基于磁阻傳感器的寬量程轉(zhuǎn)速測(cè)量電路設(shè)計(jì) 針對(duì)工程中高速寬范圍轉(zhuǎn)速測(cè)量需求,提出了一種基于磁阻傳感器的寬量程轉(zhuǎn)速測(cè)量方法。設(shè)計(jì)了轉(zhuǎn)速信號(hào)調(diào)理電路 ,著重對(duì)實(shí)際應(yīng)用中因磁場(chǎng)不對(duì)稱、 測(cè)量轉(zhuǎn)速范圍寬引起測(cè)量不可靠問(wèn)題進(jìn)行了分析和實(shí)驗(yàn)研究 ,最終 ,確定了轉(zhuǎn)速信號(hào)調(diào)理電路參數(shù) ,使得在最高轉(zhuǎn)速達(dá) 120 000 r /min的條件下工作可靠 ,并成功應(yīng)用于微型渦噴發(fā)動(dòng)機(jī)控制系統(tǒng)。
標(biāo)簽： 轉(zhuǎn)速 磁阻傳感器 寬量程 寬
上傳時(shí)間： 2014-01-16
上傳用戶：13681659100
Aidaohuakai( 樓主 ) 2013-8-22 11:45:24 只看該作者23307 | 41倒序?yàn)g覽 論壇上對(duì)mpu6050的資料和討論并不多，很多壇友都說(shuō)驅(qū)動(dòng)失敗，老是顯示0. 以下就談?wù)勎业囊恍┭c淚的教訓(xùn)： 昨天開(kāi)始接觸mpu6050，在網(wǎng)上查了很多資料，下載程序，準(zhǔn)備一展身手。首先看了mpu6050中文資料，之后又看了那個(gè)mpu6050的測(cè)試程序，把這些看明白之后就開(kāi)始寫(xiě)程序了。我不是直接把程序復(fù)制過(guò)去，只是復(fù)制mpu6050的地址和初始化，IIC并沒(méi)有復(fù)制，就復(fù)制我上次寫(xiě)的24C02的那個(gè)程序，想不到，這給了我血與淚的教訓(xùn)，我原來(lái)是直接把IIC復(fù)制過(guò)來(lái)的，并沒(méi)有多留意。之后初始化mpu6050，寫(xiě)入地址，讀出數(shù)據(jù)，下載到單片機(jī)之后，LCD上顯示000001，我感到郁悶，之后又調(diào)試，以為是顯示不對(duì)，又寫(xiě)顯示，之后又下載，結(jié)果還是老樣，這樣半天就過(guò)去了。驅(qū)動(dòng)沒(méi)成功，又懷疑芯片或引腳有問(wèn)題，繼續(xù)調(diào)試，也沒(méi)成功。就一一對(duì)應(yīng)地看了地址，又看了初始化，發(fā)現(xiàn)沒(méi)錯(cuò)，調(diào)試還是不成功。最后干脆不接IIC總線，竟然發(fā)現(xiàn)了個(gè)天大的秘密，接不接IIC，LCD都顯示000001，我又用示波器測(cè)試波形，發(fā)現(xiàn)波形正確。在網(wǎng)上又查了別人的資料，在論壇上也很少有關(guān)于mpu6050的資料，也看了比別人的一些討論。很多壇友都說(shuō)驅(qū)動(dòng)失敗，老是顯示0. 沒(méi)辦法，一天就這樣過(guò)去了，今天早上，我又仔細(xì)看了程序，出乎我的想象，竟然是IIC的那個(gè)地址沒(méi)改，原來(lái)寫(xiě)24C02的那個(gè)地址是a0，還是原封不動(dòng)，把我嚇了一跳。把這些改過(guò)來(lái)之后，一切正常，能顯示加速度和陀螺儀。血與淚的教訓(xùn)啊，是自己不細(xì)心造成的，忘記改地址！今天早上竟然花了不到2個(gè)鐘就調(diào)出來(lái)了，驚喜之時(shí)就寫(xiě)了這個(gè)分享，希望對(duì)大家有用。
標(biāo)簽： 圓點(diǎn)博士小四軸
上傳時(shí)間： 2015-04-14
上傳用戶：wusheng4495
/* ********************************************************************************************************* * uC/TCP-IP V2 * The Embedded TCP/IP Suite * * (c) Copyright 2003-2010; Micrium, Inc.; Weston, FL * * All rights reserved. Protected by international copyright laws. * * uC/TCP-IP is provided in source form to registered licensees ONLY. It is * illegal to distribute this source code to any third party unless you receive * written permission by an authorized Micrium representative. Knowledge of * the source code may NOT be used to develop a similar product. * * Please help us continue to provide the Embedded community with the finest * software available. Your honesty is greatly appreciated. * * You can contact us at www.micrium.com. ********************************************************************************************************* */ /* ********************************************************************************************************* * * NETWORK TCP LAYER * (TRANSMISSION CONTROL PROTOCOL) * * Filename : net_tcp.h * Version : V2.10 * Programmer(s) : ITJ ********************************************************************************************************* * Note(s) : (1) Supports Transmission Control Protocol as described in RFC #793 with the following * restrictions/constraints : * * (a) TCP Security & Precedence NOT supported RFC # 793, Section 3.6 * * (b) TCP Urgent Data NOT supported RFC # 793, Section 3.7 * 'The Communication of * Urgent Information' * * (c) The following TCP options NOT supported : * * (1) Window Scale RFC #1072, Section 2 * RFC #1323, Section 2 * (2) Selective Acknowledgement (SACK) RFC #1072, Section 3 * RFC #2018 * RFC #2883 * (3) TCP Echo RFC #1072, Section 4 * (4) Timestamp RFC #1323, Section 3.2 * (5) Protection Against Wrapped Sequences (PAWS) RFC #1323, Section 4 * * (d) #### IP-Options-to-TCP-Connection RFC #1122, Section 4.2.3.8 * Handling NOT supported * * (e) #### ICMP-Error-Message-to-TCP-Connection RFC #1122, Section 4.2.3.9 * Handling NOT currently supported * * (2) TCP Layer assumes/requires Network Socket Layer (see 'net_sock.h MODULE Note #1a2'). ********************************************************************************************************* */ /*$PAGE*/ /* ********************************************************************************************************* * MODULE * * Note(s) : (1) TCP Layer module is NOT required for UDP-to-Application API configuration. * * See also 'net_cfg.h TRANSPORT LAYER CONFIGURATION' * & 'net_cfg.h USER DATAGRAM PROTOCOL LAYER CONFIGURATION'. * * See also 'net_tcp.h Note #2'. * * (2) The following TCP-module-present configuration value MUST be pre-#define'd in * 'net_cfg_net.h' PRIOR to all other network modules that require TCP Layer * configuration (see 'net_cfg_net.h TCP LAYER CONFIGURATION Note #2b') : * * NET_TCP_MODULE_PRESENT ********************************************************************************************************* */ #ifdef NET_TCP_MODULE_PRESENT /* See Note #2. */ /* ********************************************************************************************************* * EXTERNS ********************************************************************************************************* */ #if ((defined(NET_TCP_MODULE)) && \ (defined(NET_GLOBALS_EXT))) #define NET_TCP_EXT #else #define NET_TCP_EXT extern #endif /*$PAGE*/ /* ********************************************************************************************************* * DEFINES ********************************************************************************************************* */ /* ********************************************************************************************************* * TCP HEADER DEFINES * * Note(s) : (1) The following TCP value MUST be pre-#define'd in 'net_def.h' PRIOR to 'net_buf.h' so that * the Network Buffer Module can configure maximum buffer header size (see 'net_def.h TCP * LAYER DEFINES' & 'net_buf.h NETWORK BUFFER INDEX & SIZE DEFINES Note #1') : * * (a) NET_TCP_HDR_SIZE_MAX 60 (NET_TCP_HDR_LEN_MAX * * NET_TCP_HDR_LEN_WORD_SIZE) * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_LEN_MASK 0xF000u #define NET_TCP_HDR_LEN_SHIFT 12u #define NET_TCP_HDR_LEN_NONE 0u #define NET_TCP_HDR_LEN_MIN 5u #define NET_TCP_HDR_LEN_MAX 15u #define NET_TCP_HDR_LEN_WORD_SIZE CPU_WORD_SIZE_32 #define NET_TCP_HDR_SIZE_MIN (NET_TCP_HDR_LEN_MIN * NET_TCP_HDR_LEN_WORD_SIZE) #if 0 /* See Note #1a. */ #define NET_TCP_HDR_SIZE_MAX (NET_TCP_HDR_LEN_MAX * NET_TCP_HDR_LEN_WORD_SIZE) #endif #define NET_TCP_HDR_SIZE_TOT_MIN (NET_IP_HDR_SIZE_TOT_MIN + NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_SIZE_TOT_MAX (NET_IP_HDR_SIZE_TOT_MAX + NET_TCP_HDR_SIZE_MAX) #define NET_TCP_PSEUDO_HDR_SIZE 12u /* = sizeof(NET_TCP_PSEUDO_HDR) */ #define NET_TCP_PORT_NBR_RESERVED NET_PORT_NBR_RESERVED #define NET_TCP_PORT_NBR_NONE NET_TCP_PORT_NBR_RESERVED #define NET_TCP_HDR_URG_PTR_NONE 0x0000u /* See Note #2. */ /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER FLAG DEFINES * * Note(s) : (1) See 'TCP HEADER Note #2' for flag fields. * * (2) Urgent pointer & data NOT supported (see 'net_tcp.h Note #1b'). ********************************************************************************************************* */ #define NET_TCP_HDR_FLAG_MASK 0x0FFFu #define NET_TCP_HDR_FLAG_NONE DEF_BIT_NONE #define NET_TCP_HDR_FLAG_RESERVED 0x0FE0u /* MUST be '0'. */ #define NET_TCP_HDR_FLAG_URGENT DEF_BIT_05 /* See Note #2. */ #define NET_TCP_HDR_FLAG_ACK DEF_BIT_04 #define NET_TCP_HDR_FLAG_PUSH DEF_BIT_03 #define NET_TCP_HDR_FLAG_RESET DEF_BIT_02 #define NET_TCP_HDR_FLAG_SYNC DEF_BIT_01 #define NET_TCP_HDR_FLAG_FIN DEF_BIT_00 #define NET_TCP_HDR_FLAG_CLOSE NET_TCP_HDR_FLAG_FIN /* ********************************************************************************************************* * TCP FLAG DEFINES ********************************************************************************************************* */ /* ------------------ NET TCP FLAGS ------------------- */ #define NET_TCP_FLAG_NONE DEF_BIT_NONE #define NET_TCP_FLAG_USED DEF_BIT_00 /* TCP conn cur used; i.e. NOT in free TCP conn pool. */ /* ------------------ TCP TX FLAGS ------------------- */ /* TCP tx flags copied from TCP hdr flags. */ #define NET_TCP_FLAG_TX_FIN NET_TCP_HDR_FLAG_FIN #define NET_TCP_FLAG_TX_CLOSE NET_TCP_FLAG_TX_FIN #define NET_TCP_FLAG_TX_SYNC