XilinxFPGA中使用LCD1602的方法一、XPS中的設(shè)置1.在XPS添加一個(gè)XPSGeneralPurposeIO，并將其命名為“Char_LCD”。注：這里的命名有一定的規(guī)則，將其命名為“Char_LCD”，是因?yàn)樵诤髞?lái)的C程序中調(diào)用LCD基地址的時(shí)候使用的名字為“XPAR_CHAR_LCD_BASEADDR”，如果將這個(gè)命名為其他的（比如XX），那么在下面的lcd.h中也要將

#defineLCD_BASEADDRXPAR_CHAR_LCD_BASEADDR這一句中的"CHAR_LCD"改成對(duì)應(yīng)的名稱。2.配置Char_LCD中Channel1的GPIODataChannelWidth為11并在Ports中設(shè)置為ConnectedtoExternalPorts。3.在System.ucf加入相應(yīng)的管教約束，這里提供GenesysDigilent開(kāi)發(fā)板中對(duì)應(yīng)的管腳約束，管腳的名稱自然而言和上面使用的名稱對(duì)應(yīng)。

#Char_LCDconstraints

#Char_LCD_GPIO_IO_pin<0>correspondstoLCD_E

#Char_LCD_GPIO_IO_pin<1>correspondstoLCD_RS

#Char_LCD_GPIO_IO_pin<2>correspondstoLCD_RW

#Char_LCD_GPIO_IO_pin<3>correspondstoLCD_D7,<4>toLCD_D6...<10>toLCD_D0NetChar_LCD_GPIO_IO_pin<0>LOC=AA5|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<1>LOC=V7|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<2>LOC=W6|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<3>LOC=AD7|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<4>LOC=AC7|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<5>LOC=AC5|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<6>LOC=AB6|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<7>LOC=AC4|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<8>LOC=AB5|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<9>LOC=AB7|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;

NetChar_LCD_GPIO_IO_pin<10>LOC=Y8|IOSTANDARD=LVCMOS33|TIG|PULLDOWN;二、SDK中的代碼模板1.將lcd.h、lcd.c、sleep.h和sleep.c添加到工程的src文件夾中，并在需要調(diào)用LCD的代碼中添加

#include"lcd.h"2.在使用LCD之前需要進(jìn)行初始化，添加下面代碼：

LCDOff();

LCDClear();

LCDOn();

LCDInit();3.需要在LCD中顯示時(shí)，調(diào)用下面函數(shù)

LCDPrintString(First_Line,Second_Line;//First_Line和Second_Line都是char*類型附件：博文中提到文件的源代碼：1.lcd.h

/*******************************************************************************

*

*XILINXISPROVIDINGTHISDESIGN,CODE,ORINFORMATION"ASIS"

*SOLELYFORUSEINDEVELOPINGPROGRAMSANDSOLUTIONSFOR

*XILINXDEVICES.BYPROVIDINGTHISDESIGN,CODE,ORINFORMATION

*ASONEPOSSIBLEIMPLEMENTATIONOFTHISFEATURE,APPLICATION

*ORSTANDARD,XILINXISMAKINGNOREPRESENTATIONTHATTHIS

*IMPLEMENTATIONISFREEFROMANYCLAIMSOFINFRINGEMENT,

*ANDYOUARERESPONSIBLEFOROBTAININGANYRIGHTSYOUMAYREQUIRE

*FORYOURIMPLEMENTATION.XILINXEXPRESSLYDISCLAIMSANY

*WARRANTYWHATSOEVERWITHRESPECTTOTHEADEQUACYOFTHE

*IMPLEMENTATION,INCLUDINGBUTNOTLIMITEDTOANYWARRANTIESOR

*REPRESENTATIONSTHATTHISIMPLEMENTATIONISFREEFROMCLAIMSOF

*INFRINGEMENT,IMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESS

*FORAPARTICULARPURPOSE.

*

*(c)Copyright2007Xilinx,Inc.

*Allrightsreserved.

*

******************************************************************************/#ifndefLCD_H

#defineLCD_H//=====================

//TESTFUNCTIONS

//=====================

voidLCDTest();

voidLCDTestMenu();

voidLCDTestInput(charch);//=====================

//EXTERNALFUNCTIONS

//=====================#defineLCD_BASEADDRXPAR_CHAR_LCD_BASEADDR//根據(jù)需要修改這里voidLCDOn();

voidLCDOff();

voidLCDClear();

voidLCDInit();voidLCDEnableDisplayShift();

voidLCDEnableCursorBlink();voidLCDDisableDisplayShift();

voidLCDDisableCursorBlink();voidMoveCursorHome();

voidMoveCursorRight();

voidMoveCursorLeft();voidLCDSetLine(intline);

voidLCDPrintChar(charc);

voidLCDPrintString(char*line1,char*line2);//=====================

//INTERNALFUNCTIONS

//=====================

voidInitInst(void);

voidWriteInst(unsignedlonginst1,unsignedlonginst2);

voidWriteData(unsignedlongdata1,unsignedlongdata2);

voidWriteInst8(unsignedlonginst);

voidWriteData8(unsignedlongdata);#endif2.lcd.c

/******************************************************************************

*

*XILINXISPROVIDINGTHISDESIGN,CODE,ORINFORMATION"ASIS"

*ASACOURTESYTOYOU,SOLELYFORUSEINDEVELOPINGPROGRAMSAND

*SOLUTIONSFORXILINXDEVICES.BYPROVIDINGTHISDESIGN,CODE,

*ORINFORMATIONASONEPOSSIBLEIMPLEMENTATIONOFTHISFEATURE,

*APPLICATIONORSTANDARD,XILINXISMAKINGNOREPRESENTATION

*THATTHISIMPLEMENTATIONISFREEFROMANYCLAIMSOFINFRINGEMENT,

*ANDYOUARERESPONSIBLEFOROBTAININGANYRIGHTSYOUMAYREQUIRE

*FORYOURIMPLEMENTATION.XILINXEXPRESSLYDISCLAIMSANY

*WARRANTYWHATSOEVERWITHRESPECTTOTHEADEQUACYOFTHE

*IMPLEMENTATION,INCLUDINGBUTNOTLIMITEDTOANYWARRANTIESOR

*REPRESENTATIONSTHATTHISIMPLEMENTATIONISFREEFROMCLAIMSOF

*INFRINGEMENT,IMPLIEDWARRANTIESOFMERCHANTABILITYANDFITNESS

*FORAPARTICULA