最近总是有各种调试时的错误,内存错误一般,我无意中发现的所有全局变量失败,也就是说，全局变量声明之后,颂值早期值误.

初值明明是0x12345674,最后变为了0xBA141234,出现了移位现象

測试代码

  1. //内存測试,防止出现内存异常,主要表现为全局变量初始化有问题
  2. #define MEM_TEST	0x12345678
  3. u32 MemTest = MEM_TEST;
  1. 	_init_alloc(0x56000000, 0x60000000-8);		//初始化堆的范围
  2.  
  3. 	pJpegBuff = (u8*)((u32)jpeg_buff + 16-(u32)jpeg_buff%16);
  4. 	UART0_Init(ENABLE,115200);					//初始化串口0,失能中断接收,波特率115200
  5. 	UART1_Init(DISABLE,115200);
  6. 	TFT_LCD_Init();
  7. 	//内存检查
  8. 	if(MemTest != MEM_TEST)
  9. 	{
  10. 		uart_printf("内存检查错误,地址:0x%08X\t0x%X!=0x%X\r\n",(u32)&MemTest, MemTest, MEM_TEST);
  11. 	}

结果:

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一样出现了移位想象

最后通过几天的调试,把问题定位到了jpeg解码的文件上面,仅仅要不调用jpegcode.c就不会出现故障

通过凝视代码,发现问题再jpeg_tables.h,我将不须要用到的几个数组屏蔽掉,居然攻克了这个问题,刚開始以为是由于在.h中定义了数组变量导致的,我所有移到.c文件里,问题依然,将几个没实用到的数组凝视掉,问题居然就好了.非常无语,不知道是否还有别的问题导致的.