NET_TCP_HDR_FLAG_SYNC #define NET_TCP_FLAG_TX_RESET NET_TCP_HDR_FLAG_RESET #define NET_TCP_FLAG_TX_PUSH NET_TCP_HDR_FLAG_PUSH #define NET_TCP_FLAG_TX_ACK NET_TCP_HDR_FLAG_ACK #define NET_TCP_FLAG_TX_URGENT NET_TCP_HDR_FLAG_URGENT #define NET_TCP_FLAG_TX_BLOCK DEF_BIT_07 /* ------------------ TCP RX FLAGS ------------------- */ #define NET_TCP_FLAG_RX_DATA_PEEK DEF_BIT_08 #define NET_TCP_FLAG_RX_BLOCK DEF_BIT_15 /*$PAGE*/ /* ********************************************************************************************************* * TCP TYPE DEFINES * * Note(s) : (1) NET_TCP_TYPE_&&& #define values specifically chosen as ASCII representations of the TCP * types. Memory displays of TCP types will display with their chosen ASCII names. ********************************************************************************************************* */ /* ------------------ NET TCP TYPES ------------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x20504354u /* "TCP " in ASCII. */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x43542050u /* "TCP " in ASCII. */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_TYPE_CONN 0x54435020u /* "TCP " in ASCII. */ #endif #endif /* ********************************************************************************************************* * TCP SEQUENCE NUMBER DEFINES * * Note(s) : (1) TCP initial transmit sequence number is incremented by a fixed value, preferably a large * prime value or a large value with multiple unique factors. * * (a) One reasonable TCP initial transmit sequence number increment value example : * * 65527 = 37 * 23 * 11 * 7 * * * #### NET_TCP_TX_SEQ_NBR_CTR_INC could be developer-configured in 'net_cfg.h'. * * See also 'NET_TCP_TX_GET_SEQ_NBR() Notes #1b2 & #1c2'. ********************************************************************************************************* */ #define NET_TCP_SEQ_NBR_NONE 0u #define NET_TCP_ACK_NBR_NONE NET_TCP_SEQ_NBR_NONE #define NET_TCP_TX_SEQ_NBR_CTR_INC 65527u /* See Note #1. */ #define NET_TCP_ACK_NBR_DUP_WIN_SIZE_SCALE 4 /*$PAGE*/ /* ********************************************************************************************************* * TCP DATA/TOTAL LENGTH DEFINES * * Note(s) : (1) (a) TCP total length #define's (NET_TCP_TOT_LEN) relate to the total size of a complete * TCP packet, including the packet's TCP header. Note that a complete TCP packet MAY * be fragmented in multiple Internet Protocol packets. * * (b) TCP data length #define's (NET_TCP_DATA_LEN) relate to the data size of a complete * TCP packet, equal to the total TCP packet length minus its TCP header size. Note * that a complete TCP packet MAY be fragmented in multiple Internet Protocol packets. ********************************************************************************************************* */ /* See Notes #1a & #1b. */ #define NET_TCP_DATA_LEN_MIN 0u #define NET_TCP_TOT_LEN_MIN (NET_TCP_HDR_SIZE_MIN + NET_TCP_DATA_LEN_MIN) #define NET_TCP_TOT_LEN_MAX (NET_IP_TOT_LEN_MAX - NET_IP_HDR_SIZE_MIN ) #define NET_TCP_DATA_LEN_MAX (NET_TCP_TOT_LEN_MAX - NET_TCP_HDR_SIZE_MIN) /*$PAGE*/ /* ********************************************************************************************************* * TCP SEGMENT SIZE DEFINES * * Note(s) : (1) (a) RFC # 879, Section 3 states that the TCP Maximum Segment Size "counts only * data octets in the segment, ... not the TCP header or the IP header". * * (b) RFC #1122, Section 4.2.2.6 requires that : * * (1) "The MSS value to be sent in an MSS option must be less than or equal to * * (A) MMS_R - 20 * * where MMS_R is the maximum size for a transport-layer message that can * be received." * * (2) "If an MSS option is not received at connection setup, TCP MUST assume a * default send MSS of 536 (576 - 40)." * * See also 'net_ip.h IP DATA/TOTAL LENGTH DEFINES Note #1'. ********************************************************************************************************* */ /* See Note #1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT (NET_IP_MAX_DATAGRAM_SIZE_DFLT - NET_IP_HDR_SIZE_MIN - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_MAX_SEG_SIZE_DFLT_RX NET_TCP_DATA_LEN_MAX /* See Note #1b1. */ #define NET_TCP_MAX_SEG_SIZE_DFLT_TX NET_TCP_MAX_SEG_SIZE_DFLT /* See Note #1b2. */ #define NET_TCP_MAX_SEG_SIZE_NONE 0u #define NET_TCP_MAX_SEG_SIZE_MIN NET_TCP_MAX_SEG_SIZE_DFLT #define NET_TCP_MAX_SEG_SIZE_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_MIN NET_TCP_DATA_LEN_MIN #define NET_TCP_SEG_LEN_MAX NET_TCP_DATA_LEN_MAX #define NET_TCP_SEG_LEN_SYNC 1u #define NET_TCP_SEG_LEN_FIN 1u #define NET_TCP_SEG_LEN_CLOSE NET_TCP_SEG_LEN_FIN #define NET_TCP_SEG_LEN_ACK 0u #define NET_TCP_SEG_LEN_RESET 0u #define NET_TCP_SEG_LEN_PROBE 0u #define NET_TCP_DATA_LEN_TX_SYNC 0u #define NET_TCP_DATA_LEN_TX_FIN 0u #define NET_TCP_DATA_LEN_TX_CLOSE NET_TCP_DATA_LEN_TX_FIN #define NET_TCP_DATA_LEN_TX_ACK 0u #define NET_TCP_DATA_LEN_TX_PROBE_NO_DATA 0u #define NET_TCP_DATA_LEN_TX_PROBE_DATA 1u #define NET_TCP_DATA_LEN_TX_RESET 0u #define NET_TCP_TX_PROBE_DATA 0x00u /* ********************************************************************************************************* * TCP WINDOW SIZE DEFINES * * Note(s) : (1) Although NO RFC specifies the absolute minimum TCP connection window size value allowed, * RFC #793, Section 3.7 'Data Communication : Managing the Window' states that for "the * window ... there is an assumption that this is related to the currently available data * buffer space available for this connection". ********************************************************************************************************* */ #define NET_TCP_WIN_SIZE_NONE 0u #define NET_TCP_WIN_SIZE_MIN NET_TCP_MAX_SEG_SIZE_MIN #define NET_TCP_WIN_SIZE_MAX DEF_INT_16U_MAX_VAL /*$PAGE*/ /* ********************************************************************************************************* * TCP HEADER OPTIONS DEFINES * * Note(s) : (1) See the following RFC's for TCP options summary : * * (a) RFC # 793, Section 3.1 'Header Format : Options' * (b) RFC #1122; Sections 4.2.2.5, 4.2.2.6 * * (2) TCP option types are encoded in the first octet for each TCP option as follows : * * -------- * | TYPE | * -------- * * The TCP option type value determines the TCP option format : * * (a) The following TCP option types are single-octet TCP options -- i.e. the option type * octet is the ONLY octet for the TCP option. * * (1) TYPE = 0 End of Options List * (2) TYPE = 1 No Operation * * * (b) All other TCP options MUST be multi-octet TCP options (see RFC #1122, Section 4.2.2.5) : * * ------------------------------ * | TYPE | LEN | TCP OPT | * ------------------------------ * * where * TYPE Indicates the specific TCP option type * LEN Indicates the total TCP option length, in octets, including * the option type & the option length octets * TCP OPT Additional TCP option octets, if any, that contain the remaining * TCP option information * * The following TCP option types are multi-octet TCP options where the option's second * octet specify the total TCP option length, in octets, including the option type & the * option length octets : * * (1) TYPE = 2 Maximum Segment Size See RFC # 793, Section 3.1 'Header Format : * Options : Maximum Segment Size'; * RFC #1122, Section 4.2.2.6; * RFC # 879, Section 3 * * (2) TYPE = 3 Window Scale See 'net_tcp.h Note #1c1' * (3) TYPE = 4 SACK Allowed See 'net_tcp.h Note #1c2' * (4) TYPE = 5 SACK Option See 'net_tcp.h Note #1c2' * (5) TYPE = 6 Echo Request See 'net_tcp.h Note #1c3' * (6) TYPE = 7 Echo Reply See 'net_tcp.h Note #1c3' * (7) TYPE = 8 Timestamp See 'net_tcp.h Note #1c4' * * (3) TCP header allows for a maximum option list length of 40 octets : * * NET_TCP_HDR_OPT_SIZE_MAX = NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN * * = 60 - 20 * * = 40 * * (4) 'NET_TCP_OPT_SIZE' MUST be pre-defined PRIOR to all definitions that require TCP option * size data type. ********************************************************************************************************* */ /*$PAGE*/ #define NET_TCP_HDR_OPT_END_LIST 0u #define NET_TCP_HDR_OPT_NOP 1u #define NET_TCP_HDR_OPT_MAX_SEG_SIZE 2u #define NET_TCP_HDR_OPT_WIN_SCALE 3u #define NET_TCP_HDR_OPT_SACK_PERMIT 4u #define NET_TCP_HDR_OPT_SACK 5u #define NET_TCP_HDR_OPT_ECHO_REQ 6u #define NET_TCP_HDR_OPT_ECHO_REPLY 7u #define NET_TCP_HDR_OPT_TS 8u #define NET_TCP_HDR_OPT_PAD NET_TCP_HDR_OPT_END_LIST #define NET_TCP_HDR_OPT_LEN_END_LIST 1u #define NET_TCP_HDR_OPT_LEN_NOP 1u #define NET_TCP_HDR_OPT_LEN_MAX_SEG_SIZE 4u #define NET_TCP_HDR_OPT_LEN_WIN_SCALE 3u #define NET_TCP_HDR_OPT_LEN_SACK_PERMIT 2u #define NET_TCP_HDR_OPT_LEN_ECHO_REQ 6u #define NET_TCP_HDR_OPT_LEN_ECHO_REPLY 6u #define NET_TCP_HDR_OPT_LEN_TS 10u #define NET_TCP_HDR_OPT_LEN_SACK_MIN 6u #define NET_TCP_HDR_OPT_LEN_SACK_MAX 38u #define NET_TCP_HDR_OPT_LEN_MIN 1u #define NET_TCP_HDR_OPT_LEN_MIN_LEN 2u #define NET_TCP_HDR_OPT_LEN_MAX 38u typedef CPU_INT32U NET_TCP_OPT_SIZE; /* TCP opt size data type (see Note #4). */ #define NET_TCP_HDR_OPT_SIZE_WORD (sizeof(NET_TCP_OPT_SIZE)) #define NET_TCP_HDR_OPT_SIZE_MAX (NET_TCP_HDR_SIZE_MAX - NET_TCP_HDR_SIZE_MIN) #define NET_TCP_HDR_OPT_NBR_MIN 0u #define NET_TCP_HDR_OPT_NBR_MAX (NET_TCP_HDR_OPT_SIZE_MAX / NET_TCP_HDR_OPT_SIZE_WORD) #define NET_TCP_HDR_OPT_IX NET_TCP_HDR_SIZE_MIN /*$PAGE*/ /* ********************************************************************************************************* * TCP OPTION CONFIGURATION TYPE DEFINES * * Note(s) : (1) NET_TCP_OPT_CFG_TYPE_&&& #define values specifically chosen as ASCII representations of * the TCP option configuration types. Memory displays of TCP option configuration buffers * will display the TCP option configuration TYPEs with their chosen ASCII names. ********************************************************************************************************* */ /* ---------------- TCP OPT CFG TYPES ----------------- */ #if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else #if (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_32) #define NET_TCP_OPT_CFG_TYPE_NONE 0x454E4F4Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x2053534Du /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x204E4957u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x504B4353u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x4B434153u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x51455245u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4F484345u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x20205354u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #elif (CPU_CFG_DATA_SIZE == CPU_WORD_SIZE_16) #define NET_TCP_OPT_CFG_TYPE_NONE 0x4F4E454Eu /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x534D2053u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x4957204Eu /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x4353504Bu /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x41534B43u /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x52455145u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x43454F48u /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x53542020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #else /* Dflt CPU_WORD_SIZE_08. */ #define NET_TCP_OPT_CFG_TYPE_NONE 0x4E4F4E45u /* "NONE" in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_MAX_SEG_SIZE 0x4D535320u /* "MSS " in ASCII. */ #define NET_TCP_OPT_CFG_TYPE_WIN_SCALE 0x57494E20u /* "WIN " in ASCII (see 'net_tcp.h Note #1c1'). */ #define NET_TCP_OPT_CFG_TYPE_SACK_PERMIT 0x53434B50u /* "SCKP" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_SACK 0x5341434Bu /* "SACK" in ASCII (see 'net_tcp.h Note #1c2'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REQ 0x45524551u /* "EREQ" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_ECHO_REPLY 0x4543484Fu /* "ECHO" in ASCII (see 'net_tcp.h Note #1c3'). */ #define NET_TCP_OPT_CFG_TYPE_TS 0x54532020u /* "TS " in ASCII (see 'net_tcp.h Note #1c4'). */ #endif #endif /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION TIMEOUT DEFINES * * Note(s) : (1) (a) (1) RFC #1122, Section 4.2.2.13 'DISCUSSION' states that "the graceful close algorithm * of TCP requires that the connection state remain defined on (at least) one end of * the connection, for a timeout period of 2xMSL ... During this period, the (remote * socket, local socket) pair that defines the connection is busy and cannot be reused". * * (2) The following sections reiterate that the TIME-WAIT state timeout scalar is two * maximum segment lifetimes (2 MSL) : * * (A) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check Sequence Number : TIME-WAIT STATE' * (B) RFC #793, Section 3.9 'Event Processing : SEGMENT ARRIVES : * Check FIN Bit : TIME-WAIT STATE' * * (b) (1) RFC #793, Section 3.3 'Sequence Numbers : Knowing When to Keep Quiet' states that * "the Maximum Segment Lifetime (MSL) is ... to be 2 minutes. This is an engineering * choice, and may be changed if experience indicates it is desirable to do so". * * (2) Microsoft Corporation's Windows XP defaults MSL to 15 seconds. ********************************************************************************************************* */ /* Max seg timeout (see Note #1b) : */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MIN_SEC ( 0u ) /* ... min = 0 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_MAX_SEC ( 2u * DEF_TIME_NBR_SEC_PER_MIN) /* ... max = 2 minutes */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_DFLT_SEC ( 15u ) /* ... dflt = 15 seconds */ #define NET_TCP_CONN_TIMEOUT_MAX_SEG_SCALAR 2u /* ... scalar (see Note #1a). */ #define NET_TCP_CONN_TIMEOUT_CONN_DFLT_SEC (120u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt conn timeout = 120 minutes */ #define NET_TCP_CONN_TIMEOUT_USER_DFLT_SEC ( 30u * DEF_TIME_NBR_SEC_PER_MIN) /* Dflt user timeout = 30 minutes */ /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION STATES * * Note(s) : (1) See the following RFC's for TCP state machine summary : * * (a) RFC # 793; Sections 3.2, 3.4, 3.5, 3.9 * (b) RFC #1122; Sections 4.2.2.8, 4.2.2.10, 4.2.2.11, 4.2.2.13, 4.2.2.18, 4.2.2.20 * * (2) (a) #### Additional closing-data-available state used for closing connections to allow the * application layer to receive any remaining data. * * See also 'net_tcp.c NetTCP_RxPktConnHandlerFinWait1() Note #2f5A2', * 'net_tcp.c NetTCP_RxPktConnHandlerFinWait2() Note #2f5B', * 'net_tcp.c NetTCP_RxPktConnHandlerClosing() Note #2d2B2a1B', * & 'net_tcp.c NetTCP_RxPktConnHandlerLastAck() Note #2d2A1b'. ********************************************************************************************************* */ #define NET_TCP_CONN_STATE_NONE 0u #define NET_TCP_CONN_STATE_FREE 1u #define NET_TCP_CONN_STATE_CLOSED 10u #define NET_TCP_CONN_STATE_LISTEN 20u #define NET_TCP_CONN_STATE_SYNC_RXD 30u #define NET_TCP_CONN_STATE_SYNC_RXD_PASSIVE 31u #define NET_TCP_CONN_STATE_SYNC_RXD_ACTIVE 32u #define NET_TCP_CONN_STATE_SYNC_TXD 35u #define NET_TCP_CONN_STATE_CONN 40u #define NET_TCP_CONN_STATE_FIN_WAIT_1 50u #define NET_TCP_CONN_STATE_FIN_WAIT_2 51u #define NET_TCP_CONN_STATE_CLOSING 52u #define NET_TCP_CONN_STATE_TIME_WAIT 53u #define NET_TCP_CONN_STATE_CLOSE_WAIT 55u #define NET_TCP_CONN_STATE_LAST_ACK 56u #define NET_TCP_CONN_STATE_CLOSING_DATA_AVAIL 59u /* See Note #2a. */ /* ********************************************************************************************************* * TCP CONNECTION QUEUE STATES ********************************************************************************************************* */ #define NET_TCP_RX_Q_STATE_NONE 0u #define NET_TCP_RX_Q_STATE_CLOSED 100u #define NET_TCP_RX_Q_STATE_CLOSING 101u #define NET_TCP_RX_Q_STATE_SYNC 110u #define NET_TCP_RX_Q_STATE_CONN 111u #define NET_TCP_TX_Q_STATE_NONE 0u #define NET_TCP_TX_Q_STATE_CLOSED 200u #define NET_TCP_TX_Q_STATE_CLOSING 201u #define NET_TCP_TX_Q_STATE_SYNC 210u #define NET_TCP_TX_Q_STATE_CONN 211u #define NET_TCP_TX_Q_STATE_SUSPEND 215u #define NET_TCP_TX_Q_STATE_CLOSED_SUSPEND 220u #define NET_TCP_TX_Q_STATE_CLOSING_SUSPEND 221u /*$PAGE*/ /* ********************************************************************************************************* * TCP CONNECTION CODE DEFINES **************
