LCD1602程序设计代码实例
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <c8051f020.h> // SFR declarations
#include <stdio.h>
//-----------------------------------------------------------------------------
// 16-bit SFR Definitions for 'F02x
//-----------------------------------------------------------------------------
sfr16 DP = 0x82; // data pointer
sfr16 TMR3RL = 0x92; // Timer3 reload value
sfr16 TMR3 = 0x94; // Timer3 counter
sfr16 ADC0 = 0xbe; // ADC0 data
sfr16 ADC0GT = 0xc4; // ADC0 greater than window
sfr16 ADC0LT = 0xc6; // ADC0 less than window
sfr16 RCAP2 = 0xca; // Timer2 capture/reload
sfr16 T2 = 0xcc; // Timer2
sfr16 RCAP4 = 0xe4; // Timer4 capture/reload
sfr16 T4 = 0xf4; // Timer4
sfr16 DAC0 = 0xd2; // DAC0 data
sfr16 DAC1 = 0xd5; // DAC1 data
//-----------------------------------------------------------------------------
// Global CONSTANTS
//-----------------------------------------------------------------------------
#define SYSCLK 22118400 // SYSCLK frequency in Hz
/*sbit YJRS = P4^0;
sbit YJRW = P4^1;
sbit YJE = P4^2;
sbit YJDB4 = P5^4;
sbit YJDB5 = P5^5;
sbit YJDB6 = P5^6;
sbit YJDB7 = P5^7;
*/
sbit SW1 = P3^7; // SW1='0' means switch pressed
//-----------------------------------------------------------------------------
// Function PROTOTYPES
//-----------------------------------------------------------------------------
void SYSCLK_Init (void);
void PORT_Init (void);
void Write_COM(unsigned yjcom );
void Write_CHAR(unsigned char yjchar);
void Write_STR(unsigned char *s);
void YJ_Init(void);
void YJ_Mode1(void);
void YJ_Mode2(void);
void YJ_Mode3(void);
void CG_Write(void);
void MYCHAR_Disp(void);
//-----------------------------------------------------------------------------
// Global VARIABLES
//-----------------------------------------------------------------------------
int code tab1[12]={0X43,0X75,0X72,0X73,0X6f,0X72,0X20, //Cursor
0X57,0X72,0X69,0X74,0X65}; //write
int code tab2[16]={0X43,0X75,0X72,0X73,0X6f,0X72, //Cursor
0X4C,0X65,0X66,0X74, //Left
0X53,0X63,0X72,0X6F,0X6C,0X6C}; //Scroll
int code tab3[19]={0X43,0X75,0X72,0X73,0X6f,0X72,0x20, //Cursor
0X52,0X69,0X67,0X68,074,0x20, //Left
0X53,0X63,0X72,0X6F,0X6C,0X6C}; //Scroll
int code cgtab[64]={0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02, //年
0x0f,0x09,0x0f,0x09,0x0f,0x09,0x11,0x00, //月
0x1f,0x11,0x11,0x1f,0x11,0x11,0x1f,0x00, //日
0x11,0x0a,0x04,0x1f,0x04,0x1f,0x04,0x00, //$
0x0e,0x00,0x1f,0x0a,0x0a,0x0a,0x13,0x00, //元
0x18,0x18,0x07,0x08,0x08,0x08,0x07,0x00, //℃
0x04,0x0a,0x15,0x04,0x04,0x04,0x04,0x00, //10
0x17,0x15,0x15,0x15,0x15,0x15,0x17,0x00}; //↑
int code tabdy[36]={0x4d,0x44,0x4c,0x53,0x34,0x30,0x32,0x36,0x36,
0x20,0x03,0x32,0x35,0x35,0x2e,0x30,0x30,0x04,
0x31,0x39,0x39,0x37,0x00,0x37,0x01,0x31,0x02,
0x20,0x54,0x3d,0x33,0x35,0x05,0x06,0x20,0x07};
//-----------------------------------------------------------------------------
// MAIN Routine
//-----------------------------------------------------------------------------
void main (void) {
int i,j,k;
unsigned char code test[]="0123456789ABCDEF"; // temperature
WDTCN = 0xde; // disable watchdog timer
WDTCN = 0xad;
SYSCLK_Init (); // initialize oscillator
PORT_Init (); // initialize crossbar and GPIO
YJ_Init();
P4 = 0;
P5 = 0xff;
/* while (1) {
Write_COM(0x80);
for(k=0;k<2500;k++);
Write_STR(test);
Write_COM(0xc0);
for(k=0;k<2500;k++);
Write_STR("abcdefghijklmnop");
}*/
//YJ_Mode1();
//CG_Write();
MYCHAR_Disp();
for(i=0;i<2000;i++)
{
for(j=0;j<20;j++)
{
for(k=0;k<240;k++);
}
};
}
//-----------------------------------------------------------------------------
// Initialization Subroutines
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// SYSCLK_Init
//-----------------------------------------------------------------------------
//
// This routine initializes the system clock to use an 22.1184MHz crystal
// as its clock source.
void SYSCLK_Init (void)
{
int i; // delay counter
OSCXCN = 0x67; // start external oscillator with
// 22.1184MHz crystal
for (i=0; i < 256; i++) ; // XTLVLD blanking interval (>1ms)
while (!(OSCXCN & 0x80)) ; // Wait for crystal osc. to settle
OSCICN = 0x88; // select external oscillator as SYSCLK
// source and enable missing clock
// detector
}
//-----------------------------------------------------------------------------
// PORT_Init
//-----------------------------------------------------------------------------
//
// Configure the Crossbar and GPIO ports
//
void PORT_Init (void)
{
XBR0 = 0x00; // XBAR0: Initial Reset Value
XBR1 = 0x00; // XBAR1: Initial Reset Value
XBR2 = 0x40; // XBAR2: Initial Reset Value
// Select Pin I/0
// NOTE: Some peripheral I/O pins can function as either inputs or
// outputs, depending on the configuration of the peripheral. By default,
// the configuration utility will configure these I/O pins as push-pull
// outputs.
