自制BMS监控仪通过485通讯读BMS信息并显示在LCD2004上单片机源程序电路 -

#include "STC89C54.h"
#define uint unsigned int
#define uchar unsigned char
uchar code welcome1[]="BMS Monitor";
uchar code welcome2[]="RichPower";
uchar code waiting[]="CONNECTING...";
uchar code menu_table1[]="CELL VOLTAGE"; //12个字符
uchar code menu_table2[]="TEMPERATURE"; //11个字符
uchar code menu_table3[]="BMS STATUS"; //10个字符
uchar code menu_table4[]="ALARM INFO"; //10个字符
uchar code BMSINFO1[20]={0x7E,0x32,0x36,0x30,0x30,0x34,0x36,0x46,0x32,0x45,0x30,0x30,0x32,0x30,0x31,0x46,0x44,0x31,0x45,0x0D}; //询遥测的命令报文
uchar code BMSINFO2[20]={0x7E,0x32,0x36,0x30,0x30,0x34,0x36,0x46,0x34,0x45,0x30,0x30,0x32,0x30,0x31,0x46,0x44,0x31,0x43,0x0D}; //询遥信命令报文
uchar buffer[145]={0}; //用于缓存遥测报文
sbit lcdrs=P2^5; //指令和数据寄存器选择，高电平时为数据，低电平选择命令
sbit lcdrw=P2^6; //读写选择，高电平为读，低电平为写
sbit lcden=P2^7; //使能
sbit lcdbg=P2^4; //背光,0为开
sbit beep=P2^0; //蜂鸣器，0为开
sbit key1=P1^0; //菜单或确认
sbit key2=P1^1; //上一项
sbit key3=P1^2; //下一项
sbit key4=P1^3; //返回或背光开关
bit data datareceived_flag=0,displayclear=1; //datareceived_flag为遥测报文是否接收完的标志位，current_bit为电流值符号标志位
bit data current_bit,celltemp_unit,envtemp_unit,mostemp_unit;
uchar data num;
uchar data i=0,watchdog=0,end_position;
uint single_max,single_min,totalvoltage,current,totalcap,remaincap;
uint data remaincap2;
uchar digit0,digit1,digit2,digit3,digit4; //LCD显示数字的万千百十个位
uchar cellnumber,cellnumber_offset,address_offset; //串数，串数差，地址偏移量
uchar cappercentage; //SOC
uint singlevoltage[15]; //单体电芯电压
uint temperature[5]; //4个电芯温度和环境温度及功率温度
uchar display_mode=0,menu_position=1,singlevoltage_page=1; //显示模式
void delayms(uint z) //延时子程序
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com) //LCD1602写命令函数
{
lcdrs=0; //rs低电平为写命令
P0=com;
delayms(4);
lcden=1; //EN先置高电平
delayms(4);
lcden=0; //短暂延时后EN置低电平
}
void write_dat(uchar dat) //LCD1602写数据函数
{
lcdrs=1; //rs高电平为写数据
P0=dat;
delayms(4);
lcden=1;
delayms(4);
lcden=0;
}
void UsartInit() //串口初始化
{
SCON=0X50; //设置为工作方式1
TMOD=0X20; //设置计数器工作方式2
PCON=0X80; //波特率加倍
TH1=0XFA; //计数器初始值设置，注意11.0592Mhz波特率是9600的
TL1=0XFA;
ES=1; //打开接收中断
EA=1; //打开总中断
TR1=1; //打开计数器
}
void init() //LCD初始化及开机界面
{
lcdrw=0;
lcden=0;
P0=0;
write_com(0x38);
write_com(0x0f); //初始化，开显示，开光标，开光标闪烁
write_com(0x06); //初始化，读写一个字符后地址指针自动加1
write_com(0x01); //清屏
// write_com(0x80); //数据地址指针从0开始
lcdbg=0; //开背光
write_com(0x0C); //关光标
/**********************欢迎界面**************************/
write_com(0x80+0x44); //第2行第5个字符
for(num=0;num<11;num++)
write_dat(welcome1[num]);
write_com(0x94+0x05); //第3行第6个字符
for(num=0;num<9;num++)
write_dat(welcome2[num]);
delayms(1000);
beep=0;
delayms(60);
beep=1;
/********************************************************/
}
/********************************************************************************
计算报文缓存中的一个字节
********************************************************************************/
uchar buffer_byte_process(uchar buffer_address)
{
uchar byte_value;
if(buffer[buffer_address]<=0x39)
buffer[buffer_address]=buffer[buffer_address]-0x30; //若为0~9的字符，减0x30即为数值
else
buffer[buffer_address]=buffer[buffer_address]-0x37; //若为大于9即为A~F的字符，减0x37即为数值
if(buffer[buffer_address+1]<=0x39)
buffer[buffer_address+1]=buffer[buffer_address+1]-0x30;
else
buffer[buffer_address+1]=buffer[buffer_address+1]-0x37;
byte_value=(buffer[buffer_address]<<4)|buffer[buffer_address+1];
return byte_value;
}
/********************************************************************************
计算报文缓存中的一个字
********************************************************************************/
uint buffer_word_process(uchar buffer_address)
{
uint word_value;
if(buffer[buffer_address]<=0x39)
buffer[buffer_address]=buffer[buffer_address]-0x30; //若为0~9的字符，减0x30即为数值
