MẠCH ĐO NHIỆT ĐỘ HIỂN THỊ LCD #include "C:\Program Files\PICC\Devices\16F877A.h" #include "C:\Program Files\PICC\Devices\def_877a.h" #device *=16 ADC=10 #FUSES NOWDT, HS, NOPUT, NOBROWNOUT, NOLVP, NOCPD, NOWRT, NODEBUG #use delay(clock=12000000) long value,nhietdo; int8 a,b,c,d,i; void tachhang(int&a,int&b,int&c,int&d); char so[11] ="0123456789"; #define RS RA3 #define RW RA2 #define E RA1 #define BF RB7 #define LCD PORTB char chu[9] ="nhietdo="; #use fast_io(b) #define tocdo0 0 //toc do bang 0 #define td_macdinh 80 //toc do mac dinh #define tocdo1 207 //1/3 toc do cuc dai #define tocdo2 514 //2/3 toc do cuc dai #define tocdo3 620 //toc do cuc dai int16 duty1=0; int16 duty2=0; int8 bientocdo=0; int1 bienthuan=0; int1 biennghich=0; /*Ham yeu cau goi lenh dieu khien LCD*/ void comnwrt(void) { RS = 0; RW = 0; E = 1; E = 0; delay_ms(2); } /*Ham yeu cau goi du lieu hien thi len LCD*/ void datawrt(void) { RS = 1; RW = 0; E = 1; E = 0; delay_ms(2); } void main() { set_tris_A(0); set_tris_B(0); delay_ms(100); LCD = 0x30; comnwrt(); while(true) { bit_set(portA,5); setup_adc(adc_clock_internal); setup_adc_ports(AN0); set_adc_channel(0); delay_ms(100); value=read_adc(); nhietdo=(value-559)/2.024; tachhang(a,b,c,d); delay_ms(1); LCD = 0x0C; comnwrt(); LCD = 0x06; comnwrt(); LCD = 0x83; comnwrt(); delay_ms(10); for (i=0;i<9;i++) { lcd=chu[i]; datawrt(); } lcd=so[c]; datawrt(); lcd=so[d]; datawrt(); lcd ='o'; datawrt(); lcd ='C'; datawrt(); } } void tachhang(int&a,int&b,int&c,int&d) { a=nhietdo/1000; b=(nhietdo%1000)/100; c=(nhietdo%100)/10; d=nhietdo%10; } . MẠCH ĐO NHIỆT ĐỘ HIỂN THỊ LCD #include "C:Program FilesPICCDevices16F877A.h" #include "C:Program. bit_set(portA,5); setup_adc(adc_clock_internal); setup_adc_ports(AN0); set_adc_channel(0); delay_ms(100); value=read_adc(); nhietdo=(value-559)/2.024; tachhang(a,b,c,d); delay_ms(1); LCD = 0x0C; comnwrt(); LCD = 0x06; comnwrt(); LCD = 0x83; comnwrt(); delay_ms(10); for (i=0;i<9;i++) { lcd= chu[i]; datawrt(); } lcd= so[c]; datawrt(); lcd= so[d]; datawrt(); lcd ='o'; datawrt(); lcd. biennghich=0; /*Ham yeu cau goi lenh dieu khien LCD* / void comnwrt(void) { RS = 0; RW = 0; E = 1; E = 0; delay_ms(2); } /*Ham yeu cau goi du lieu hien thi len LCD* / void datawrt(void) { RS = 1; RW =