【转载】zedboard中PL_GPIO控制（8个sw、8个leds）

【原文链接】：http://blog.chinaaet.com/yyiyy/p/39024#

PL端GPIO控制，利用zed上的8个开关去控制8个led灯的亮灭，利用btn8和btn9两个PS按键控制Demo的开始和结束，并通过LD9显示程序是否开始。

VIVADO工程如图1所示，用两个AXI_GPIO IP核分别连接LED和SW，工程建立全部使用自动连接。

硬件设计图如下：



自动生成的约束文件：



SDK创建完毕后：

连接串口和JTAG，运行程序，点击btn8开始Demo，LD9灯两，尝试拨动开关，看看led灯的反应，点击btn9结束Demo，LD9灯灭。

程序：

#include <stdio.h>
#include "platform.h"
#include "xil_types.h"
#include "xgpio.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "xil_io.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_Ptr0;
static XGpio GPIOInstance_Ptr1;
int xStatus0,xStatus1,xStatus,start,end;
u32 Readstatus;
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*/
init_platform();
print("##### Application Starts #####\n\r");
print("\r\n");
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//Step-1 :AXI GPIO Initialization
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xStatus0 = XGpio_Initialize(&GPIOInstance_Ptr0,XPAR_AXI_GPIO_0_DEVICE_ID);
if(XST_SUCCESS != xStatus0)
print("GPIO INIT FAILED\n\r");
xStatus1 = XGpio_Initialize(&GPIOInstance_Ptr1,XPAR_AXI_GPIO_1_DEVICE_ID);
if(XST_SUCCESS != xStatus1)
print("GPIO INIT FAILED\n\r");
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//Step-2 :AXI GPIO Set the Direction
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XGpio_SetDataDirection(&GPIOInstance_Ptr0, 1,0x00);
XGpio_SetDataDirection(&GPIOInstance_Ptr1, 1,0xff);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//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);
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//Step-5 :press btn8 to start and btn9 to end
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
while (1){
start=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn8);
if(start){
XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,1);
print("###################### Demo Starts ########################\r\n");
break;
}
end=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn9);
if(end){
XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,0);
XGpio_DiscreteWrite(&GPIOInstance_Ptr0,1,0x00);break;
}
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//Step-6 :connect switch(8bit) to led(8bit)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
while(1){
Readstatus = XGpio_DiscreteRead(&GPIOInstance_Ptr1, 1) ;
XGpio_DiscreteWrite(&GPIOInstance_Ptr0,1,Readstatus);
end=XGpioPs_ReadPin(&psGpioInstancePtr, iPinNumberbtn9);
if(end){
XGpioPs_WritePin(&psGpioInstancePtr,iPinNumberld9,0);
XGpio_DiscreteWrite(&GPIOInstance_Ptr0,1,0x00);break;
}
}
print("\r\n");
print("***********\r\n");
print("BYE \r\n");
print("***********\r\n");
cleanup_platform();
return 0;
}