Atomic SerialPort.Write

NETMF & Gadgeteer
1 

SerialPort _port = new SerialPort("COM1");
_port.Write(new byte[] { 0x5 }, 0, 1);

Is the call to _port.Write Atomic?

2

@ Mr. John Smith - In the sample shown, you instantiate the serial port and then use it. No other thread has access to it. Why the atomic concern?

If I had multiple threads writing to a serial port, I would use a lock on the port, before writing, to it to insure there was not an issue.

3

(It’s answers like that, which rub me the wrong way)

@ Mike - If an RLP interrupt ocours, will the system switch from executing the Serial Write Command to processing the RLP interrupt?

4

???

5

Serial read and write run through internal buffers that use interrupts. Anything else can safely interrupt the transfer.

6

So and RLP interrupt occurring will interrupt the transfer. Can NETMF interrupts interfere with the transfer? Since I can’t use CAN bus anymore I’m planning to use Reed-Solomon to keep errors out and to avoid re transmission.

EDIT: (or some other non-binary cyclic error-correcting code)