µÚ4Õ Ӳ¼þµç·Éè¼Æ
4.1 ×îСϵͳµç·Éè¼Æ
×îСϵͳÖ÷ÒªÓÐÕ𵴵緡¢¸´Î»µç·¡¢µ¥Æ¬»úºÍµçÔ´¹¹³É¡£ÆäÖÐÕðµ´µç·ʹÓÃ11.0592MHzµÄ¾§ÕñÅäºÏÁ½¸ö22pµÄгÕñµçÈݹ¹³É£¬Îªµ¥Æ¬»úÌṩ±ØÒªµÄϵͳʱÖÓ¡£¸´Î»µç·¼´¿ÉʵÏÖÉϵ縴룬Ҳ¿ÉʵÏÖÈ˹¤ÊÖ¶¯¸´Î»¡£µ±¸Õ¿ªÊ¼´ò¿ªµçԴʱ£¬µçÈÝC1Ï൱Óڶ̷£¬µ¥Æ¬»úRST½Å¶Ìʱ¼äÄÚ´¦Óڸߵçƽ£¬´Ó¶øʹµ¥Æ¬»ú¸´Î»£»Í¬Ñù£¬µ±SW¼ü°´ÏÂʱ£¬RST12½ÅͬÑùΪ¸ßµçƽ£¬¿ÉÒÔʹµ¥Æ¬»úÕý³£¸´Î»¡£ÒÔÉÏÈý²¿·Öµç·¹¹³ÉÁËÒ»¸ö×îСµÄµ¥Æ¬»úϵͳ¡£ VCCC1AGND22PC322PX2P10P11P12P13P14P15P16P17P33P32P35P34VCC40123456781312151431X119X218RESET9BP37P36171620VCCP10/TP11/TP12P13P14P15P16P17INT1INT0T1T0EA/VPX1X2RESETRD'WR'GND1P00P01P02P03P04P05P06P07P20P21P22P23P24P25P26P27RXDTXDALE/P'PSEN3938373635343332212223242526272810113029P00P01P02P03P04P05P06P07P20P21P22P23P24P25P26P27P30P31ALE/P'PSENVCCP112345678910KR210KLCD12Y112MHzX1VCCVCC1C410URESETR310KGNDVCCR4330U2 C5ͼ4.1 ×îСϵͳµç· +12VGNDVCC4.2ÎÂʪ¶È¼ì²âµç·Éè¼Æ GND10492VREFVS4.2.1Êý×ÖÎÂʪ¶È´«¸ÐÆ÷DHT11¼ò½é 5DHT11 Êý×ÖÎÂʪ¶ÈP12 ´«¸ÐÆ÷ÊÇÒ»¿îº¬ÓÐÒÑУ׼Êý×ÖÐÅ ºÅÊä³öµÄÎÂʪ¶È¸´ºÏ´«Æ÷ ¡£ Ëü2IN110431N4007COUT1P1011ENABLEMB1Ó¦ÓÃרÓõÄÊý×ÖÄ£¿é²É¼¯¼¼ÊõºÍÎÂʪ¶È´«¸Ð¼¼Êõ £¬È·±£²úÆ·¾ßÓм«¸ß¿É¿¿ÐÔÓë׿ԽµÄ³¤1MotorOUT2D2P117C7IN2ÆÚÎȶ¨ÐÔ¡£´«¸ÐÆ÷°üÀ¨Ò»¸öµç ×è ʽ ¸Ð ʪԪ¼þºÍÒ» ¸ö NTC ²âÔª¼þ£¬²¢ÓëÒ»¸ö ¸ßÐÔÄÜ 8 GND8BOOT2GND10410λµ¥Æ¬»úÏà Á¬½Ó¡£Òò´Ë¸Ã²úÆ·¾ßÓÐÆ·ÖÊ׿Խ¡¢³¬¿ìÓ¦¡¢¿¹¸ÉÈÅÄÜÁ¦Ç¿¡¢ÐԼ۱ȼ«¸ßµÈÓÅ1N4007SENSES1µã¡£Ã¿¸ö DHT11 ´«¸ÐÆ÷¶¼ÔÚ¼«Îª¾«È·µÄ¶ÈУÑéÊÒÖнøÐÐУ׼¡£Ð£×¼ÏµÊýÒÔ³ÌÐòµÄÐÎʽ´¢P24´æÔÚ OTP ÄÚ´æÖУ¬´«¸ÐÆ÷ÄÚÔÚ¼ì²âÐźŵĴ¦Àí¹ý³ÌÖÐÒªµ÷ÓÃÕâЩУ׼ϵÊý¡£ µ¥ÏßÖÆ´®ÐÐS2µç»úÇý¶¯½Ó¿Ú£¬Ê¹ÏµÍ³ ¼¯±äµÃ¼òÒ׿ì½Ý¡£³¬Ð¡µÄÌå»ý¡¢¼«µÍµÄ¹¦ºÄ£¬ ÐźŴ«Êä¾àÀë¿É´ï 20 Ã×ÒÔP25GNDPower1VCCS33 Ϊ 4 Õëµ¥ÅÅÒý½Å×°¡£ÉÏ£¬ ʹ³ÉΪ¸÷ÀàÓ¦ÓÃÉõÖÁ×îΪ¿Á¿ÌµÄÓ¦Óó¡ºÏµÄ×î¼ÑÑ¡Ôò¡£²úÆ· Á¬P262+12V1S4½Ó·½±ã¡£ Header 3P27GND4.2.2 DHT11¹¤×÷ÔÀí DBOOT14U3L6203C6D1GND6GNDÓÉÓÚ²ÉÓÃDHTÊý×ÖÎÂʪ¶È´«¸ÐÆ÷£¬µç·²»Óÿ¼ÂÇA/Dת»»£¬Ö»ÐèÉè¼ÆÖ¸¶¨P1.4ÓëÊýµçÔ´½ÓÈë¿Ú°´¼üµç·×Ö´«¸ÐÆ÷ÏàÁ¬£¬µç·ÔÀíͼÈçͼ4.3¡£ 12GND 8
P20P21P22P00P01R8330U4111234567µ¥Æ¬»ú STC89C52LCD4GND1920P2GND4NC3DATA2VCC1DHT11C2VCC104R15KP14 AVCCVCCͼ4.2 DHT11Ó뵥Ƭ»úµÄÁ¬½Ó DHT11ÎÂʪ¶È´«¸ÐÆ÷ÐÔÄÜ˵Ã÷£º Ä£¿éÎÂʪ¶È´«¸ÐÆ÷VCCR676R7100K12BU1ALM339131KP33 GNDGNDVCCR101K5LM339DHT11µÄÊý¾Ý¶ÁÈ¡£º DATA ÓÃÓÚ΢´¦ÀíÆ÷ÓëDHT11Ö®¼äµÄͨѶºÍͬ²½£¬²ÉÓõ¥×ÜÏßÊý¾Ý¸ñʽ£¬Ò»´ÎͨѶʱ2P32¼ä4ms×óÓÒ£¬Êý¾Ý·ÖСÊý²¿·ÖºÍÕûÊý²¿·Ö£¬¾ßÌå¸ñʽÔÚÏÂÃæ˵Ã÷£¬µ±Ç°Ð¡Êý²¿·ÖÓÃÓÚÒÔºó4 3U1B±í4.1 DHT11ÎÂʪ¶È´«¸ÐÆ÷ÐÔÄÜ C129 GNDÀ©Õ¹£¬ÏÖ¶Á³öΪÁã¡£²Ù×÷Á÷³ÌÈçÏ£º
Ò»´ÎÍêÕûµÄÊý¾Ý´«ÊäΪ40bit,¸ßλÏȳö¡£
Êý¾Ý¸ñʽ£º8bitʪ¶ÈÕûÊýÊý¾Ý+8bitʪ¶ÈСÊýÊý¾Ý +8biζÈÕûÊýÊý¾Ý+8bitζÈСÊýÊý¾Ý +8bitУÑéºÍ¡£
Êý¾Ý´«ËÍÕýȷʱУÑéºÍÊý¾ÝµÈÓÚ\ʪ¶ÈÕûÊýÊý¾Ý+8bitʪ¶ÈСÊýÊý¾Ý+8biζÈÕûÊýÊý¾Ý+8bitζÈСÊýÊý¾Ý\ËùµÃ½á¹ûµÄÄ©8λ¡£
