zedboard 8路拨码开关

源代码

#include <stdio.h>
#include "platform.h"
#include "xparameters.h"
#include "xgpio.h"
#include "sleep.h"
#include "platform.h"
#include "xil_types.h"
#include "xgpiops.h"


/************************** Constant Definitions *****************************/


/*
 * The following constant maps to the name of the hardware instances that
 * were created in the EDK XPS system.
 */
#define XPAR_LEDS_ID    XPAR_AXI_GPIO_0_BASEADDR//AXI_GPIO_0 是添加的第一个 gpio 所以是 leds
#define XPAR_SWS_ID XPAR_AXI_GPIO_1_BASEADDR   //那么 这个自然是 开关了


//int
main()
{
    static XGpio LED_Ptr;//定义GPIO指针
    static XGpio SWS_Ptr;
    int XStatus;
    int num = 0;
    //初始化 LED
    XStatus = XGpio_Initialize(&LED_Ptr,XPAR_AXI_GPIO_0_DEVICE_ID);
    if(XST_SUCCESS != XStatus)
            print("GPIO INIT FAILED\n\r");
    XGpio_SetDataDirection(&LED_Ptr, 1,0x00);//通道1；设置方向 0 输出 1输入, 0x00表示8位都是输出
    XGpio_DiscreteWrite(&LED_Ptr, 1,0x00);


    //初始化 开关
    XStatus = XGpio_Initialize(&SWS_Ptr,XPAR_AXI_GPIO_1_DEVICE_ID);
    if(XST_SUCCESS != XStatus)
            print("GPIO INIT FAILED\n\r");
    XGpio_SetDataDirection(&SWS_Ptr, 1,0xFF);//通道1；设置方向 0 输出 1输入 0xFF表示8位都是输入






    while(1){
        num = XGpio_DiscreteRead(&SWS_Ptr, 1);  //从开关处 读数据
        printf("Numb %d\n\r", num);
        XGpio_DiscreteWrite(&LED_Ptr, 1,  num);
        // @param Channel contains the channel of the GPIO (1 or 2) to operate on.
      //  XGpio_DiscreteWrite(&LED_Ptr, 1,num);   //直接写入 led
        usleep(1000000);      //delay 1ms


    }


    printf("end\n\r \n\r");
   // return 0;
}