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/**
* @example serial_port_read.cpp
*/
#include <libserial/SerialPort.h>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <unistd.h>
constexpr const char* const SERIAL_PORT_1 = "/dev/ttyUSB0" ;
/**
* @brief This example demonstrates configuring a serial port and
* reading serial data.
*/
int main()
{
using namespace LibSerial ;
// Instantiate a SerialPort object.
SerialPort serial_port ;
try
{
// Open the Serial Port at the desired hardware port.
serial_port.Open(SERIAL_PORT_1) ;
}
catch (const OpenFailed&)
{
std::cerr << "The serial port did not open correctly." << std::endl ;
return EXIT_FAILURE ;
}
// Set the baud rate of the serial port.
serial_port.SetBaudRate(BaudRate::BAUD_115200) ;
// Set the number of data bits.
serial_port.SetCharacterSize(CharacterSize::CHAR_SIZE_8) ;
// Turn off hardware flow control.
serial_port.SetFlowControl(FlowControl::FLOW_CONTROL_NONE) ;
// Disable parity.
serial_port.SetParity(Parity::PARITY_NONE) ;
// Set the number of stop bits.
serial_port.SetStopBits(StopBits::STOP_BITS_1) ;
// Wait for data to be available at the serial port.
while(!serial_port.IsDataAvailable())
{
usleep(1000) ;
}
// Specify a timeout value (in milliseconds).
size_t ms_timeout = 250 ;
// Char variable to store data coming from the serial port.
char data_byte ;
// Read one byte from the serial port and print it to the terminal.
try
{
// Read a single byte of data from the serial port.
serial_port.ReadByte(data_byte, ms_timeout) ;
// Show the user what is being read from the serial port.
std::cout << data_byte << std::flush ;
}
catch (const ReadTimeout&)
{
std::cerr << "\nThe ReadByte() call has timed out." << std::endl ;
}
// Wait a brief period for more data to arrive.
usleep(1000) ;
DataBuffer read_buffer ;
try
{
// Read as many bytes as are available during the timeout period.
serial_port.Read(read_buffer, 0, ms_timeout) ;
}
catch (const ReadTimeout&)
{
for (size_t i = 0 ; i < read_buffer.size() ; i++)
{
std::cout << read_buffer.at(i) << std::flush ;
}
std::cerr << "The Read() call timed out waiting for additional data." << std::endl ;
}
// Successful program completion.
std::cout << "The example program successfully completed!" << std::endl ;
return EXIT_SUCCESS ;
}
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