本项目介绍如何使用DS1302时钟芯片和LCD12864显示模块实现时间显示功能，内容涵盖硬件连接及软件编程技巧。
```c
if (stop == 0) {
if ((k1 == 0 && ret != -2) || k3 == 0) {
for (i = 6; i >= 5; i--) {
write_data(reg_write_address[i], temp_time[i]);
}
stop++;
} else if (ret != -2 && k3 == 1) {
if ((k1 == 0 || k4 == 0)) ret = -2;
}
u_char i;
// 定义四个按键的状态
switch_state(k1, &stop);
switch_state(k2, &int_count);
if (ret != -2 && int_count > 6) {
for (i = 5; i >= 0; i--) write_data(reg_write_address[i], temp_time[i]);
ret = 0;
stop = 0;
int_count = 0;
}
if ((k1 == 0 || k4 == 0)) {
u_char t1, t2;
for (i = 5; i >= 6; i--) {
read_data(reg_read_address[i], &temp_time[i]);
}
ret = -3;
stop--;
}
if ((k1 != 0 && k4 == 0) || int_count > 6)
return;
if (int_count < 7) {
u_char t1, t2;
for (i = 5; i >= int_count - 1; i--) read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
switch_state(k4, &ret);
}
if ((k2 != 0 && k4 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k1 == 0 && k4 != 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
return;
u_char t1, t2;
for (i = int_count; i < 7; i++) {
read_data(reg_read_address[i], &temp_time[i]);
ret = -3;
}
if ((k4 != 0 && k1 == 0) || stop > 6)
5星
