7 files changed, 179 insertions, 0 deletions

diff --git a/.clang-format b/.clang-format
new file mode 100644
index 0000000..ff96bb5
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,45 @@
+---
+AccessModifierOffset: -4
+AlignConsecutiveAssignments: 'true'
+AlignConsecutiveDeclarations: 'true'
+AlignEscapedNewlines: Left
+AlignTrailingComments: 'true'
+AlwaysBreakAfterReturnType: TopLevelDefinitions
+BreakBeforeBraces: Stroustrup
+BreakConstructorInitializers: BeforeComma
+BreakInheritanceList: BeforeComma
+ColumnLimit: '0'
+CompactNamespaces: 'false'
+Cpp11BracedListStyle: 'false'
+FixNamespaceComments: 'true'
+IncludeBlocks: Regroup
+IncludeCategories:
+    - Regex: '^.*(precomp|pch|stdafx)'
+      Priority: -1
+    - Regex: '^<.*>'
+      Priority: 1
+    - Regex: '^".*"'
+      Priority: 2
+    - Regex: '.*'
+      Priority: 3
+IndentCaseLabels: 'false'
+IndentPPDirectives: AfterHash
+IndentWidth: '4'
+IndentWrappedFunctionNames: 'false'
+KeepEmptyLinesAtTheStartOfBlocks: 'false'
+PointerAlignment: Left
+SortIncludes: 'true'
+SpaceAfterCStyleCast: 'true'
+SpaceAfterTemplateKeyword: 'false'
+SpaceBeforeAssignmentOperators: 'true'
+SpaceBeforeParens: ControlStatements
+SpaceBeforeRangeBasedForLoopColon: 'false'
+SpaceInEmptyParentheses: 'false'
+SpacesInAngles: 'false'
+SpacesInCStyleCastParentheses: 'false'
+SpacesInConditionalStatement: 'true'
+SpacesInParentheses: 'false'
+Standard: Auto
+TabWidth: '4'
+UseTab: ForIndentation
+...
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 0000000..0bceb5b
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,19 @@
+---
+Checks: "*,
+        -abseil-*,
+        -altera-*,
+        -android-*,
+        -fuchsia-*,
+        -google-*,
+        -llvm*,
+        -modernize-use-trailing-return-type,
+        -zircon-*,
+        -readability-else-after-return,
+        -readability-static-accessed-through-instance,
+        -readability-avoid-const-params-in-decls,
+        -cppcoreguidelines-non-private-member-variables-in-classes,
+        -misc-non-private-member-variables-in-classes,
+"
+WarningsAsErrors: ''
+HeaderFilterRegex: ''
+FormatStyle: none
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cd42ee3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+bin/
+obj/
diff --git a/compile_flags.txt b/compile_flags.txt
new file mode 100644
index 0000000..3ea2c1a
--- /dev/null
+++ b/compile_flags.txt
@@ -0,0 +1,10 @@
+-Wall
+-Werror
+-Wextra
+-Wconversion
+-Wdouble-promotion
+-pedantic
+-std=c++17
+-Iinclude
+-I../minmea/include
+-I/usr/local/include
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..29f8ca1
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,2 @@
+CPPFLAGS=-Wall -Werror -pedantic -std=c++17 -O2 -Iinclude -I../minmea/include -I/usr/local/include -DNDEBUG
+LDFLAGS=-L../minmea/lib -lminmea -L/usr/local/lib -lpthread
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..3f481bc
--- /dev/null
+++ b/makefile
@@ -0,0 +1,15 @@
+include config.mk
+
+bin/app: obj/main.o | bin
+        c++ $(LDFLAGS) $^ -o $@
+
+obj/%.o: src/%.cpp | obj
+        c++ $(CPPFLAGS) -c $< -o $@
+
+clean:
+        rm -rf bin obj
+
+bin obj:
+        mkdir $@
+
+.PHONY: all clean
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..e699c6a
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,86 @@
+#include <asio.hpp>
+#include <ctime>
+#include <iostream>
+#include <string>
+
+#include "minmea.h"
+
+using namespace std;
+
+// constexpr auto PORT     = "/dev/cuaU0";
+constexpr auto PORT     = "/dev/ugen0.14";
+constexpr auto BAUDRATE = 9600;
+
+namespace {
+
+auto
+read_line(asio::serial_port& com)
+{
+        for ( string result;; ) {
+                char chr = 0;
+
+                asio::read(com, asio::buffer(&chr, 1));
+                switch ( chr ) {
+                case '\r':
+                        break;
+                case '\n':
+                        return result;
+                default:
+                        result += chr;
+                }
+        }
+}
+
+string
+get_gps_timestamp(const minmea_time& time, const minmea_date& date)
+{
+        tm tm_utc{};
+        ::minmea_getdatetime(&tm_utc, &date, &time);
+
+        auto timestamp = ::timegm(&tm_utc);
+
+        tm tm_local{};
+        (void) ::localtime_r(&timestamp, &tm_local);
+
+        static const auto        buffer_size = 100;
+        array<char, buffer_size> buffer{};
+
+        (void) ::strftime(buffer.data(), buffer.size(), "%Y-%m-%d %H:%M:%S", &tm_local);
+
+        return buffer.data();
+}
+
+} // namespace
+
+int
+main()
+{
+        try {
+                asio::io_context  io_context{};
+                asio::serial_port com(io_context, PORT);
+                com.set_option(asio::serial_port::baud_rate(BAUDRATE));
+
+                for ( ;; ) {
+                        const auto line    = read_line(com);
+                        const auto nmea_id = ::minmea_sentence_id(line.c_str(), true);
+
+                        if ( nmea_id != MINMEA_SENTENCE_RMC ) {
+                                continue;
+                        }
+
+                        minmea_sentence_rmc frame{};
+                        if ( !::minmea_parse_rmc(&frame, line.c_str()) || !frame.valid ) {
+                                continue;
+                        }
+
+                        auto timestamp = get_gps_timestamp(frame.time, frame.date);
+
+                        cout << timestamp << ": $RMC floating point degree coordinates and speed: ("
+                             << ::minmea_tocoord(&frame.latitude) << "," << ::minmea_tocoord(&frame.longitude) << ") "
+                             << ::minmea_tofloat(&frame.speed) << '\n';
+                }
+        }
+        catch ( exception& e ) {
+                cerr << "io-error: " << e.what() << '\n';
+        }
+}