SW500007 Microchip Technology, SW500007 Datasheet - Page 87

• Manufacturer Part Number: SW500007
• Description: PICC-18 PRO
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC18r

Specifications of SW500007

• Supported Families: PIC18
• Core Architecture: PIC
• Software Edition: Professional
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC18
• Tool Function: Compiler
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: PIC18 Series
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 015P; 778-1002; 778-1002

C Language Features
haves like a C statement, however each instruction must be encapsulated within an asm() statement.
The following example shows both methods used to rotate a byte left through carry:
When using in-line assembler code, great care must be taken to avoid interacting with compiler-
generated code. If in doubt, compile your program with the PICC18 -S option and examine the
assembler code generated by the compiler.
3.12 Preprocessing
All C source files are preprocessed before compilation. Assembler files can also be preprocessed if
the -P command-line option is issued.
3.12.1 Preprocessor Directives
HI-TECH PICC-18 STD accepts several specialised preprocessor directives in addition to the stan-
dard directives. All of these are listed in the table below.
the ## sequence to concatenate tokens.
The asm() statement is used to embed a single assembler instruction. This form looks and be-
Macro expansion using arguments can use the # character to convert an argument to a string, and
You should not use a #asm block within any C constructs such as if, while, do etc.
In these cases, use only the asm("") form, which is a C statement and will correctly
interact with all C flow-of-control structures.
unsigned char var;
void main(void){
#asm
#endasm
}
var = 1;
movlb (_var) > > 8
rlcf (_var)&0ffh,f
asm(“movlb (_var)> >8”);
asm(“rlcf (_var)&0ffh,f”);
// like this...
Preprocessing
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