开发板环境：vivado 2017.1 ，开发板型号xc7z020clg400-1，这个工程主要是用i2c对24c32进行读写
链接：https://pan.baidu.com/s/1EjVY9kjybUKg3oegKkx2BA 提取码：dgcm
Step1 新建工程然后按照下面截图中进行配置（主要配置了DDR、i2c）
配置完成后进行综合、生成顶层文件，生成的顶层文件如下图所示
//Copyright 1986-2017 Xilinx, Inc. All Rights Reserved. //-------------------------------------------------------------------------------- //Tool Version: Vivado v.2017.1 (win64) Build 1846317 Fri Apr 14 18:55:03 MDT 2017 //Date : Sun Feb 18 22:06:05 2018 //Host : MS-20180107KQQK running 64-bit Service Pack 1 (build 7601) //Command : generate_target design_1_wrapper.bd //Design : design_1_wrapper //Purpose : IP block netlist //-------------------------------------------------------------------------------- `timescale 1 ps / 1 ps module design_1_wrapper (DDR_addr, DDR_ba, DDR_cas_n, DDR_ck_n, DDR_ck_p, DDR_cke, DDR_cs_n, DDR_dm, DDR_dq, DDR_dqs_n, DDR_dqs_p, DDR_odt, DDR_ras_n, DDR_reset_n, DDR_we_n, FIXED_IO_ddr_vrn, FIXED_IO_ddr_vrp, FIXED_IO_mio, FIXED_IO_ps_clk, FIXED_IO_ps_porb, FIXED_IO_ps_srstb, iic_0_scl_io, iic_0_sda_io); inout [14:0]DDR_addr; inout [2:0]DDR_ba; inout DDR_cas_n; inout DDR_ck_n; inout DDR_ck_p; inout DDR_cke; inout DDR_cs_n; inout [3:0]DDR_dm; inout [31:0]DDR_dq; inout [3:0]DDR_dqs_n; inout [3:0]DDR_dqs_p; inout DDR_odt; inout DDR_ras_n; inout DDR_reset_n; inout DDR_we_n; inout FIXED_IO_ddr_vrn; inout FIXED_IO_ddr_vrp; inout [53:0]FIXED_IO_mio; inout FIXED_IO_ps_clk; inout FIXED_IO_ps_porb; inout FIXED_IO_ps_srstb; inout iic_0_scl_io; inout iic_0_sda_io; wire [14:0]DDR_addr; wire [2:0]DDR_ba; wire DDR_cas_n; wire DDR_ck_n; wire DDR_ck_p; wire DDR_cke; wire DDR_cs_n; wire [3:0]DDR_dm; wire [31:0]DDR_dq; wire [3:0]DDR_dqs_n; wire [3:0]DDR_dqs_p; wire DDR_odt; wire DDR_ras_n; wire DDR_reset_n; wire DDR_we_n; wire FIXED_IO_ddr_vrn; wire FIXED_IO_ddr_vrp; wire [53:0]FIXED_IO_mio; wire FIXED_IO_ps_clk; wire FIXED_IO_ps_porb; wire FIXED_IO_ps_srstb; wire iic_0_scl_i; wire iic_0_scl_io; wire iic_0_scl_o; wire iic_0_scl_t; wire iic_0_sda_i; wire iic_0_sda_io; wire iic_0_sda_o; wire iic_0_sda_t; design_1 design_1_i (.DDR_addr(DDR_addr), .DDR_ba(DDR_ba), .DDR_cas_n(DDR_cas_n), .DDR_ck_n(DDR_ck_n), .DDR_ck_p(DDR_ck_p), .DDR_cke(DDR_cke), .DDR_cs_n(DDR_cs_n), .DDR_dm(DDR_dm), .DDR_dq(DDR_dq), .DDR_dqs_n(DDR_dqs_n), .DDR_dqs_p(DDR_dqs_p), .DDR_odt(DDR_odt), .DDR_ras_n(DDR_ras_n), .DDR_reset_n(DDR_reset_n), .DDR_we_n(DDR_we_n), .FIXED_IO_ddr_vrn(FIXED_IO_ddr_vrn), .FIXED_IO_ddr_vrp(FIXED_IO_ddr_vrp), .FIXED_IO_mio(FIXED_IO_mio), .FIXED_IO_ps_clk(FIXED_IO_ps_clk), .FIXED_IO_ps_porb(FIXED_IO_ps_porb), .FIXED_IO_ps_srstb(FIXED_IO_ps_srstb), .IIC_0_scl_i(iic_0_scl_i), .IIC_0_scl_o(iic_0_scl_o), .IIC_0_scl_t(iic_0_scl_t), .IIC_0_sda_i(iic_0_sda_i), .IIC_0_sda_o(iic_0_sda_o), .IIC_0_sda_t(iic_0_sda_t)); IOBUF