| External Interfaces/API | |
Indicate if an asynchronous read or write operation is in progress
Description
TransferStatus can be idle, read, write, or read&write. If TransferStatus is idle, then no asynchronous read or write operations are in progress. If TransferStatus is read, then an asynchronous read operation is in progress. If TransferStatus is write, then an asynchronous write operation is in progress. If TransferStatus is read&write, then both an asynchronous read and an asynchronous write operation are in progress.
You can write data asynchronously using the fprintf or fwrite functions. You can read data asynchronously using the readasync function, or by configuring the ReadAsyncMode property to continuous. While readasync is executing, TransferStatus might indicate that data is being read even though data is not filling the input buffer. If ReadAsyncMode is continuous, TransferStatus indicates that data is being read only when data is actually filling the input buffer.
You can execute an asynchronous read and an asynchronous write operation simultaneously because serial ports have separate read and write pins. Refer to Writing and Reading Data for more information about synchronous and asynchronous read and write operations.
Characteristics
| Read only |
Always |
| Data type |
String |
Values
Functions
Properties
| | TimerPeriod | Type | |