PIC18F452的中断程序 请问PIC18F452的中断程序用c语言怎样写呢？18系列的pic单片机有两个中断向量入口地址

首先取决于你用的是什么编译器，pic18系列一般有两个，一个个hi-tech c compiler，一个是
c18.要是htc的这样写：
/******************************************************************************/
/* Interrupt Routines */
/******************************************************************************/

/* High-priority service */
void interrupt high_isr(void)
{

/* This code stub shows general interrupt handling. Note that these
conditional statements are not handled within 3 seperate if blocks.
Do not use a seperate if block for each interrupt flag to avoid run
time errors. */

#if 0

/* TODO Add High Priority interrupt routine code here. */

/* Determine which flag generated the interrupt */
if()
{
; /* Clear Interrupt Flag 1 */
}
else if ()
{
; /* Clear Interrupt Flag 2 */
}
else
{
/* Unhandled interrupts */
}

#endif

}

/* Low-priority interrupt routine */
void low_priority interrupt low_isr(void)
{

/* This code stub shows general interrupt handling. Note that these
conditional statements are not handled within 3 seperate if blocks.
Do not use a seperate if block for each interrupt flag to avoid run
time errors. */

#if 0

/* TODO Add Low Priority interrupt routine code here. */

/* Determine which flag generated the interrupt */
if()
{
; /* Clear Interrupt Flag 1 */
}
else if ()
{
; /* Clear Interrupt Flag 2 */
}
else
{
/* Unhandled interrupts */
}

#endif

}
c18的这样写，我这个不是PIC18f452，中断向量的地址可能不对，你对照下数据手册
/** I N T E R R U P T S V E C T O R *****************************************/

//------------------------------------------------------------------------------
// High priority interrupt vector
#pragma code InterruptVectorHigh = 0x08
void interrupt_at_InterruptVectorHigh (void)
{
_asm
GOTO InterruptServiceHigh
_endasm
}

//------------------------------------------------------------------------------
// Low priority interrupt vector
#pragma code InterruptVectorLow = 0x18
void interrupt_at_InterruptVectorLow (void)
{
_asm
GOTO InterruptServiceLow
_endasm
}

/** I N T E R R U P T S S E R V I C E S *************************************/

// -----------------------------------------------------------------------------
// High priority interrupt routine
#pragma interrupt InterruptServiceHigh
void InterruptServiceHigh(void)
{
// Check to see what caused the interrupt
// (Necessary when more than 1 interrupt at a priority level)

// Check for INT0 interrupt
#if 0

/* TODO Add High Priority interrupt routine code here. */

/* Determine which flag generated the interrupt */
if()
{
; /* Clear Interrupt Flag 1 */
}
else if ()
{
; /* Clear Interrupt Flag 2 */
}
else
{
/* Unhandled interrupts */
}

#endif
}

// -----------------------------------------------------------------------------
// Low priority interrupt routine
#pragma interruptlow InterruptServiceLow
void InterruptServiceLow(void)
{
/* This code stub shows general interrupt handling. Note that these
conditional statements are not handled within 3 seperate if blocks.
Do not use a seperate if block for each interrupt flag to avoid run
time errors. */

#if 0

/* TODO Add Low Priority interrupt routine code here. */

/* Determine which flag generated the interrupt */
if()
{
; /* Clear Interrupt Flag 1 */
}
else if ()
{
; /* Clear Interrupt Flag 2 */
}
else
{
/* Unhandled interrupts */
}

#endif
}
这些中断函数都要先声明