/*****************************************************************
Routine: SerialCharsAvailable
Inputs:
None.
Returns:
int
Description:
This routine check to see if there are characters in the input buffer
to be read. It is a good idea to call this routine before actually
reading the buffer.
*****************************************************************/
int Comm32Port::SerialCharsAvailable()
{
/*
* to get the number of avalable chararacters .
*/
if( !m_nNumBytes )
{
m_nNumBytes = SerialGetString( m_gruchInputBuffer, READ_BUFFER_SIZE );
m_nIndexBuffer = 0;
}
return m_nNumBytes;
} /* SerialCharsAvailable */
/*****************************************************************
Routine: SerialGetChar
Inputs:
None.
Returns:
int
Description:
This routine gets a single char from the input buffer of the serial
port. It can only get what is there so it is a good idea to check
if there is data in the input buffer using SerialCharsAvailable
*****************************************************************/
int Comm32Port::SerialGetChar()
{
int nRetChar = COMM_NO_DATA;
if( !m_nNumBytes )
{
m_nNumBytes = SerialGetString( m_gruchInputBuffer, READ_BUFFER_SIZE );
m_nIndexBuffer = 0;
} /* if */
if( m_nNumBytes > 0 )
{
nRetChar = m_gruchInputBuffer[m_nIndexBuffer];
m_nIndexBuffer++;
m_nNumBytes--;
} /* if */
return nRetChar;
} /* SerialGetChar */
char * serial4getstring(void)
{
return SerialGetString(UART4);
}
