SDK代码记录

/******************************************************************************
*
* Copyright (C) 2009 - 2014 Xilinx, Inc.  All rights reserved.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/

/*
 * helloworld.c: simple test application
 *
 * This application configures UART 16550 to baud rate 9600.
 * PS7 UART (Zynq) is not initialized by this application, since
 * bootrom/bsp configures it to baud rate 115200
 *
 * ------------------------------------------------
 * | UART TYPE   BAUD RATE                        |
 * ------------------------------------------------
 *   uartns550   9600
 *   uartlite    Configurable only in HW design
 *   ps7_uart    115200 (configured by bootrom/bsp)
 */

/***************************** Include Files *********************************/
#include "xparameters.h"
#include "xgpio.h"
#include "platform.h"

/************************** Variable Defintions ******************************/
/* Instance For GPIO */
XGpio GpioOutput;

int main()
{
    u32 Delay;
    u32 Ledwidth;

    init_platform();

    print("Hello World\n\r");
    XGpio_Initialize(&GpioOutput, XPAR_AXI_GPIO_0_DEVICE_ID); //initialize GPIO IP
    XGpio_SetDataDirection(&GpioOutput, 1, 0x0); //set GPIO as output
    XGpio_DiscreteWrite(&GpioOutput, 1, 0x0); //set GPIO output value to 0

    while (1)
    {
        for (Ledwidth = 0x0; Ledwidth < 4; Ledwidth++)
        {
            XGpio_DiscreteWrite(&GpioOutput, 1, 1 << Ledwidth);
            for (Delay = 0; Delay < 8000000; Delay++);
            XGpio_DiscreteClear(&GpioOutput, 1, 1 << Ledwidth);
        }
    }
    cleanup_platform();
    return 0;
}