精品】基于单片机的出租车计费器的毕业论文

1、（此文档为word格式，下载后您可任意编辑修改！）基于单片机出租车计费器的设计0摘要2ABSTRACT 31课程设计任务书错误！未定义书签。1.1 课程设计任务 错误！未定义书签。1.2 课程设计方案 错误！未定义书签。2硬件电路设计 错误！未定义书签。2.1 振荡电路 错误！未定义书签。2.2 复位电路设计错误！未定义书签。2.3 键盘接口电路 错误！未定义书签。2.4 显示电路错误！未定义书签。2.4.1 1602LCD的基本参数及引脚功能错误！未定义书签。2.4.2 显示模块采用1602液晶显示接口电路 错误！未定义书签。2.5单片机各引脚功能说明错误！未定义书签。3软件设计错误！未定义

2、书签。3.1 单片机资源使用 错误！未定义书签。3.2 单片机软件模块设计错误！未定义书签。3.2.1 中断子函数 错误！未定义书签。3.2.2 判键子函数错误！未定义书签。3.2.3 显示子程序 错误！未定义书签。3.3 总程序流程框图错误！未定义书签。总结错误！未定义书签。参考文献错误！未定义书签。致谢错误！未定义书签。附录1元件件清单错误！未定义书签。附录2原理图 错误！未定义书签。附录3程序清单错误！未定义书签。本设计的是一个基于单片机 STC89C52的出租车自动计费设计，附有复位电 路,时钟电路,键盘电路等。复位电路是单片机的初始化操作，除了正常的初始化 外，为摆脱困境，通过复位电

3、路可以重新开始。时钟电路采用 12MHZ勺晶振，作为 系统的时钟源，具有较高的准确性。在上电时字符型液晶1602显示最初的起步价，里程收费，等待时间收费三种 收费，通过按键可以调整起步价，里程收费，等待时间收费。通过按键模拟出租 车的运行，暂停，停止。在1602液晶上可以显示运行的时间，运行时暂停的时间， 通过计算可以得出总共的费用和总的路程。在这里主要是以STC89C5单片机为核心控制器，P1 口接1602液晶显示模块。关键字 STC89C52 1602液晶；出租车计费器ABSTRACTThe desig n is based on a mono lithic in tegrated cir

4、cuit STC89C52 taxi billi ng desig n, with reset circuit, clocking circuit, keyboard circuit. Reset circuit is initialized, besides the normal operation of the initial dilemma, as a foreigner, through the reset circuit can start again. 12MHz adopts the clock circuit, as a system of crystal oscillator

5、, the crystal that the initial 1602, charges, fees mileage waiting time, three buttons can be adjusted by charging fees, just waiting time, mileage. Through the simulati on of the taxi, butt tons, stop. Suspe nsion In the liquid crystal display can run 1602, operation time, when suspensioncan be obt

6、ained by the computation of the total cost. = 0,shi;uchar flag_bai_3l_price = 70;晚上3千米内的单价千米7元uint wan_3w_price = 22;晚上3千米外的单价千米2.2元uint wan_wait_price = 10;晚上等待时的单价分钟1元uint dista nee = 0;行使的距离uint zon g_jia;总的价bit flag_300ms = 0;bit flag_1s ;bit flag_time_e n = 0;#i nclude lcd1602._3l_price % 256);

7、保存数据write_24c02(8,wan_3l_price 256);保存数据write_24c02(9,wan_3w_price % 256);保存数据write_24c02(10,wan_3w_price 256);保存数据write_24c02(11,wan_wait_price % 256);保存数据write_24c02(12,wan_wait_price 256);保存数据*自动初始化保存的数据*void zid on g_chushifa_iic()value = read_24c02(200);value = read_24c02(200);if(value != 0x91)

8、value = 0x91;新的单片机初始单片机内问EEPOMwrite_iic_data();write_24c02(200,value);保存数据 delay_1ms(300);*读出来保存的数据*void read_iic_data()flag_bai_3l_price = read_24c02(8);wan_3l_price = wan_3l_price * 256 + read_24c02 ； wan_3w_price = read_24c02(10);wan_3w_price = wan_3w_price * 256 + read_24c02(9);wan_wait_price =

9、read_24c02(12);wan_wait_price = wan_wait_price * 256 + read_24c02(11);*独立按键处理函数*#defi ne key_io P2uchar key_can;void key()static uchar key_ new = 0,key_old = 0,key_value = 0; key_io |= 0x3f;if(key_new = 0)按键松开if(key_io & 0x3f) = 0x3f)key_value +;elsekey_value = 0;if(key_value = 5)按键松开松手检测key_value =

10、 0;key_new = 1;按键松开后进入等待按键状态elseif(key_io & 0x3f) != 0x3f)按键按下key_value +;elsekey_value =0;if(key_value = 5)按键按下消抖key_value = 0;key_new = 0;按键松开后进入等待松开按键状态key_ca n = 20;if(key_new = 0) & (key_old = 1)switch(key_io & 0x3f)case 0x3e: key_can = 1;break;得到按键值case 0x3d: key_can = 2;break;得到按键值case 0x3b:

11、key_can = 3;break;得到按键值case 0x37: key_can = 4;break;得到按键值case 0x1f: key_can = 5; break;得到按键值按键按下显示按键值write_sfm2(2,0,key_ca n);key_old = key_ new;#i nclude me nu. = 6)dista nee +; write_sfm4(1,0,dista nee);if(key_can = 5)清零 从新计价flag_time_e n = 0;shi = 0;fen = 0;miao = 0;zon g_jia = 0;dista nee = 0;if

12、(key_ca n = 2)flag_time_e n = flag_time_e n;if(flag_300ms = 1)flag_300ms = 0;if(dista nee = 30)3 公里内的价格if(flag_bai_ = 3)zon g_jia = bai_3l_price;elsezon g_jia = bai_3l_price + (shi * 60 + fen - 3) bai_wait_price;elseif(fen = 3)zon g_jia = wan _3l_price;elsezon g_jia = wan _3l_price + (shi * 60 + fen

13、 - 3) bai_wait_price;else3公里外的价格if(flag_bai_ = 3)zon g_jia=bai_3l_price+ bai_3w_price* (dista nee30)10 ;elsezon g_jia=bai_3l_price+ bai_3w_price* (dista nee30)10 + (shi* 60 + fen - 3) * bai_wait_price;elseif(fen = 60)miao = 0;fen +;if(fen = 60)fen = 0;shi+;if(shi = 24)shi = 0;*定时器 0 初始化程序 *void timeni t()EA = 1;TMOD = 0X01;ETO = 1