📄 ocmj15x20d(ads7843).c
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/**********************************
☆型号:OCMJ15X20D(ADS7843)
☆单片机:ATmega16(L)
☆内部RC振荡:4M
☆邮箱:roger_cwf@yahoo.com.cn
☆日期:2007/11/02
**********************************/
#include <iom16v.h>
#include <macros.h>
#define uchar unsigned char
#define uint unsigned int
#define sbit(X,Y) (X|=(1<<Y)) //Set Bit y of Byte x
#define cbit(X,Y) (X&=~(1<<Y)) //Clear Bit y of Byte x
#define chkbit(X,Y) (X&(1<<Y)) //Check Bit y of Byte x
#define invbit(X,Y) (X^=(1<<Y)) //Invert Bit y of Byte x
#define LCD_RS PORTD //D0
#define LCD_WR PORTD //D1
#define LCD_RD PORTD //D2
#define LCD_CS1 PORTD //D3
#define LCD_CS2 PORTD //D4
#define LCD_BUSY PORTD //D5
#define LCD_RST PORTD //D6
#define DCLK PORTA //A0
#define CS PORTA //A1
#define DIN PORTA //A2
#define STA PORTA //A3
#define DOUT PORTA //A4
#define IP PORTA //A5
#define data_ora PORTB //MCU PROTB<------> LCM
#define lcd_regname PORTB
#define lcd_regdata PORTB
#define lcd_regnada PORTB
#define lcd_data PORTB
#define lcd_control PORTD
#define TOUCH_MSR_X 0x90 //读X轴坐标指令
#define TOUCH_MSR_Y 0xD0 //读Y轴坐标指令
uchar taby[4];
uchar tabx[4];
uint x[4],y[4];
uchar r;
const uchar chn[]={
" 触摸屏坐标测试 "
" X= "
" Y= "
};
/*延时子程序*/
void Delay_Ns(void)
{
asm("nop");
}
//Nus延时
void Delay_Nus(uint n)
{
uint i=0;
for (i=0;i<n;i++)
Delay_Ns();
}
void Delay_Ms(void)
{
uint i;
for (i=0;i<1140;i++);
}
//Nms延时函数
void Delay_Nms(uint n)
{
uint i=0;
for (i=0;i<n;i++)
Delay_Ms();
}
//端口初始化
void Port_Init(void)
{
PORTA=0xff;
DDRA=0xC7;
PORTB=0xff;
DDRB=0xff;
PORTD=0xff;
DDRD=0xdf;
}
//送数据子函数
void SendData(uchar regnada)
{
lcd_regnada = regnada;
cbit(LCD_CS1,PORTD3);
sbit(LCD_RD,PORTD2);
cbit(LCD_RS,PORTD0);
cbit(LCD_WR,PORTD1);
//Delay_Nus(5);
sbit(LCD_WR,PORTD1);
sbit(LCD_RS,PORTD0);
sbit(LCD_CS1,PORTD3);
/*
LCD_CS1 =0; // chip enable.
LCD_RD = 1; //
LCD_RS = 0; // rs = 0;
LCD_WR = 0; // wr = 0;
;
LCD_WR = 1; // wr = 1;
LCD_RS = 1; // rs = 1;
LCD_CS1 =1; // chip disable.
*/
}
//写资料到缓存器
void WriteDataToREG(uchar regname,uchar regdata)
{
SendData(regname);
//Delay_Nus(5);
SendData(regdata);
}
//写资料到DDRAM
void WiteDataToDDRAM(uchar wrdata)
{
while(chkbit(PIND,PIND5));
lcd_data = wrdata;
cbit(LCD_CS1,PORTD3);
sbit(LCD_RD,PORTD2);
sbit(LCD_RS,PORTD0);
cbit(LCD_WR,PORTD1);
//Delay_Nus(5);
sbit(LCD_WR,PORTD1);
sbit(LCD_RS,PORTD0);
sbit(LCD_CS1,PORTD3);
/*
while(LCD_BUSY == 1);
lcd_data = wrdata;
LCD_CS1 =0; // chip enable.
LCD_RD = 1; //
LCD_RS = 1; // rs = 1;
LCD_WR = 0; // wr = 0;
;
LCD_WR = 1; // wr = 1;
LCD_RS = 1; // rs = 1;
LCD_CS1 =1; // chip disable.
*/
}
//读缓存器
uchar ReadDataFromREG(uchar regname)
{
uchar reg_rddata;
SendData(regname);
lcd_data = 0xff;
DDRB=0x00; //设置为输入
cbit(LCD_CS1,PORTD3); // chip enable.
sbit(LCD_WR,PORTD1); // wr = 1;
cbit(LCD_RS,PORTD0); // rs = 0;
cbit(LCD_RD,PORTD2); // rd = 0;
//Delay_Nus(5);
reg_rddata = lcd_data;
sbit(LCD_RD,PORTD2); // rd = 1;
sbit(LCD_RS,PORTD0); // rs = 1;
sbit(LCD_CS1,PORTD3); // chip disable.
DDRB=0xff; //设置为输出
return(reg_rddata);
/*
lcd_data = 0xff;
LCD_CS1 =0; // chip enable.
LCD_WR = 1; // wr = 1;
LCD_RS = 0; // rs = 0;
LCD_RD = 0; // rd = 0;
;
reg_rddata = lcd_data;
LCD_RD = 1; // rd = 1;
LCD_RS = 1; // rs = 1;
LCD_CS1 =1; // chip disable.
return(reg_rddata);
*/
}
//上电复位
void LCD_Reset(void)
{
Delay_Nms(100); // Delay_Nus 120ms 等待上电复位
lcd_control = 0xff; // LCD_RS/WR/RD/CS1/CS2 normal - skeep high.
}
//设定坐标
void SetXY(uchar x,uchar y)
{
WriteDataToREG(0x60,x); // active window top register(awtr)
WriteDataToREG(0x70,y); // active window top register(awtr)
}
//初始化
void LCD_Initial(void)
{
WriteDataToREG(0x00,0xc9); // lcd control register(lcr)
WriteDataToREG(0x01,0xf2); // misc.register(mir)
WriteDataToREG(0x02,0x10); // advance power setup register(apsr)
WriteDataToREG(0x03,0x80); // advance display setup regiser(adsr)
WriteDataToREG(0x10,0x6b); // cursor control register(ccr)
WriteDataToREG(0x11,0x00); // distance of word or lines register(dwlr)
WriteDataToREG(0x12,0x91); // memory access mode register(awrr)
WriteDataToREG(0x21,0x27); // display window right register(dwrr)
WriteDataToREG(0x31,0xef); // display window bottom register(dwbr)
WriteDataToREG(0x41,0x00); // display window left register(dwlr)
WriteDataToREG(0x51,0x00); // display window top register(dwtr)
WriteDataToREG(0x20,0x27); // active window right register(awrr)
WriteDataToREG(0x30,0xef); // active window bottom register(awbr)
WriteDataToREG(0x40,0x00); // active window left register(awlr)
WriteDataToREG(0x50,0x00); // active window top register(awtr)
WriteDataToREG(0x60,0x00); // cursor position x register(cpxr)
WriteDataToREG(0x61,0x00); // begin segment position register(bgsg)
WriteDataToREG(0x70,0x00); // cursor position y register(cpyr)
WriteDataToREG(0x71,0x00); // shift action range,begin commom register(bgcm)
WriteDataToREG(0x72,0xef); // shift action range,end commom register(edcm)
WriteDataToREG(0x80,0xaa); // blink time register(btr)
WriteDataToREG(0x81,0x00); // frame rate polarity change at common_fa register(fdca)
WriteDataToREG(0x91,0x00); // frame rate polarity change at common_fb register(fdcb)
WriteDataToREG(0x90,0x06); // shift clock control register(sccr)
WriteDataToREG(0xa0,0x11); // interrupt setup & status register(frcb)
WriteDataToREG(0xa1,0x00); // key scan control register(kscr)
WriteDataToREG(0xa2,0x00); // key scan data register(ksdr)
WriteDataToREG(0xa3,0x00); // key scan data expand register(kser)
WriteDataToREG(0xb0,0x27); // interrupt column setup register(intx)
WriteDataToREG(0xb1,0xef); // interrupt row setup register(inty)
WriteDataToREG(0xc0,0x00); // touch panel control register(tpcr)
WriteDataToREG(0xc1,0x0a); // adc status register(adcs)
