NXC  Version 1.2.1 r5
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long I2CStatus ( const byte  port,
byte &  bytesready 

Get I2C status.

This method checks the status of the I2C communication on the specified port. If the last operation on this port was a successful I2CWrite call that requested response data from the device then bytesready will be set to the number of bytes in the internal read buffer.

portThe port to which the I2C device is attached. See the Input port constants group. You may use a constant or a variable. Constants should be used where possible to avoid blocking access to I2C devices on other ports by code running on other threads.
bytesreadyThe number of bytes available to be read from the internal I2C buffer. The maximum number of bytes that can be read is 16.
A status code indicating whether the write completed successfully or not. See CommLSCheckStatusType for possible return values. If the return value is NO_ERR then the last operation did not cause any errors. Avoid calls to I2CRead or I2CWrite while I2CStatus returns STAT_COMM_PENDING.
See Also
I2CCheckStatus, I2CRead, I2CWrite, LowspeedStatus, LowspeedRead, LowspeedWrite, and LowspeedCheckStatus