count_mile.c

用单片机实现LCD显示字符和图形

#include "reg51.h"
#include "count_mile.h"

//计算行驶里程的子程序
/*
void count_mile()
{   
    //unsigned int run_start_mile,mile_this_time_meter,mile_this_time_kilometer;
	long run_cycle,mile_this_time;
	unsigned int total_meter_temp,total_mile_temp;
//    run_start_mile=10009;//07年行驶的里程数，

    run_cycle=(3000*run_k+run)/3;//行驶的周数
//    mile_this_time=run_cycle*meter_per_cycle;
    mile_this_time=run_cycle*1.414;
    mile_this_time_meter=mile_this_time%1000;
    mile_this_time_kilometer=mile_this_time/1000;
//===============================================当前行驶的公里和米数
//===============================================总行驶的公里和米数   

//==============================假设：read_from_eeprom_meter=999米
//====================================read_from_eeprom_mile=9999公里
    read_from_eeprom_meter=999;
    read_from_eeprom_mile=9999;

    total_meter_temp=mile_this_time_meter    +read_from_eeprom_meter;
	total_mile_temp =mile_this_time_kilometer+read_from_eeprom_mile ;
  
	if(total_meter_temp>=1000)
	   {
	   total_meter=total_meter_temp-1000;
       total_mile =total_mile_temp+1;
	   }
    if(total_meter_temp<1000)
	   {
	   total_meter=total_meter_temp;
       total_mile =total_mile_temp;
	   }
}

*/