[问答]

stc89c52rc单片机串口通信问题！

问答对人有帮助，内容完整，我也想知道答案 0 我想通过单片机完成温度与酒精浓度的测量并通过蓝牙模块进行串口通信。 #include //???????? #define uchar unsigned char //?????? ??? ????0~255 #define uint unsigned int //????? ??? ????0~65535 #include "eeprom52.h" #include #include //??????? 0 1 2 3 4 5 6 7 8 9 uchar code smg_du[]={0x28,0xee,0x32,0xa2,0xe4,0xa1,0x21,0xea,0x20,0xa0, 0x60,0x25,0x39,0x26,0x31,0x71,0xff}; //?? //??????? uchar code smg_we[]={0xef,0xdf,0xbf,0x7f,0xf7,0xfb,0xfd,0xfe}; uchar dis_smg[8] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8}; uchar smg_i = 8; //????????? uchar a_a; uchar flag,a; unsigned char flag_uart,flag_time,flag_on,a,i,t0_num,ad_val; float temp; float alcohol; *it dq = P2^3; //18b20 IO???? it beep = P2^4; //???IO??? it CS=P2^5; //CS???P1???4??,??ADC0832CS? it SCL=P2^6; //SCL???P1???3??,??ADC0832SCL? it DO=P2^7; //DO???P1???4??,??ADC0832DO? bit flag_lj_en; //?????? bit flag_lj_3_en; //???3?????? ??????? uchar key_time,key_value; //????????? bit key_500ms ; uint temperature ; // bit flag_300ms ; uchar menu_1; //??????? uint t_high = 300,t_low = 100; //???????? long dengji,s_dengji = 50; //???? #define RdCommand 0x01 //??ISP????? #define PrgCommand 0x02 #define EraseCommand 0x03 #define Error 1 #define Ok 0 #define WaitTime 0x01 //??CPU????? /*******************1ms????*************************/ void delay_1ms(uint q) { uint i,j; for(i=0;i for(j=0;j<120;j++); } /*******************?????*************************/ void delay_uint(uint q) { while(q--); } /*******************??????*************************/ void display() { static uchar i; i++; if(i >= smg_i) i = 0; P1 = 0xff; //?? P0= smg_we[i]; //?? P1 = dis_smg[i]; //?? } /**************???????????eepom?**************/ void write_eeprom() { sectorerase(0x2000); byte_write(0x2000, t_high % 256); byte_write(0x2001, t_high / 256); byte_write(0x2002, t_low % 256); byte_write(0x2003, t_low / 256); byte_write(0x2004, s_dengji % 256); byte_write(0x2005, s_dengji / 256); byte_write(0x2055, a_a); } /**************?????????eepom????*************/ void read_eeprom() { t_high = byte_read(0x2001); t_high <<= 8; t_high \|= byte_read(0x2000); t_low = byte_read(0x2003); t_low <<= 8; t_low \|= byte_read(0x2002); s_dengji = byte_read(0x2005); s_dengji <<= 8; s_dengji \|= byte_read(0x2004); a_a = byte_read(0x2055); } /**********??????????*************/ void init_eeprom() { read_eeprom(); //?? if(a_a != 1) //????????????eeprom { t_high = 400; t_low = 100; s_dengji = 80; a_a = 1; write_eeprom(); //???? } } /*******???????****************************************************/ unsigned char ad0832read(bit SGL,bit ODD) { unsigned char i=0,value=0,value1=0; SCL=0; DO=1; CS=0; //?? SCL=1; //?????? SCL=0; DO=SGL; SCL=1; //?????? SCL=0; DO=ODD; SCL=1; //?????? SCL=0; //?????? DO=1; for(i=0;i<8;i++) { SCL=1; SCL=0; //????????????? value<<=1; if(DO) value++; } for(i=0;i<8;i++) { //?????? value1>>=1; if(DO) value1+=0x80; SCL=1; SCL=0; } CS=1; SCL=1; if(value==value1) //???????,???????,????0 return value; return 0; } void init() { TMOD=0x21; // SCON=0x50; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TH1=0xfd; TL1=0xfd; TR1=1; ET0=1; SM0=0; SM1=1; REN=1; EA=1; ES=1; } /*******************18b20?????