SW500009 Microchip Technology, SW500009 Datasheet - Page 64

• 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

Supported Data Types and Variables
3.4.10 Eeprom Type Qualifier
The eeprom qualifier is used to to place static variables into EEPROM. Since accessing EEPROM
memory is a lot less efficient than accessing RAM, only very basic C expressions are supported.
This qualifier is provided as a convenient way to store and access the EEPROM available on some
processors. Examples of use:
A double in eeprom:
A RAM pointer to an eeprom int:
EEPROM access is described in further detail in section 3.2.5.2.
3.4.11 Pointer Types
The format and use of pointers depend upon the range of processor selected. This is described in the
following sections.
3.4.11.1 Baseline Pointers
All pointers in the Baseline (12-bit PICs) range are 8-bits.
3.4.11.2 Midrange Pointers
All pointers for Midrange processors (14-bit PICs) are the same as for Baseline processors with the
following exceptions:
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An int stored in eeprom:
eeprom int number = 0x1234;
eeprom double pi = 3.14;
eeprom int * nptr;
RAM pointers point to RAM using the FSR index register.
Const pointers point to ROM via a RETLW table.
Function Pointers reference functions. A function is jumped to rather than called. A jump
table is used to return control to the calling function.
C Language Features