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#include<reg51.h> void boud_rate() { SCON = 0x50; TMOD = 0x20; /* timer 1, mode 2, 8-bit reload */ TH1 = 0xFD; /* reload value for 2400 baud */ TR1 = 1; TI = 1; } char serial_receive() { char chr; /* variable to hold the new character */ while (RI != 1) {;} chr = SBUF; RI = 0; return(chr); } void main(void) { boud_rate(); unsigned char rx_data; for(;;) { rx_data = serial_receive(); switch(rx_data) { // case '1': open_door(); case 0067892341 : open_door(); break; // case '9': open_door(); case 0045780034 : open_door(); break; default: dont_open(); } proper_delay(); } }
errors
'rx_data':undefined identifier illigal octal digit
please tell me how to overcum these errors
OK, I'll lead you by the nose
did it hurt when you put the ring in?
... is that he REFUSES to read a C book before "writing" 'C'. His posts smell highly of "writing" 'C' after "studying" a couple of 'C' programs.
answer his most basic questions and he will be back tomorrow with "what is up on a resistor?"
I DO believe in helping posters, but the OPs questions show a fundamental lack of understanding the most basic aspects of programming.
Erik