ZedBoard教程PS篇(3):MIO的使用

原创已于 2023-12-11 18:23:32 修改 · 1.1k 阅读

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#fpga开发

于 2022-07-28 21:54:52 首次发布

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该博客介绍了如何在Zynq Zedboard上使用Vivado 2017.4进行FPGA开发，通过配置MIO管脚MIO7来点亮PS端的LED灯。步骤包括新建工程、调用Zynq核、配置GPIO、生成综合文件、生成顶层文件、生成bit文件，并在SDK中创建FSBL和hello_world应用项目。最后，提供了MIO的C代码实现LED灯的开关操作。

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开发板环境：vivado2017.4

开发板：Zedboard 芯片型号：xc7z020clg484-1

在zynq中分为MIO和EMIO，MIO是arm端的管脚，而EMIO是将arm端的管脚使用fpga管脚来进行扩展，本章主要使用MIO来点亮LED灯

从上图中可以看到MIO0~MIO53一共54个管脚，EMIO0~EMIO63一共64个管脚，下面开始新建工程，新建一共mio_led工程（如果不会新建请参考hello_world这章）

新建工程后，调用zynq核

导入配置文件mio.tcl

配置后可以看到GPIO项里面有MIO7(使用这个管脚点亮PS端的led)

生成综合文件

生成顶层文件

生成bit文件

生成bit文件成功

导出硬件配置

File-->Launch SDK打开SDK

点击New-->application Project新建fsbl

新建fsbl，点击Next

选择Zynq FSBL，点击Finish

新建的fsbl

再次点击New-->application Project，新建一个hello_world工程

新建hello_world工程，点击Next

选择Hello World工程模板，点击Finish

新建的hello_world工程

硬件连接

MIO代码

/******************************************************************************
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/*
 * helloworld.c: simple test application
 *
 * This application configures UART 16550 to baud rate 9600.
 * PS7 UART (Zynq) is not initialized by this application, since
 * bootrom/bsp configures it to baud rate 115200
 *
 * ------------------------------------------------
 * | UART TYPE   BAUD RATE                        |
 * ------------------------------------------------
 *   uartns550   9600
 *   uartlite    Configurable only in HW design
 *   ps7_uart    115200 (configured by bootrom/bsp)
 */

#include <stdio.h>
#include "platform.h"
#include "xil_printf.h"
#include "xil_io.h"
#include "sleep.h"


#define	Base_Address		0xE000A000

#define	DIRM_0				0x00000204 //mio0~mio31

#define	OEN_0				0x00000208 //mio0~mio31

#define	MASK_DATA_0_LSW		0x00000000 //mio0~mio15  data


int main()
{

	Xil_Out32(Base_Address + DIRM_0,0x00000080); //端口方向设置 (0为输入    1为输出)
	Xil_Out32(Base_Address + OEN_0,0x00000080);	 //管脚使能

	while(1)
	{
		Xil_Out32(Base_Address + MASK_DATA_0_LSW,0x00000080);
		sleep(1);
		Xil_Out32(Base_Address + MASK_DATA_0_LSW,0x00000000);
		sleep(1);
	}


}

使用SD卡启动，点亮MIO7(如果使用多个mio管脚，为了不干扰其它的管脚，最好先取值然后相或相应的位)