CCS C Compiler Manual PCB / PCM / PCH

Data Definitions
For example:
Places 1,2,3,4 to ROM addresses starting at 0x1000
#rom 0x1000 = {1, 2, 3, 4}
Places null terminated string in ROM
#rom 0x1000={"hello"}
This method can only be used to initialize the program memory.
Built-in-Functions:
The compiler also provides built-in functions to place data in program memory, they are:
write_program_eeprom(address,data);
- Writes data to program memory
write_program_memory(address, dataptr, count);
- Writes count bytes of data from dataptr to address in program memory.
-
Please refer to the help of these functions to get more details on their usage and limitations
regarding erase procedures. These functions can be used only on chips that allow writes to
program memory. The compiler uses the flash memory erase and write routines to implement
the functionality.
The data placed in program memory using the methods listed above can be read from width the
following functions:
read_program_memory((address, dataptr, count)
- Reads count bytes from program memory at address to RAM at dataptr.
These functions can be used only on chips that allow reads from program memory. The
compiler uses the flash memory read routines to implement the functionality.
Named Registers
The CCS C Compiler supports the new syntax for filing a variable at the location of a
processor register. This syntax is being proposed as a C extension for embedded
use. The same functionality is provided with the non-standard #byte, #word, #bit
and #locate.
The syntax is:
register _name type id;
Or
register constant type id;
name is a valid SFR name with an underscore before it.
Examples:
register _status int8 status_reg;
register _T1IF int8 timer_interrupt;
register 0x04 int16 file_select_register;
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