comments :
1、八线制驱动LCD1602B：PB0-PB7为数据线，PD3/PD4/PD6控制LCD1602B的RS,RW,EN。
2、设置和读取DS1302内部时钟，并通过LCD1602显示。
3、进行此实验请插上JP1、JP2的所有8个短路块，PC2、PC3、PC4、PC7短路块。
4、DS1302芯片接口占用JTAG仿真接口，在做实验时需要关闭mega16的JTAG功能，否则
不正常显示。
仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）
单片机源程序如下:
- #include <iom16v.h>
- #include <macros.h>
- #include "ds1302.h"
- #include "LCD1602.h"
- void main(void)
- {
- unsigned char temp;
- Port_init(); //端口初始化
- LCD_init(); //LCD初始化
- LCD_clear(); //清屏
- ds1302_init(); //DS1302初始化
- delay_ms(10);
- ds1302_write_time(); //写入初始值
- while (1)
- {
- delay_ms(200); //每200ms更新一次时间
- ds1302_read_time(); //读取时间
- //LCD_clear(); //清屏
-
- temp = (time_buf[0] >> 4) + '0';
- LCD_write_char(0, 0, temp);/*年*/
- temp = (time_buf[0] & 0x0F) + '0';
- LCD_write_char(1, 0, temp);
- temp = (time_buf[1] >> 4) + '0';
- LCD_write_char(2, 0, temp);
- temp = (time_buf[1] & 0x0F) + '0';
- LCD_write_char(3, 0, temp);
- LCD_write_char(4, 0, '-');
-
- temp = (time_buf[2] >> 4) + '0';
- LCD_write_char(5, 0, temp);/*月*/
- temp = (time_buf[2] & 0x0F) + '0';
- LCD_write_char(6, 0, temp);
- LCD_write_char(7, 0, '-');
-
- temp = (time_buf[3] >> 4) + '0';
- LCD_write_char(8, 0, temp);/*日*/
- temp = (time_buf[3] & 0x0F) + '0';
- LCD_write_char(9, 0, temp);
-
- LCD_write_str(0,1,"week:");
- temp = (time_buf[7]) + '0';
- LCD_write_char(5, 1, temp); //周
-
- temp = (time_buf[4] >> 4) + '0';
- LCD_write_char(8, 1, temp); //时
- temp = (time_buf[4] & 0x0F) + '0';
- LCD_write_char(9, 1, temp);
- LCD_write_char(10, 1, ':');
-
- temp = (time_buf[5] >> 4) + '0';
- LCD_write_char(11, 1, temp);/*分*/
- temp = (time_buf[5] & 0x0F) + '0';
- LCD_write_char(12, 1, temp);
- LCD_write_char(13, 1, ':');
-
- temp = (time_buf[6] >> 4) + '0';
- LCD_write_char(14, 1, temp);/*秒*/
- temp = (time_buf[6] & 0x0F) + '0';
- LCD_write_char(15, 1, temp);
- }
- }
所有资料51hei提供下载:
LCD1602&DS1302时钟测试.zip
(183.08 KB, 下载次数: 53)
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