIAL Port
  • CRC_SERIAL_TXD1(physically aligned w/ the “MISO” mark)

  • CRC_SERIAL_RXD1(physically aligned w/ the “MOSI” mark)

These pins can be used with the native Arduino Serial communication functions.

Info

I2C and Serial pins are interrupt pins, so they instead could be used to monitor additional encoders instead of managing I2C or Serial communication, or used for any other task requiring interrupt input capability. They would then must be first set as INPUT using the native Arduino function pinMode().

Encoder Pins

These pins are meant to be used to read digital signals coming from a quadrature encoder.

Note

These pins are set as INPUT by CrcLib::Initialize(). No CrcLib functions has currently been prepared to be used with these pins, but they can be used with any encoder library. We recommend using Paul Stoffregen’s library named Encoder, as detailed here.

ENCO Port
  • CRC_ENCO_A (physically aligned w/ the “MISO” mark)

  • CRC_ENCO_B (physically aligned w/ the “MOSI” mark)

Info

These pins are interrupt pins, so they could be used for any other task requiring interrupt input capability instead of reading quadrature encoder data.

Physically inaccessible pins

  • CRC_LM35D : Reserved for receiving temperature data from the board temperature sensor, if installed. Most CrcDuino boards don't have a LM35D temperature sensor installed. If there's no component soldered in the 3 holes right below the 0270 inscription next to the buzzer, it means your board is not equipped with a temperature sensor.

  • CRC_VBATT : Reserved for reading the board power source voltage. It's highly recommended to use the GetBatteryVoltage()  function instead of directly reading from this pin using the native Arduino function digitalRead().

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