NHD-7.0-800480EF-ASXN-CTP Touch Controller

meder

• February 20, 2020 10:07

I have the NHD-7.0-800480EF-ASXN-CTP  with a 5406 CTP on it. 

I looked at the data sheet for the 5x26 and the 5x06,  and neither specify the I2C  address.
 
Searching around I see it maybe 0x38.  But I get no ACK in the I2C buss.

Emailed customer service and got no response.  Any help appreciated.

Thanks

0

• 

  Ted M.

  NHD Staff

  • February 21, 2020 11:07

  Hi Meder,
  
  The I2C slave address of the CTP is in the NHD-7.0-800480EF-ASXN-CTP datasheet under sample code on page 18.

  https://newhavendisplay.com/content/specs/NHD-7.0-800480EF-ASXN-CTP.pdf

  Sample code to read touch data:
  i2c_start();
  i2c_tx(0x70); //Slave Address (Write)
  i2c_tx(0x00); //Start reading address
  i2c_stop();
  i2c_start();
  i2c_tx(0x71); //Slave Address (Read)
  for(i=0x00;i<0x1F;i++)
  {touchdata_buffer[i] = i2c_rx(1);}
  i2c_stop();

  Regards, 

  0
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  erinsandoval

  • March 20, 2020 10:07

  Thanks for the information. It really helped me!

  0

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