关于DSP的问题2
各位高手，小弟正在基于DSP开发语音处理功能，采集语音数据，进行压缩、解压缩和播放。第三方的DEMO中提供了语音采集与播放代码，已经测试通过。从网上下载了G.711压缩解压缩算法源码，将压缩解压缩代码添加到第三方的DEMO中，编译的时候提示“program will not fitinto available”。修改链接命令文件28335_RAM_lnk.cmd，将其中一行
“RAML:origin= 0x008000,Length = 0x004000”改为
“RAML:origin= 0x008000,Length = 0x00A000”
重新编译通过。点击DEBUG按钮进行调试，系统提示：“loader:oneor more sections of your program falls into a memory region that is notwritable”。请教其中的原因。谢谢！语音采集、压缩、解压缩以及播放部分代码如下：
interrupt void ISRMcbspSend(void)
{
inttemp;
//int encode_buf[500];
unsignedcharencode_buf[512];
int*outputSizeBytesE;
int*outputSizeBytesD;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP6;//中断组6的请求被发送至CPU，其他中断被阻塞
temp=McbspaRegs.DRR1.all;//接收音频数据
/*设置接收缓冲区的指针，缓冲区最大值为500*/
DA_rptr++;
if(DA_rptr>=500)
{
//g711_encode->Encode(ADbuf, 500 , encode_buf , outputSizeBytes);
DA_rptr=0;
}
g711_encode->Encode(&temp , 2 , encode_buf ,outputSizeBytesE);
g711_encode->Decode(encode_buf, *outputSizeBytesE , &temp,outputSizeBytesD);
ADbuf[DA_rptr]=temp; //保存录音数据
if(play_mode==0)
McbspaRegs.DXR1.all = y;
//警报声的幅值
else
McbspaRegs.DXR1.all = temp; //放音
}
链接命令文件如下：
/*
Contiguous SARAM memory blocks can becombined
if required to create a larger memoryblock.
*/
MEMORY
{
PAGE 0 :
/* BEGIN is used for the "boot toSARAM" bootloader mode */
/* BOOT_RSVD is used by the boot ROM forstack. */
/* This section is only reserved to keepthe BOOT ROM from */
/* corrupting this area during the debugprocess */
BEGIN : origin = 0x000000,length = 0x000002 /* Boot to M0 will go here */
BOOT_RSVD : origin = 0x000002,length = 0x00004E /* Part of M0, BOOT rom will use this for stack */
RAMM0 : origin = 0x000050,length = 0x0003B0
/*
RAML0 : origin = 0x008000,length = 0x001000
RAML1 : origin = 0x009000,length = 0x001000
RAML2 : origin = 0x00A000,length = 0x001000
RAML3 : origin = 0x00B000,length = 0x001000
*/
RAML : origin = 0x008000,length = 0x004000
//RAML : origin = 0x00A000, length = 0x004000
ZONE7A : origin = 0x200000,length = 0x00FC00 /* XINTF zone 7 - program space */
CSM_RSVD : origin = 0x33FF80,length = 0x000076 /* Part of FLASHA. Program with all 0x0000 when CSM is in use. */
CSM_PWL : origin = 0x33FFF8,length = 0x000008 /* Part of FLASHA. CSM password locations in FLASHA */
ADC_CAL : origin = 0x380080,length = 0x000009
RESET : origin = 0x3FFFC0,length = 0x000002
IQTABLES : origin = 0x3FE000,length = 0x000b50
IQTABLES2 : origin = 0x3FEB50,length = 0x00008c
FPUTABLES : origin = 0x3FEBDC,length = 0x0006A0
BOOTROM : origin = 0x3FF27C,length = 0x000D44
PAGE 1 :
RAMM : origin = 0x000400,length = 0x000400 /* on-chip RAM block M1 */
/*
RAML4 : origin = 0x00C000,length = 0x001000
RAML5 : origin = 0x00D000,length = 0x001000
RAML6 : origin = 0x00E000,length = 0x001000
RAML7 : origin = 0x00F000,length = 0x001000
*/
//RAMH : origin = 0x00C000, length = 0x004000
RAMH : origin = 0x00C000,length = 0x004000
ZONE7B : origin = 0x20FC00,length = 0x000400 /* XINTF zone 7 - data space */
}
SECTIONS
{
/* Setup for "boot to SARAM"mode:
The codestart section (found inDSP28_CodeStartBranch.asm)
re-directs execution to the start of usercode. */
codestart : >BEGIN, PAGE = 0
ramfuncs : > RAML, PAGE = 0
.text : > RAML, PAGE = 0
.cinit : > RAML, PAGE = 0
.pinit : > RAML, PAGE = 0
.switch : > RAML, PAGE = 0
.stack : > RAMM, PAGE = 1
.ebss : > RAMH, PAGE = 1
.econst : > RAMH, PAGE = 1
.esysmem : > RAMM, PAGE = 1
IQmath : > RAML, PAGE = 0
IQmathTables : >IQTABLES, PAGE = 0, TYPE = NOLOAD
IQmathTables2 : > IQTABLES2,PAGE= 0, TYPE= NOLOAD
FPUmathTables : > FPUTABLES,PAGE= 0, TYPE= NOLOAD
/*
DMARAML4 : >RAML4, PAGE = 1
DMARAML5 : >RAML5, PAGE = 1
DMARAML6 : >RAML6, PAGE = 1
DMARAML7 : >RAML7, PAGE = 1
*/
ZONE7DATA : >ZONE7B, PAGE = 1
.reset : >RESET, PAGE = 0, TYPE = DSECT /* notused */
csm_rsvd : >CSM_RSVD PAGE = 0, TYPE = DSECT /* not used forSARAM examples */
csmpasswds : >CSM_PWL PAGE = 0, TYPE = DSECT /* not used forSARAM examples */
/* Allocate ADC_cal function(pre-programmed by factory into TI reserved memory) */
.adc_cal : load =ADC_CAL, PAGE = 0, TYPE = NOLOAD
}
/*
//===========================================================================
// End of file.
//===========================================================================
*/这个问题应该是编译的程序过大，无法载入内存中导致的，看你的修改
“RAML:origin= 0x008000,Length = 0x004000”改为
“RAML:origin= 0x008000,Length = 0x00A000”
计算一下，0x008000+0x00A000 = 0x012000
再看看PAGE1的RAMH，是从0xC000开始的，就是说PAGE0的RAML已经覆盖PAGE1的RAMH，这样编译的时候可能没问题，但是载入的时候当然不行
你应该按实际的使用情况，重新分配L0-L7内存的使用，程序区和数据区不应该重叠，而且要满足需求
我看你ZONE7也使用了，说明你的板子上有外部存储器，可以考虑使用这个，把代码段全部放到外部空间，不就不用纠结内存够不够啦
.text : > ZONE7A, PAGE = 0
谢谢您，我按照您说的改进了存储分配，但是问题依然存在。