hi members... i'm programming assembler and likewise c. a practical training force me to write assembler in c. the serial port names P3.1 and i can send every time 8 bit (2bit = start- and stopbit and the last 6 bit's are data). i must abide the exactly speed (baudrate) for my pc and microcontroller. in assembler is that very easy because i can use the cycle's. i have realized the delay with loops in c but the loops are very inexactly! i've got the answer to use the processortime or related. How!?!?! thank's for you sympathy yours sincerely nick
"yes i'm working with rs232" I assume that means you are communicating with a 'normal' PC serial port? In that case, use the UART. You don't need to bit bang. If it is an assignment that forbids use of the UART then post your complete, compilable code and someone will probably offer some help.