We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
#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
for (i = 0; i < ACCEPTABLE_INPUT_COUNT; i++) { j = strcmp(acceptable_inputs[i],input); if(j==0) break; } if (j==0) { lcd_printxy(1,8,"yes"); input_pos=0; } else { lcd_printxy(1,1,"no"); input_pos=0; }
as you said i am getting problem in this part of code. it is receiving all the characters but not able to compare, it is printing "no" on the lcd.. i am not able find out why it is happening so, Sir please help me out. which step of the above code should be corrected.
@Andrew Neil
Why don't you write a bit of the code at a time and test it before doing the next bit. You stand a chance of creating a whole project that works properly.
I thought the strings from the RFID reader ended with a newline. If so - how do you handle the line breaks?
And what is the result of your debugging? Soon one month later. Own time debugging the individual parts of the program would have made you finish this project about three weeks ago. Of course, that would have required you to take regular looks in a book about the C language, when the debugger showed you that a statement didn't do what you thought it would do.
Own time debugging the individual parts of the program ... take regular looks in a book about the C language if you need to do that then what are fora for?
Of course, I AM being Ironic.
Erik