ext_irq.c

AT91SAM7X系ARM系统开发功能测试程序,如果你着手用AT91SAM来进行系统开发,这是确实是个很好的资料,有了他,会助你一臂之力.本源码是ADS1.2下的源码,用于AIC功能测试

//*----------------------------------------------------------------------------
//* 文件名  : ext_irq.c
//* 创建人  :张正锋 2006/2/21  [e-mail]
//*----------------------------------------------------------------------------

// Include Standard LIB  files
#include "project.h"

int status_irq = 0 ;

//*----------------------------------------------------------------------------
//* 函数名           : at91_IRQ0_handler
//* 功能             : Irq Handler called by the IRQ0 interrupt with AT91 compatibility
//* 输入参数         : none
//* 返回值           : none
//* 创建人           :张正锋 2006/2/21  [e-mail]
//*----------------------------------------------------------------------------
void at91_IRQ0_handler(void)
{
    if (status_irq == 0) status_irq = 1;
    else status_irq = 0 ;
    //* Read the output state
    if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOB) & AT91B_LED1 ) == AT91B_LED1)
    {
        AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, AT91B_LED1 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91C_BASE_PIOB, AT91B_LED1 );
    }
    //* while SW1 is push loop
    while ( (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & AT91A_SW1 ) != AT91A_SW1);
}

//*----------------------------------------------------------------------------
//* 函数名          : FIQ_init_handler
//* 功能            : Irq Handler called by the FIQ interrupt with AT91  compatibility
//* 输入参数         : none
//* 返回值           : none
//* 创建人           :张正锋 2006/2/21  [e-mail]
///*----------------------------------------------------------------------------
 void FIQ_init_handler(void)
{

  // Read the output state
    if ( (AT91F_PIO_GetInput(AT91C_BASE_PIOB) & AT91B_LED2 ) == AT91B_LED2 )
    {
        AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, AT91B_LED2 );
    }
    else
    {
        AT91F_PIO_SetOutput( AT91C_BASE_PIOB, AT91B_LED2 );
    }

}