📄 ac15-1.c
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#include <iom16v.h>
#include <macros.h>
//-----------------------------------------------
#define uchar unsigned char
#define uint unsigned int
//-------------------引脚电平的宏定义---------
#define LCM_RS_1 PORTB|=BIT(PB0)
#define LCM_RS_0 PORTB&=~BIT(PB0)
#define LCM_RW_1 PORTB|=BIT(PB1)
#define LCM_RW_0 PORTB&=~BIT(PB1)
#define LCM_EN_1 PORTB|=BIT(PB2)
#define LCM_EN_0 PORTB&=~BIT(PB2)
#define SCL_1 PORTC|=BIT(PC0)
#define SCL_0 PORTC&=~BIT(PC0)
#define SDA_1 PORTC|=BIT(PC1)
#define SDA_0 PORTC&=~BIT(PC1)
//======================================
#define PIN_SDA (PINC&0x02)
#define DataPort PORTA
#define Busy 0x80
#define xtal 8
#define Some_NOP(); _NOP();_NOP();_NOP();_NOP();_NOP();_NOP();_NOP();_NOP();
//=====================================
const uchar str0[]={"Write : "};//待显字符串
const uchar str1[]={"Read : "};//待显字符串
//========函数声明=========
void Delay_1ms(void);
void Delay_nms(uint n);
void WaitForEnable(void);
void LcdWriteData(uchar W);
void LcdWriteCommand(uchar CMD,uchar Attribc);
void InitLcd(void);
void Display(uchar dd);
void DisplayOneChar(uchar x,uchar y,uchar Wdata);
void ePutstr(uchar x,uchar y,uchar const *ptr);
void port_init(void);
//**********************显示指定座标的一串字符子函数**************
void ePutstr(uchar x,uchar y,uchar const *ptr)
{
uchar i,l=0;
while(ptr[l]>31){l++;}
for(i=0;i<l;i++){
DisplayOneChar(x++,y,ptr[i]);
if(x==16){
x=0;y^=1;
}
}
}
//*******************显示光标定位子函数******************
void LocateXY(char posx,char posy)
{
uchar temp;
temp&=0x7f;
temp=posx&0x0f;
posy&=0x01;
if(posy)temp|=0x40;
temp|=0x80;
LcdWriteCommand(temp,0);
}
//*******************显示指定座标的一个字符子函数*******************
void DisplayOneChar(uchar x,uchar y,uchar Wdata)
{
LocateXY(x,y);
LcdWriteData(Wdata);
}
//*******************LCD初始化子函数*********************
void InitLcd(void)
{
LcdWriteCommand(0x38,0);
Delay_nms(5);
LcdWriteCommand(0x38,0);
Delay_nms(5);
LcdWriteCommand(0x38,0);
Delay_nms(5);
LcdWriteCommand(0x38,1);
LcdWriteCommand(0x08,1);
LcdWriteCommand(0x01,1);
LcdWriteCommand(0x06,1);
LcdWriteCommand(0x0c,1);
}
//********************写命令到LCM子函数********************
void LcdWriteCommand(uchar CMD,uchar Attribc)
{
if(Attribc)WaitForEnable();
LCM_RS_0;LCM_RW_0;_NOP();
DataPort=CMD;_NOP();
LCM_EN_1;_NOP();_NOP();LCM_EN_0;
}
//*******************写数据到LCM子函数********************
void LcdWriteData(uchar dataW)
{
WaitForEnable();
LCM_RS_1;LCM_RW_0;_NOP();
DataPort=dataW;_NOP();
LCM_EN_1;_NOP();_NOP();LCM_EN_0;
}
//*******************检测LCD忙信号子函数*********************
void WaitForEnable(void)
{
uchar val;
DataPort=0xff;
LCM_RS_0;LCM_RW_1;_NOP();
LCM_EN_1;_NOP();_NOP();
DDRA=0x00;
val=PINA;
while(val&Busy)val=PINA;
LCM_EN_0;
DDRA=0xff;
}
//****************************************
void Delay_1ms(void) //1mS延时子函数
{ uint i;
for(i=1;i<(uint)(xtal*143-2);i++)
;
}
//====================================
void Delay_nms(uint n) //n*1mS延时子函数
{
uint i=0;
while(i<n)
{Delay_1ms();
i++;
}
}