  1. /*************************************************************************************************************
  2.  * 文件名称:	jpeg_tables.h
  3.  * 功能:		S3C6410 jpeg编码表
  4.  * 作者:		cp1300@139.com
  5.  * 创建时间:	2013年01月14日
  6.  * 最后改动时间:2013年01月14日
  7.  * 具体:		直接使用的官方的代码
  8. *************************************************************************************************************/
  9. #ifndef __JPEG_TABLES_H__
  10. #define __JPEG_TABLES_H__
  11.  
  12. const unsigned char QTBL_Luminance[4][64]=
  13. {
  14.     // level 1 - high quality
  15.     {
  16.         8, 6, 6, 8, 12, 14, 16, 17,
  17.         6, 6, 6, 8, 10, 13, 12, 15,
  18.         6, 6, 7, 8, 13, 14, 18, 24,
  19.         8, 8, 8, 14, 13, 19, 24, 35,
  20.         12, 10, 13, 13, 20, 26, 34, 39,
  21.         14, 13, 14, 19, 26, 34, 39, 39,
  22.         16, 12, 18, 24, 34, 39, 39, 39,
  23.         17, 15, 24, 35, 39, 39, 39, 39
  24.     },
  25.  
  26.     // level 2
  27.     {
  28.         12, 8, 8, 12, 17, 21, 24, 23,
  29.         8, 9, 9, 11, 15, 19, 18, 23,
  30.         8, 9, 10, 12, 19, 20, 27, 36,
  31.         12, 11, 12, 21, 20, 28, 36, 53,
  32.         17, 15, 19, 20, 30, 39, 51, 59,
  33.         21, 19, 20, 28, 39, 51, 59, 59,
  34.         24, 18, 27, 36, 51, 59, 59, 59,
  35.         23, 23, 36, 53, 59, 59, 59, 59
  36.     },
  37.  
  38.     // level 3
  39.     {
  40.         16, 11, 11, 16, 23, 27, 31, 30,
  41.         11, 12, 12, 15, 20, 23, 23, 30,
  42.         11, 12, 13, 16, 23, 26, 35, 47,
  43.         16, 15, 16, 23, 26, 37, 47, 64,
  44.         23, 20, 23, 26, 39, 51, 64, 64,
  45.         27, 23, 26, 37, 51, 64, 64, 64,
  46.         31, 23, 35, 47, 64, 64, 64, 64,
  47.         30, 30, 47, 64, 64, 64, 64, 64
  48.  
  49.     },
  50.  
  51.     // level 4 - low quality
  52.     {
  53.         20, 16, 25, 39, 50, 46, 62, 68,
  54.         16, 18, 23, 38, 38, 53, 65, 68,
  55.         25, 23, 31, 38, 53, 65, 68, 68,
  56.         39, 38, 38, 53, 65, 68, 68, 68,
  57.         50, 38, 53, 65, 68, 68, 68, 68,
  58.         46, 53, 65, 68, 68, 68, 68, 68,
  59.         62, 65, 68, 68, 68, 68, 68, 68,
  60.         68, 68, 68, 68, 68, 68, 68, 68
  61.     }
  62. };
  63.  
  64. const unsigned char QTBL_Chrominance[4][64]=
  65. {
  66.     // level 1 - high quality
  67.     {
  68.         9, 8, 9, 11, 14, 17, 19, 24,
  69.         8, 10, 9, 11, 14, 13, 17, 22,
  70.         9, 9, 13, 14, 13, 15, 23, 26,
  71.         11, 11, 14, 14, 15, 20, 26, 33,
  72.         14, 14, 13, 15, 20, 24, 33, 39,
  73.         17, 13, 15, 20, 24, 32, 39, 39,
  74.         19, 17, 23, 26, 33, 39, 39, 39,
  75.         24, 22, 26, 33, 39, 39, 39, 39
  76.     },
  77.  
  78.     // level 2
  79.     {
  80.         13, 11, 13, 16, 20, 20, 29, 37,
  81.         11, 14, 14, 14, 16, 20, 26, 32,
  82.         13, 14, 15, 17, 20, 23, 35, 40,
  83.         16, 14, 17, 21, 23, 30, 40, 50,
  84.         20, 16, 20, 23, 30, 37, 50, 59,
  85.         20, 20, 23, 30, 37, 48, 59, 59,
  86.         29, 26, 35, 40, 50, 59, 59, 59,
  87.         37, 32, 40, 50, 59, 59, 59, 59
  88.     },
  89.  
  90.     // level 3
  91.     {
  92.         17, 15, 17, 21, 20, 26, 38, 48,
  93.         15, 19, 18, 17, 20, 26, 35, 43,
  94.         17, 18, 20, 22, 26, 30, 46, 53,
  95.         21, 17, 22, 28, 30, 39, 53, 64,
  96.         20, 20, 26, 30, 39, 48, 64, 64,
  97.         26, 26, 30, 39, 48, 63, 64, 64,
  98.         38, 35, 46, 53, 64, 64, 64, 64,
  99.         48, 43, 53, 64, 64, 64, 64, 64
  100.  
  101.     },
  102.  
  103.     // level 4 - low quality
  104.     {
  105.         21, 25, 32, 38, 54, 68, 68, 68,
  106.         25, 28, 24, 38, 54, 68, 68, 68,
  107.         32, 24, 32, 43, 66, 68, 68, 68,
  108.         38, 38, 43, 53, 68, 68, 68, 68,
  109.         54, 54, 66, 68, 68, 68, 68, 68,
  110.         68, 68, 68, 68, 68, 68, 68, 68,
  111.         68, 68, 68, 68, 68, 68, 68, 68,
  112.         68, 68, 68, 68, 68, 68, 68, 68
  113.  
  114.     }
  115.  
  116. };
  117.  
  118. /*
  119. const unsigned char QTBL0[64]=
  120. {
  121. #if 1
  122.     0x10, 0x0B, 0x0A, 0x10, 0x18, 0x28, 0x33, 0x3D,
  123.     0x0C, 0x0C, 0x0E, 0x13, 0x1A, 0x3A, 0x3C, 0x37,
  124.     0x0E, 0x0D, 0x10, 0x18, 0x28, 0x39, 0x45, 0x38,
  125.     0x0E, 0x11, 0x16, 0x1D, 0x33, 0x57, 0x50, 0x3E,
  126.     0x12, 0x16, 0x25, 0x38, 0x44, 0x6D, 0x67, 0x4D,
  127.     0x18, 0x23, 0x37, 0x40, 0x51, 0x68, 0x71, 0x5C,
  128.     0x31, 0x40, 0x4E, 0x57, 0x67, 0x79, 0x78, 0x65,
  129.     0x48, 0x5C, 0x5F, 0x62, 0x70, 0x64, 0x67, 0x63
  130. #else
  131.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  132.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  133.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  134.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  135.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  136.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  137.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
  138.     0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
  139. #endif
  140. };
  141.  
  142. //Added Quantization Table
  143. const unsigned char std_chrominance_quant_tbl_plus[64]=
  144. {
  145.     0x11, 0x12, 0x18, 0x2F, 0x63, 0x63, 0x63, 0x63,
  146.     0x12, 0x15, 0x1A, 0x42, 0x63, 0x63, 0x63, 0x63,
  147.     0x18, 0x1A, 0x38, 0x63, 0x63, 0x63, 0x63, 0x63,
  148.     0x2F, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
  149.     0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
  150.     0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
  151.     0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
  152.     0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63
  153. };
  154.  
  155. //Quantization Table0
  156. unsigned char std_luminance_quant_tbl[64] =
  157. {
  158.     1,   1,   2,   1,   1,   2,   2,   2,
  159.     2,   3,   2,   2,   3,   3,   6,   4,
  160.     3,   3,   3,   3,   7,   5,   8,   4,
  161.     6,   8,   8,  10,   9,   8,   7,  11,
  162.     8,  10,  14,  13,  11,  10,  10,  12,
