CCS C Compiler Manual PCB / PCM / PCH

PreProcessor
NORETFIE
to interrupt lower priority interrupts.
ISR functions (preceeded by a #int_xxx) will use a
RETURN opcode instead of the RETFIE opcode.
This is not a commonly used option; used rarely in
cases where the user is writing their own ISR
handler.
Both chip and options are optional, so multiple #DEVICE lines may be used to fully
define the device. Be warned that a #DEVICE with a chip identifier, will clear all previous
#DEVICE and #FUSE settings.
Compilation mode selection-
The #DEVICE directive supports compilation mode selection. The valid keywords are
CCS2, CCS3, CCS4 and ANSI. The default mode is CCS4. For the CCS4 and ANSI
mode, the compiler uses the default fuse settings NOLVP, PUT for chips with these
fuses. The NOWDT fuse is default if no call is made to restart_wdt().
CCS4
ANSI
CCS2
CCS3
CCS2
only
This is the default compilation mode. The pointer size in this mode for
PCM and PCH is set to *=16 if the part has RAM over 0FF.
Default data type is SIGNED all other modes default is UNSIGNED.
Compilation is case sensitive, all other modes are case insensitive.
Pointer size is set to *=16 if the part has RAM over 0FF.
var16 = NegConst8 is compiled as: var16 = NegConst8 & 0xff (no sign
extension) Pointer size is set to *=8 for PCM and PCH and *=5 for PCB .
The overload keyword is required.
The default #DEVICE ADC is set to the resolution of the part, all other
modes default to 8.
onebit = eightbits is compiled as onebit = (eightbits != 0)
All other modes compile as: onebit = (eightbits & 1)
Purpose:
Chip Options -Defines the target processor. Every program must have exactly one
#DEVICE with a chip. When linking multiple compilation units, this directive must appear
exactly the same in each compilation unit.
Compilation mode selection - The compilation mode selection allows existing code to
be compiled without encountering errors created by compiler compliance. As CCS
discovers discrepancies in the way expressions are evaluated according to ANSI, the
change will generally be made only to the ANSI mode and the next major CCS release.
Examples:
Chip Options-
#device PIC16C74
#device PIC16C67 *=16
#device *=16 ICD=TRUE
#device PIC16F877 *=16 ADC=10
#device %f=.
printf("%f",.5); //will print .5, without the directive it will print 0.5
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