c51单片机想做个密码重置按键K13不知道如何去做,用了24c02来存储。最好依照我的程序来更改谢谢求解答
#include<reg51.h>
#include<string.h>
#define AT24C02_ADDRESS 0xA0
#define PASSWORD_SIZE 4
#define LCD_LINE_LENGTH 16
// 定义LCD和按键相关SFR
sbit lcd_RS = P2^0;
sbit lcd_RW = P2^1;
sbit lcd_E = P2^2;
sbit jidianqi = P2^7;
sbit buzzer = P3^0;
sbit SDA = P3^3; // 根据实际硬件连接配置SDA引脚
sbit SCL = P3^2; // 根据实际硬件连接配置SCL引脚
// 定义键值数组
char key[] = {0, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30};
// 定义字符串常量
char key2[] = "Correct";
char key3[] = "Error";
char table[] = "password";
char table1[] = "input:";
char table2[] ="newpassword";
char passwordInput[5];
char newpassword;
// 延时函数
void delay(unsigned int x) {
unsigned int i;
for(x = 0; x < 100; x++)
for(i = 0; i < x; i++);
}
// 五元音报警函数
void wuyuan() {
int k;
for(k = 0; k < 20; k++) {
buzzer = 1;
delay(39999);
buzzer = 0;
delay(39999);
}
}
// 写命令到LCD函数
void write_com(unsigned char com) {
while(lcd_busy());
lcd_RS = 0;
lcd_RW = 0;
delay(200);
P0 = com;
delay(200);
lcd_E = 1;
delay(200);
lcd_E = 0;
}
// 写数据到LCD函数
void write_dat(unsigned char dat) {
while(lcd_busy());
lcd_RS = 1;
lcd_RW = 0;
P0 = dat;
delay(200);
lcd_E = 1;
delay(200);
lcd_E = 0;
}
// 写密码字符到LCD函数
void write_password_char() {
write_dat(42);
}
// 判断LCD是否忙函数
lcd_busy() {
unsigned char temp;
lcd_RS = 0;
lcd_RW = 1;
delay(20);
P0 = 0xff;
delay(20);
lcd_E = 1;
delay(20);
temp = P0;
delay(20);
lcd_E = 0;
return(temp & 0x80);
}
// LCD初始化函数
void init() {
write_com(0x01);
write_com(0x38);
write_com(0x0c);
write_com(0x06);
}
// 检测矩阵键盘函数
unsigned char juxingjianpan() {
unsigned char KeyNumber, x, y,debounce_count;
for (debounce_count = 0; debounce_count < 5; debounce_count++) { // 假设循环5次作为消抖延时
P1 = 0x0f;
x = P1;
P1 = 0xf0;
y = P1;
// 检查按键是否稳定(连续读取几次都相同)
if ((x + y) == (P1 & 0x0f) + ((P1 & 0xf0) >> 4)) {
break;
}
delay(10); // 添加一个简短的延时,例如20ms
}
switch(x + y) {
case 0xee: KeyNumber = 1; break;
case 0xde: KeyNumber = 2; break;
case 0xbe: KeyNumber = 3; break;
case 0x7e: KeyNumber = 4; break;
case 0xed: KeyNumber = 5; break;
case 0xdd: KeyNumber = 6; break;
case 0xbd: KeyNumber = 7; break;
case 0x7d: KeyNumber = 8; break;
case 0xeb: KeyNumber = 9; break;
case 0xdb: KeyNumber = 10; break;
case 0xbb: KeyNumber = 11; break;
case 0x7b: KeyNumber = 12; break;
case 0xe7: KeyNumber = 13; break;
case 0xd7: KeyNumber = 14; break;
}
return KeyNumber;
}
void i2c_init() {
SDA = 1;
SCL = 1;
}
void i2c_Start(void) {
SDA = 1;
SCL = 1;
SDA = 0;
SCL = 0;
}
void i2c_Stop(void) {
SDA = 0;
SCL = 1;
SDA = 1;
}
void i2c_sendByte(unsigned char Byte) //发送一个字节
