rs232.h

00001 #include "mbed.h"
00002 
00003 
00004 
00005 //---------------------------------------
00006 // Definitions
00007 //---------------------------------------
00008 #define RS232_BUFFER_LENGTH      256
00009 #define RS232_RX_TIMEOUT_US      50000
00010 #define RS232_BAUDRATE           9600
00011 #define RS232_BITS               8
00012 #define RS232_STOPBIT            1
00013 
00014 
00015 //---------------------------------------
00016 // Enums
00017 //---------------------------------------
00018 typedef enum
00019 {
00020     RS232_MODE_LISTEN,
00021     RS232_MODE_RX_READY,
00022     //-----------------
00023     CNT_eRS232_mode
00024 }eRS232_mode;
00025 
00026 
00027 
00028 //---------------------------------------
00029 // Structures
00030 //---------------------------------------
00031 typedef struct
00032 {
00033     eRS232_mode mode;           // mode of RS232 hardware
00034     char *ptrReadPositon;       // actual read position in buffer
00035     int   bytesToRead;          // Number of received bytes
00036 }sRS232_handler;
00037 
00038 
00039 
00040 //---------------------------------------
00041 // Global Variables
00042 //---------------------------------------
00043 
00044 
00045 
00046 //---------------------------------------
00047 // Global Functions
00048 //---------------------------------------
00049 void RS232_init( void );                                 // Init hardware and internal buffer
00050 
00051 
00052 int RS232_receiveData( char *& ptrData, int *ptrNumBytes );     // "char *&" = reference to pointer !!
00053                                                                 // return pointer to buffer and number of received bytes
00054                                                                 // Return 1: New data available, get pointer to buffer and number of bytes to read
00055                                                                 // Return 0: No new data available
00056 int RS232_sendData( char *ptrData, int NumBytes );      // send data NumBytes bytes from source pointer: ptrData
00057                                                             // Return 1: Sending was successfull
00058                                                             // Return 0: Could not send data, eithter to many bytes, zero bytes or UART is still listining
00059 
00060 void RS232_setRTS( int level);
00061 int RS232_getCTS( void );