Heys guys,
Attempting to do a heartbeat code,I've seen a whole load of various heartbeat programs on various websites so I'm trying to work with one thats seems the easiest to read,I've edited it around to suit my needs.
Its pretty much just take in value from sensor,do calculation,output result to lcd.
I think this only works as a pulse counter though so to calculate the beats per minute a time reference is needed I think.Code:#include reg51.h //#include void _nop_(void); #define delay_us _nop_();//generates 1 microsecond #define LCD P3 sbit RS=P2^0;//connect p0.0 to rs pin of lcd sbit EN=P2^2;//connect p0.1 to en pin of lcd sbit RW=P2^1; sbit PULSE=P0^0;//pulse input from heart beat sensor //sbit LED=P1^0; //led indicator for pulse indication void integer_lcd(int); void init_lcd(void); void cmd_lcd(unsignedchar); void write_lcd(unsignedchar); void delay_ms(unsignedint); unsignedint num=0; unsignedint num1=0; unsignedint dig_1,dig_2,dig_3,dig_4,test=0; unsignedint dig_11,dig_21,dig_31,dig_41,test1=0,test2=0; unsignedchar k=0; void main(void) { init_lcd(); //LED=0; write_lcd('H'); write_lcd('E'); write_lcd('A'); write_lcd('R'); write_lcd('T'); write_lcd(' '); write_lcd('B'); write_lcd('E'); write_lcd('A'); write_lcd('T'); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); cmd_lcd(0xc0); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd(' '); write_lcd('C'); write_lcd('O'); write_lcd('U'); write_lcd('N'); write_lcd('T'); write_lcd('E'); write_lcd('R'); delay_ms(300); cmd_lcd(0x01); write_lcd('B'); write_lcd('e'); write_lcd('a'); write_lcd('t'); write_lcd('s'); write_lcd(':'); write_lcd(48); write_lcd(48); write_lcd(48); write_lcd(48); while(1) { if(PULSE==1)//check for input pulse from sensor { cmd_lcd(0x01); test++; num=test; dig_4=num%10; num=num/10; dig_3=num%10; num=num/10; dig_2=num%10; dig_1=num/10; if(test==9999) test=0; write_lcd('B'); write_lcd('e'); write_lcd('a'); write_lcd('t'); write_lcd('s'); write_lcd(':'); write_lcd(dig_1+48); write_lcd(dig_2+48); write_lcd(dig_3+48); write_lcd(dig_4+48); //LED=1; delay_ms(50); //LED=0; } } } //////////////////////////////////////////////////////////////// void init_lcd(void) { delay_ms(10);//delay 10 milliseconds cmd_lcd(0x38);//8 bit initialize, 5x7 character font, 16x2 display cmd_lcd(0x0e);//lcd on, cursor on cmd_lcd(0x06);//right shift cursor automatically after each character is displayed cmd_lcd(0x01);//clear lcd } //transmit command or instruction to lcd void cmd_lcd(unsignedchar c) { EN=1; RW=0;//set enable pin RS=0;//clear register select pin LCD=c;//load 8 bit data EN=0;//clear enable pin delay_ms(2);//delay 2 milliseconds } //transmit a character to be displayed on lcd void write_lcd(unsignedchar c) { EN=1;//set enable pin RW=0; RS=1;//set register select pin LCD=c;//load 8 bit data EN=0;//clear enable pin delay_ms(2);//delay 2 milliseconds } //generates delay in milli seconds void delay_ms(unsignedint i) { unsignedint j; while(i-->0) { for(j=0;j<500;j++) { ; } } }
When I load it onto my chip,the welcome message comes up on the lcd and then everytime I put my finger on the lrd the no of beats increment by 1 on the lcd screen.
