1 #include <stdio.h>
 2 #include "platform.h"
 3 #include "xparameters.h"
 4 #include "xgpio.h"
 5 #include "sleep.h"
 6 #include "platform.h"
 7 #include "xil_types.h"
 8 #include "xgpiops.h"
 9 
10 
11 /************************** Constant Definitions *****************************/
12 
13 /*
14  * The following constant maps to the name of the hardware instances that
15  * were created in the EDK XPS system.
16  */
17 #define XPAR_LEDS_ID XPAR_AXI_GPIO_0_BASEADDR  //AXI_GPIO_0 是添加的第一个 gpio 所以是 leds
18 #define XPAR_SWS_ID XPAR_AXI_GPIO_1_BASEADDR   //那么 这个自然是 开关了
19 
20 int main()
21 {
22     static XGpio LED_Ptr;//定义GPIO指针
23     static XGpio SWS_Ptr;
24     int XStatus;
25     int num = 0;
26     //初始化 LED
27     XStatus = XGpio_Initialize(&LED_Ptr,XPAR_AXI_GPIO_0_DEVICE_ID);
28     if(XST_SUCCESS != XStatus)
29             print("GPIO INIT FAILED\n\r");
30     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
31     XGpio_DiscreteWrite(&LED_Ptr, 1,0x00);
32 
33     //初始化 开关
34     XStatus = XGpio_Initialize(&SWS_Ptr,XPAR_AXI_GPIO_1_DEVICE_ID);
35     if(XST_SUCCESS != XStatus)
36             print("GPIO INIT FAILED\n\r");
37     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
38 
39 
40 
41     while(1){
42         num = XGpio_DiscreteRead(&SWS_Ptr, 1);  //从开关处 读数据
43         printf("Numb %d\n\r", num);
44         XGpio_DiscreteWrite(&LED_Ptr, 1,num);   //直接写入 led
45         usleep(1000);      //delay 1ms
46     }
47 
48     printf("end\n\r \n\r");
49     return 0;
50 }