add isConnected(address, channel)

CHANGELOG.md

@@ -6,14 +6,18 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.2.2] - 2024-01-01
+- add **bool isConnected(uint8_t address, uint8_t channel)**
+- minor edits
+
+
 ## [0.2.1] - 2023-12-09
 - add derived classes
   - PCA9543 (2 channel), PCA9545 (4 channel), PCA9546 (4 channel)
 - add **uint8_t getInterruptMask()**
 - fix begin() : remove wire-> begin() as dependency should be outside lib
 - fix readme.md
 
-
 ## [0.2.0] - 2023-12-09
 - refactor API, begin()
 - update readme.md

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021-2023 Rob Tillaart
+Copyright (c) 2021-2024 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -99,7 +99,9 @@ There are however small differences, check the data sheets to see the details.
 deviceAddress = 0x70 .. 0x77, wire = Wire or WireN.
 - **bool begin(uint8_t mask = 0x00)**  set mask of channels to be enabled, default all disabled.
 - **bool isConnected()** returns true if address of the multiplexer is found on I2C bus.
-
+- **bool isConnected(uint8_t address, uint8_t channel)** find address on selected channel.
+Note that this changes the selected and or enabled channels.
+Returns true if found.
 
 The derived classes PCA9548/PCA9546 have the same interface, except constructor.
 (see #15)

TCA9548.cpp

@@ -1,7 +1,7 @@
 //
 //    FILE: TCA9548.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2021-03-16
 // PURPOSE: Arduino Library for TCA9548 I2C multiplexer and compatibles.
 
@@ -42,6 +42,13 @@ bool TCA9548::isConnected(uint8_t address)
 }
 
 
+bool TCA9548::isConnected(uint8_t address, uint8_t channel)
+{
+  if (!selectChannel(channel)) return false;
+  return isConnected(_address);
+}
+
+
 uint8_t TCA9548::channelCount()
 {
   return _channels;

TCA9548.h

@@ -2,7 +2,7 @@
 //
 //    FILE: TCA9548.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.1
+// VERSION: 0.2.2
 //    DATE: 2021-03-16
 // PURPOSE: Arduino Library for TCA9548 I2C multiplexer and compatibles.
 //     URL: https://github.com/RobTillaart/TCA9548
@@ -12,7 +12,7 @@
 #include "Wire.h"
 
 
-#define TCA9548_LIB_VERSION             (F("0.2.1"))
+#define TCA9548_LIB_VERSION             (F("0.2.2"))
 
 
 //  ERROR CODES (to be elaborated)
@@ -31,7 +31,7 @@ class TCA9548
   bool    begin(uint8_t mask = 0x00);         //  default no channels enabled
   bool    isConnected();                      //  find multiplexer on I2C bus
   bool    isConnected(uint8_t address);       //  find any address on I2C bus
-
+  bool    isConnected(uint8_t address, uint8_t channel);  //  find address on selected channel
 
   //  channel = 0..channelCount()-1
   uint8_t channelCount();
@@ -95,7 +95,7 @@ class PCA9546 : public TCA9548
 };
 
 
-//  DEVICES WITH INTERRUPT 
+//  DEVICES WITH INTERRUPT
 
 //  SWITCH, 4 channel + reset + interrupt
 class PCA9545 : public TCA9548

library.json

@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/TCA9548"
   },
-  "version": "0.2.1",
+  "version": "0.2.2",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",

library.properties

@@ -1,5 +1,5 @@
 name=TCA9548
-version=0.2.1
+version=0.2.2
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino Library for TCA9548 I2C multiplexer and compatibles.