Merge pull request #28 from wollewald/wollewald-patch-2

Add files via upload - added I2C connection error detection
wollewald · Dec 24, 2023 · da78495 · da78495
2 parents 88fb6b8 + 892db5d
commit da78495
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Showing 4 changed files with 18 additions and 1 deletion.
diff --git a/keywords.txt b/keywords.txt
@@ -48,6 +48,7 @@ getPort	KEYWORD2
 getIntCap	KEYWORD2
 setSPIClockSpeed	KEYWORD2
 printAllRegisters	KEYWORD2
+i2cConnectionError	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)

diff --git a/library.properties b/library.properties
@@ -1,5 +1,5 @@
 name=MCP23017_WE
-version=1.6.7
+version=1.6.8
 author=Wolfgang Ewald <wolfgang.ewald@wolles-elektronikkiste.de>
 maintainer=Wolfgang Ewald <wolfgang.ewald@wolles-elektronikkiste.de>
 sentence=A library for the MCP23017, MCP23S17, MCP23018 and MCP23S18 port expanders. 

diff --git a/src/MCP23017.cpp b/src/MCP23017.cpp
@@ -645,6 +645,21 @@ void MCP23017::printBin(uint8_t val){
 }
 #endif // DEBUG_MCP23017 
 
+
+uint8_t MCP23017::i2cConnectionError(){
+	uint8_t error = 0;
+    if(!useSPI){
+#ifndef USE_TINY_WIRE_M_
+        _wire->beginTransmission(I2C_Address);
+        error = _wire->endTransmission();
+#else
+        TinyWireM.beginTransmission(I2C_Address);
+        error = TinyWireM.endTransmission();    
+#endif
+    }
+	return error;
+}
+
 /* Private Functions */
 
 void MCP23017::setResetPin(uint8_t rp){

diff --git a/src/MCP23017.h b/src/MCP23017.h
@@ -106,6 +106,7 @@ class MCP23017{
         uint8_t getIntCap(mcp_port);
         void setSPIClockSpeed(unsigned long clock); 
         void softReset();
+        uint8_t i2cConnectionError();
 #ifdef DEBUG_MCP23017  // see MCP23017_config.h
         void printAllRegisters();
         void printBin(uint8_t val);