C Language Development Kit/Functions/Idle

Description	This function sets the reader in a 'sleep' mode. Calling this function while waiting for an action, will reduce the power consumption significantly.
Syntax	void idle(void);
Arguments	None
Returns	None
Remarks	After calling the idle() function, the reader will halt program execution until it is awakened by a software interrupt like the reception of data over the serial port, or by a hardware interrupt like a keystroke. When no interrupts are received, the terminal will resume program execution within a maximum of 10 (PHL1300/1700/2700) or 20 milliseconds (OPH100x, DWT7133, OPL97xx, DCL153x) after calling idle(). Using idle() has almost no effect on the scanning performance. One can use this function while waiting for a keystroke, while waiting for reception of data etc.
Example	// The following example demonstrates the use of idle() and the power reduction. // The example may reduce power consumption by about 2-4 times! #include "lib.h" #include <stdio.h> void main( void ) { unsigned int x; while( 1 ) { printf("\fidle loop"); for( x=0; x < 200; x++) idle(); printf("\f normal loop"); for( x=0; x < 10000; x++) continue; } }