SW500009 Microchip Technology, SW500009 Datasheet - Page 69

• Manufacturer Part Number: SW500009
• Description: HI-TECH FOR DSPIC/PIC24
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC24 & DsPICr

Specifications of SW500009

• Supported Families: PIC24
• Core Architecture: PIC, DsPIC
• Software Edition: Standard
• Kit Contents: Software And Docs
• Tool Type: Compiler
• Mcu Supported Families: PIC24 MCUs And DsPIC DSCs
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: DSPIC3X/PIC24
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 025; 778-1003; 778-1003

C Language Features
In this example, the parameter b is held in the memory locations ?_test and ?_test+1.
function or the code used to call a function, it is often helpful to write a dummy C function with the
same argument types as your assembler function, and compile to assembler code with the PICC -S
option, allowing you to examine the assembler code.
3.6.2 Function Return Values
Function return values are passed to the calling function as follows:
will exit with the following code:
word in the lowest memory location. For example, the function:
will exit with the following code:
If you need to determine, for assembler code for example, the exact entry or exit code within a
8-Bit Return Values
Eight-bit values are returned from a function in the W register. For example, the function:
16-bit and 32-bit values are returned in temporary memory locations, with the least significant
movlw 08h
movwf ?_test
clrf ?_test+1
movf _a,w
call (_test)
char return_8(void)
{
}
retlw 0
int return_16(void)
{
}
movlw 34h
movwf btemp
movlw 12h
movwf btemp+1
return
return 0;
return 0x1234;
Functions
55