iic_0_scl_iobuf (.I(iic_0_scl_o), .IO(iic_0_scl_io), .O(iic_0_scl_i), .T(iic_0_scl_t)); IOBUF iic_0_sda_iobuf (.I(iic_0_sda_o), .IO(iic_0_sda_io), .O(iic_0_sda_i), .T(iic_0_sda_t)); endmodule这个i2c工程的管脚是用emio引出的，所以要加这两个IOBUF,如果是mio引出的可以不加这两个IOBUF
IOBUF iic_0_scl_iobuf
IOBUF iic_0_sda_iobuf
Step2 新建一个xdc文件
set_property PACKAGE_PIN B19 [get_ports iic_0_sda_io] set_property PACKAGE_PIN A20 [get_ports iic_0_scl_io] set_property IOSTANDARD LVCMOS33 [get_ports iic_0_scl_io] set_property IOSTANDARD LVCMOS33 [get_ports iic_0_sda_io] set_property PULLUP true [get_ports iic_0_scl_io] set_property PULLUP true [get_ports iic_0_sda_io]新建的工程因为是emio引出的所以要分配管脚，如果mio就不用分配引脚。
这个xdc文件主要注意下面这两行，这两行主要是加内部上拉电阻
set_property PULLUP true [get_ports iic_0_scl_io] set_property PULLUP true [get_ports iic_0_sda_io]Step3 生成bit文件
Step4点击菜单栏上的 File->Export->Export Hardware 导出硬件配置文件
Step5 打开SDK，然后新建一个fsbl
点击Next
点击Finish
Step 6 新建一个hello_world模板工程
新建完成后如下图所示
下面是hello_world的主程序这里是写入16位起始地址0x00进行连续写和读
/****************************************************************************** * * Copyright (C) 2009 - 2014 Xilinx, Inc. All rights reserved. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * Use of the Software is limited solely to applications: * (a) running on a Xilinx device, or * (b) that interact with a Xilinx device through a bus or interconnect. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Except as contained in this notice, the name of the Xilinx shall not be used * in advertising or otherwise to promote the sale, use or other dealings in * this Software without prior written authorization from Xilinx. * ******************************************************************************/ /* * 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 "sleep.h" #include "xiicps.h" XIicPs IicInstance; /* The instance of the IIC device. */ #define IIC_DEVICE_ID XPAR_XIICPS_0_DEVICE_ID u8 WriteBuffer[2 + 1]; u8 ReadBuffer[1]; /* Read buffer for reading a page. */ struct sensor_register { u8 value; }; static const struct sensor_register i2c_data[] = { { 0x00}, { 0x00}, { 0x04}, { 0x01}, { 0x11}, { 0x02}, { 0x3a}, { 0x70}, { 0x17}, { 0x98}, { 0x08}, { 0x65}, { 0x04}, { 0x70}, { 0x01}, { 0xff},/* over */ }; int iic_master_init(void) { int Status; XIicPs_Config *ConfigPtr; /* Pointer to configuration data */ ConfigPtr = XIicPs_LookupConfig(IIC_DEVICE_ID); if (ConfigPtr == NULL) { return XST_FAILURE; } Status = XIicPs_CfgInitialize(&IicInstance, ConfigPtr, ConfigPtr->BaseAddress); if (Status != XST_SUCCESS) { return XST_FAILURE; } XIicPs_SetSClk(&IicInstance, 400000); return XST_SUCCESS; } int iic_write_read_8(u8 Device_Address,u8 First_Word_Address,u8 Second_Word_address,u8 data) { int Status; WriteBuffer[0] = First_Word_Address; WriteBuffer[1] = Second_Word_address; WriteBuffer[2] = data; Status = XIicPs_MasterSendPolled(&IicInstance, WriteBuffer, 3, Device_Address>>1); if (Status != XST_SUCCESS) { return XST_FAILURE; } while (XIicPs_BusIsBusy(&IicInstance)); usleep(2500); if (Status != XST_SUCCESS) { return XST_FAILURE; } WriteBuffer[0] = First_Word_Address; WriteBuffer[1] = Second_Word_address; Status = XIicPs_MasterSendPolled(&IicInstance, WriteBuffer, 2, Device_Address>>1); if (Status != XST_SUCCESS) { return XST_FAILURE; } while (XIicPs_BusIsBusy(&IicInstance)); usleep(2500); Status = XIicPs_MasterRecvPolled(&IicInstance, ReadBuffer, 1, Device_Address>>1); if (Status != XST_SUCCESS) { return XST_FAILURE; } while (XIicPs_BusIsBusy(&IicInstance)); xil_printf("0xx\r\n",ReadBuffer[0]); return 0; } int main(void) { int i; u8 Device_Address; u8 First_Word_Address; u8 Second_Word_address; Device_Address = 0xAE; First_Word_Address = 0x00; Second_Word_address = 0x00; i = 0; iic_master_init(); while(1) { if(i2c_data[i].value==0xff) break; iic_write_read_8(Device_Address,First_Word_Address,Second_Word_address,i2c_data[i].value); i++; } return 0; }这两个i2c的读写程序都比较简单，这里只是简单的介绍下要注意的地方
这个主要是对master控制器进行初始化
iic_master_init();
初始化中主要主要注意：
ConfigPtr = XIicPs_LookupConfig(IIC_DEVICE_ID);
其中这个i2c的设备ID主要是看你用zynq哪个设备，一般都是用的i2c0、i2c1
XPAR_XIICPS_0_DEVICE_ID //对应i2c0
XPAR_XIICPS_1_DEVICE_ID //对应i2c1
下面的这段代码主要设置i2c的工作频率，我这里用的是400k
XIicPs_SetSClk(&IicInstance, 400000);
初始化完成后主要就是进行读写了，在读写之前要将进行的读写的数据进行缓冲，所以会用到Buffer
这个24c32的地址是16位，数据是8位，所以一共要用到3个Buffer进行缓冲
WriteBuffer[0] = First_Word_Address; WriteBuffer[1] = Second_Word_address; WriteBuffer[2] = data;
上面的是写的3个缓冲Buffer，这个是读的缓冲Buffer只有一个
ReadBuffer[0]
缓冲Buffer做完后就开始进行写，这里进行写的函数只要设置缓冲Buffer的个数以及所接的24C32的设备地址就可以了
Status = XIicPs_MasterSendPolled(&IicInstance, WriteBuffer, 3, Device_Address>>1);当数据写完成后开始进行读，读分为两步：第一步写入你所要读的地址、第二步读这个地址里的数据
1. Status = XIicPs_MasterSendPolled(&IicInstance, WriteBuffer, 2, Device_Address>>1); 2. Status = XIicPs_MasterRecvPolled(&IicInstance, ReadBuffer, 1, Device_Address>>1);
这里是连续读写,所以开始写入16位的0x00的起始地址，然后对这个起始地址不断累加进行连续读
对特定地址进行读写和连续读写差不多，这里不再进行介绍
最后的这个是打印i2c读Buffer里的数据
xil_printf("0xx\r\n",ReadBuffer[0]);
