SERIAL COMMUNICATION WITH "c"

[manjula]

COULD SOME ONE HELP ME TO WRITE A CODE IN "C" TO GET A SIGNAL OF 3.5 TO 5 V ON ANY OF THE SERIAL PORTS OF A PC
AS AND WHEN REQUIRED ?

I WOULD LILKE TO USE THIS SIGNAL TO CONTROL MY HARDWARE CIRCUIT WHICH SWITCHES "ON"
WHEN IT GETS A SIGNAL (3.5 TO 5V)

PLS HELP ME

 

[zBuilder]

First, check your capslock key!!!
Second, the serial port usually puts out voltages in the range of + or - 9 to 15 volts. You cannot change the voltage down to 3 to 5 volts using ANY type of software. This is strictly a hardware issue. Maybe you should try the parallel port instead??



Kim_Christensen@telus.net

http://www3.bc.sympatico.ca/Kim_Christensen/index.html