// Port configuration (1 = Push Pull Output)
P0MDOUT = 0x00; // Output configuration for P0
P1MDOUT = 0x00; // Output configuration for P1
P2MDOUT = 0x00; // Output configuration for P2
P3MDOUT = 0x00; // Output configuration for P3
P74OUT = 0x01; // Output configuration for P4-7
P1MDIN = 0xFF; // Input configuration for P1
}
//写指令代码子程序
void Write_COM(unsigned yjcom )
{
int bf_sta,k;
P4&=0xfe; //RS=0
P4|=0x02; //R/W=1
do {
P5 = 0xff;
P4|= 0x04;
bf_sta = P5;
P4 &= 0xfb;
P4 |= 0x04;
P4 &= 0xfb;
}
while (bf_sta & 0x80);
P4 &= 0xfd; //R/W=0
P5 = yjcom;
P4 |= 0x04; //E=1
P4 &= 0xfb; //E=0
P5 = yjcom << 4;
P4 |= 0x04;
P4 &= 0xfb;
for(k=0;k<250;k++);
}
//写显示数据子程序(单个字符)
void Write_CHAR(unsigned char yjchar)
{
int bf_sta,k;
P4&=0xfe;
P4|=0x02;
do {
P5 = 0xff;
P4 |= 0x04;
bf_sta = P5;
P4 &= 0xfb;
P4 |= 0x04;
P4 &= 0xfb;
}
while (bf_sta & 0X80);
P4 |= 0x01; //RS=1
P4 &= 0xfd; //R/W=0
P5 = yjchar;
P4 |= 0x04;
P4 &= 0xfb;
P5=yjchar << 4;
P4 |= 0x04;
P4 &= 0xfb;
// for(k=0;k<2500;k++);
}
//写字符串
void Write_STR(unsigned char *str1)
{
int k;
unsigned char yjchar1;
while(*str1 != 0x0)
{
yjchar1=*str1;
Write_CHAR(yjchar1);
str1++;
for(k=0;k<2500;k++);
}
}
//液晶初始化
void YJ_Init(void)
{
int i,j;
P5=0X30;
P4&=0XFE;
P4&=0XFD; //RS=R/W=E=0
for(i=0;i<3;i++){
P4|=0X04;
P4&=0XFB;
for(j=0;j<250;j++);
}
Write_COM(0x28); //4位数据接口，两行显示5×7点阵字符
Write_COM(0x01); //清屏
Write_COM(0x06); //数据读、写操作后，AC自动增一
//数据读、写操作，画面不动
Write_COM(0x0f); //显示开、光标开、闪烁开
}
//逐字依次输入方式演示程序段
void YJ_Mode1(void)
{
int i,j;
Write_COM(0x06); //数据读、写操作后，AC自动增一
//数据读、写操作，画面不动
Write_COM(0x80);
for(j=0;j<250;j++);
for(i=0;i<12;i++){
Write_CHAR(tab1[i]);
for(j=0;j<250;j++);
};
Write_COM(0xC0);
for(j=0;j<250;j++);
for(i=0;i<12;i++){
Write_CHAR(tab1[i]);
for(j=0;j<250;j++);
};
}
//光标左移输入方式演示程序段
void YJ_Mode2(void)
{
int i,j,k;
Write_COM(0x04); //数据读、写操作后，AC自动增一
//数据读、写操作，画面不动
Write_COM(0x90);
for(i=0;i<12;i++){
Write_CHAR(tab1[12-i]);
for(j=0;j<1000;j++)
for(k=0;k<250;k++);
};
Write_COM(0xd0);
for(j=0;j<250;j++);
for(i=0;i<16;i++){
Write_CHAR(tab2[16-i]);
for(j=0;j<1000;j++)
for(k=0;k<250;k++);
};
}
//光标右移输入方式演示程序段
void YJ_Mode3(void)
{
int i,j,k;
Write_COM(0x06); //数据读、写操作后，AC自动增一
//数据读、写操作，画面不动
Write_COM(0x80);
for(i=0;i<19;i++){
Write_CHAR(tab1[i]);
for(j=0;j<1000;j++)
for(k=0;k<250;k++);
};
}
/*自定义字符显示演示程序段*/
void MYCHAR_Disp(void)
{
int i,j;
CG_Write();
Write_COM(0x80);
for(i=0;i<16;i++){
Write_CHAR(tabdy[i]);
for(j=0;j<250;j++);
};
Write_COM(0xc0);
for(i=0;i<16;i++){
Write_CHAR(tabdy[i+18]);
for(j=0;j<100;j++);
};
}
//建立自定义字符块
void CG_Write(void)
{
int i,j;
Write_COM(0x40);
for(j=0;j<250;j++);
for(i=0;i<64;i++){
Write_CHAR(cgtab[i]);
for(j=0;j<250;j++);
};
}
