rs232.c File Reference

#include "error_management.h"

Go to the source code of this file.

Functions
int	rs232_close ()
int	rs232_open (char *_port, int baud_rate, int byte_size, int parity, int stop_bits)
int	rs232_read (void *buffer, int size, int *_read_bytes)
int	rs232_write (void *buffer, int size, int *_written_bytes)
Variables
static COMMTIMEOUTS	g_cto
static DCB	g_dcb
static HANDLE	handle_com = NULL

---

Function Documentation

int rs232_close

(

)

Definition at line 121 of file ADPCM_STREAMING/rs232.c.

Referenced by get_data(), and main().

{
  CloseHandle(handle_com);
  return 1;
}

int rs232_open	(	char *	_port,
		int	baud_rate,
		int	byte_size,
		int	parity,
		int	stop_bits
	)

Definition at line 79 of file ADPCM_STREAMING/rs232.c.

Referenced by get_data(), and main().

{
    // Make sure another port is not already opened
    ASSERT(!handle_com);

    // Open the existing COMX file to open the port
  handle_com = CreateFile(
                      _port,
                      GENERIC_READ | GENERIC_WRITE,
                      0,
                      NULL,
                      OPEN_EXISTING,
                      FILE_ATTRIBUTE_SYSTEM,
                      NULL);
 
    // Make sure it is opened
    if (handle_com == INVALID_HANDLE_VALUE)
       return 0;

    // buffer size for emission and reception
  SetupComm(handle_com, RS232_RX_SIZE, RS232_TX_SIZE);

    // COM port configuration
  g_dcb.BaudRate = baud_rate;
  g_dcb.ByteSize = byte_size;
  g_dcb.Parity = parity;
  g_dcb.StopBits = stop_bits;
  if(!SetCommTimeouts(handle_com, &g_cto) || !SetCommState(handle_com, &g_dcb))
    {
      CloseHandle(handle_com);
      return 0;
    }

    // Flush buffers for emission and reception
    // DTR = 1
  PurgeComm(handle_com, PURGE_TXCLEAR | PURGE_RXCLEAR | PURGE_TXABORT | PURGE_RXABORT);
  EscapeCommFunction(handle_com, SETDTR);

  return 1;
}

int rs232_read	(	void *	buffer,
		int	size,
		int *	_read_bytes
	)

Definition at line 128 of file ADPCM_STREAMING/rs232.c.

Referenced by get_data(), and main().

{
  return ReadFile(handle_com, buffer, size, (DWORD *) _read_bytes, (LPOVERLAPPED) NULL);
}

int rs232_write	(	void *	buffer,
		int	size,
		int *	_written_bytes
	)

Definition at line 134 of file ADPCM_STREAMING/rs232.c.

Referenced by main().

{
  return WriteFile(handle_com, buffer, size, (DWORD *) _written_bytes, (LPOVERLAPPED) NULL);
}

---

Variable Documentation

COMMTIMEOUTS g_cto [static]

Initial value:

{
  RS232_MAX_WAIT_READ,
  0,
  RS232_MAX_WAIT_READ,
  0,
  0
}

Definition at line 37 of file ADPCM_STREAMING/rs232.c.

Referenced by rs232_open().

DCB g_dcb [static]

Initial value:

{
  sizeof(DCB),          
  9600,                 
  TRUE,                 
  FALSE,                
  FALSE,                
  FALSE,                
  DTR_CONTROL_ENABLE,   
  FALSE,                
  FALSE,                
  FALSE,                
  FALSE,                
  FALSE,                
  FALSE,                
  RTS_CONTROL_ENABLE,   
  FALSE,                
  0,                    
  0,                    
  0x100,                
  0x100,                
  8,                    
  NOPARITY,             
  ONESTOPBIT,           
  0x11,                 
  0x13,                 
    '?',                  
  0x1A,                 
  0x10                
}

Definition at line 47 of file ADPCM_STREAMING/rs232.c.

Referenced by rs232_open().

HANDLE handle_com = NULL [static]

Definition at line 34 of file ADPCM_STREAMING/rs232.c.

Referenced by rs232_close(), rs232_open(), rs232_read(), and rs232_write().