I/O DLL Kit _ BDTIC a Leading Distributor in China

I/O DLL Kit

The simulator engine calls the functions that have been predefined on the I/O DLL side synchronously with the timing shown below:

After executing one instruction (number of execution cycles)
Before execution (PC value)
When the target is reset
When an interrupt occurs
Immediately before memory read (address information)
Immediately after memory write (address information)

Conversely, the following functions that have been made public for the simulator engine can be called from the I/O DLL side:

Get memory contents
Set a memory value
Get a register value
Set a register value
Interrupt occurrence
Confirm interrupt occurrence condition
Inspect the total number of cycles executed

The I/O DLL kit provides a means for extending the functions of the simulator debugger on High-performance Embedded Workshop. This kit supports the creation of I/O DLLs. The I/O DLL refers to a DLL(*1) that operates in cooperation with the simulator engine of the simulator debugger.

Once the necessary settings are made, the simulator debugger allows you to load an I/O DLL and operate it synchronously with the timing at which instructions are single-stepped, memory is read or written or an interrupt occurs. That way, the operation of the input/output ports or the internal peripheral functions of the microcomputer can be simulated as a means of debugging the target program. Furthermore, linked operation with an external tool can be realized by, for example, sending and receiving data to and from that tool.

Any desired I/O DLL can be created by using C/C++ language. To create an I/O DLL, you need to have Microsoft Visual C++, a Windows application development environment available on the market.

*1. DLL is the acronym of Dynamic Link Library. This is a function of the operating system that allows you to save executable routines (routines that supply a specific function or a set of functions) to be saved separately as a file with the extension ".dll". These routines are loaded only when they are needed by the calling program.