MATLAB XPC TARGET 4 - API GUIDE Guia do Utilizador descarregar pdf (Página 231)

Advanced Troubleshooting

12-23

• http://www.mathworks.com/support/solutions/data/31528.html

• Existing xPC Target device driver source code. Refer to the following

directory:

MATLABROOT\toolbox\rtw\targets\xpc\target\build\xpcblocks

• In the include directory of the device driver source code area, pay particular

attention to the following files:

io_xpcimport.h

- pci_xpcimport.h

- time_xpcimport.h

Before you consider writing custom device drivers for the xPC Target system,

you should possess

• Good C programming skills

• Knowledge of writing S-functions and compiling those functions as C-MEX

functions

• Knowledge of SimStruct, a MATLAB Simulink C language header file that

defines the Simulink data structure and the SimStruct access macros. It

encapsulates all the data relating to the model or S-function, including block

parameters and outputs.

• An excellent understanding of the I/O hardware. Because of the real-time

nature of xPC Target, you must develop drivers with minimal latency. And

since most drivers access the I/O hardware at the lowest possible level

(register programming), you must have a good understanding of how to

control the board with register information. Indirectly, this means that you

must have access to the register-level programming manual for the device.

• A good knowledge of port and memory I/O access over various buses. You

need this information to access I/O hardware at the register level.

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MATLAB XPC TARGET 4 - API GUIDE Guia do Utilizador Página 231