Update writeBytes to write buffer instead of byte wise.

Author: nseidle

README.md

@@ -43,6 +43,7 @@ Products that use this Library
 Version History
 ---------------
 
+* [V_3.x] - Incorporate PRs including the ability to pass in a wire port in begin().
 * [V_2.0.1](https://github.com/sparkfun/SparkFun_SX1509_Arduino_Library/tree/V_2.0.1) - Version 2.0.1. More user-friendly function calls. Increased clock functionality. More examples. Mostly backwards compatible with older versions.
 * [V_1.0.0](https://github.com/sparkfun/SparkFun_SX1509_Arduino_Library/tree/V_1.0.0) - Version 1.0.0
 

src/SparkFunSX1509.cpp

@@ -849,10 +849,7 @@ bool SX1509::writeBytes(uint8_t firstRegisterAddress, uint8_t *writeArray, uint8
 	_i2cPort->beginTransmission(deviceAddress);
 	bool result = _i2cPort->write(firstRegisterAddress);
 	int i = 0;
-	while (result && i < length)
-	{
-		result = _i2cPort->write(writeArray[i++]);
-	}
+	result = _i2cPort->write(writeArray, length);
 	uint8_t endResult = _i2cPort->endTransmission();
 	return result && (endResult == I2C_ERROR_OK);
 }