I'm working with NHD-7.0-800480EF-ATXL-CTP module and a microcontroller.
I'm trying to get information from the touch controller.
I'm sending the first byte, suggested by the data sheet:
i2c_tx(0x70); //Slave Address (Write)
But I get a NACK in the ninth bit of I2C communication, which means there is no response from the touch controller.
I've checked the electrical connections and all seems OK.
I'm not sure which value should be pull-up resistors on SCL and SDA.
Currently are 2.2K.
I2C communication works fine touch with another touch controller from another TFT (another manufacturer.)
Do you think that could be the problem?
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