zedboard中OLED源代码

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#蓝桥杯 #职场和发展

于 2015-07-21 17:03:33 首次发布

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本文介绍了一个基于嵌入式系统的程序设计案例，通过初始化和配置GPIO（通用输入输出）接口来实现对外部按钮的监测及OLED屏幕的文字显示功能。文章详细展示了从初始化GPIO到监测按钮状态并据此更新OLED屏幕内容的完整流程。

#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);//调用inbyte接收一个字节输入函数
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//因为没有报错的错误，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, "DALE I LOVE U");

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) ;//读BTNR

 if(Readstatus1){

 OLED_ShowString(0,0, "DO U LOVE ME ?");

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

 OLED_Refresh_Gram();

 break;

 }

  }

  while(1){

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

   if(Readstatus2){

   OLED_Clear();

   OLED_ShowString(0,0, "HAHA BYE");

   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;

}