*************************/ void init_18b20() { bit q; dq = 1; //????? delay_uint(1); //15us dq = 0; //????? delay_uint(80); //750us dq = 1; //????? ?? delay_uint(10); //110us q = dq; //??18b20????? delay_uint(20); //200us dq = 1; //????? ???? } /*********?18b20????***********/ void write_18b20(uchar dat) { uchar i; for(i=0;i<8;i++) { //???????? dq = 0; //??????????? dq = dat & 0x01; //?18b20?????? delay_uint(5); // 60us dq = 1; //???? dat >>= 1; } } /*********??18b20????***********/ uchar read_18b20() { uchar i,value; for(i=0;i<8;i++) { dq = 0; //??????????? value >>= 1; //???????? dq = 1; //???? if(dq == 1) //?????? value \|= 0x80; delay_uint(5); //60us ???????????60us??? } return value; //???? } /*********?????? ???????************/ uint read_temp() { uint value; uchar low; //?????????????????,?????????,??????18b20??? init_18b20(); //???18b20 write_18b20(0xcc); //??64?ROM write_18b20(0x44); //?????????? delay_uint(50); //500us init_18b20(); //???18b20 write_18b20(0xcc); //??64?ROM write_18b20(0xbe); //????????? EA = 0; low = read_18b20(); //?????? value = read_18b20(); //?????? EA = 1; value <<= 8; //????????8? value \|= low; //??????????value????? value = 0.625; //?????? ?? return value; //??????? ??? } /***********???0?????***********/ void time_init() { EA = 1; //???? TMOD = 0X01; //???0????1????1 ET0 = 1; //????0?? TR0 = 1; //?????0?? } /****************??????*************/ uchar key_can; //??? void key() //?????? { static uchar key_new; key_can = 20; //????? P2 \|= 0x07; if((P2 & 0x07) != 0x07) //???? { if(key_500ms == 1) //?? { key_500ms = 0; key_new = 1; } delay_1ms(1); //????? if(((P2 & 0x07) != 0x07) && (key_new == 1)) { //??????? key_new = 0; switch(P2 & 0x07) { case 0x06: key_can = 3; break; //??k2?? case 0x05: key_can = 2; break; //??k3?? case 0x03: key_can = 1; break; //??k4?? } flag_lj_en = 1; //???? } } else { if(key_new == 0) { key_new = 1; write_eeprom(); //???? flag_lj_en = 0; //?????? flag_lj_3_en = 0; //??3???? key_value = 0; //?? key_time = 0; key_500ms = 0; } } } /************???????????***********/ void key_with() { if(key_can == 1) //??? { menu_1 ++; if(menu_1 >= 4) { menu_1 = 0; smg_i = 8; //?????8? } } if(menu_1 == 1) //?????? { smg_i = 8; //?????4? if(key_can == 2) { if(flag_lj_3_en == 0) t_high ++ ; //???????????? else t_high += 10; //???????????????????10 if(t_high > 990) t_high = 990; } if(key_can == 3) { if(flag_lj_3_en == 0) t_high -- ; //???????????? else t_high -= 10; //???????????????????10 } dis_smg[7] = smg_du[t_high % 10]; //????? dis_smg[6] = smg_du[t_high / 10 % 10] & 0xdf; //????? dis_smg[5] = smg_du[t_high / 100 % 10] ; //????? dis_smg[4] = 0x64; //H dis_smg[0] = smg_du[t_low % 10]; //????? dis_smg[1] = smg_du[t_low / 10 % 10] & 0xdf; //????? dis_smg[2] = smg_du[t_low / 100 % 10] ; //????? dis_smg[3] = 0x3D; //L } if(menu_1 == 2) //?????? { smg_i = 8; //?????4? if(key_can == 2) { if(flag_lj_3_en == 0) t_low ++ ; //???????????? else t_low += 10; //???????????????????10 if(t_low >= t_high) t_low = t_high - 1; } if(key_can == 3) { if(flag_lj_3_en == 0) t_low -- ; //???????????? else t_low -= 10; //???????????????????10 if(t_low <= 10) t_low = 10; } dis_smg[0] = smg_du[t_low % 10]; //????? dis_smg[1] = smg_du[t_low / 10 % 10] & 0xdf; //????? dis_smg[2] = smg_du[t_low / 100 % 10] ; //????? dis_smg[3] = 0x3D; //L } if(menu_1 == 3) //???????? { smg_i = 8; //?????4? if(key_can == 2) { if(flag_lj_3_en == 0) s_dengji ++ ; //???????????? else s_dengji += 10; //???????????????????10 } if(key_can == 3) { if(flag_lj_3_en == 0) s_dengji -- ; //???????????? else s_dengji -= 10; //???????????????????10 } dis_smg[0] = smg_du[s_dengji % 10]; //????? dis_smg[1] = smg_du[s_dengji / 10 % 10] ; //????? dis_smg[2] = smg_du[s_dengji / 100 % 10] ; // dis_smg[3] = 0x60; //a } } /************????***********/ void clock_h_l() { static uchar value; if((temperature <= t_high)\|\| (dengji >= s_dengji) \|\| (temperature >= t_high)) { beep = ~beep; //????? } else { beep = 1; } } /************???************/ void main() { delay_1ms(150); P0 = P1 = P2 = 0xff; temperature = read_temp(); //??????? init(); init_eeprom(); //?????????? delay_1ms(650); temperature = read_temp(); //??????? dis_smg[7] = smg_du[temperature % 10]; //???????? dis_smg[6] = smg_du[temperature / 10 % 10] & 0xdf; //???????? dis_smg[5] = smg_du[temperature / 100 % 10] ; //????????6 time_init(); //?????? while(1) { key(); //???? if(key_can < 10) { key_with(); //?????? } if(flag_300ms == 1) //300ms ???????? { flag_300ms = 0; temperature = read_temp(); //??????? clock_h_l(); dengji = ad0832read(1,0); dengji = dengji 450 / 255.0; dengji = dengji - 100; //????????,???100mV if(dengji < 0) dengji = 0; dengji = dengji * 2; //?mV???mg/L,?????? //?????0.1V,???????????20ppm //1ppm=1mg/kg=1mg/L=1×10-6 ?????????,??????? if(menu_1 == 0) { smg_i = 8; dis_smg[7] = smg_du[temperature % 10]; //???????? dis_smg[6] = smg_du[temperature / 10 % 10] & 0xdf; //???????? dis_smg[5] = smg_du[temperature / 100 % 10] ; //???????? dis_smg[4] = 0xff; dis_smg[3]=smg_du[dengji/1000%10]; //?? dis_smg[2]=smg_du[dengji/100%10]; //?? dis_smg[1]=smg_du[dengji/10%10]; //?? dis_smg[0]=smg_du[dengji%10]; //?? ADC0832?8?ADC,???0~255,????????l_tmpdate????? } } if(flag_uart==1) { flag_uart=0; ES=0; TI=1; switch(flag_on) { case 0: puts("openn"); TR0=1; break; case 1: printf("close!n"); TR0=0; break; case 2: puts("Error!n"); break; } while(!TI);//???? TI=0; ES=1; } if(flag_time==1) { flag_time=0; temperature = read_temp(); dengji = ad0832read(1,0); ES=0; TI=1; printf("The temp is %fVn",temperature); printf("The alcohol is %fVn",dengji); while(!TI); TI=0; ES=1; } } } /***********???0??????*************/ void time0_int() interrupt 1 { static uchar value; //??2ms???? TH0 = 0xf8; TL0 = 0x30; //2ms display(); //??????? value++; if(value >= 150) { value = 0; flag_300ms = 1; } if(flag_lj_en == 1) //?????? { key_time ++; if(key_time >= 250) //500ms { flag_time=1; key_time = 0; key_500ms = 1; //500ms key_value ++; if(key_value > 3) { key_value = 10; flag_lj_3_en = 1; //3??1.5????? } } } } void ser() interrupt 4 { RI=0; a=SBUF; flag_uart=1; if(a==1) flag_on=0; else if(a==2) flag_on=1; else flag_on=2; } 这是我的程序，我想请大家帮我看看哪里有问题，我已经完成了数码管显示温度和酒精浓度，只是串口通信部分的问题了！不太懂串口，现在每次手机输入指令，单片机不回数据 1
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