Log data to a file

main.cpp

 // Use of libserialport based on https://gist.github.com/Nixes/78e401234e66aa131547d7b78135271c
 
+#include <chrono>
+#include <ctime>
+#include <fstream>
+#include <iomanip>
 #include <iostream>
 #include <libserialport.h>
 
@@ -30,6 +34,8 @@ int main() {
     constexpr uint32_t byte_buffer_size = 512;
     char byte_buffer[byte_buffer_size];
 
+    std::ofstream output_file = std::ofstream("data.csv");
+
     struct sp_port *port;
     std::cout << "Opening port " << desired_port << '\n';
     sp_return error = sp_get_port_by_name(desired_port, &port);
@@ -48,7 +54,16 @@ int main() {
                         //if (byte_buffer[i] == '1') {
                         //    button_pressed = true;
                         //}
-                        std::cout << byte_buffer[i];
+                        output_file << byte_buffer[i];
+                        //std::cout << byte_buffer[i];
+                        if (byte_buffer[i] == '\n') {
+                            output_file << std::flush;
+                            auto const chrono_time = std::chrono::system_clock::now();
+                            std::time_t time = std::chrono::system_clock::to_time_t(chrono_time);
+                            std::tm local_time = *std::localtime(&time);
+                            output_file << std::put_time(&local_time, "%Y/%m/%d %H:%M:%S") << ", ";
+                            //std::cout << std::put_time(&local_time, "%Y/%m/%d %H:%M:%S") << ", ";
+                        }
                     }
                     //std::cout << '\n';
                     /*