MUX_SW_NXP_Arduino

I2C multiplexer/switch device operation sample code for Arduino

Note This library works with I2C_device library together. Please be sure the I2C_device library is imported in your environment before trying to build.

PCA9846PW-ARD : Arduino® Shield Evaluation Board for I²C switch

What is this?

An Arduino library for I²C multiplexer/switch with sample code.
This library provides simple API to switch I²C bus.
Include device name header file (PCA9846.h) to use those class libraries.

#include <PCA9846.h>

PCA9846 sw;

void setup() {
  Wire.begin();

  sw.select(PCA9846::CH0 | PCA9846::CH1 | PCA9846::CH2 | PCA9846::CH3);
}

void loop() {
  ...
  sw.select(PCA9846::CH0 | PCA9846::CH1 | PCA9846::CH2 | PCA9846::CH3);	//	Select all channels
  ...
  sw.select(PCA9846::CH0);	//	Select channel-0 only
  ...
  sw.select(PCA9846::CH2 | PCA9846::CH3);	//	Select channel-2 and 3
}

Supported device

Type#	Header file	Features	Interface	Evaluation board
PCA9846	PCA9846.h	Four-Channel Ultra-Low Voltage, Fm+ I²C-Bus Switch with Reset	I²C Fast-mode Plus (1MHz)	PCA9846PW-ARD Arduino® Shield

Getting started

Use Library manager in Arduino IDE for easy install

What's inside?

Examples

Examples are provided as scketch files.

How to use?

After library install, Choose menu on Arduino-IDE: File→Examples→MUX_SW_NXP_Arduino→ PCA9846_demo_w_M24C02

Sample code

This repo is including only one sample code: PCA9846_demo_w_M24C02. It will demonstrate the PCA9846PW-ARD Arduino® Shield with devices on the board.

The PCA9846PW-ARD Arduino® Shield has a PCA9846: I²C bus switch with 4x M24C02: EEPROMs. The sample program writes data into all those EEPROM in setup() function. In loop() function, it repeats to access those EEPROM with changing the PCA9846 channel setting.

Document

For details of the library, please find descriptions in this document.

Related libraries

Library	Feature	Target devices	Required library
GPIO_NXP_Arduino	GPIO libraries	PCAL6408A, PCAL6416A, PCAL6524, PCAL6534, PCA9555, PCA9554	I2C_device_Arduino
LCDDriver_NXP_Arduino	LCD driver libraries	PCA8561	I2C_device_Arduino
LEDDriver_NXP_Arduino	LED driver libraries	PCA9955B, PCA9956B, PCA9957	I2C_device_Arduino
MUX_SW_NXP_Arduino	I²C mux/switch libraries	PCA9846	I2C_device_Arduino
RTC_NXP_Arduino	RTC libraries	PCF2131, PCF85063A	I2C_device_Arduino
TempSensor_NXP_Arduino	Temperature sensor libraries	LM75B, PCT2075, P3T1085	I2C_device_Arduino
I2C_device_Arduino	Base library for I²C operations	none (can be applied as base class for all I²C targets)	---