uart.h

00001 #include "mbed.h"
00002 
00003 
00004 //---------------------------------------
00005 // Definitions
00006 //---------------------------------------
00007 #define UART_BUFFER_LENGTH      512
00008 #define UART_RX_TIMEOUT_US      1000
00009 #define UART_BAUDRATE           115200
00010 #define UART_BITS               8
00011 #define UART_STOPBIT            1
00012 
00013 //---------------------------------------
00014 // Enums
00015 //---------------------------------------
00016 typedef enum {
00017     UART_MODE_LISTEN,
00018     UART_MODE_RX_READY,
00019     //-----------------
00020     CNT_eUART_mode
00021 } eUART_mode;
00022 
00023 
00024 //---------------------------------------
00025 // Structures
00026 //---------------------------------------
00027 typedef struct {
00028     eUART_mode mode;            // mode of UART hardware
00029     char *ptrBuffer;            // start address of buffer
00030     char *ptrReadPositon;       // actual read position in buffer
00031     char *ptrWritePosition;     // actual write position in buffer
00032     char bytesToRead;           // Number of received bytes
00033     char bytesToWrite;          // Number of bytes to send
00034 } sUART_handler;
00035 
00036 
00037 
00038 //---------------------------------------
00039 // Global Variables
00040 //---------------------------------------
00041 extern sUART_handler UART_handler;
00042 extern char uartBuffer[UART_BUFFER_LENGTH];
00043 
00044 
00045 //---------------------------------------
00046 // Global Functions
00047 //---------------------------------------
00048 void UART_init( void );
00049 void UART_reset( void );            // clear all UART registers, --> restart
00050 int UART_newFrame( void );          // check for new received frame
00051 int UART_checkReceivedCRC( void );  // check received CRC16
00052 int UART_sendData( void );          // send data saved in buffer