TI中文支持网Part Number:TMS320F28377D
如题所示，我是利用EMIF对SRAM进行写入，当我写入小于65536个数据就可以正常写入，超过65536个数据就不行，就会卡在图里面的for循环中，但是length的定义length_t是灰色的，又无法知道他是什么类型，我该怎么办呢？我怀疑就是length_t的长度不够，65536刚好就是16位，里面的CHAR_BIT怎么修改呢？
/*****************************************************************************/
/* copy_decompress_lzss.c*/
/**/
/* Copyright (c) 2006 Texas Instruments Incorporated*/
/* http://www.ti.com/*/
/**/
/* Redistribution and use in source and binary forms, with or without*/
/* modification, are permitted provided that the following conditions*/
/* are met:*/
/**/
/*Redistributions of source code must retain the above copyright*/
/*notice, this list of conditions and the following disclaimer.*/
/**/
/*Redistributions in binary form must reproduce the above copyright*/
/*notice, this list of conditions and the following disclaimer in*/
/*the documentation and/orother materials provided with the*/
/*distribution.*/
/**/
/*Neither the name of Texas Instruments Incorporated nor the names*/
/*of its contributors may be used to endorse or promote products*/
/*derived fromthis software withoutspecific prior written*/
/*permission.*/
/**/
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS*/
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT*/
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR*/
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT*/
/* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,*/
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT*/
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,*/
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY*/
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT*/
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE*/
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.*/
/**/
/**/
/* Decompress routine for Lempel-Ziv-Storer-Szymanski (LZSS) compression.*/
/* Given an input buffer with data compressed using LZSS encoding and an*/
/* output buffer, this routine decompresses the data in the output buffer.*/
/**/
/* NOTE:*/
/* 1. This routine could be used to copy uninitialized or initialized global */
/*data space of a program. Hence this routine cannot define any global*/
/*variable.*/
/* 2. This routine will never be used to initialize stack space and hence*/
/*all the variables are allocated to stack.*/
/* 3. The calling application should ensure the output buffer is big*/
/*enough to hold the uncompressed data.*/
/**/
/*****************************************************************************/
#include <stdint.h>
#include <limits.h>
#define LZSS_EOD4095
#define LZSS_WINDOW_SIZE4095
/*****************************************************************************/
/* The offset is always 12-bits so use a 16-bit type.*/
/*****************************************************************************/
typedef uint_fast16_t offset_t;
#if CHAR_BIT == 8
/*****************************************************************************/
/* The max length is 2^15-1+18, which can fit in a 16-bit type.*/
/*****************************************************************************/
typedef uint_fast16_t length_t;
/*****************************************************************************/
/* Flags is always of length 1 char.*/
/*****************************************************************************/
typedef uint_fast8_t flags_t;
#elif CHAR_BIT == 16
/*****************************************************************************/
/* The max length =s 2^16-1+17, which may not fit in a 16-bit type, so use a */
/* 32-bit type.*/
/*****************************************************************************/
typedef uint_fast32_t length_t;
/*****************************************************************************/
/* Flags is always of length 1 char.*/
/*****************************************************************************/
typedef uint_fast16_t flags_t;
#else
#error Illegal value for CHAR_BIT
#endif
/*****************************************************************************/
/* MSP copy tables can handle moving functions even in small data model +*/
/* large code model, where data pointers are not big enough to represent*/
/* function pointers. This requires the EABI decompression functions*/
/* (SHARED/copy_*.c) to be changed to accept "far" pointers. For this*/
/* memory model combination, the decompression functions are changed to use */
/* "unsigned long" to represent function pointers, so function pointers*/
/* through which we call these functions also needs to have a prototype*/
/* accepting "unsigned long" instead of pointer types. All other memory*/
/* model combinations use the same prototype that all the other targets use: */
/* two data pointer arguments. Ultimately we use MSP peek/poke intrinsics*/
/* to read/write the "far" memory.*/
/*****************************************************************************/
#if defined(__MSP430__) && defined(__LARGE_CODE_MODEL__) && !defined(__LARGE_DATA_MODEL__)
typedef unsigned long pointer_t;
typedef unsigned long pointer_to_const_t;
#define READ_CHAR_ADV(x)__data20_read_char(x++)
#define WRITE_CHAR_ADV(x, c) __data20_write_char(x++, c)
#else
typedefunsigned char *pointer_t;
typedef const unsigned char *pointer_to_const_t;
#define READ_CHAR_ADV(x)(*x++)
#define WRITE_CHAR_ADV(x,c) (*x++ = (c))
#endif
/*****************************************************************************/
/**/
/* __TI_DECOMPRESS_LZSS() - Decompress data encoded using LZSS encoding.*/
/*Input buffer (inbuf) has the encoded data and*/
/*uncompressed data is returned in outbuf.*/
/**/
/*****************************************************************************/
__attribute__((section(".text:decompress:lzss")))
void __TI_decompress_lzss(pointer_to_const_t inbuf, pointer_t outbuf)
{while (1){flags_t flags = READ_CHAR_ADV(inbuf);int i;for (i=0; i<CHAR_BIT ; i++){if (flags & 0x1){/*---------------------------------------------------------------*//* We have an uncoded byte, just write it out.*//*---------------------------------------------------------------*/WRITE_CHAR_ADV(outbuf, READ_CHAR_ADV(inbuf));}else{/*---------------------------------------------------------------*//* Read and unpack the offset and length*//*---------------------------------------------------------------*/offset_t offset;length_t length;
#if CHAR_BIT == 8offset = READ_CHAR_ADV(inbuf);length = READ_CHAR_ADV(inbuf);offset <<= 4;offset |= ((length & 0x00F0) >> 4);length = (length & 0x000F) + 3;/*---------------------------------------------------------------*//* If the length is 3->17, we only use 4 bits. If the length is *//* >= 18, we read an additional 8 bits and add it to the length. *//**//* If the msb of the second byte is 1, we read an additional*//* 8 bits and use that for bits 7-14 of the length. This gives*//* us a range of 3->32785.*//*---------------------------------------------------------------*/if (length == 18){length_t length2 = READ_CHAR_ADV(inbuf);if (length2 & 0x80){length_t length3 = READ_CHAR_ADV(inbuf);length2 = (length2 & 0x7f) | (length3 << 7);}length += length2;}
#elif CHAR_BIT == 16unsigned char temp = READ_CHAR_ADV(inbuf);length = (temp & 0xf) + 2;offset = temp >> 4;/*---------------------------------------------------------------*//* If the length is the maximum value encoded in 4 bits, read an *//* additional 16-bit value and add it to the length.*//*---------------------------------------------------------------*/if (length == 17)length += READ_CHAR_ADV(inbuf);
#endif/*---------------------------------------------------------------*//* If the offset indicates end of data, exit.*//*---------------------------------------------------------------*/if (offset == LZSS_EOD)return;/*---------------------------------------------------------------*//* Copy the decoded string from sliding window to output buffer. *//*---------------------------------------------------------------*/length_t j;pointer_t pos = outbuf - offset - 1;for (j = 0; j < length; j++)WRITE_CHAR_ADV(outbuf, READ_CHAR_ADV(pos));}flags >>= 1;}}
}
Eirwen：
已经收到了您的案例，调查需要些时间，感谢您的耐心等待。
,
zhisheng xiong：
请问copy_decompress_lzss.c这个文件是什么作用？以及是在main函数运行之前启用吗？为什么我会卡在这个文件里面呢？
