add MultiPlexer_TCA9548A

Author: thijstriemstra

MultiPlexer_TCA9548A/MultiPlexer_TCA9548A.cpp

@@ -0,0 +1,19 @@
+/*
+  MultiPlexer_TCA9548A.h - Control TCA9548A I2C multiplexer.
+*/
+
+#include "MultiPlexer_TCA9548A.h"
+
+MultiPlexer_TCA9548A::MultiPlexer_TCA9548A(int i2c_addr) {
+  _mux = new TCA9548A(i2c_addr);
+}
+
+void MultiPlexer_TCA9548A::begin() {
+  _mux->begin(Wire);             // TwoWire instance can be passed here as 3rd argument
+  _mux->closeAll();              // Set a base state which we know (also the default state on power on)
+  changeBus(0);          // tell the TCA9548A we want to use I2C bus number zero (to talk to the OLED)
+}
+
+void MultiPlexer_TCA9548A::changeBus(uint8_t bus_nr) {
+  _mux->openChannel(bus_nr);
+}

MultiPlexer_TCA9548A/MultiPlexer_TCA9548A.h

@@ -0,0 +1,22 @@
+/*
+  MultiPlexer_TCA9548A.h - Control TCA9548A I2C multiplexer.
+*/
+#ifndef MultiPlexer_TCA9548A_h
+#define MultiPlexer_TCA9548A_h
+
+#include <Arduino.h>
+#include <Wire.h>
+#include <TCA9548A.h>
+
+class MultiPlexer_TCA9548A
+{
+  public:
+    MultiPlexer_TCA9548A(int i2c_addr = 0x70);
+    void begin();
+    void changeBus(uint8_t bus_nr);
+
+  private:
+    TCA9548A* _mux;
+};
+
+#endif