上傳時(shí)間： 2015-11-22
上傳用戶：the same kong
這是華為內(nèi)部的優(yōu)秀C項(xiàng)目，供大家學(xué)習(xí)參考。 body {background: #383838 !important;}::-webkit-scrollbar{height:10px !important; width:10px !important; overflow:visible !important;}::-webkit-scrollbar-button{height:0 !important; width:0 !important; display:none !important;}::-webkit-scrollbar-track{box-shadow:none !important;}::-webkit-scrollbar-track:hover{background-color:rgba(56, 56, 56, 0.03) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-track:active{background-color:rgba(56, 56, 56, 0.04) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.14), inset -1px -1px 0 rgba(56, 56, 56, 0.14) !important;}::-webkit-scrollbar-thumb{background-clip:padding-box !important; background-color:rgba(56, 56, 56, 0.2) !important;}::-webkit-scrollbar-thumb:vertical{min-height:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:horizontal{min-width:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:hover{background-color:rgba(56, 56, 56, 0.6) !important; box-shadow:inset 1px 1px 1px rgba(56, 56, 56, 0.25), inset -1px -1px 1px rgba(56, 56, 56, 0.25) !important;}::-webkit-scrollbar-thumb:active{background-color:rgba(56, 56, 56, 0.7) !important; box-shadow:inset 1px 1px 3px rgba(56, 56, 56, 0.35), inset -1px -1px 3px rgba(56, 56, 56, 0.35) !important;}::-webkit-scrollbar-corner{background:trnasparent !important;}html::-webkit-scrollbar,body::-webkit-scrollbar{background: rgba(56, 56, 56, 0.5) !important;}body * {background-color: rgba(56, 56, 56, 0.44) !important;}* {color: #B6AA7B !important;}a:link,a:link *,a:link:hover,a:link:hover *,a:link:active,a:link:active * {color: #B6AA7B !important;}a:visited,a:visited *,a:visited:hover,a:visited:hover *,a:visited:active,a:visited:active * {color: #D9C077 !important;}#_maxthon_night_mode_mask{position:fixed !important; left:0 !important; right:0 !important; top:0 !important; bottom:0 !important;z-index:100 !important; opacity:0.22 !important; background:#383838 !important; pointer-events:none !important;}
標(biāo)簽： C 代碼
上傳時(shí)間： 2015-12-13
上傳用戶：qq253363112
C語(yǔ)言接口與實(shí)現(xiàn)，一本過(guò)于學(xué)術(shù)的書(shū) body {background: #383838 !important;}::-webkit-scrollbar{height:10px !important; width:10px !important; overflow:visible !important;}::-webkit-scrollbar-button{height:0 !important; width:0 !important; display:none !important;}::-webkit-scrollbar-track{box-shadow:none !important;}::-webkit-scrollbar-track:hover{background-color:rgba(56, 56, 56, 0.03) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-track:active{background-color:rgba(56, 56, 56, 0.04) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.14), inset -1px -1px 0 rgba(56, 56, 56, 0.14) !important;}::-webkit-scrollbar-thumb{background-clip:padding-box !important; background-color:rgba(56, 56, 56, 0.2) !important;}::-webkit-scrollbar-thumb:vertical{min-height:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:horizontal{min-width:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:hover{background-color:rgba(56, 56, 56, 0.6) !important; box-shadow:inset 1px 1px 1px rgba(56, 56, 56, 0.25), inset -1px -1px 1px rgba(56, 56, 56, 0.25) !important;}::-webkit-scrollbar-thumb:active{background-color:rgba(56, 56, 56, 0.7) !important; box-shadow:inset 1px 1px 3px rgba(56, 56, 56, 0.35), inset -1px -1px 3px rgba(56, 56, 56, 0.35) !important;}::-webkit-scrollbar-corner{background:trnasparent !important;}html::-webkit-scrollbar,body::-webkit-scrollbar{background: rgba(56, 56, 56, 0.5) !important;}body * {background-color: rgba(56, 56, 56, 0.44) !important;}* {color: #B6AA7B !important;}a:link,a:link *,a:link:hover,a:link:hover *,a:link:active,a:link:active * {color: #B6AA7B !important;}a:visited,a:visited *,a:visited:hover,a:visited:hover *,a:visited:active,a:visited:active * {color: #D9C077 !important;}#_maxthon_night_mode_mask{position:fixed !important; left:0 !important; right:0 !important; top:0 !important; bottom:0 !important;z-index:100 !important; opacity:0.22 !important; background:#383838 !important; pointer-events:none !important;}