  163.     10,   8,   8,  11,  16,  12,  12,  13,
  164.     15,  15,  15,  15,   9,  11,  16,  17,
  165.     15,  14,  17,  13,  14,  14,  14,   1
  166.  };
  167.  
  168. //Quantization Table1
  169. unsigned char std_chrominance_quant_tbl[64] =
  170. {
  171.     4,   4,   4,   5,   4,   5,   9,   5,
  172.     5,   9,  15,  10,   8,  10,  15,  26,
  173.     19,   9,   9,  19,  26,  26,  26,  26,
  174.     13,  26,  26,  26,  26,  26,  26,  26,
  175.     26,  26,  26,  26,  26,  26,  26,  26,
  176.     26,  26,  26,  26,  26,  26,  26,  26,
  177.     26,  26,  26,  26,  26,  26,  26,  26,
  178.     26,  26,  26,  26,  26,  26,  26,  26
  179. };*/
  180.  
  181. //Huffman Table
  182. unsigned char HDCTBL0[16]  = {0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0};
  183. unsigned char HDCTBLG0[12] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb};
  184.  
  185. unsigned char HACTBL0[16]= {0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d};
  186. const unsigned char HACTBLG0[162]=
  187. {
  188.     0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
  189.     0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
  190.     0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
  191.     0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
  192.     0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
  193.     0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
  194.     0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
  195.     0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
  196.     0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
  197.     0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
  198.     0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
  199.     0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
  200.     0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
  201.     0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
  202.     0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
  203.     0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
  204.     0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
  205.     0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
  206.     0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
  207.     0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
  208.     0xf9, 0xfa
  209. };
  210. /*
  211. //Huffman Table0
  212. unsigned char len_dc_luminance[16] ={ 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
  213. unsigned char val_dc_luminance[12] ={ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
  214.  
  215. unsigned char len_ac_luminance[16] ={ 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
  216. unsigned char val_ac_luminance[162] =
  217. {
  218.     0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
  219.     0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
  220.     0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
  221.     0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
  222.     0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
  223.     0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
  224.     0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
  225.     0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
  226.     0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
  227.     0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
  228.     0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
  229.     0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
  230.     0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
  231.     0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
  232.     0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
  233.     0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
  234.     0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
  235.     0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
  236.     0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
  237.     0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
  238.     0xf9, 0xfa
  239. };
  240.  
  241. //Huffman Table1
  242. unsigned char len_dc_chrominance[16] ={ 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
  243. unsigned char val_dc_chrominance[12] ={ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
  244.  
  245. unsigned char len_ac_chrominance[16] ={ 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
  246. unsigned char val_ac_chrominance[162] =
  247. {
  248.     0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
  249.     0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
  250.     0x13, 0x22, 0x32, 0x81, 0x81, 0x08, 0x14, 0x42,
  251.     0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52,
  252.     0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24,
  253.     0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a,
  254.     0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37,
  255.     0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47,
  256.     0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57,
  257.     0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67,
  258.     0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77,
  259.     0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86,
  260.     0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95,
  261.     0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4,
  262.     0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3,
  263.     0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,
  264.     0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca,
  265.     0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,
  266.     0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,
  267.     0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
  268.     0xf8, 0xf9
  269. };*/
  270.  
  271. #endif	//__JPEG_TABLES_H__

凝视掉部分没实用到的数组,一般不建议在.h文件里定义变量(这是官党码).

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