Renesas 70 Manual De Usuario

Chapter 5 Detailed Applications

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5.1.2

Writing a Kernel (OS Dependent) Interrupt Handler

When describing the kernel (OS-dependent) interrupt handler in C language, observe the following precautions.

1. Describe the kernel(OS-dependent) interrupt handler as a function

2. Be sure to use the void type to declare the interrupt handler start function return value and

argument.

3. At the beginning of file, be sure to include "itron.h",”kernel.h” which is in the system di-

rectory as well as "kernel_id.h" which is in the current directory.

4. Do not use the ret_int service call in the interrupt handler.

5. The static declared functions can not be registered as an interrupt handler.

#include

<itron.h>

#include

<kernel.h>

#include "kernel_id.h"

void inthand(void)

{

/* process */

iwup_tsk(ID_main);

}

Figure 5.3 Example of Kernel(OS-dependent) Interrupt Handler

A configuration file is used to define the relationship between handlers and functions.

When an kernel(OS-dependent) interrupt handler is declared with #pragma INTHANDLER ,code for the ret_int service call is automati-

cally generated.