最近總是有各種調(diào)試時(shí)的錯(cuò)誤,內(nèi)存錯(cuò)誤一般,我無意中發(fā)現(xiàn)的所有全局變量失敗,也就是說，全局變量聲明之后,頌值早期值誤.

初值明明是0x12345674,最后變?yōu)榱?xBA141234,出現(xiàn)了移位現(xiàn)象

測(cè)試代碼

//內(nèi)存測(cè)試,防止出現(xiàn)內(nèi)存異常,主要表現(xiàn)為全局變量初始化有問題 #define MEM_TEST 0x12345678 u32 MemTest = MEM_TEST;
_init_alloc(0x56000000, 0x60000000-8); //初始化堆的范圍pJpegBuff = (u8*)((u32)jpeg_buff + 16-(u32)jpeg_buff%16);UART0_Init(ENABLE,115200); //初始化串口0,失能中斷接收,波特率115200UART1_Init(DISABLE,115200);TFT_LCD_Init();//內(nèi)存檢查if(MemTest != MEM_TEST){uart_printf("內(nèi)存檢查錯(cuò)誤,地址:0x%08X\t0x%X!=0x%X\r\n",(u32)&MemTest, MemTest, MEM_TEST);}
結(jié)果:

一樣出現(xiàn)了移位想象

最后通過幾天的調(diào)試,把問題定位到了jpeg解碼的文件上面,僅僅要不調(diào)用jpegcode.c就不會(huì)出現(xiàn)故障

通過凝視代碼,發(fā)現(xiàn)問題再jpeg_tables.h,我將不須要用到的幾個(gè)數(shù)組屏蔽掉,居然攻克了這個(gè)問題,剛開始以為是由于在.h中定義了數(shù)組變量導(dǎo)致的,我所有移到.c文件里,問題依然,將幾個(gè)沒實(shí)用到的數(shù)組凝視掉,問題居然就好了.非常無語,不知道是否還有別的問題導(dǎo)致的.

