Methods:

• RecvChar - If any data received, this method returns one character, otherwise it returns an error code (it does not wait for data).
  
  ANSIC prototype: byte RecvChar(byte *Chr)
  
  • Chr: Pointer to byte - A pointer to the received character.
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
    ERR_RXEMPTY - No data in receiver
    ERR_OVERRUN - Overrun error is detected
  
  
• SendChar - Sends one character to the channel.
  
  ANSIC prototype: byte SendChar(byte Chr)
  
  • Chr:byte - Character to send.
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
  
  
• CharsInRxBuf - Returns number of characters in the input buffer.
  
  ANSIC prototype: byte CharsInRxBuf(word *Chr)
  
  • Chr: Pointer to word - A pointer to the number of characters in the input buffer.
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
  
  
• CharsInTxBuf - Returns number of characters in the output buffer.
  
  ANSIC prototype: byte CharsInTxBuf(word *Chr)
  
  • Chr: Pointer to word - A pointer to the number of characters in the output buffer.
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
  
  
• SetShiftClockPolarity - Sets the shift clock polarity at runtime. Output data will be shifted on the selected edge polarity.
  
  ANSIC prototype: byte SetShiftClockPolarity(byte Edge)
  
  • Edge:byte - Edge polarity, possible values:
    0-falling edge,
    1-rising edge.
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
  
  
• SetIdleClockPolarity - Set the idle clock polarity at runtime. If communication does not run, the clock signal will be set to the required level.
  
  ANSIC prototype: byte SetIdleClockPolarity(byte Level)
  
  • Level:byte - Idle clock polarity:
    0-low
    1-high
  • Return value:byte - Error code, possible codes:
    ERR_OK - OK
  
  

Note: Some methods can be implemented as macros.