SW500009 Microchip Technology, SW500009 Datasheet - Page 110

• 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

HI-TECH C Assembly Language
4.3.8.7 DB
DB is used to initialize storage as bytes. The argument is a list of expressions, each of which will be
assembled into one byte. Each character of the string will be assembled into one memory location.
Examples:
Note that because the size of an address unit in ROM is 2 bytes, the DB pseudo-op will initialise a
word with the upper byte set to zero.
4.3.8.8 DW
DW operates in a similar fashion to DB, except that it assembles expressions into words. Example:
4.3.8.9 DS
This directive reserves, but does not initialize, memory locations. The single argument is the number
of bytes to be reserved. Examples:
4.3.8.10 FNADDR
This directive tells the linker that a function has its address taken, and thus could be called indirectly
through a function pointer. For example
tells the linker that func1() has its address taken.
4.3.8.11 FNARG
The directive
tells the linker that evaluation of the arguments to function fun1 involves a call to fun2, thus the
memory argument memory allocated for the two functions should not overlap. For example, the C
function calls
96
alabel: DB ’X’,1,2,3,4,
DW -1, 3664h, ‘A’, 3777Q
alabel: DS 23
xlabel: DS 2+3
FNADDR _func1
FNARG fun1,fun2
;Reserve 23 bytes of memory
;Reserve 5 bytes of memory
Macro Assembler