Î÷ÃÅ×ÓͨÓÃ±äÆµÆ÷ÖлùÓÚDSPµÄÊý×Ö¿ØÖÆÆ÷ʵÏÖ
Ðû²¼ÈÕÆÚ£º
2022-03-23

±äƵµ÷ËÙϵͳµÄÒªº¦£¬¾ÍÊÇҪû¼ÆÒ»¸öºÏÀíµÄ±äƵÆ÷£¬¶øËüµÄ½¹µã¾ÍÊÇ±äÆµµ÷ËÙϵͳµÄÊý×Ö¿ØÖÆÆ÷¡£±äƵÆ÷µÄÊý×Ö¿ØÖÆÆ÷°üÀ¨Ðźŵļì²â¡¢Â˲¨¡¢ÕûÐΣ¬½¹µãËã·¨µÄʵʱÍê³ÉÒÔ¼°Çý¶¯Ðźŵı¬·¢£¬ÏµÍ³µÄ¼à¿Ø¡¢± £»¤µÈ¹¦Ð§¡£

1¡¢ Êý×Ö¿ØÖÆÆ÷µÄÓ²¼þ½á¹¹¿òͼºÍÊÂÇéÔ­Àí

Êý×Ö¿ØÖÆÆ÷µÄÓ²¼þÒÔTMS320F240¶¨µãDSPΪCPU£¬CY7C199ΪÍⲿÊý¾ÝºÍ³ÌÐò´æ´¢Æ÷£¬Êý¾ÝºÍ³ÌÐò´æ´¢Æ÷¸÷32K £»16·µÄÄ£Äâ/Êý×ÖÊäÈëͨµÀ£¬ÆäÖÐÒ»Æð¿ÉÒÔÓÃÀ´¾ÙÐÐÄ£ÄâÆµÂʸø¶¨ £»Ê¹ÓÃÁË8λÊý×ÖI/O¿Ú£¬¿ÉÒÔÓüüÅÌͨ¹ýI/O¿ÚÀ´¾ÙÐÐÊý×ÖÆµÂʸø¶¨ £»4·12λµÄÊý×Ö/Ä£Äâת»»Í¨µÀ£¬ÓÃÓÚµç»úÊä³öÐźſØÖÆ £»RS232ºÍSPIϵÁмæÈݽӿÚ£¬ÆäÖн«SPIÓÃ×÷±äƵµ÷ËÙʱµç»úƵÂʵÄLEDÏÔʾ£¬½«SCI¿ÚÀ©³ä³ÉRS232½Ó¿Ú¡£

µç»ú»òÕßÄæ±äÆ÷µÄÊÂÇ鯵ÂÊͨ¹ý¼üÅ̸ø¶¨£¬Í¬Ê±£¬ÆäƵÂÊÏÔʾͨ¹ýDSPÄÚ²¿µÄÏÔʾ³ÌÐò»ØÏÔÔÚLEDÉÏ£¬µ±°´ÏÂÔËÐмüÒԺ󣬼üÅÌÉè¼ÆÆµÂʱ»Ë͵½±¬·¢¿Õ¼äµçѹʸÁ¿µÄSVPWM´¦Öóͷ£×Ó³ÌÐò£¬ÌìÉúµÄSVPWM²¨ÐÎͨ¹ýGALÆ÷¼þ± £»¤ºóÊä³ö£¬Óë´Ëͬʱ£¬µçÄîÍ·»òÕ߱䯵Æ÷µÄʵʱÔËÐж¯Ì¬ÆµÂÊͨ¹ýLEDÏÔʾ¡£Õý½»±àÂëÂö³å¿ÉÒÔ½ÓÈëµç»úµÄ¹âµç±àÂëÆ÷£¬¶Ôϵͳ×é³ÉËÙÂÊ»··´Ï죬A/DÄ£¿é¿ÉÒÔ½ÓÈëµç»úµÄµçÁ÷»·£¬ÖÁÓÚ±äÆµµ÷ËÙϵͳµÄ± £»¤ÖÐÖ¹Ô´ÓÉDSPµÄÒý½ÅPDPINTÌṩ£¬Ö÷ÒªÊǹýѹ¡¢¹ýÁ÷¡¢¿ØÖƵçѹǷѹ¡¢¹ýÈȵÈÖÐÖ¹Ô´¡£µç»úµÄËÙÂÊ»òÕßÄæ±äÆ÷µÄÊä³öƵÂÊ¿ÉÒÔͨ¹ý¼üÅ̸ıä¡£

2¡¢ Ó²¼þÉè¼Æ

Êý×ÖÐźŴ¦Öóͷ£Æ÷ÊÇÊý×Ö¿ØÖÆÆ÷µÄ½¹µã²¿·Ö£¬Ò²ÊÇÊý×Ö¿ØÖÆÆ÷¶ÔÐźŵļì²â¡¢Â˲¨¡¢ÕûÐΣ¬½¹µãËã·¨µÄʵʱÍê³ÉÒÔ¼°Çý¶¯Ðźŵı¬·¢£¬ÏµÍ³µÄ¼à¿Ø¡¢± £»¤µÈ¹¦Ð§µÄ½¹µã²¿·Ö¡£Êý×Ö¿ØÖÆÆ÷µÄ¹¦Ð§Ä£¿éÉè¼ÆÈçÏ¡£