{ unsigned char i;
for(i=0;i<4;i++)
{ SDA = Byte&(0X80>>i);
SCL = 1;
SCL = 0;
}
}
unsigned char i2c_ReceiverByte(void) //接收一个字节
{ unsigned char i,Byte=0x00;
SDA = 1;
for(i=0;i<4;i++)
{ SCL = 1;
if(SDA){Byte|=(0x80>>i);}
SCL = 0;
}
return Byte;
}
void i2c_sendAck(unsigned char AckBit)
{ SDA =AckBit;
SCL = 1;
SCL = 0;
}
unsigned char i2c_ReceiveAck(void)
{ unsigned char AckBit=0;
SDA =1;
SCL =1;
AckBit=SDA;
SCL =0;
return AckBit;
}
void AT24C02_WriteByte( unsigned char wordAddress,Data) //写字节
{
i2c_Start();
i2c_sendByte(AT24C02_ADDRESS);
i2c_ReceiveAck();
i2c_sendByte(wordAddress);
i2c_ReceiveAck();
i2c_sendByte(Data);
i2c_ReceiveAck();
i2c_Stop();
}
unsigned char AT24C02_ReadByte(unsigned char wordAddress)
{ unsigned char Data;
i2c_Start();
i2c_sendByte(AT24C02_ADDRESS);
i2c_ReceiveAck();
i2c_sendByte(wordAddress);
i2c_ReceiveAck();
i2c_Start();
i2c_sendByte(AT24C02_ADDRESS|0x01);
i2c_ReceiveAck();
Data=i2c_ReceiverByte();
i2c_sendAck(1);
i2c_Stop();
return Data;
}
void main() {
static unsigned char position = 0, x = 0, y;
unsigned int i, KeyNum, passwordLen = 0;
unsigned char j,isMatch;
unsigned char storedPassword[PASSWORD_SIZE];
// 初始化LCD
init();
// 在LCD上显示"password"和"input:"
write_com(0x80);
for(i = 0; i < 8; i++) {
write_dat(table[i]);
}
write_com(0xc0);
for(i = 0; i < 6; i++) {
write_dat(table1[i]);
}
while(1) {
write_com(0xc6 + position);
// 获取当前按键值
KeyNum = juxingjianpan();
if(KeyNum) {
if(KeyNum <= 10 && x <= 3) {
write_dat(key[KeyNum]);
passwordInput[passwordLen++] = key[KeyNum];
position++;
x++;
} else if(KeyNum == 11) { // 确认键
if(strcmp(passwordInput, "1234") == 0) {
write_com(0x01);
delay(20);
write_com(0x86);
jidianqi = 0;
for(y = 0; y < 7; y++) {
write_dat(key2[y]);
delay(5);
}
} else {
write_com(0x01);
delay(20);
write_com(0x86);
wuyuan();
for(y = 0; y < 5; y++) {
write_dat(key3[y]);
delay(5);
}
}
memset(passwordInput, 0, sizeof(passwordInput));
passwordLen = 0;
x = 0;
position = 0;
} else if(KeyNum == 12) { // 清除键
memset(passwordInput, 0, sizeof(passwordInput));
passwordLen = 0;
x = 0;
position = 0;
buzzer = 1;
delay(20);
buzzer = 0;
delay(20);
jidianqi = 1;
write_com(0x01);
write_com(0x80);
for(i = 0; i < 8; i++) {
write_dat(table[i]);
}
write_com(0xc0);
for(i = 0; i < 6; i++) {
write_dat(table1[i]);
}
}else if(KeyNum == 13) { // K13重置密码键位
write_com(0x01);
delay(20);
write_com(0x80);
for(i = 0; i < strlen(table2); i++) {
write_dat(table2[i]);
}
i2c_init();
for(i=0;i<passwordLen;i++)
{
AT24C02_WriteByte(i,passwordInput[i]);
}
}
}
}
}