深入浅出FPGA-16-xilinx_zynq7000_EPP上一个简单实验(PS) 实验目的, design, 嵌入式, Board, 工程

pengpengpang

现在的FPGA都很强大了，不仅有丰富的LE（LC），高端的还集成了CPUcore。这样，从硬件上就能做SOC，从软件上可以做嵌入式。本节就做一个简单的实验，主要熟悉这个板子的PS资源。15.1 实验目的1》  熟悉zynq7000 EPP资源和design suite2》 SDK编码，实现一个简单逻辑。15.2  实验环境Board ：ZYNQ7000 EPPDevice：XC7Z020CLG484ACX1221Design suite：14.1 （PlanAhead+XPS+SDK）15.3  实验准备a)        会planAhead创建工程b)        简单了解和使用XPS和SDK15.4 实验内容a)        在XPS添加GPIO，此GPIO连到外部一个LED上。b)        在SDK编写C代码控制GPIO来控制此LED的闪烁。15.5 实验步骤a)        打开planAhead，创建embedded新工程，添加PS7。b)        打开XPS，添加GPIO。注意port名称，ucf文件里要用。c)        添加UCF文件，内容：simple_led.ucf。d)        Create TOP HDL，然后生成bitstream。e)         导出hardware，launch SDK。f)         在SDK里创建helloword工程。g)        SDK编码，内容：helloworld.c。h)        Program FPGAi)          Run AS,configurej)          Run15.6 实验结果看板子，DS18这个led会闪烁。下图是串口打印信息：可以看到，可以通过软件来控制GPIO，就像在单片机上开发一样。附：SDK 代码：[html] view plaincopyprint?

• /*
• * Copyright (c) 2009 Xilinx, Inc.  All rights reserved.
• *
• * Xilinx, Inc.
• * XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A
• * COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
• * ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR
• * STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION
• * IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE
• * FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.
• * XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO
• * THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO
• * ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE
• * FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY
• * AND FITNESS FOR A PARTICULAR PURPOSE.
• *
• */
• /*
• * helloworld.c: simple test application
• */
• #include <stdio.h>
• #include "platform.h"
• #include "../../hello_world_bsp_0/ps7_cortexa9_0/include/xgpio.h"
• #include "../../hello_world_bsp_0/ps7_cortexa9_0/include/xparameters.h"
• #define MY_GPIO_DEVICE_ID XPAR_AXI_GPIO_0_DEVICE_ID
• void my_process(void);
• void led_flash(XGpio* led_p,unsigned int time,int count);
• void my_delay(int times);
• int main()
• {
•     init_platform();
•     my_process();
•     printf("my_process end!\r\n");
•     cleanup_platform();
•     return 0;
• }
• //==========================
• void my_process(void)
• {
•     XGpio led;
•     int ret = 0;
•     int read_led = 0;
•     printf("my_process start...\n");
•     ret = XGpio_Initialize(&led,MY_GPIO_DEVICE_ID);//led init
•     if(0 != ret)
•     {
•         printf("led init error:%d\n",ret);
•     }
•     else
•     {
•         printf("led init ok!%d \n\n",ret);
•     }
•     XGpio_SetDataDirection(&led,1,0x00000000);
•     printf("setdir: input!\n\n");
•     led_flash(&led,0xffffff,100);
• #if 0
•     read_led = XGpio_DiscreteRead(&led,1);//init read
•     printf("before led read:%d\n\n",read_led);
•     XGpio_DiscreteWrite(&led,1,0);//write 0
•     printf("write 0!\n\n\n");
•     read_led = XGpio_DiscreteRead(&led,1);//read again
•     printf("led read:%d\n\n",read_led);
•     XGpio_DiscreteWrite(&led,1,1);//write 1
•     printf("write 1!\n\n\n");
•     read_led = XGpio_DiscreteRead(&led,1);//read again
•     printf("led read:%d\n\n",read_led);
• #endif
•     return;
• }
• void my_delay(int times)
• {
•     while(times--)
•     {
•         ;//do nothing.
•     }
• }
• void led_flash(XGpio* led_p,unsigned int time,int count)
• {
•     int loop = 0;
•     for(loop=0;loop<count;loop++)
•     {
•         XGpio_DiscreteWrite(led_p,1,1);//write 0
•         my_delay(time);
•         XGpio_DiscreteWrite(led_p,1,0);//write 0
•         my_delay(time);
•     }
• }

来源：rill_zhen的专栏