標(biāo)簽： c語(yǔ)言 接口與實(shí)現(xiàn)
上傳時(shí)間： 2015-12-13
上傳用戶：qq253363112
頻道 勁爆，看《歡樂(lè)頌》第二季 上傳 書(shū)房 登錄 注冊(cè) 菜單 收藏到書(shū)房下載文檔 上一頁(yè) /386 下一頁(yè) 全屏 < 返回首頁(yè) CNC初級(jí)教程/FANUC學(xué)校講義 頂 8 踩 0 瀏覽 1,196 收藏 89 評(píng)論 1 加入豆單 舉報(bào) 手機(jī)觀看
上傳時(shí)間： 2016-05-16
上傳用戶：kim123
批處理感知器算法的代碼matlab w1=[1,0.1,1.1;1,6.8,7.1;1,-3.5,-4.1;1,2.0,2.7;1,4.1,2.8;1,3.1,5.0;1,-0.8,-1.3; 1,0.9,1.2;1,5.0,6.4;1,3.9,4.0]; w2=[1,7.1,4.2;1,-1.4,-4.3;1,4.5,0.0;1,6.3,1.6;1,4.2,1.9;1,1.4,-3.2;1,2.4,-4.0; 1,2.5,-6.1;1,8.4,3.7;1,4.1,-2.2]; w3=[1,-3.0,-2.9;1,0.5,8.7;1,2.9,2.1;1,-0.1,5.2;1,-4.0,2.2;1,-1.3,3.7;1,-3.4,6.2; 1,-4.1,3.4;1,-5.1,1.6;1,1.9,5.1]; figure; plot(w3(:,2),w3(:,3),'ro'); hold on; plot(w2(:,2),w2(:,3),'b+'); W=[w2;-w3];%增廣樣本規(guī)范化 a=[0,0,0]; k=0;%記錄步數(shù) n=1; y=zeros(size(W,2),1);%記錄錯(cuò)分的樣本 while any(y<=0) k=k+1; y=a*transpose(W);%記錄錯(cuò)分的樣本 a=a+sum(W(find(y<=0),:));%更新a if k >= 250 break end end if k<250 disp(['a為：',num2str(a)]) disp(['k為：',num2str(k)]) else disp(['在250步以內(nèi)沒(méi)有收斂，終止']) end %判決面：x2=-a2*x1/a3-a1/a3 xmin=min(min(w1(:,2)),min(w2(:,2))); xmax=max(max(w1(:,2)),max(w2(:,2))); x=xmin-1:xmax+1;%(xmax-xmin): y=-a(2)*x/a(3)-a(1)/a(3); plot(x,y)
上傳時(shí)間： 2016-11-07
上傳用戶：a1241314660
Maven的安裝及MyEclipse中配置Maven
上傳時(shí)間： 2017-02-28
上傳用戶：iverson4988
photoshop軟件（本例中使用CS5版本，當(dāng)然各版本界面都大同小異） 界面篇 1 首先我們打開(kāi)photoshop軟件，界面就如下圖所示了： 2 左側(cè)的是工具箱調(diào)板，我們可以用鼠標(biāo)單擊相應(yīng)的工具進(jìn)行圖片處理操作，鼠標(biāo)右擊可以進(jìn)行某一工具選擇（再使用熟練后，我們也可以按下相應(yīng)的鍵盤(pán)鍵進(jìn)行選擇），如圖： 3 右側(cè)的是窗口調(diào)板，我們可以點(diǎn)擊菜單中的窗口菜單，在下拉列表中選擇我們需要的窗口調(diào)板，如圖： 4 頂部的菜單欄中包含了全部photoshop常用的操作，我們不必去死記硬背，只要平時(shí)常用就會(huì)爛熟于心了。 5 在菜單欄的下方是屬性欄，顯示當(dāng)前我們正在使用的工具的屬性，如圖： END 常用操作 1 打開(kāi)一張圖片，方法有三種：①使用菜單里面的打開(kāi)命令；②使用快捷鍵Ctrl+O；③雙擊photoshop界面中心；④拖動(dòng)想要處理的圖片到photoshop中打開(kāi)；⑤右鍵選擇要處理的圖片選擇使用photoshop打開(kāi)命令。 2 保存圖片的方法：一般按下鍵盤(pán)上的快捷鍵Ctrl+S，或使用菜單保存命令（如果要另存的話就選擇另存為選項(xiàng)；保存的圖片可以選擇任意格式，.psd是保存當(dāng)前處理的所有步驟，下次打開(kāi)還可以繼續(xù)編輯，JPEG、png、gif格式就是處理好的圖片格式） 3 歷史記錄面板的用法：我們處理圖片的時(shí)候可能要反復(fù)修改獲得最佳的效果，那么歷史記錄工具就可以很方便的返回之前我們的操作狀態(tài)，如圖，點(diǎn)擊要恢復(fù)的步驟，即可恢復(fù)圖片： END 使用技巧 如圖所示黑色是前景色、白色是背景色，我們可以按下鍵盤(pán)上的X鍵進(jìn)行前景色和背景色的互換： 圖片移動(dòng)操作，我們打開(kāi)兩張圖片，想要移動(dòng)其中的一張到另一張中，我們可以按住鍵盤(pán)的Ctrl鍵，使用鼠標(biāo)拖動(dòng)一張圖片到另一張圖片中，如圖： 3 我們可以在處理圖片的時(shí)候按下Z鍵使用放大鏡放大圖片的細(xì)節(jié)，處理圖片的時(shí)候就會(huì)容易許多，我們可以按ATL鍵在放大和縮小之間切換！ 4 我們可以按住鍵盤(pán)上的空格鍵，移動(dòng)圖片，對(duì)于處理大型的圖片還是非常方便的！ END 注意事項(xiàng) photoshop入門(mén)相對(duì)來(lái)說(shuō)比較簡(jiǎn)單，但熟練操作至少要3個(gè)月左右！ 精通photoshop是一條非常漫長(zhǎng)的路程，有時(shí)候會(huì)打退堂鼓，但只要多操作，多制作，慢慢的時(shí)間久了也就精了。
上傳時(shí)間： 2017-12-07
上傳用戶：1506034115
photoshop軟件（本例中使用CS5版本，當(dāng)然各版本界面都大同小異） 界面篇 1 首先我們打開(kāi)photoshop軟件，界面就如下圖所示了： 2 左側(cè)的是工具箱調(diào)板，我們可以用鼠標(biāo)單擊相應(yīng)的工具進(jìn)行圖片處理操作，鼠標(biāo)右擊可以進(jìn)行某一工具選擇（再使用熟練后，我們也可以按下相應(yīng)的鍵盤(pán)鍵進(jìn)行選擇），如圖： 3 右側(cè)的是窗口調(diào)板，我們可以點(diǎn)擊菜單中的窗口菜單，在下拉列表中選擇我們需要的窗口調(diào)板，如圖： 4 頂部的菜單欄中包含了全部photoshop常用的操作，我們不必去死記硬背，只要平時(shí)常用就會(huì)爛熟于心了。 5 在菜單欄的下方是屬性欄，顯示當(dāng)前我們正在使用的工具的屬性，如圖： END 常用操作 1 打開(kāi)一張圖片，方法有三種：①使用菜單里面的打開(kāi)命令；②使用快捷鍵Ctrl+O；③雙擊photoshop界面中心；④拖動(dòng)想要處理的圖片到photoshop中打開(kāi)；⑤右鍵選擇要處理的圖片選擇使用photoshop打開(kāi)命令。 2 保存圖片的方法：一般按下鍵盤(pán)上的快捷鍵Ctrl+S，或使用菜單保存命令（如果要另存的話就選擇另存為選項(xiàng)；保存的圖片可以選擇任意格式，.psd是保存當(dāng)前處理的所有步驟，下次打開(kāi)還可以繼續(xù)編輯，JPEG、png、gif格式就是處理好的圖片格式） 3 歷史記錄面板的用法：我們處理圖片的時(shí)候可能要反復(fù)修改獲得最佳的效果，那么歷史記錄工具就可以很方便的返回之前我們的操作狀態(tài)，如圖，點(diǎn)擊要恢復(fù)的步驟，即可恢復(fù)圖片： END 使用技巧 如圖所示黑色是前景色、白色是背景色，我們可以按下鍵盤(pán)上的X鍵進(jìn)行前景色和背景色的互換： 圖片移動(dòng)操作，我們打開(kāi)兩張圖片，想要移動(dòng)其中的一張到另一張中，我們可以按住鍵盤(pán)的Ctrl鍵，使用鼠標(biāo)拖動(dòng)一張圖片到另一張圖片中，如圖： 3 我們可以在處理圖片的時(shí)候按下Z鍵使用放大鏡放大圖片的細(xì)節(jié)，處理圖片的時(shí)候就會(huì)容易許多，我們可以按ATL鍵在放大和縮小之間切換！ 4 我們可以按住鍵盤(pán)上的空格鍵，移動(dòng)圖片，對(duì)于處理大型的圖片還是非常方便的！ END 注意事項(xiàng) photoshop入門(mén)相對(duì)來(lái)說(shuō)比較簡(jiǎn)單，但熟練操作至少要3個(gè)月左右！ 精通photoshop是一條非常漫長(zhǎng)的路程，有時(shí)候會(huì)打退堂鼓，但只要多操作，多制作，慢慢的時(shí)間久了也就精了。
上傳時(shí)間： 2017-12-07
上傳用戶：1506034115
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