Bean documentation - Typical Usage

	ExtBitIO
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Bean ExtBitIO

External 1-bit Input/Output with Direction Register

Typical usage of the bean in user's code.

Typical Usage:

Assume the bean name "EBit1".
Some examples of typical usage of this bean are the following:

(1)
The direction of the bean is set to input.

 MAIN.C

void main(void)
{
  /* Wait until logical "1" is on the pin */
  while( !EBit1_GetVal() );
    :
}

(2)
The direction of the bean is set to output.

 MAIN.C

void main(void)
{
  for (;;) {
    EBit1_NegVal();  // Invert output level on the pin
  }
}

(3)
This example emulates open drain output pin. The direction of the bean is set to input/output and the safe mode is disabled. External pull-up resistor should be connected to the pin.

 MAIN.C

void main(void)
{
  /* Set input mode. */
  EBit1_SetDir(FALSE);
  /* Logical "1" is on the pin */
    :
  /* Set output mode */  
  EBit1_SetDir(TRUE);
  
  /* Set output value to "0" */
  EBit1_ClrVal();
  /* Logical "0" is on the pin */
}

(4)
This example emulates open drain output pin. The direction of the bean is set to input/output and the safe mode is enabled. External pull-up resistor should be connected to the pin.

 MAIN.C

void main(void)
{
  /* Set input mode */	
  EBit1_SetDir(FALSE);
  /* Logical "1" is on the pin */

  /* Set output value to "0", which will be
     applied when the bean will be set to output mode */
  EBit1_ClrVal();
    :
  /* Set output mode */
  EBit1_SetDir(TRUE);
  /* Logical "0" is on the pin */
}

For more about typical usage of the bean code please refer to the page Bean Code Typical Usage.