#include <At89x52.h> /* special function register declarations */ #include <stdio.h> /* prototype declarations for I/O functions */
void main (void) { /*------------------------------------------------ Setup the serial port for 9600 baud at 11.0592MHz. ------------------------------------------------*/
TR1 = 0; SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */ TMOD |= 0x20; /* TMOD: timer 1, mode 2, 8-bit reload */ PCON &= 0x7F; TH1 = 0xFD; /* TH1: reload value for 9600 baud @ 11.0592MHz */ // EA = 1; // ES = 1; RI = 1; TI = 1; TR1 = 1; /*------------------------------------------------ Note that an embedded program never exits (because there is no operating system to return to). It must loop and execute forever. ------------------------------------------------*/
printf ("hallo\r"); <=- with this line it doesn't work anymore !!!!!!!!!!!!!!!!! while (1) { TI = 0; SBUF = 'A'; while (!TI); P1 ^= 0xFF; TI=0; SBUF = '*'; while (!TI); TI=0; SBUF = '\r'; while (!TI); } }
i dont understand the program below the haloo line. plz give the details