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;
}