Blinker

implemented character device class
Parent 2b9666b
Stefan Schuermans

Stefan Schuermans commited on 2011-12-11 20:22:55
Showing 2 changed files, with 176 additions and 0 deletions.

src/linux/Device.cpp
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+/* Blinker
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+   Copyright 2011 Stefan Schuermans <stefan@blinkenarea.org>
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+   Copyleft GNU public license - http://www.gnu.org/copyleft/gpl.html
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+   a blinkenarea.org project */
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+
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+#include <fcntl.h>
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+#include <sys/stat.h>
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+#include <sys/types.h>
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+#include <string>
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+#include <strings.h>
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+#include <termios.h>
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+#include <unistd.h>
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+
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+#include "Device.h"
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+#include "Io.h"
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+#include "SerCfg.h"
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+
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+namespace Blinker {
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+
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+/**
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+ * @brief constructor
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+ * @param[in] path path to device
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+ */
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+Device::Device(const std::string &path)
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+{
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+  // open device
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+  m_fd = open(path.c_str(), O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
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+}
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+
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+/// destructor
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+Device::~Device()
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+{
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+  // exit if not initialized
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+  if (m_fd == -1)
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+    return;
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+
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+  // close device
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+  close(m_fd);
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+}
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+
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+/**
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+ * @brief set serial port configuration
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+ * @param[in] serCfg serial port configuration
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+ * @return if configuration succeeded
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+ *
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+ * This function should only be used if device is a serial port.
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+ */
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+bool Device::setSerCfg(const SerCfg& serCfg)
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+{
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+  struct termios tio;
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+
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+  // exit if not initialized
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+  if (m_fd == -1)
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+    return false;
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+
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+  // set up serial port configuration structure
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+  bzero(&tio, sizeof(tio));
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+  tio.c_cflag = CLOCAL | HUPCL | CREAD;
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+  tio.c_iflag = IGNBRK | IGNPAR;
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+  tio.c_oflag = 0;
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+  tio.c_lflag = 0;
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+  tio.c_cc[VTIME] = 1; // 0.1 sec timeout
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+  tio.c_cc[VMIN] = 0;  // return on single char read
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+  switch (serCfg.m_baud) {
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+    case    300: tio.c_cflag |=    B300; break;
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+    case    600: tio.c_cflag |=    B600; break;
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+    case   1200: tio.c_cflag |=   B1200; break;
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+    case   2400: tio.c_cflag |=   B2400; break;
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+    case   4800: tio.c_cflag |=   B4800; break;
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+    case   9600: tio.c_cflag |=   B9600; break;
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+    case  19200: tio.c_cflag |=  B19200; break;
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+    case  38400: tio.c_cflag |=  B38400; break;
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+    case  57600: tio.c_cflag |=  B57600; break;
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+    case 115200: tio.c_cflag |= B115200; break;
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+    default: return false; // invalid setting
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+  }
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+  switch (serCfg.m_data) {
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+    case 5: tio.c_cflag |= CS5; break;
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+    case 6: tio.c_cflag |= CS6; break;
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+    case 7: tio.c_cflag |= CS7; break;
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+    case 8: tio.c_cflag |= CS8; break;
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+    default: return false; // invalid setting
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+  }
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+  switch (serCfg.m_parity) {
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+    case SerCfg::ParityNone: break;
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+    case SerCfg::ParityEven: tio.c_cflag |= PARENB; break;
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+    case SerCfg::ParityOdd: tio.c_cflag |= PARENB | PARODD; break;
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+    default: return false; // invalid setting
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+  }
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+  switch (serCfg.m_stop) {
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+    case 1: break;
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+    case 2: tio.c_cflag |= CSTOPB; break;
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+    default: return false; // invalid setting
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+  }
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+
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+  // configure serial port
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+  return tcsetattr(m_fd, TCSANOW, &tio) != -1;
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+}
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+
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+/**
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+ * @brief write data to device
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+ * @param[in] data data to write
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+ * @return if the data could be written
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+ */
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+bool Device::write(const std::string &data)
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+{
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+  // exit if not initialized
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+  if (m_fd == -1)
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+    return false;
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+
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+  // write data
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+  return ::write(m_fd, data.c_str(), data.size()) == (ssize_t)data.size();
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+}
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+
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+} // namespace Blinker
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+
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+
src/linux/Device.h
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+/* Blinker
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+   Copyright 2011 Stefan Schuermans <stefan@blinkenarea.org>
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+   Copyleft GNU public license - http://www.gnu.org/copyleft/gpl.html
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+   a blinkenarea.org project */
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+
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+#ifndef DEVICE_H
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+#define DEVICE_H
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+
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+#include <string>
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+
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+#include "Io.h"
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+#include "SerCfg.h"
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+
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+namespace Blinker {
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+
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+/// a character device
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+class Device: public Io
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+{
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+public:
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+  /**
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+   * @brief constructor
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+   * @param[in] path path to device
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+   */
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+  Device(const std::string &path);
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+
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+  /// destructor
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+  ~Device();
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+
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+private:
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+  /// copy constructor disabled
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+  Device(const Device &that);
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+
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+  /// assignment operator disabled
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+  const Device & operator=(const Device &that);
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+
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+public:
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+  /**
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+   * @brief set serial port configuration
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+   * @param[in] serCfg serial port configuration
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+   * @return if configuration succeeded
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+   *
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+   * This function should only be used if device is a serial port.
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+   */
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+  bool setSerCfg(const SerCfg& serCfg);
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+
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+  /**
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+   * @brief write data to device
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+   * @param[in] data data to write
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+   * @return if the data could be written
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+   */
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+  bool write(const std::string &data);
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+
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+}; // class Device
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+
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+} // namespace Blinker
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+
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+#endif // #ifndef DEVICE_H
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+
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+
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