zedboard做流水灯代码

/*

* MD.c

*

* Created on: 2015年7月16日

* Author: Administrator

*/

/*

* LEDwc.c

*

* Created on: 2015年7月16日

* Author: Administrator

*/

#include"xparameters.h"/* Peripheral parameters */

#include"xgpio.h"/* GPIO data struct and APIs */

#include"xil_printf.h"

#include"xil_cache.h"

#define GPIO_BITWIDTH 8/* This is the width of the GPIO */

#define GPIO_DEVICE_ID XPAR_AXI_GPIO_0_DEVICE_ID//device id

#define LED_DELAY 10000000/* times delay*/

#define LED_MAX_BLINK 0x1/* Number of times the LED Blinks */

#define LED_CHANNEL 1/* GPIO channel*/

#define printf xil_printf /* A smaller footprint printf */

XGpio Gpio; /* The Instance of the GPIO Driver */

XGpio GpioOutput; /* The driver instance for GPIO Device configured as O/P */

int GpioMarquee (u16 DeviceId, u32 GpioWidth)

{

//volatileint

int Delay;

//int Delay;

u32 LedBit;

u32 LedLoop;

int Status;

/*

* Initialize the GPIO driver so that it's ready to use,

* specify the device ID that is generated in xparameters.h

*/

Status = XGpio_Initialize(&GpioOutput, DeviceId);

if (Status != XST_SUCCESS) {

return XST_FAILURE;

}

//Set the direction for all signals to be outputs

XGpio_SetDataDirection(&GpioOutput, LED_CHANNEL, 0x0);

// Set the GPIO outputs to low

XGpio_DiscreteWrite(&GpioOutput, LED_CHANNEL, 0x0);

for (LedBit = 0x0; LedBit < GpioWidth; LedBit++) {

for (LedLoop = 0; LedLoop < LED_MAX_BLINK; LedLoop++) {

//Set the GPIO Output to High

XGpio_DiscreteWrite(&GpioOutput, LED_CHANNEL,

1 << LedBit);

//Wait a small amount of time so the LED is visible

for (Delay = 0; Delay < LED_DELAY; Delay++);

//Clear the GPIO Output

XGpio_DiscreteClear(&GpioOutput, LED_CHANNEL,

1 << LedBit);

// Wait a small amount of time so the LED is visible

for (Delay = 0; Delay < LED_DELAY; Delay++);

}

}

return XST_SUCCESS;

}

main(void)//把main前面的int去掉了。

{//Application start

/* loop forever*/

while(1){

u32 status;

status = GpioMarquee (GPIO_DEVICE_ID,GPIO_BITWIDTH);

if (status == 0)

printf("SUCESS!.\r\n");

else printf("FAILED.\r\n");

}

return XST_SUCCESS;

}