MikroElektronika Forum

Hey all,

I hope this is the correct place for this question.
I'm learning about the I2C communication protocol using the ADC 16 Click board and my raspberry pi 4.
I can read and write to the registers using the I2C Frames shown in the TI datasheet of the processor on the click board.

I have done and verified the correct steps of getting the device in a specific mode (High Precision) and have set the correct clock speed.
However I cannot start communication as I cannot get the Click board to set the BUSY/RDY pin high.
I have to write to a start sequence register to set the pin high but sometimes it does go high for one clock cycle and sometimes it doesn't go high at all.
Could it be a pull up/pull down resistor problem? (the click uses 4.7k ohm and the GPIO pins of the pi about 50k ohm)
Or should I initialize something that I forgot?

Thank you in advance,
Marten

Hi,

The RDY pin should go high on its own as the module configures its I2C address.

All we do with this pin in our example is initialise it as a digital input.

It could be that the resistor you mentioned is causing the problem.

I will investigate this further.

Regards,

Ivan.