WriteDataToREG(0xc8,0x80); // touch panel segment high byte data register(tpxr)
WriteDataToREG(0xc9,0x80); // touch panel common high byte data register(tpyr)
WriteDataToREG(0xca,0x00); // touch panel segment/common low byte data register(tpzr)
WriteDataToREG(0xd0,0x80); // lcd contrast control register (lccr)
WriteDataToREG(0xe0,0x00); // pattern data register(pdr)
WriteDataToREG(0xf0,0xa0); // font control register(fcr)
WriteDataToREG(0xf1,0x0f); // font size control register
}
//清屏
void LCD_Clear(void)
{
uchar reg_rddata;
WriteDataToREG(0xe0,0x00);
WriteDataToREG(0xf0,0xa8);
Delay_Nms(10);
}
/*
//显示图形
void Display_Picture(const uchar *pho)
{
uchar i,j,k;
const uchar *pp;
SetXY(0,0);
for(k=0;k<4;k++)
{
pp=pho;
for(j=0;j<60;j++)
{
for(i=0;i<40;i++)
{
WiteDataToDDRAM(*pp);
++pp;
}
}
}
}
//显示点阵
void Display_Grid(uchar data1,uchar data2)
{
uchar i,j;
SetXY(0,0);
for(j=0;j<60;j++)
{
for(i=0;i<80;i++)
{
WiteDataToDDRAM(data1);
}
for(i=0;i<80;i++)
{
WiteDataToDDRAM(data2);
}
}
}
*/
//显示中文或字符
void Display_Chinese(const uchar *cha,unsigned int count)
{
int i;
for(i=0;i<count;i++)
{
WiteDataToDDRAM(*cha);
++cha;
}
}
//显示中文或字符
void Display_Chinese1(uint count)
{
WiteDataToDDRAM(count);
}
//SPI写数据
WriteDataTo7843(unsigned char num)
{
unsigned char count=0;
cbit(DCLK,PORTA0); //DCLK=0
for(count=0;count<8;count++)
{
if(num&0x80)
sbit(DIN,PORTA2); //进位标志位为1时 DIN=1
else
cbit(DIN,PORTA2);
num<<=1;
cbit(DCLK,PORTA0); //上升沿有效
Delay_Nus(4);
sbit(DCLK,PORTA0);
Delay_Nus(4);
}
}
//SPI 读数据
ReadDataFrom7843()
{
unsigned char count=0;
unsigned int Num=0;
for(count=0;count<12;count++)
{
Num<<=1;
sbit(DCLK,PORTA0);
Delay_Nus(4);
cbit(DCLK,PORTA0);
Delay_Nus(4);
if(chkbit(PINA,PINA4)) Num++;
}
return(Num);
}
//SPI开始
void start()
{
cbit(DCLK,PORTA0);
sbit(CS,PORTA1);
sbit(DIN,PORTA2);
sbit(DCLK,PORTA0);
cbit(CS,PORTA1);
}
//触摸处理
void Go_Touch(void)
{
unsigned int X=0,Y=0;
start(); //启动SPI
Delay_Nus(2);
for(r=0;r<4;r++)
{
WriteDataTo7843(TOUCH_MSR_X); //送控制字 10010000 即用差分方式读X坐标 详细请见有关资料
Delay_Nus(4);
cbit(DCLK,PORTA0);
Delay_Nus(4);
x[r]=ReadDataFrom7843(); //读X轴坐标
WriteDataTo7843(TOUCH_MSR_Y); //送控制字 11010000 即用差分方式读Y坐标 详细请见有关资料
sbit(DCLK,PORTA0);
Delay_Nus(4);
cbit(DCLK,PORTA0);
Delay_Nus(4);
y[r]=ReadDataFrom7843(); //读Y轴坐标
}
sbit(CS,PORTA1);
sbit(IP,PORTA5);
X=(x[0]+x[1]+x[2]+x[3])/4;
Y=(y[0]+y[1]+y[2]+y[3])/4;
tabx[0]=X/1000;
tabx[1]=X%1000/100;
tabx[2]=X%100/10;
tabx[3]=X%10;
taby[0]=Y/1000;
taby[1]=Y%1000/100;
taby[2]=Y%100/10;
taby[3]=Y%10;
WriteDataToREG(0x10,0x00);//反相存入
WriteDataToREG(0x00,0xcd);
for(r=0;r<4;r++)
{
SetXY(19+r,64);
Display_Chinese1(0x30+tabx[r]);
}
for(r=0;r<4;r++)
{
SetXY(19+r,80);
Display_Chinese1(0x30+taby[r]);
}
Delay_Nms(100);
}
//!!!!!!!主程序!!!!!!!!!!!
void main (void)
{
CLI();
MCUCR = 0x00;
GICR = 0x00;
TIMSK = 0x00; //timer interrupt sources
Port_Init();
LCD_Reset();
LCD_Initial();
LCD_Clear();
WriteDataToREG(0x10,0x29);
WriteDataToREG(0x00,0xcd);
SetXY(0,48);
Display_Chinese(chn,120);
while(1)
{
if(!chkbit(PINA,PINA5))
{
Delay_Nms(20); //延时以消抖
if(!chkbit(PINA,PINA5)) //检测触摸屏是否被按下
{
Go_Touch();
}
}
}
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