1) Created MSTP_Create_And_Send_Frame function.

2) Moved MSTP_Create_Frame call out of rs485.c and into mstp.c
3) Modified all previous calls to RS485_Send_Frame calls to call
MSTP_Create_And_Send_Frame instead.

bacnet-stack/mstp.h

@@ -231,13 +231,4 @@ void MSTP_Millisecond_Timer(struct mstp_port_struct_t *mstp_port);
 void MSTP_Receive_Frame_FSM(struct mstp_port_struct_t *mstp_port);
 void MSTP_Master_Node_FSM(struct mstp_port_struct_t *mstp_port);
 
-unsigned MSTP_Create_Frame(
-  uint8_t *buffer, // where frame is loaded
-  unsigned buffer_len, // amount of space available
-  uint8_t frame_type, // type of frame to send - see defines
-  uint8_t destination, // destination address
-  uint8_t source,  // source address
-  uint8_t *data, // any data to be sent - may be null
-  unsigned data_len); // number of bytes of data (up to 501)
-
 #endif