LPC2478 RAM合并问题请教

saddam911

各位有没有用LPC2478或者这个系列的片子的？LPC2478有98kB RAM其中CPU用的64kB，以太网用的16kB，DMA用的16kB，
现在我64kB的RAM不够用了，想把以太网或者DMA的RAM给CPU用，我用的IAR，根据IAR开发指导中的描述修改了一下，但是程序跑起来问题很多，大家有谁这么干过的给指导一下啊！

红色的代码是我改的，

/*###ICF### Section handled by ICF editor, don't touch! ****/
/*-Editor annotation file-*/
/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\a_v1_0.xml" */
/*-Specials-*/
define symbol __ICFEDIT_intvec_start__ = 0x00000000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_ROM_start__ = 0x00000044;
define symbol __ICFEDIT_region_ROM_end__   = 0x0007FFFF;
define symbol __ICFEDIT_region_RAM_start__ = 0x40000040;
define symbol __ICFEDIT_region_RAM_end__   = 0x4000FFFF;
/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__   = 0x500;
define symbol __ICFEDIT_size_svcstack__ = 0x100;
define symbol __ICFEDIT_size_irqstack__ = 0x100;
define symbol __ICFEDIT_size_fiqstack__ = 0x40;
define symbol __ICFEDIT_size_undstack__ = 0x10;
define symbol __ICFEDIT_size_abtstack__ = 0x10;
define symbol __ICFEDIT_size_heap__     = 0x4000;
/**** End of ICF editor section. ###ICF###*/

define symbol __region_EMAC_DMA_RAM_start__ = 0x7FE00000;
define symbol __region_EMAC_DMA_RAM_end__   = 0x7FE03FFF;

define memory mem with size = 4G;
define region ROM_region        = mem:[from __ICFEDIT_region_ROM_start__            to __ICFEDIT_region_ROM_end__];
define region RAM_region        = mem:[from __ICFEDIT_region_RAM_start__            to __ICFEDIT_region_RAM_end__]
                                 |mem:[from __region_EMAC_DMA_RAM_start__  to __region_EMAC_DMA_RAM_end__];

define symbol __region_USB_DMA_RAM_start__  = 0x7FD00000;
define symbol __region_USB_DMA_RAM_end__    = 0x7FD03FFF;
define region USB_DMA_RAM_region= mem:[from __region_USB_DMA_RAM_start__    to __region_USB_DMA_RAM_end__];

define symbol __region_SDRAM_RAM_start__ = 0xA0000000;
define symbol __region_SDRAM_RAM_end__   = 0xA1FFFFFF;
define region SDRAM_region= mem:[from __region_SDRAM_RAM_start__  to __region_SDRAM_RAM_end__];

define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { };
define block SVC_STACK with alignment = 8, size = __ICFEDIT_size_svcstack__ { };
define block IRQ_STACK with alignment = 8, size = __ICFEDIT_size_irqstack__ { };
define block FIQ_STACK with alignment = 8, size = __ICFEDIT_size_fiqstack__ { };
define block UND_STACK with alignment = 8, size = __ICFEDIT_size_undstack__ { };
define block ABT_STACK with alignment = 8, size = __ICFEDIT_size_abtstack__ { };
define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { };

initialize by copy { readwrite };
do not initialize  { section .noinit };
do not initialize  { section USB_DMA_RAM };

place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };

place in ROM_region   { readonly };
place in RAM_region   { readwrite section .bss,readwrite section .iar.dynexit,
                        readwrite section .data,block CSTACK, block SVC_STACK, block IRQ_STACK, block FIQ_STACK,
                        block UND_STACK, block ABT_STACK,};
place in USB_DMA_RAM_region
                      {block HEAP};
place in SDRAM_region { readwrite data section SDRAM };
define exported symbol SDRAM_BASE_ADDR = __region_SDRAM_RAM_start__;

mon51

建议你果断换片子。

saddam911

mon51 发表于 2014-7-3 08:54
建议你果断换片子。

换片子也可以，但是还想这样搞一搞，毕竟LPC2478的datasheet上写着“16 kB SRAM for Ethernet interface. Can also be used as general purpose SRAM.”所以我想这样应该肯定能实现。