SW500010 Microchip Technology, SW500010 Datasheet - Page 31

• Manufacturer Part Number: SW500010
• Description: HI-TECH C PRO FOR PIC10/12/16
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC10/12/16r

Specifications of SW500010

• Supported Families: PIC10, PIC12, PIC16
• Core Architecture: PIC
• Software Edition: Professional
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC10/12/16
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: PIC10, PIC12, PIC14, PIC16, PIC16E
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 019P; 778-1006; 778-1006

PICC Command-line Driver
If the startup module is kept, it will be called startup.as and will be located in the current
working directory. If you are using an IDE to perform the compilation the destination directory is
dictated by the IDE itself, however you may use the --OUTDIR option to specify an explicit output
directory to the compiler.
of the runtime code can be controlled, if required, using the --RUNTIME option. Section
describes the use of this option, and the following sections describes the functional aspects of the
code contained in this module and its effect on program operation.
the powerup routine feature described later in Section 2.3.3.
2.3.2.1 Initialization of Data psects
One job of the runtime startup code is ensure that any initialized variables contain their initial value
before the program begins execution. Initialized variables are those which are not auto objects and
which are assigned an initial value in their definition, for example input in the following example.
Such initialized objects have two components: their initial value stored in a psect destined for non-
volatile memory (i.e. placed in the HEX file), and space for the variable in RAM psect where the
variable will reside and be accessed during program execution.
location of initialized variables in a psect called rdata. This psect does not contribute to the output
file and constitutes a reservation of space in the RAM once the program is running.
psect so that the RAM variables will contain their initial values before main() is executed. Each
location in the idata psect is copied to the corresponding place in the rdata psect.
For example:
With this part of the runtime startup code absent, the contents of initialized variables will be unpre-
dictable when the program begins execution. Code relying on variables containing their initial value
will fail.
This is an automatic process which does not require any user interaction, however some aspects
If you require any special initialization to be performed immediately after reset, you should use
The actual initial values are placed in a psect called idata. Space is reserved for the runtime
The runtime startup code performs a block copy of the values from the idata to the rdata
The block copy of the data psects may be omitted by disabling the init suboption of --RUNTIME.
--RUNTIME=default,-keep
int input = 88;
void main(void) { ...
--RUNTIME=default,-init
Runtime Files
2.6.50
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