Óû§MCU·¢ËÍÒ»´Î¿ªÊ¼Ðźźó£¬DHT11´ÓµÍ¹¦ºÄģʽת»»µ½¸ßËÙģʽ£¬µÈ´ýÖ÷»ú¿ªÊ¼ÐźŽáÊøºó£¬DHT11·¢ËÍÏìÓ¦Ðźţ¬Ëͳö40bitµÄÊý¾Ý£¬²¢´¥·¢Ò»´ÎÐźŲɼ¯,Óû§¿ÉÑ¡Ôñ¶ÁÈ¡²¿·ÖÊý¾Ý¡£´ÓģʽÏ£¬DHT11½ÓÊÕµ½¿ªÊ¼ÐźŴ¥·¢Ò»´ÎÎÂʪ¶È²É¼¯£¬Èç¹ûûÓнÓÊÕµ½Ö÷»ú·¢ËÍ¿ªÊ¼Ðźţ¬DHT11²»»áÖ÷¶¯½øÐÐÎÂʪ¶È²É¼¯£¬²É¼¯Êý¾Ýºóת»»µ½µÍËÙģʽ¡£ ×ÜÏß¿ÕÏÐ״̬Ϊ¸ßµçƽ£¬Ö÷»ú°Ñ×ÜÏßÀµÍµÈ´ýDHT11ÏìÓ¦£¬Ö÷»ú°Ñ×ÜÏßÀµÍ±ØÐë´óÓÚ18ºÁÃ룬±£Ö¤DHT11Äܼì²âµ½ÆðʼÐźš£DHT11½ÓÊÕµ½Ö÷»úµÄ¿ªÊ¼Ðźź󣬵ȴýÖ÷»ú¿ªÊ¼ÐźŽáÊø,È»ºó·¢ËÍ80usµÍµçƽÏìÓ¦Ðźš£Ö÷»ú·¢ËÍ¿ªÊ¼ÐźŽáÊøºó£¬ÑÓʱµÈ´ý20-40usºó£¬¶ÁÈ¡DHT11µÄÏìÓ¦ÐźÅ,Ö÷»ú·¢ËÍ¿ªÊ¼Ðźź󣬿ÉÒÔÇл»µ½ÊäÈëģʽ£¬»òÕßÊä³ö¸ßµçƽ¾ù¿É£¬×ÜÏßÓÉÉÏÀµç×èÀ¸ß¡£
ͼ4.3 ×ÜÐźűíʾ·½·¨
×ÜÏßΪµÍµçƽ£¬ËµÃ÷DHT11·¢ËÍÏìÓ¦Ðźţ¬DHT11·¢ËÍÏìÓ¦Ðźźó£¬ÔÙ°Ñ×ÜÏßÀ¸ß80us£¬×¼±¸·¢ËÍÊý¾Ý£¬Ã¿Ò»bitÊý¾Ý¶¼ÒÔ50usµÍµçƽʱ϶¿ªÊ¼£¬¸ßµçƽµÄ³¤¶Ì¶¨ÁËÊý¾ÝλÊÇ0»¹ÊÇ1¡£¸ñʽ¼ûÏÂÃæͼʾ¡£Èç¹û¶ÁÈ¡ÏìÓ¦ÐźÅΪ¸ßµçƽ£¬ÔòDHT11ûÓÐÏìÓ¦£¬Çë¼ì²éÏß·ÊÇ·ñÁ¬½ÓÕý³£¡£µ±×îºóÒ»bitÊý¾Ý´«ËÍÍê±Ïºó£¬DHT11ÀµÍ×ÜÏß50us£¬Ëæºó×ÜÏßÓÉÉÏÀµç×èÀ¸ß½øÈë¿ÕÏÐ״̬¡£
ͼ4.4 Êý×Ö0Ðźűíʾ·½·¨
ͼ4.5 Êý×Ö1Ðźűíʾ·½·¨
10
4.3µç»úÇý¶¯µç·Éè¼Æ
L6203ÊÇרÓÃÇý¶¯¼¯³Éµç·£¬ÊôÓÚ HÇż¯³Éµç·£¬ÆäÊä³öµçÁ÷Ϊ2A£¬×î¸ßµçÁ÷5A£¬×î¸ß¹¤×÷µçѹ48V£¬×î¸ßƵÂÊ100KHZ£¬¿ÉÒÔÇý¶¯¸ÐÐÔ¸ºÔØ£¬Èç´ó¹¦ÂÊÖ±Á÷µç»ú£¬²½½øµç»ú£¬µç´Å·§µÈ£¬ÌرðÊÇÆäÊäÈë¶Ë¿ÉÒÔÓ뵥Ƭ»úÖ±½ÓÏàÁª£¬´Ó¶øºÜ·½±ãµØÊܵ¥Æ¬»ú¿ØÖÆ¡£µ±Çý¶¯Ö±Á÷µç»úʱ£¬¿ÉÒÔÖ±½Ó¿ØÖƲ½½øµç»ú£¬²¢¿ÉÒÔʵÏÖµç»úÕýתÓ뷴ת£¬ÊµÏִ˹¦ÄÜÖ»Ðè¸Ä±äÊäÈë¶ËµÄÂß¼µçƽ¡£ÎªÁ˱ÜÃâµç»ú¶Ôµ¥Æ¬»úµÄ¸ÉÈÅ£¬¿É¶ÔÄ£¿é¼ÓÈë¹âñ½øÐйâµç¸ôÀ룬´Ó¶øʹϵͳÄÜÎȶ¨¿É¿¿µÄ¹¤×÷¡£
ͼ4.6 L6203µÄ¹Ü½Åͼ
ͼ4.7 L6203µÄÄÚ²¿¿òͼ
ͼ4.8 µç»úÇý¶¯µÄÔÀíͼ
4.4 ÏÔʾµç·Éè¼Æ
ÏÔʾ²¿·Ö²ÉÓÃLCD12864×÷ΪÏÔʾÆ÷¼þ¡£LCD12864²ÉÓñê×¼µÄ20½Å£¨Óб³¹â´ø×ֿ⣩£¬¸÷Òý½Å½Ó¿Ú˵Ã÷Èç±í4-1Ëùʾ¡£
11