Zedboard不同GPIO形式 控制OLED顯示

參考鏈接：
1. http://blog.chinaaet.com/yyiyy/p/39029# 從0開始學Zedboard（3）GPIO控制OLED
2. http://blog.chinaaet.com/carlpc/p/39775# GPIO控制–MIO和EMIO的使用(VIVADO+PS+PL)
3. http://blog.chinaaet.com/cuter521/p/35978 Vivado的嵌入式開發 ——PS+PL實踐
4. http://blog.csdn.net/shangguanyunlan/article/details/53222673 使用vivado進行zedboard的OLED測試（創建IP核）

這次實驗，利用AXI_GPIO連接BTNR，PS通過EMIO連接BTNU，通過PS GPIO連接BTN8、BTN9，對三種方式的GPIO均進行了控制演示。如果沒有做過OLED的測試，建議先進行參考鏈接4.

利用PS_GPIO、AXI_GPIO、EMIO分別控制OLED來顯示不同的頁面。
首先是建立VIVADO工程。OLEDIP核建立參考鏈接4，裏面有詳盡的說明。按照下圖建立工程。(裏面部分內容參考鏈接2.4)
1.vivado硬件設計如下：

2.添加自己已經創建的IP核（沒有，就自己創建，步驟參考鏈接4）
在vivado中，添加IP視圖空白處，右鍵選擇IP Setting

打開對話框後，點擊IP Repositories的+號，找到之前創建的IP核地址（倉庫），點擊添加後，IP核自動出現，如下圖：

3.I/O口約束文件配置如下：

4.板子效果：

5.主函數：

/*
 * main.c
 */


#include <stdio.h>
#include "platform.h"
#include "xil_types.h"
#include "xgpio.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "xil_io.h"
#include "oled.h"
//extern char inbyte(void);//調用inbyte接收一個字節輸入函數
extern XGpioPs_Config XGpioPs_ConfigTable[XPAR_XGPIOPS_NUM_INSTANCES];
//int
main()
{
  static XGpioPs psGpioInstancePtr;
  XGpioPs_Config*GpioConfigPtr;
  static XGpio GPIOInstance_Ptr;

  int xStatus,start,end;
  u32 Readstatus1,Readstatus2;
  int iPinNumberld9 = 7;  /*Ld9 is connected to MIO pin 7*/
  int iPinNumberbtn8 = 50;/*Btn8 is connected to MIO pin 50*/
  int iPinNumberbtn9 = 51;/*Btn9 is connected to MIO pin 51*/
  int iPinNumberBTNU = 54;/*BTNU is connected to EMIO pin 54*/
  init_platform();
  print("##### Application Starts #####\n\r");

  print("\r\n");

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-1 :AXI GPIO Initialization

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  #define XPAR_AXI_GPIO_0_DEVICE_ID 0//因爲沒有報錯的錯誤，自己添加的define
  xStatus = XGpio_Initialize(&GPIOInstance_Ptr,XPAR_AXI_GPIO_0_DEVICE_ID);

  if(XST_SUCCESS != xStatus)

    print("GPIO INIT FAILED\n\r");

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-2 :AXI GPIO Set the Direction

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  XGpio_SetDataDirection(&GPIOInstance_Ptr, 1, 1);//input

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-3 :PS GPIO Intialization

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  GpioConfigPtr = XGpioPs_LookupConfig(XPAR_PS7_GPIO_0_DEVICE_ID);

  if(GpioConfigPtr == NULL)

    return XST_FAILURE;

  xStatus = XGpioPs_CfgInitialize(&psGpioInstancePtr,

      GpioConfigPtr,

      GpioConfigPtr->BaseAddr);

  if(XST_SUCCESS != xStatus)

    print(" PS GPIO INIT FAILED \n\r");

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-4 :PS GPIO pin setting to Output

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  XGpioPs_SetDirectionPin(&psGpioInstancePtr, iPinNumberld9,1);

  XGpioPs_SetOutputEnablePin(&psGpioInstancePtr, iPinNumberld9,1);

  XGpioPs_SetDirectionPin(&psGpioInstancePtr, iPinNumberbtn8,0);

  XGpioPs_SetOutputEnablePin(&psGpioInstancePtr, iPinNumberbtn8,1);

  XGpioPs_SetDirectionPin(&psGpioInstancePtr, iPinNumberbtn9,0);

  XGpioPs_SetOutputEnablePin(&psGpioInstancePtr, iPinNumberbtn9,1);

  XGpioPs_SetDirectionPin(&psGpioInstancePtr, iPinNumberBTNU,0);

  XGpioPs_SetOutputEnablePin(&psGpioInstancePtr, iPinNumberBTNU,1);

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-5 :OLED Intialization

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  OLED_Init();

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  //Step-6 :press btn8 to start Demo

  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  OLED_ShowString(0,0, "BTN8 to start");

  OLED_Refresh_Gram();



  while (1){

start=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn8);

if(start){

XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,1);

print("###################### Demo Starts ########################\r\n");

OLED_ShowString(0,0, "zed is good");

OLED_ShowString(0,16, "BTNR to go on");

OLED_Refresh_Gram();

break;

     }

end=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn9);

if(end){

XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,0);

OLED_Clear();

break;

  }

  }



  while(1){

 Readstatus1 = XGpio_DiscreteRead(&GPIOInstance_Ptr, 1) ;//讀BTNR

 if(Readstatus1){

 OLED_ShowString(0,0, "zed is girl");

 OLED_ShowString(0,16, "BTNU to go on");

 OLED_Refresh_Gram();

 break;

 }

  }

  while(1){

 Readstatus2 = XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberBTNU) ;//讀BTNU

   if(Readstatus2){

   OLED_Clear();

   OLED_ShowString(0,0, "glad to see you");

   OLED_ShowString(0,16, "BTN9 to end");

   OLED_Refresh_Gram();




   }

   end=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn9);

   if(end){

   XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,0);

   OLED_Clear();

   break;

      }

  }

  print("\r\n");
  print("***********\r\n");
  print("BYE \r\n");
  print("***********\r\n");
  cleanup_platform();
  return 0;
}

送自己一朵小花~~♪(^∇^*)