add new function to send application reset incl. subcode

fix typo in comment
add new program to test experimental feature application reset
add mbus-tcp-application-reset to build process

bin/Makefile.am

@@ -17,7 +17,7 @@ bin_PROGRAMS			= mbus-tcp-scan mbus-tcp-request-data mbus-tcp-request-data-multi
                           mbus-tcp-select-secondary mbus-tcp-scan-secondary \
                           mbus-serial-scan mbus-serial-request-data mbus-serial-request-data-multi-reply \
                           mbus-serial-select-secondary mbus-serial-scan-secondary \
-                          mbus-serial-switch-baudrate mbus-tcp-raw-send
+                          mbus-serial-switch-baudrate mbus-tcp-raw-send mbus-tcp-application-reset
 
 # tcp
 mbus_tcp_scan_LDFLAGS	= -L$(top_builddir)/mbus
@@ -44,6 +44,9 @@ mbus_tcp_raw_send_LDFLAGS = -L$(top_builddir)/mbus
 mbus_tcp_raw_send_LDADD	  = -lmbus -lm
 mbus_tcp_raw_send_SOURCES = mbus-tcp-raw-send.c
 
+mbus_tcp_application_reset_LDFLAGS = -L$(top_builddir)/mbus
+mbus_tcp_application_reset_LDADD   = -lmbus -lm
+mbus_tcp_application_reset_SOURCES = mbus-tcp-application-reset.c
 
 # serial
 mbus_serial_scan_LDFLAGS	= -L$(top_builddir)/mbus

mbus/mbus-protocol-aux.c

@@ -1711,6 +1711,61 @@ mbus_send_switch_baudrate_frame(mbus_handle * handle, int address, int baudrate)
     return retval;
 }
 
+//------------------------------------------------------------------------------
+// send a user data packet from master to slave: the packet resets
+// the application layer in the slave
+//------------------------------------------------------------------------------
+int
+mbus_send_application_reset_frame(mbus_handle * handle, int address, int subcode)
+{
+    int retval = 0;
+    mbus_frame *frame;
+    
+    if (mbus_is_primary_address(address) == 0)
+    {
+        MBUS_ERROR("%s: invalid address %d\n", __PRETTY_FUNCTION__, address);
+        return -1;
+    }
+    
+    if (subcode > 0xFF)
+    {
+    	MBUS_ERROR("%s: invalid subcode %d\n", __PRETTY_FUNCTION__, subcode);
+        return -1;
+    }
+    
+    frame = mbus_frame_new(MBUS_FRAME_TYPE_LONG);
+    
+    if (frame == NULL)
+    {
+        MBUS_ERROR("%s: failed to allocate mbus frame.\n", __PRETTY_FUNCTION__);
+        return -1;
+    }
+    
+    frame->control = MBUS_CONTROL_MASK_SND_UD | MBUS_CONTROL_MASK_DIR_M2S;
+    frame->address = address;
+    frame->control_information = MBUS_CONTROL_INFO_APPLICATION_RESET;
+    
+    if (subcode >= 0)
+    {
+        frame->data_size = 1;
+        frame->data[0] = (subcode & 0xFF);
+    }
+    else
+    {
+        frame->data_size = 0;
+    }
+
+    if (mbus_send_frame(handle, frame) == -1)
+    {
+        MBUS_ERROR("%s: failed to send mbus frame.\n", __PRETTY_FUNCTION__);
+        retval = -1;
+    }
+
+    mbus_frame_free(frame);
+    return retval;
+}
+
+
 //------------------------------------------------------------------------------
 // send a request packet to from master to slave
 //------------------------------------------------------------------------------

mbus/mbus-protocol-aux.h

@@ -246,7 +246,7 @@ int mbus_purge_frames(mbus_handle * handle);
 int mbus_send_frame(mbus_handle * handle, mbus_frame *frame);
 
 /** 
- * Sends secodary address selection frame using "unified" handle
+ * Sends secondary address selection frame using "unified" handle
  * 
  * @param handle             Initialized handle
  * @param secondary_addr_str Secondary address
@@ -255,6 +255,17 @@ int mbus_send_frame(mbus_handle * handle, mbus_frame *frame);
  */
 int mbus_send_select_frame(mbus_handle * handle, const char *secondary_addr_str);
 
+/** 
+ * Sends application reset to given slave using "unified" handle
+ * 
+ * @param handle    Initialized handle
+ * @param address   Address (0-255)
+ * @param subcode   Subcode (0-255) or no subcode (-1)
+ * 
+ * @return Zero when successful.
+ */
+int mbus_send_application_reset_frame(mbus_handle * handle, int address, int subcode);
+
 /** 
  * Sends switch baudrate frame using "unified" handle
  *