From 1cf0d4c224b32e31d9cd9ba3a4719f57118321fb Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Tue, 3 Mar 2015 23:11:26 +0100
Subject: o An app to read the serial port and parse its values. Not very
 useful yet.

---
 apps/CMakeLists.txt     |  12 ++--
 apps/sm-serial-read.cpp | 162 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 168 insertions(+), 6 deletions(-)
 create mode 100644 apps/sm-serial-read.cpp

diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index ab9c529..7fa9443 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -2,16 +2,16 @@ set(APPS
     ble-inspect-device
     sm-db-insert
     sm-db-select
-    sm-get-value)
+    sm-get-value
+    sm-serial-read)
 
-set(APPS ${APPS} log4cplus-test)
+list(APPEND APPS log4cplus-test)
 
-set(shared_sources
-        SoilMoisture.cpp
-        apps.cpp)
+list(APPEND shared_sources SoilMoisture.cpp)
+list(APPEND shared_sources apps.cpp)
 
 # Boost
-find_package(Boost COMPONENTS system program_options REQUIRED)
+find_package(Boost COMPONENTS regex system program_options REQUIRED)
 
 # Bluez
 pkg_check_modules(BLUEZ bluez REQUIRED)
diff --git a/apps/sm-serial-read.cpp b/apps/sm-serial-read.cpp
new file mode 100644
index 0000000..8d5e70b
--- /dev/null
+++ b/apps/sm-serial-read.cpp
@@ -0,0 +1,162 @@
+#include <iostream>
+#include <iomanip>
+#include <chrono>
+#include <thread>
+#include <boost/asio/serial_port.hpp>
+#include <boost/regex.hpp>
+#include "json.hpp"
+#include "apps.h"
+
+enum class Format {
+    PLAIN,
+    JSON,
+    SQL
+};
+
+void validate(boost::any &v, const std::vector<std::string> &values, Format *, int) {
+    using namespace boost::program_options;
+
+    const std::string &s = validators::get_single_string(values);
+
+    if (s == "plain") {
+        v = boost::any(Format::PLAIN);
+    } else if (s == "json") {
+        v = boost::any(Format::JSON);
+    } else if (s == "sql") {
+        v = boost::any(Format::SQL);
+    } else {
+        throw validation_error(validation_error::invalid_option_value);
+    }
+}
+
+namespace boost {
+
+template<>
+std::string lexical_cast(const Format &arg) {
+    if (arg == Format::PLAIN)
+        return "plain";
+    else if (arg == Format::JSON)
+        return "json";
+    else if (arg == Format::SQL)
+        return "sql";
+    else
+        throw std::runtime_error("Unknown format value: " + lexical_cast<std::string>(arg));
+}
+
+}
+
+namespace trygvis {
+namespace apps {
+
+using namespace boost::asio;
+using namespace std;
+using namespace std::chrono;
+using namespace trygvis::apps;
+namespace po = boost::program_options;
+using json = nlohmann::json;
+
+class sm_serial_read : public app {
+
+    Format format;
+
+    class port_handler {
+    public:
+        port_handler(serial_port &serial_port) : port(serial_port) {
+        }
+
+        void run() {
+            auto packet = make_shared<vector<uint8_t>>(1024);
+
+            while (port.is_open()) {
+                size_t some = port.read_some(buffer);
+                for (int i = 0; i < some; i++) {
+                    uint8_t b = data[i];
+
+                    if (b == packet_delimiter) {
+                        on_packet(packet);
+                        packet = make_shared<vector<uint8_t>>(1024);
+                    } else {
+                        packet->emplace_back(b);
+                    }
+                }
+            }
+
+            cout << "port closed" << endl;
+        }
+
+        void on_packet(shared_ptr<vector<uint8_t>> packet) {
+            auto s = std::string((char *) packet->data(), packet->size());
+            cout << "packet: " << s << endl;
+
+            static const boost::regex e("#(\\d+) = (\\d+)");
+
+            std::string::const_iterator start = s.begin();
+            std::string::const_iterator end = s.end();
+            boost::match_results<std::string::const_iterator> what;
+            boost::match_flag_type flags = boost::match_default;
+
+            while(regex_search(start, end, what, e, flags)) {
+                auto sensor = what[1];
+                auto value = what[2];
+                start = what[0].second;
+
+                cout << "sensor #" << sensor << " = " << value << endl;
+
+                flags |= boost::match_prev_avail;
+                flags |= boost::match_not_bob;
+            }
+        }
+
+    private:
+        static const size_t size = 1024;
+        static const uint8_t packet_delimiter = '\n';
+        uint8_t data[size];
+        mutable_buffers_1 buffer = boost::asio::buffer(data, size);
+        serial_port &port;
+    };
+
+public:
+    void add_options(po::options_description_easy_init &options) override {
+        options
+                ("help", "produce help message")
+                ("port", po::value<string>()->required(), "The serial port to read")
+                ("format", po::value<Format>(&format)->default_value(Format::PLAIN), "Output format");
+    }
+
+    int main(app_execution &execution) override {
+        auto desc = execution.desc;
+        auto vm = execution.vm;
+
+        uint32_t baud_rate = 115200;
+        auto port_name = vm["port"].as<string>();
+
+        io_service io_service;
+
+        serial_port port(io_service, port_name);
+        port.set_option(serial_port_base::baud_rate(baud_rate));
+        port.set_option(serial_port_base::character_size(8));
+        port.set_option(serial_port_base::flow_control(serial_port_base::flow_control::none));
+        port.set_option(serial_port_base::parity(serial_port_base::parity::even));
+        port.set_option(serial_port_base::stop_bits(serial_port_base::stop_bits::two));
+
+        if (port.is_open()) {
+            cout << "port is open" << endl;
+        } else {
+            cout << "port is not open" << endl;
+        }
+
+        port_handler(port).run();
+
+        return EXIT_SUCCESS;
+    }
+
+};
+
+}
+}
+
+using namespace trygvis::apps;
+int main(int argc, char *argv[]) {
+    sm_serial_read app;
+    return launch_app(argc, argv, app);
+}
-- 
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