I want to accomplish the following at/before compile and/or link time:
1) Fill unused flash with a known preset value.
2) Add a CRC value at the end of an area of flash.
3) Change S Record format from S3/S7 to S2/S8.
I am using CodeWarrior 5.9.0 with a Coldfire v1 MCF51QE128LQFP80 target. I am using the default “Embedded Coldfire Linker”. I have seen numerous examples of how to accomplish all of these for the “Smart Linker” using a prm file. But the “Embedded Coldfire Linker” does not seem to support the same syntax, and the linker documentation does not list options for a CRC, S-Record format change, nor clearly lists a way to fill unused Flash. I would like to know if it is possible to use the “Smart Linker” with the Coldfire V1 processor for linking, as it supports the functions I need. If not, what is the correct syntax for an “Embedded Coldfire Linker” LCF file. My current LCF file is listed below.
Code:
WRITES0COMMENT "0123456789"MEMORY { code (RX) : ORIGIN = 0x00000410, LENGTH = 0x0001FBF0 userram (RWX) : ORIGIN = 0x00800000, LENGTH = 0x00002000}SECTIONS {# Heap and Stack sizes definition ___heap_size = 0x0400; ___stack_size = 0x0400;# MCF51QE128 Derivative Memory map definitions from linker command files:# ___RAM_ADDRESS, ___RAM_SIZE, ___FLASH_ADDRESS, ___FLASH_SIZE linker# symbols must be defined in the linker command file.# 8 Kbytes Internal SRAM ___RAM_ADDRESS = 0x00800000; ___RAM_SIZE = 0x00002000;# 128 KByte Internal Flash Memory ___FLASH_ADDRESS = 0x00000000; ___FLASH_SIZE = 0x00020000; .userram : {} > userram .code : {} > code .text : { *(.text) . = ALIGN (0x4); *(.rodata) . = ALIGN (0x4); ___ROM_AT = .; ___DATA_ROM = .; } >> code .data : AT(___ROM_AT) { ___DATA_RAM = .; . = ALIGN(0x4); *(.exception) . = ALIGN(0x4); __exception_table_start__ = .; EXCEPTION __exception_table_end__ = .; ___sinit__ = .; STATICINIT __START_DATA = .; *(.data) . = ALIGN (0x4); __END_DATA = .; __START_SDATA = .; *(.sdata) . = ALIGN (0x4); __END_SDATA = .; ___DATA_END = .; __SDA_BASE = .; . = ALIGN (0x4); } >> userram .bss : { ___BSS_START = .; __START_SBSS = .; *(.sbss) . = ALIGN (0x4); *(SCOMMON) __END_SBSS = .; __START_BSS = .; *(.bss) . = ALIGN (0x4); *(COMMON) __END_BSS = .; ___BSS_END = .; . = ALIGN(0x4); } >> userram .custom : { ___HEAP_START = .; ___heap_addr = ___HEAP_START; ___HEAP_END = ___HEAP_START + ___heap_size; ___SP_END = ___HEAP_END; ___SP_INIT = ___SP_END + ___stack_size; . = ALIGN (0x4); } >> userram __SP_INIT = ___SP_INIT; ___SP_AFTER_RESET = __SP_INIT; _romp_at = ___ROM_AT + SIZEOF(.data); .romp : AT(_romp_at) { __S_romp = _romp_at; WRITEW(___ROM_AT); WRITEW(ADDR(.data)); WRITEW(SIZEOF(.data)); WRITEW(0); WRITEW(0); WRITEW(0); }}