/************************************************************************************************************** 文件名稱: jpeg_tables.h* 功能: S3C6410 jpeg編碼表* 作者: cp1300@139.com* 創(chuàng)建時(shí)間: 2013年01月14日* 最后改動(dòng)時(shí)間:2013年01月14日* 具體: 直接使用的官方的代碼 *************************************************************************************************************/ #ifndef __JPEG_TABLES_H__ #define __JPEG_TABLES_H__const unsigned char QTBL_Luminance[4][64]= {// level 1 - high quality{8, 6, 6, 8, 12, 14, 16, 17,6, 6, 6, 8, 10, 13, 12, 15,6, 6, 7, 8, 13, 14, 18, 24,8, 8, 8, 14, 13, 19, 24, 35,12, 10, 13, 13, 20, 26, 34, 39,14, 13, 14, 19, 26, 34, 39, 39,16, 12, 18, 24, 34, 39, 39, 39,17, 15, 24, 35, 39, 39, 39, 39},// level 2{12, 8, 8, 12, 17, 21, 24, 23,8, 9, 9, 11, 15, 19, 18, 23,8, 9, 10, 12, 19, 20, 27, 36,12, 11, 12, 21, 20, 28, 36, 53,17, 15, 19, 20, 30, 39, 51, 59,21, 19, 20, 28, 39, 51, 59, 59,24, 18, 27, 36, 51, 59, 59, 59,23, 23, 36, 53, 59, 59, 59, 59},// level 3{16, 11, 11, 16, 23, 27, 31, 30,11, 12, 12, 15, 20, 23, 23, 30,11, 12, 13, 16, 23, 26, 35, 47,16, 15, 16, 23, 26, 37, 47, 64,23, 20, 23, 26, 39, 51, 64, 64,27, 23, 26, 37, 51, 64, 64, 64,31, 23, 35, 47, 64, 64, 64, 64,30, 30, 47, 64, 64, 64, 64, 64},// level 4 - low quality{20, 16, 25, 39, 50, 46, 62, 68,16, 18, 23, 38, 38, 53, 65, 68,25, 23, 31, 38, 53, 65, 68, 68,39, 38, 38, 53, 65, 68, 68, 68,50, 38, 53, 65, 68, 68, 68, 68,46, 53, 65, 68, 68, 68, 68, 68,62, 65, 68, 68, 68, 68, 68, 68,68, 68, 68, 68, 68, 68, 68, 68} };const unsigned char QTBL_Chrominance[4][64]= {// level 1 - high quality{9, 8, 9, 11, 14, 17, 19, 24,8, 10, 9, 11, 14, 13, 17, 22,9, 9, 13, 14, 13, 15, 23, 26,11, 11, 14, 14, 15, 20, 26, 33,14, 14, 13, 15, 20, 24, 33, 39,17, 13, 15, 20, 24, 32, 39, 39,19, 17, 23, 26, 33, 39, 39, 39,24, 22, 26, 33, 39, 39, 39, 39},// level 2{13, 11, 13, 16, 20, 20, 29, 37,11, 14, 14, 14, 16, 20, 26, 32,13, 14, 15, 17, 20, 23, 35, 40,16, 14, 17, 21, 23, 30, 40, 50,20, 16, 20, 23, 30, 37, 50, 59,20, 20, 23, 30, 37, 48, 59, 59,29, 26, 35, 40, 50, 59, 59, 59,37, 32, 40, 50, 59, 59, 59, 59},// level 3{17, 15, 17, 21, 20, 26, 38, 48,15, 19, 18, 17, 20, 26, 35, 43,17, 18, 20, 22, 26, 30, 46, 53,21, 17, 22, 28, 30, 39, 53, 64,20, 20, 26, 30, 39, 48, 64, 64,26, 26, 30, 39, 48, 63, 64, 64,38, 35, 46, 53, 64, 64, 64, 64,48, 43, 53, 64, 64, 64, 64, 64},// level 4 - low quality{21, 25, 32, 38, 54, 68, 68, 68,25, 28, 24, 38, 54, 68, 68, 68,32, 24, 32, 43, 66, 68, 68, 68,38, 38, 43, 53, 68, 68, 68, 68,54, 54, 66, 68, 68, 68, 68, 68,68, 68, 68, 68, 68, 68, 68, 68,68, 68, 68, 68, 68, 68, 68, 68,68, 68, 68, 68, 68, 68, 68, 68}};/* const unsigned char QTBL0[64]= { #if 10x10, 0x0B, 0x0A, 0x10, 0x18, 0x28, 0x33, 0x3D,0x0C, 0x0C, 0x0E, 0x13, 0x1A, 0x3A, 0x3C, 0x37,0x0E, 0x0D, 0x10, 0x18, 0x28, 0x39, 0x45, 0x38,0x0E, 0x11, 0x16, 0x1D, 0x33, 0x57, 0x50, 0x3E,0x12, 0x16, 0x25, 0x38, 0x44, 0x6D, 0x67, 0x4D,0x18, 0x23, 0x37, 0x40, 0x51, 0x68, 0x71, 0x5C,0x31, 0x40, 0x4E, 0x57, 0x67, 0x79, 0x78, 0x65,0x48, 0x5C, 0x5F, 0x62, 0x70, 0x64, 0x67, 0x63 #else0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 #endif };//Added Quantization Table const unsigned char std_chrominance_quant_tbl_plus[64]= {0x11, 0x12, 0x18, 0x2F, 0x63, 0x63, 0x63, 0x63,0x12, 0x15, 0x1A, 0x42, 0x63, 0x63, 0x63, 0x63,0x18, 0x1A, 0x38, 0x63, 0x63, 0x63, 0x63, 0x63,0x2F, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63 };//Quantization Table0 unsigned char std_luminance_quant_tbl[64] = {1, 1, 2, 1, 1, 2, 2, 2,2, 3, 2, 2, 3, 3, 6, 4,3, 3, 3, 3, 7, 5, 8, 4,6, 8, 8, 10, 9, 8, 7, 11,8, 10, 14, 13, 11, 10, 10, 12,10, 8, 8, 11, 16, 12, 12, 13,15, 15, 15, 15, 9, 11, 16, 17,15, 14, 17, 13, 14, 14, 14, 1};//Quantization Table1 unsigned char std_chrominance_quant_tbl[64] = {4, 4, 4, 5, 4, 5, 9, 5,5, 9, 15, 10, 8, 10, 15, 26,19, 9, 9, 19, 26, 26, 26, 26,13, 26, 26, 26, 26, 26, 26, 26,26, 26, 26, 26, 26, 26, 26, 26,26, 26, 26, 26, 26, 26, 26, 26,26, 26, 26, 26, 26, 26, 26, 26,26, 26, 26, 26, 26, 26, 26, 26 };*///Huffman Table unsigned char HDCTBL0[16] = {0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0}; unsigned char HDCTBLG0[12] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb};unsigned char HACTBL0[16]= {0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d}; const unsigned char HACTBLG0[162]= {0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,0xf9, 0xfa }; /* //Huffman Table0 unsigned char len_dc_luminance[16] ={ 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; unsigned char val_dc_luminance[12] ={ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };unsigned char len_ac_luminance[16] ={ 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; unsigned char val_ac_luminance[162] = {0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,0xf9, 0xfa };//Huffman Table1 unsigned char len_dc_chrominance[16] ={ 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; unsigned char val_dc_chrominance[12] ={ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };unsigned char len_ac_chrominance[16] ={ 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; unsigned char val_ac_chrominance[162] = {0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,0x13, 0x22, 0x32, 0x81, 0x81, 0x08, 0x14, 0x42,0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52,0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24,0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a,0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37,0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47,0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57,0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67,0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77,0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86,0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95,0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4,0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3,0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2,0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca,0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9,0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,0xf8, 0xf9 };*/#endif //__JPEG_TABLES_H__
凝視掉部分沒實(shí)用到的數(shù)組,一般不建議在.h文件里定義變量(這是官黨碼).

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