else
buffer[buffer_address]=buffer[buffer_address]-0x37; //若为大于9即为A~F的字符，减0x37即为数值
if(buffer[buffer_address+1]<=0x39)
buffer[buffer_address+1]=buffer[buffer_address+1]-0x30;
else
buffer[buffer_address+1]=buffer[buffer_address+1]-0x37;
if(buffer[buffer_address+2]<=0x39)
buffer[buffer_address+2]=buffer[buffer_address+2]-0x30; //若为0~9的字符，减0x30即为数值
else
buffer[buffer_address+2]=buffer[buffer_address+2]-0x37; //若为大于9即为A~F的字符，减0x37即为数值
if(buffer[buffer_address+3]<=0x39)
buffer[buffer_address+3]=buffer[buffer_address+3]-0x30;
else
buffer[buffer_address+3]=buffer[buffer_address+3]-0x37;
word_value=(buffer[buffer_address]<<12)|(buffer[buffer_address+1]<<8)|(buffer[buffer_address+2]<<4)|buffer[buffer_address+3];
return word_value;
}
void buffer_value_process()
{
cellnumber=buffer_byte_process(17); //串数计算
cellnumber_offset=16-cellnumber; //串数与16串相比的差值
address_offset=cellnumber_offset*4; //报文地址偏移量
current=buffer_word_process(109-address_offset); //电流计算
current_bit=current>>15; //电流正负判断
if(current_bit==1)
current=~current+1; //电流值为补码，负数取反加1得到原码（符号位1取反变成了0）；
totalvoltage=buffer_word_process(113-address_offset); //总压计算
for(num=0;num<=15-cellnumber_offset;num++) //单体电压和最高最低电压计算
{
singlevoltage[num]=buffer_word_process(19+4*num); //各串单体电压
if(num==0)
{
single_max=singlevoltage[0];
single_min=single_max;
}
if(singlevoltage[num]>single_max)
single_max=singlevoltage[num]; //最高单体电压
if(singlevoltage[num]<single_min)
single_min=singlevoltage[num]; //最低单体电压
}
remaincap=buffer_word_process(117-address_offset); //剩余容量
remaincap2=remaincap;
totalcap=buffer_word_process(123-address_offset)/100; //总容量
cappercentage=(remaincap/totalcap)&0xFF; //SOC计算
for(num=0;num<=5;num++) //6个温度计算
temperature[num]=buffer_word_process(85+4*num-address_offset); //此温度需减2731并判断符号
}
void main_display()
{
digit4=totalvoltage%10; //总压个位数字
digit3=totalvoltage/10%10; //总压十位数字
digit2=totalvoltage/100%10; //总压百位数字
digit1=totalvoltage/1000%10; //总压千位数字
write_com(0x80+0x02); //数据地址指针从第1行第9位开始写总压值
write_dat(digit1+0x30); //显示千位数字的ASCII码
write_dat(digit2+0x30);
write_dat('.');
write_dat(digit3+0x30);
write_dat(digit4+0x30);
write_dat('V');
digit4=current%10; //电流个位数字
digit3=current/10%10;
digit2=current/100%10;
digit1=current/1000%10;
if(current_bit==0&&digit1==0) //如果为正电流，且千位为0
{
write_com(0xc0);
write_dat(' ');write_dat(' ');
write_dat(' ');
}
if(current_bit==0&&digit1>0) //如果为正电流，且千位不为0
{
write_com(0xc0);
write_dat(' ');write_dat(' ');
write_dat(digit1+0x30);
}
if(current_bit==1&&digit1==0) //如果为负电流，且千位为0
{
write_com(0xc0);
write_dat(' ');write_dat(' ');
write_dat('-');
}
if(current_bit==1&&digit1>0) //如果为负电流，且千位不为0
{
write_com(0xc0);write_dat(' ');
write_dat('-');
write_dat(digit1+0x30);
}
write_dat(digit2+0x30);
write_dat('.');
write_dat(digit3+0x30);
write_dat(digit4+0x30);
write_dat('A');
digit4=remaincap2%10; //剩余容量个位数字
digit3=remaincap2/10%10; //十位数字
digit2=remaincap2/100%10; //百位数字
digit1=remaincap2/1000%10; //千位数字
digit0=remaincap2/10000%10; //万位数字
write_com(0x80+0x0A); //数据地址指针从第1行第10位开始写剩余容量
if(digit0>0)
write_dat(digit0+0x30); //显示万位数字的ASCII码
else
write_dat(' ');
if(digit0==0&&digit1==0)
write_dat(' '); //显示千位数字的ASCII码
else
write_dat(digit1+0x30);
write_dat(digit2+0x30);
write_dat('A');
write_dat('h');
digit4=cappercentage%10; //SOC个位数字
digit3=cappercentage/10%10; //十位数字
digit2=cappercentage/100%10; //百位数字
write_com(0x80+0x10); //数据地址指针从第1行第16位开始写剩余容量
if(digit2>0)
write_dat(digit2+0x30);
else
write_dat(' ');
if(digit2==0&&digit3==0)
write_dat(' ');
else
write_dat(digit3+0x30);
write_dat(digit4+0x30);
write_dat('%');
if(temperature[0]>=2731) //第1节电芯温度
{
celltemp_unit=1; //单位为正
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