Basic Serial Port Programming In C
Pic Serial Port Programming In C
. (I) Programming serial port communications.Connections and operating system symbolic namesA serial port is a communication physical interface through which information transfers in or out one bit at a time (in contrast to a parallel port) being, more or less compliant, with the standard.But serial port communications aren’t only useful for wired DE-9 connectors. It also allows us to use it with USB (ftdi), Bluetooth (serial profile) and Zigbee using.Serial and virtual serial ports appear as COMx in Windows operating systems (COM1, COM2, ) andin UNIX/Linux as ttySx or ttyUSBx or even ttyACMx (ttyS0, ttyS1, ttyUSB0, ttyUSB1, ttyACM0, ttyACM1,).For programming purposes we usually want to communicate computers with others computers, microcontrollers or other devices like GPS, LED or LCD displays.Serial port programming in C/C, Windows and LinuxUsing the serial port is a lot easier, but sometimes tricky.
Serial Port C++ Example
The problem has been fixed!Apparently, the device was waiting for an end-line terminator, which was not available in char writebuffer = 'READ?' ;Therefore when it received such a command, the bus would 'hang' and in order for it to work again one would have to open the port again.This also explains why the echo 'READ?' /dev/ttyUSB0 command worked - since it automatically outputs an end-line terminator.I attach the working code below - thank you everyone for your commments and kind help!