Configuring I2C communication - TDA9950 HDMI CEC

Projects Networking, Protocols, and Devices
6

I just write the code as the datasheet show...

Check it... It is right?

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image799×431 20.6 KB 

void Write_TDA9950(){
  Wire.beginTransmission(0x34); //  0x34 - TDA9950
  Wire.write(0x00); // SET ADDRESS POINTER - 0x00 - CSR
  Wire.endTransmission(); // CLOSE
  Wire.requestFrom(0x34,7, true); 
  
  CSR = Wire.read();
  do {
    CSR = Wire.read();
    if (bitRead(CSR,7)==1) // CHECK bit 7 OF CSR. WHEN IS HIGH, BREAK
      break;
    delay(10);
  } while (1);

  Wire.beginTransmission(0x34); //  0x34 - TDA9950
  Wire.write(0x07); // SET ADDRESS POINTER 0x07 - CDR
  Wire.write(0x04);
  Wire.write(0x00); // CECDATA.req
  Wire.write(0x40); // AddressByte = DVD/TV
  Wire.write(0x0D); // DataByte = <TextView On> - Details HDMI V1.3a
  Wire.endTransmission(); // CLOSE

  CSR = Wire.read();
  do {
    CSR = Wire.read();
    if (bitRead(CSR,6)==1) // CHECK bit 6 OF CSR. WHEN IS HIGH, BREAK. It is possible check the INT output PIN
      break;
    delay(10);
  } while (1);

  Wire.beginTransmission(0x34); // 0x34 - TDA9950
  Wire.write(0x07); // SET ADDRESS POINTER 0x07 - CDR
  Wire.endTransmission(); // CLOSE

  Wire.requestFrom(0x34,7, true); 

  for( int i=0; i<7; i++)
  {
    Serial.print( "0x");
    Serial.print( Wire.read(), HEX);
    Serial.print( ", ");
  }
  Serial.println();
}

Thanks!