Changing pins for ADS1115

[ChaosSpear]

Just like the topic says - I've got a project that will involve a UCTronics TFT screen that plugs directly into the GPIO, so I need to move the SDA/SCL wires for my Analog-Digital Converter to GPIO channels 5/6.

I'm using this python code to set up the i2c:

Code: Select all

import board, busio
i2c = busio.I2C(board.SCL, board.SDA)

I thought it would be as simple as changing the arguments passed to busio.I2C, so I went into python, did dir(board) and assumed that the D0-D27 were the GPIO channels, but changing the argument to (board.D6, board.D5) didn't work.

Any help?

[ChaosSpear]

Okay, so I found this: https://raspberrypi.stackexchange.com/q ... spberry-pi

And I made the changes to /boot/config.txt as it said, but when I run the python program it still says that there is no hardware i2c there.

I know I'm doing something dumb... please someone save me from myself?

[joan]

Hardware I2C is available on GPIO 2/3 only on the Pi. If busio insists on using hardware I2C you will need to find an alternative solution.

[ChaosSpear]

Hardware I2C is available on GPIO 2/3 only on the Pi. If busio insists on using hardware I2C you will need to find an alternative solution.

EDIT: re-wrote this post as I realize I was really off the mark.

Firstly, thank you for the reply. Second, from what I'm reading, I can use GPIO 2/3 for both SPI and I2C at the same time, right? So I can use my screen and my ADC at the same time, by connecting them both to GPIO 2/3?

[DougieLawson]

Hardware I2C is available on GPIO 2/3 only on the Pi. If busio insists on using hardware I2C you will need to find an alternative solution.

EDIT: re-wrote this post as I realize I was really off the mark.

Firstly, thank you for the reply. Second, from what I'm reading, I can use GPIO 2/3 for both SPI and I2C at the same time, right? So I can use my screen and my ADC at the same time, by connecting them both to GPIO 2/3?

I2C is a multidrop bus. The RPi is the master/controller. Each slave/sensor device has a unique address between x'03' and x'77'. So as long as two slave devices have unique bus addresses they can share the I2C bus.