add high speed serial mode

src/ebusd/main.cpp

@@ -197,7 +197,8 @@ static const char argpdoc[] =
 static const struct argp_option argpoptions[] = {
   {nullptr,          0,        nullptr,    0, "Device options:", 1 },
   {"device",         'd',      "DEV",      0, "Use DEV as eBUS device ("
-      "\"enh:DEVICE\" or \"enh:IP:PORT\" for enhanced device,"
+      "\"enh:DEVICE\" or \"enh:IP:PORT\" for enhanced device, "
+      "\"ens:DEVICE\" for enhanced high speed serial device, "
       "\"DEVICE\" for serial device, or \"[udp:]IP:PORT\" for network device) [/dev/ttyUSB0]", 0 },
   {"nodevicecheck",  'n',      nullptr,    0, "Skip serial eBUS device test", 0 },
   {"readonly",       'r',      nullptr,    0, "Only read from device, never write to it", 0 },

src/lib/ebus/device.cpp

@@ -97,7 +97,8 @@ Device::~Device() {
 }
 
 Device* Device::create(const char* name, unsigned int extraLatency, bool checkDevice, bool readOnly, bool initialSend) {
-  bool enhanced = strncmp(name, "enh:", 4) == 0;
+  bool highSpeed = strncmp(name, "ens:", 4) == 0;
+  bool enhanced = highSpeed || strncmp(name, "enh:", 4) == 0;
   if (enhanced) {
     name += 4;
   }
@@ -762,7 +763,7 @@ result_t SerialDevice::open() {
   // create new settings
   memset(&newSettings, 0, sizeof(newSettings));
 
-  cfsetspeed(&newSettings, m_enhancedProto ? B9600 : B2400);
+  cfsetspeed(&newSettings, m_enhancedProto ? (m_enhancedHighSpeed ? B115200 : B9600) : B2400);
   newSettings.c_cflag |= (CS8 | CLOCAL | CREAD);
   newSettings.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);  // non-canonical mode
   newSettings.c_iflag |= IGNPAR;  // ignore parity errors

src/lib/ebus/device.h

@@ -346,10 +346,12 @@ class SerialDevice : public Device {
    * @param readOnly whether to allow read access to the device only.
    * @param initialSend whether to send an initial @a ESC symbol in @a open().
    * @param enhancedProto whether to use the ebusd enhanced protocol.
+   * @param enhancedHighSpeed whether to use ebusd enhanced protocol in high speed mode.
    */
   SerialDevice(const char* name, bool checkDevice, unsigned int extraLatency, bool readOnly, bool initialSend,
-      bool enhancedProto = false)
-    : Device(name, checkDevice, extraLatency, readOnly, initialSend, enhancedProto) {}
+               bool enhancedProto = false, bool enhancedHighSpeed = false)
+    : Device(name, checkDevice, extraLatency, readOnly, initialSend, enhancedProto), m_enhancedHighSpeed(enhancedHighSpeed) {
+  }
 
   // @copydoc
   result_t open() override;
@@ -364,6 +366,9 @@ class SerialDevice : public Device {
 
 
  private:
+  /** whether to use ebusd enhanced protocol in high speed mode. */
+  bool m_enhancedHighSpeed;
+
   /** the previous settings of the device for restoring. */
   termios m_oldSettings;
 };