/*****************端口初始化********************/
void port_init(void)
{
PORTA = 0x00;
DDRA = 0xFF;
PORTB = 0x00;
DDRB = 0xFF;
PORTC = 0x00;
DDRC = 0x03;
PORTD = 0xFF;
DDRD = 0x00;
}
/*************************************/
char com_data;
uchar cnt;
void delay_iic(int n);
uchar rd_24c01(char a);
void wr_24c01(char a,char b);
/******************扫描按键***************/
uchar scan_key(void)
{
uchar temp;
temp=PIND;
return temp;
}
/***************延时子函数******************/
void delay(uint k)
{
uint i,j;
for(i=0;i<k;i++)
{for(j=0;j<121;j++)
{;}}
}
/*****************启动读写时序子函数******************/
void start(void)
{DDRC=0x03;
SDA_1;Some_NOP();
SCL_1;Some_NOP();
SDA_0;Some_NOP();
SCL_0;Some_NOP();
}
//********************停止操作子函数*********************
void stop(void)
{ DDRC=0x03;
SDA_0;Some_NOP();
SCL_1;Some_NOP();
SDA_1;Some_NOP();
}
//************应答子函数*************
void ack(void)
{ DDRC=0x03;
SCL_1;Some_NOP();
SCL_0;Some_NOP();
}
//*************写入8位子函数*************
void shift8(char a)
{
uchar i,j;
DDRC=0x03;
com_data=a;
for(i=0;i<8;i++)
{
j=com_data&0x80;
if(j==0)SDA_0;
else SDA_1;
SCL_1;Some_NOP();
SCL_0;Some_NOP();
com_data=com_data<<1;
}
}
//**************读24C01A中a地址单元的数据************
uchar rd_24c01(char a)
{
uchar i,command;
DDRC=0x03;
SDA_1;Some_NOP();
SCL_0;Some_NOP();
start();
command=160;
shift8(command);
ack();
shift8(a);
ack();
start();
command=161;
shift8(command);
ack();
SDA_1;Some_NOP();
for(i=0;i<8;i++)
{
DDRC=0x01;
com_data=com_data<<1;
SCL_1;Some_NOP();
if(PIN_SDA==0)com_data&=0xfe;
else com_data|=0x01;
SCL_0;Some_NOP();
}
stop();
return(com_data);
}
//********将RAM中b地址单元的数据写入24C01A中a地址单元中***********
void wr_24c01(char a,char b)
{
uchar command;
DDRC=0x03;
SDA_1;Some_NOP();
SCL_0;Some_NOP();
start();
command=160;
shift8(command);
ack();
shift8(a);
ack();
shift8(b);
ack();
stop();
Some_NOP();
}
//**************延时子函数***********
void delay_iic(int n)
{
int i;
for(i=1;i<n;i++){;}
}
//******************************************
void main(void)
{
uchar key_val,wr_val=0,rd_val=0;
port_init();
Delay_nms(400);
InitLcd();
LcdWriteCommand(0x01,1);
LcdWriteCommand(0x0c,1);
ePutstr(0,0,str0);
Delay_nms(10);
ePutstr(0,1,str1);
Delay_nms(10);
/********************************************/
while(1)
{
DisplayOneChar(9,0,wr_val/100+0x30);
Delay_nms(10);
DisplayOneChar(10,0,(wr_val/10)%10+0x30);
Delay_nms(10);
DisplayOneChar(11,0,wr_val%10+0x30);
Delay_nms(10);
DisplayOneChar(8,1,rd_val/100+0x30);
Delay_nms(10);
DisplayOneChar(9,1,(rd_val/10%10)+0x30);
Delay_nms(10);
DisplayOneChar(10,1,rd_val%10+0x30);
Delay_nms(10);
key_val=scan_key();
switch(key_val)
{
case 0xef:if(wr_val<255)wr_val++;break;
case 0xdf:if(wr_val>0)wr_val--;break;
case 0xbf:wr_24c01(10,wr_val);delay_iic(2500);
DisplayOneChar(15,0,0xef);break;
case 0x7f:rd_val=rd_24c01(10);delay_iic(2500);
DisplayOneChar(15,1,0xef);break;
default:break;
}
Delay_nms(200);
DisplayOneChar(15,0,0x20);Delay_nms(10);
DisplayOneChar(15,1,0x20);Delay_nms(10);
}
}
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