2.1 Êý¾ÝºÍ³ÌÐò´æ´¢Æ÷µÄÉè¼Æ

DSPÊÇÒ»ÖÖ¸ßËÙ´æÈ¡Æ÷¼þ£¬¹ØÓÚÍâΧ½Ó¿ÚоƬÓнϸߵÄÒªÇó£¬ËäÈ»DSP×Ô¼º¿ÉÒÔÈí¼þÌṩ0~7¸öÆÚ´ý״̬À´Öª×ãÓëÆ¬Íâ´æÈ¡Æ÷¼þËÙÂÊµÄÆ¥Å䣬¿ÉÊÇΪÁ˲»ÖÁÓÚÓ°ÏìÕû¸öϵͳµÄ¿ØÖƺͷÂÕæ¹¦Ð§£¬Ò»Ñùƽ³£½ÓÄÉ´æÈ¡ËÙÂʽÏÁ¿¸ßµÄ´æ´¢Æ÷À´×öΪDSPµÄƬÍâÊý¾ÝºÍ³ÌÐò´æ´¢Æ÷¡£±¾ÎĽÓÄÉCY7C199´æ´¢Æ÷£¬´æÈ¡Ê±¼ä15ns£¬ÍêÈ«²»±ØÌṩÈí¼þÆÚ´ý״̬Ҳ²»±Ø¼ÓÓ²¼þÆÚ´ýµç·£¬ÓÉÓÚ£¬CY7C199ÊÇ32KµÄ8λ´æ´¢Æ÷£¬ÒÔÊÇ£¬Ê¹ÓÃÁË4Ƭ¸Ã´æ´¢Æ÷×é³ÉÁË32KµÄ16λ´æ´¢Æ÷RAM£¬Êý¾ÝºÍ³ÌÐò¸÷32K¡£

2.2 DSP¸´Î»ÊµÊ±Öӵ緵ÄÉè¼Æ

ΪÁËʹϵͳ±»¸´Î»ÐźÅ׼ȷµØ³õʼ»¯£¬¶Ô¸´Î»ÐźŵÄÂö³å¿í¶È±ØÐèÓÐÒ»¶¨µÄÒªÇó¡£¹ØÓÚTMS320F240¶øÑÔ£¬¸´Î»ÐźÅÖÁÉÙÒªlms¡£²»¹ýÉϵçÖ®ºó£¬ÏµÍ³µÄÕñµ´Æ÷µÖ´ïÎȹÌÊÂÇé״̬ÐèÒª20msÉõÖÁ¸ü³¤µÄʱ¼ä£¬Ò»Ñùƽ³£À´ËµÉϵ縴λʱ£¬ÔÚ¸´Î»Òý½ÅÉÏÖÃ100~200msµÄÒ»¸öµÍµçƽÂö³åÊǽÏÁ¿ºÏÊʵÄ¡£Æ¾Ö¤ÕâÒ»Ô­Ôò£¬½ÓÄÉMAXIM¹«Ë¾µÄ¼¯³É΢´¦Öóͷ£Æ÷¼à¿Ø¸´Î»µç·À´Íê³É£¬±¾ÎÄʹÓÃÁËMAX705¡£MAX705¼à¿ØÐ¾Æ¬£¬Óë¹Å°åµÄ·ÖÁ¢ÔªÆ÷¼þ×é³ÉµÄ΢»ú¼à¿Øµç·½ÏÁ¿£¬ËüµÄ¿É¿¿ÐԸߡ¢¶¯Ì¬ÏìÓ¦ºÃ£¬¹¦ºÄС¡¢Éè¼Æ¼òÆÓ¡¢Ìå»ýС£¬ÔÚµç×Ó²úÆ·Éè¼ÆÖÐÒÑ»ñµÃÆÕ±éµÄÓ¦Óá£

ÔÚÉè¼ÆÖУ¬Ê±ÖÓÍùÍù²»±»È˳ä·ÖµØÖØÊÓ£¬×Åʵ£¬Ê±ÖÓÊǵç·Éè¼ÆÖкÜÊÇÖ÷ÒªµÄÒ»¸ö»·½Ú¡£DSPʱÖӼȿÉÓÉÍⲿÌṩ£¬Òà¿ÉÓɰåÉϵÄÕñµ´Æ÷À´Ìṩ¡£ÓÉÓÚDSP¼°ÆäËüоƬÊÂÇé¶¼ÊÇÒÔʱÖÓΪ»ù×¼µÄ£¬ÈôÊÇʱÖÓÖÊÁ¿²»¸ß£¬ÄÇôϵͳµÄ¿É¿¿ÐÔ¡¢ÎȹÌÐԾͺÜÄѰü¹Ü¡£±¾ÎĽÓÄÉÍⲿʱÖÓÊäÈ룬ÓÉÓÐÔ´¾§Õñ±¬·¢10MHzÂö³å£¬Í¨¹ý¸²Í­ºÍ´®½ÓLCÂ˲¨µç·À´ÒÖÖÆÍâ½ç×ÌÈÅ£¬°ü¹ÜÁËϵͳµÄÎȹÌÊÂÇé¡£

......

¸ü¶àÄÚÈݽӴýÓëÎÒÃǽ»Á÷¡£

ÉùÃ÷£º²¿·ÖÄÚÈÝȪԴÓÚÍøÂ磬ÈçÇÖȨÇëºǫ́ÁôÑÔÁªÏµÉ¾³ý¡£