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microblaze gpio中断

2012-12-13 14:06:59| 分类：专业 | 标签： |举报 |字号大中小订阅

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#include "xparameters.h"
#include "xgpio_l.h"
#include "xintc.h"
#include "xgpio.h"

XIntc intc;
XGpio push_buttons;

int intc_cnt = 0;

void button_int_handler( void * basedder_p)
{
    xil_printf("Push_button interrupt occured %d .\r\n", intc_cnt++);
    XGpio_WriteReg(XPAR_LEDS_BASEADDR,1,~intc_cnt);
    XGpio_InterruptClear(&push_buttons, 0xFFFF);
    XIntc_Acknowledge(&intc,XPAR_INTC_0_GPIO_1_VEC_ID);
}

void delay(int cnt)
{
    int i,j;
    for(i=0;i<cnt;i++)
        for(j=0;j<256;j++);
}

XStatus gpio_irq_init(void)
{
    XStatus Status;
    // initialize gpio
    XGpio_Initialize(&push_buttons, XPAR_PUSH_BUTTONS_DEVICE_ID);
    XGpio_SetDataDirection(&push_buttons, 1, 0xFFFF); //set input
    XGpio_InterruptEnable(&push_buttons, 0xFFFF); //
    XGpio_InterruptGlobalEnable(&push_buttons);

    // initialize Interrupt controller
    Status = XIntc_Initialize(&intc, (Xuint16)XPAR_INTC_0_DEVICE_ID);
    if (Status != XST_SUCCESS)
    {    return XST_FAILURE;    }
    Status = XIntc_SelfTest(&intc);
    if (Status != XST_SUCCESS)
    {    return XST_FAILURE;    }
    Status = XIntc_Connect(&intc, XPAR_INTC_0_GPIO_1_VEC_ID, (XInterruptHandler)button_int_handler, &push_buttons);
    if (Status != XST_SUCCESS)
    {    return XST_FAILURE;}
    Status = XIntc_Start(&intc, XIN_REAL_MODE);
    if (Status != XST_SUCCESS)
    {    return XST_FAILURE; }
    XIntc_Enable(&intc, XPAR_INTC_0_GPIO_1_VEC_ID);
    microblaze_enable_interrupts();

    return XST_SUCCESS;
}

int main (void)
{
    char m;
    //HSB:LSB <--> D7:D14, 置0灯亮置1灯灭
    for(m=0;m<8;m++)
    {
        XGpio_WriteReg(XPAR_LEDS_BASEADDR,1,~(1<<m));
        delay(10000);
    }

    gpio_irq_init();

    xil_printf("Push_button interrupt test start...\r\n");

    while(1)
    {
    }
}

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