refactored outpugpiointerface

FlippR-Driver/src/input/InputGPIOInterface.cpp

@@ -0,0 +1,99 @@
+/*
+ * InputGPIOInterface.cpp
+ *
+ *  Created on: May 31, 2018
+ *      Author: Andreas Schneider, Johannes Wendel, Jonas Zeunert
+ */
+
+#include <fstream>
+#include <thread>
+
+#include "InputGPIOInterface.h"
+#include "json/json.hpp"
+#include "easylogging/easylogging++.h"
+#include "utility/config.h"
+#include <string>
+namespace flippR_driver
+{
+namespace utility
+{
+
+using namespace nlohmann;
+
+InputGPIOInterface::InputGPIOInterface(std::istream &input_config)
+{
+  init_members(input_config);
+
+  init_pins();
+}
+
+bool InputGPIOInterface::read_data(char pin)
+{
+  // setting address to read
+  write_row(pin / INPUT_MATRIX_SIZE);
+  write_col(pin % INPUT_MATRIX_SIZE);
+
+  // wait for mux to set address
+  std::this_thread::sleep_for(std::chrono::nanoseconds(INPUT_SLEEP_DURATION_NANO));
+
+  return read_pin(this->data_address);
+}
+
+void InputGPIOInterface::write_row(char data)
+{
+  write_pin(this->row_address_A, data & 0b001);
+  write_pin(this->row_address_B, data & 0b010);
+  write_pin(this->row_address_C, data & 0b100);
+}
+
+void InputGPIOInterface::write_col(char data)
+{
+  write_pin(this->col_address_A, data & 0b001);
+  write_pin(this->col_address_B, data & 0b010);
+  write_pin(this->col_address_C, data & 0b100);
+}
+
+void InputGPIOInterface::init_members(std::istream &input_config_stream)
+{
+  json input_config;
+  input_config_stream >> input_config;
+
+  try
+    {
+      json row_json = input_config.at("row");
+      row_address_A = row_json.at("A").get<json::number_integer_t>();
+      row_address_B = row_json.at("B").get<json::number_integer_t>();
+      row_address_C = row_json.at("C").get<json::number_integer_t>();
+
+      json col_json = input_config.at("col");
+      col_address_A = col_json.at("A").get<json::number_integer_t>();
+      col_address_B = col_json.at("B").get<json::number_integer_t>();
+      col_address_C = col_json.at("C").get<json::number_integer_t>();
+
+      data_address = input_config.at("data").get<json::number_integer_t>();
+    }
+  catch(json::type_error &e)
+    {
+      CLOG(ERROR, INPUT_LOGGER) << e.what();
+    }
+  catch(json::out_of_range &e)
+    {
+      CLOG(ERROR, INPUT_LOGGER) << e.what();
+    }
+}
+
+void InputGPIOInterface::init_pins()
+{
+  initialize_output_pin(col_address_A);
+  initialize_output_pin(col_address_B);
+  initialize_output_pin(col_address_C);
+
+  initialize_output_pin(row_address_A);
+  initialize_output_pin(row_address_B);
+  initialize_output_pin(row_address_C);
+
+  initialize_input_pin(data_address);
+}
+
+}
+}