ESP32 Treiber für I2C Display AiP31068L ardiuno.h wire.h

Ablauf 1:

Wire.begin(); <-- Init Hardware

Wire.beginTransmission(I2C_DEV_ADDR); <-- Buffer index reset, txadresse wird gesetzt

Wire.write(x); <-- tx buffer füllen

Wire.endTransmission(); <-- startet den i2c stream

Ablauf 2:

Wire.requestFrom(I2C_DEV_ADDR, SIZE); <-- sendet i2c adresse mit (R/W=1) bit. 

Wire.readBytes(temp, error);

#define _PIN_DEBUG_CH4 4  ///< GPIO pin for debug with logic analyzer

#define _PIN_DEBUG_CH5 5  ///< GPIO pin for debug with logic analyzer

#define _PIN_DEBUG_CH6 6  ///< GPIO pin for debug with logic analyzer

#define _PIN_DEBUG_CH7 7  ///< GPIO pin for debug with logic analyzer

#include <Wire.h>

#define _LCD_ADDRESS 0x7C >> 1  // 7-Bit-Adresse des AiP31068L

class AIP31068L {

private:

  uint8_t lcdAddress;  // Interne Variable zur Speicherung der Adresse

public:

  AIP31068L(uint8_t address) {

    lcdAddress = address;

  }

  void write() {

    uint8_t controlByte;

    uint8_t dataByte;

    uint8_t error;

    controlByte = 0x00;

    dataByte = 0x00;

    Wire.beginTransmission(lcdAddress);

    Wire.write(controlByte);

    Wire.write(dataByte);

    error = Wire.endTransmission(true);

    if (error != 0) {

      Serial.println("Fehler: Übertragung fehlgeschlagen");

    }

  }

  void read() {

    Wire.requestFrom(lcdAddress, 2, true);

  }

};

AIP31068L lcd(_LCD_ADDRESS);

void setup() {

  Serial.begin(115200);

  pinMode(_PIN_DEBUG_CH4, OUTPUT);

  pinMode(_PIN_DEBUG_CH5, OUTPUT);

  pinMode(_PIN_DEBUG_CH6, OUTPUT);

  pinMode(_PIN_DEBUG_CH7, OUTPUT);

  digitalWrite(_PIN_DEBUG_CH4, LOW);

  digitalWrite(_PIN_DEBUG_CH5, LOW);

  digitalWrite(_PIN_DEBUG_CH6, LOW);

  digitalWrite(_PIN_DEBUG_CH7, LOW);

  digitalWrite(_PIN_DEBUG_CH4, HIGH);

  Wire.begin();

  digitalWrite(_PIN_DEBUG_CH4, LOW);

  digitalWrite(_PIN_DEBUG_CH5, HIGH);

  lcd.write();

  digitalWrite(_PIN_DEBUG_CH5, LOW);

  digitalWrite(_PIN_DEBUG_CH6, HIGH);

  lcd.read();

  digitalWrite(_PIN_DEBUG_CH6, LOW);

}

void loop() {

}