CCS C Compiler Manual PCB / PCM / PCH

Built-in Functions
If "errno.h" is included then the domain and range errors are stored in the errno
variable. The user can check the errno to see if an error has occurred and print
the error using the perror function.
Range error occur in the following case:
exp: when the argument is too large
Availability:
Requires:
Examples:
Example Files:
Also See:
All devices
#INCLUDE
// Calculate x to the power of y
x_power_y = exp( y * log(x) );
None
pow(), log(), log10()
ext_int_edge( )
Syntax:
Parameters:
Returns:
Function:
Availability:
Requires:
Examples:
Example Files:
Also See:
ext_int_edge (source, edge)
source is a constant 0,1 or 2 for the PIC18XXX and 0 otherwise.
Source is optional and defaults to 0.
edge is a constant H_TO_L or L_TO_H representing "high to low" and "low to
high"
undefined
Determines when the external interrupt is acted upon. The edge may be
L_TO_H or H_TO_L to specify the rising or falling edge.
Only devices with interrupts (PCM and PCH)
Constants are in the devices .h file
ext_int_edge( 2, L_TO_H); // Set up PIC18 EXT2
ext_int_edge( H_TO_L ); // Sets up EXT
ex_wakup.c
#INT_EXT , enable_interrupts() , disable_interrupts() , Interrupts Overview
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