标题: 56F807dsp的cmd文件不知道怎么编，请大家帮忙 [打印本页]

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作者: wxx_rui    时间: 2007-9-18 11:57     标题: 56F807dsp的cmd文件不知道怎么编，请大家帮忙

有例程也看不懂，也看了Targeting DSP56800.PDF文件，除了MEMORY懂外，SECTIONS部分还是不懂，请版主和大家帮帮忙吧

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作者: strongchen    时间: 2007-9-18 13:58

请把你的问题写具体些。

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作者: wxx_rui    时间: 2007-9-18 17:40

下面是编程环境自动生成的，看不太懂，所以也不知道该怎么根据自己的需要做改动
# ----------------------------------------------------
# linker command file for DSP56807EVM
# using
# external pRAM
# external xRAM
# internal xRAM (for compiler regs)
# mode 3
# EXT 0
# ----------------------------------------------------
# see end of file for additional notes
# additional reference: Motorola docs

# for this LCF:
# interrupt vectors --> external pRAM starting at zero
# program code --> external pRAM
# constants --> external xRAM
# dynamic data --> external xRAM

# stack size is set to 0x1000 for external RAM LCF

# requirements: Mode 3 and EX=0
# note -- there is a mode OB but any Reset or COP Reset
# resets the memory map back to Mode 0A.

# DSP56807EVM board settings
# ON --> jumper JG7 (mode 0 upon exit from reset)
# ON --> jumper JG8 (enable external board SRAM)
# CodeWarrior debugger Target option settings
# OFF --> "Use Hardware Breakpoints"
# ON --> "Debugger sets OMR at Launch" option

# note: with above option on, CW debugger sets OMR as
# OMR:
# 0 --> EX bit (stay in Debug processing state)
# 1 --> MA bit
# 1 --> MB bit

# 56807
# mode 3 (development)
# EX = 0

MEMORY
{
.p_interrupts_ext_RAM (RWX) : ORIGIN = 0x0000, LENGTH = 0x0080
.p_external_RAM (RWX) : ORIGIN = 0x0080, LENGTH = 0x0000
.x_compiler_regs_iRAM (RW) : ORIGIN = 0x0030, LENGTH = 0x0010
.x_internal_RAM (RW) : ORIGIN = 0x0040, LENGTH = 0x0FC0
.x_peripherals (RW) : ORIGIN = 0x1000, LENGTH = 0x0800
# .x_reserved : ORIGIN = 0x1800, LENGTH = 0x0800
.x_flash_ROM (R) : ORIGIN = 0x2000, LENGTH = 0x2000
.x_external_RAM (RW) : ORIGIN = 0x4000, LENGTH = 0xBF80
.x_core_regs (RW) : ORIGIN = 0xFF80, LENGTH = 0x0000
}

# we ensure the interrupt vector section is not deadstripped here

KEEP_SECTION{ interrupt_vectors.text }

# place all executing code & data in external memory

SECTIONS
{

.interrupt_vectors_for_p_ram :
{
# from 56807_vector_pROM.asm
* (interrupt_vectors.text)

} > .p_interrupts_ext_RAM

.executing_code :
{
# .text sections

* (.text)
* (rtlib.text)
* (fp_engine.text)
* (startup.text)
* (user.text)
} > .p_external_RAM

.data :
{
# .data sections

* (.const.data)
* (fp_state.data)
* (rtlib.data)
* (.data)


# .bss sections

* (rtlib.bss.lo)

__bss_start = .;

* (.bss)

__bss_end = .;
__bss_size = __bss_end - __bss_start;

# setup the heap address

__heap_addr = .;
__heap_size = 0x1000; # larger heap for hostIO
__heap_end = __heap_addr + __heap_size;

. = __heap_end;

# setup the stack address

_min_stack_size = 0x0200;
__stack_addr = __heap_end;
__stack_end = __stack_addr + _min_stack_size;
. = __stack_end;

# set global vars now

# MSL uses these globals:
F_heap_addr = __heap_addr;
F_heap_end = __heap_end;
F_stack_addr = __stack_addr;

# stationery init code globals

F_bss_size = __bss_size;
F_bss_addr = __bss_start;

# next not used in this LCF
# we define anyway so init code will link
# these can be removed with removal of rom-to-ram
# copy code in init file

F_data_size = 0x0000;
F_data_RAM_addr = 0x0000;
F_data_ROM_addr = 0x0000;

F_rom_to_ram = 0x0000; # zero is no rom-to-ram copy

} > .x_external_RAM
}

# -------------------------------------------------------
# additional notes:


# about the reserved sections
# for this external RAM only LCF:

# p_interrupts_RAM -- reserved in external pRAM
# memory space reserved for interrupt vectors
# interrupt vectors must start at address zero
# interrupt vector space size is 0x80

# x_compiler_regs_iRAM -- reserved in internal xRAM
# The compiler uses page 0 address locations 0x30-0x40
# as register variables. See the Target manual for more info.

# notes:
# program memory (p memory)
# (RWX) read/write/execute for pRAM
# (RX) read/execute for flashed pROM

# data memory (X memory)
# (RW) read/write for xRAM
# (R) read for data flashed xROM

# LENGTH = next start address - previous
# LENGTH = 0x0000 means use all remaing memory

# revision history
# 011020 R4.1 a.h. first version
# 030220 R5.1 a.h. improved comments

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作者: strongchen    时间: 2007-9-19 10:00

这些文件一般不需要用户去修改。你为什么要修改？

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