API Reference

The CAN Dragon SDK exposes two public API surfaces:

API	Header / Assembly	Language	Error model
C API	EmSACAN.h / `EmSACAN.dll`	C99	Return codes (emsacan_result_t)
C# Wrapper	`EmSACANNET.dll`	.NET 6+	Exceptions (`EmSACANException`)

Both APIs call the same native library underneath. The Program Flow guide applies to both.

Choose your API

Native library for C/C++ applications. Return-code error handling, wide-string serial numbers, direct struct access.

Managed wrapper for .NET applications. Exception-based errors, IDisposable sessions, typed helpers.

Step	C API	C# API
Initialize	EmSACAN_Startup	EmSACANLibrary.Startup
Enumerate	EmSACAN_EnumerateInterfaces	EmSACANLibrary.EnumerateInterfaces
Connect	EmSACAN_Connect	CanDragonDevice.Connect
Configure	EmSACAN_WriteParameter	WriteChannelConfig
Open port	EmSACAN_OpenChannel	OpenChannel
Transmit	EmSACAN_Write	Write
Receive	EmSACAN_Read	Read
Close port	EmSACAN_CloseChannel	CloseChannel
Disconnect	EmSACAN_Disconnect	Dispose
Shutdown	EmSACAN_Shutdown	EmSACANLibrary.Shutdown