CCS C Compiler Manual PCB / PCM / PCH

Returns:
Function:
Availability:
Requires:
updated unless the FAST_IO mode is set on port A. note that doing I/O with a
variable instead of a constant will take much longer time.
0 (or FALSE) if the pin is low,
1 (or TRUE) if the pin is high
This function returns the state of the indicated pin. The method of I/O is
dependent on the last USE *_IO directive. By default with standard I/O before
the input is done the data direction is set to input.
All devices.
Pin constants are defined in the devices .h file
Examples:
while ( !input(PIN_B1) );
// waits for B1 to go high
if( input(PIN_A0) )
printf("A0 is now high\r\n");
int16 i=PIN_B1;
while(!i);
//waits for B1 to go high
Example Files:
Also See:
ex_pulse.c
input_x(), output_low(), output_high(), #USE FIXED_IO, #USE FAST_IO,
#USE STANDARD_IO, General Purpose I/O
input_change_x( )
Syntax: value = input_change_a( );
value = input_change_b( );
value = input_change_c( );
value = input_change_d( );
value = input_change_e( );
value = input_change_f( );
value = input_change_g( );
value = input_change_h( );
value = input_change_j( );
value = input_change_k( );
Parameters: None
Returns:
Function:
An 8-bit or 16-bit int representing the changes on the port.
This function reads the level of the pins on the port and compares them to the
results the last time the input_change_x( ) function was called. A 1 is returned if
the value has changed, 0 if the value is unchanged.
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