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Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2015/12/28 16:20
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Ãö©óÀW²v³]©wªº°ÝÃD¡A§Ú¨Ï¥ÎMCC : ³]©wSystem Module 1. Internal Oscillator³]©w¬O 20MHz ¬° Primary Oscillator Clock Source
2. PLL Enable 4MHz "5xDivider" PLL input 80MHz "20:1" Multiplier 80MHz "1:1" Divider
Peripheral Clock Divisor "DV_1"
80MHz SYSCLK 80MHz PBCLK
±q Easy Setup »P Registers ¸Ì±¬Ý³]©w³£¨S¦³°ÝÃD
TMR2 ¤¶±³]©w OC4 ¤¶±³]©w : Timer Clock : Compare Mode : Clock Source "PBCLK" Dual Compare Countinuous Pulse mode Input frequency "80MHz" Buffer Mode "16bit" Prescaler "1:1" Timerbase "TMR2"
Timer Period :
period count "0x64" Timer Period "1.25us"
¥H¤W³]©w¬O§Ú¨Ì¾Ú Datasheet ´£¨Ñªº¤º®e³]©w§Úªº»Ý¨D¡APWM°T¸¹¤]¨Ì¾Ú´£¨Ñªº¤½¦¡pºâ¹L¡C
°ÝÃD¬O¦b¥Üªi¾¹Åã¥ÜªºPeriod«o¬O 2.525us ¥ª¥k
§Ú¯à½T©w¤£¬O¥Üªi¾¹ªº°ÝÃD¡A¦]¬°¦b¥H¤W¬Û¦Pªº³]©w¤U¡G §Ú§âInternal Oscillator³]©w¬° 10MHz ®É¡A¿é¥Xperiod¥ç¬°¹w´Áªº1.25us¡Apºâªº PR2 ¤]¦p³]©w¤Wªº Period Count (0x32) ¬Ûµ¥¡C
¥u¬OÅÜ°Ê Internal Oscillator ¬°¦ó¿é¥Xperiod·|²£¥Í2¿ªº®t²§??
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2018/06/27 10:21
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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¥un§ó°ÊClock source (Primary Oscillator) ªº¼ÆÈ¡A¸g¹LMultiplier¡BDivider¡BPeripheral Clock Divisor ¿ÀW°£ÀW«á¡A§Y«KPBCLK ©M PR2 ¼ÆÈ¨S¦³§ó°Ê¡A¿é¥Xªº PWM Period ÁÙ¬O·|¦³ÅܤơC
¨Ò¦p : Clock Source = 20MHz , PBCLK = 80MHz , PR2 = 100(0x64) ; ¥Üªi¾¹¤W¬Ý¨ìªº¬O2.526us
Clock Source = 40MHz , PBCLK = 80MHz , PR2 = 100(0x64) ; ¥Üªi¾¹¤W¬Ý¨ìªº¬O5.049us
¨Ì¾Ú PIC32RefManual-Dec2013 ¸ê®Æ´£¨ÑªºPWMpºâ¤½¦¡¡A²z½×µ²ªG³£¨S¦³°ÝÃD¡A¦ý¬O¹ê»ÚÅã¥Ü¦b¥Üªi¾¹¤W¦³°ÝÃD¡C
½Ð°Ý¬Oþ¸Ì¥X°ÝÃD©Î¬O§Ú·d¿ù¤F¤å¥óªº·N«ä¶Ü?
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2018/07/16 16:40
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2007/06/05 21:45
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¨Sªþ¹Ï¤]¨S¬Ý¨ì¯u¹ê(¹êÅç)ªºª¬ªp...
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§â¨ä¥L¤£Åܳ£¥h°£«á,¥u³Ñ¥|ӼƦr 20MHz, 2.526us 40MHz, 5.049us ¨ä¤¤ 40MHz»P20MHz¬O¨â¿»P1/2Ãö«Y 2.526us»P5.049us°ò¥»¤W¤]¬O¨â¿»P1/2Ãö«Y µù:2.526*2À³¸Ó¬O5.052, 5.049/2À³¸Ó¬O2.5245 °ò¥»¤W³o¬O¶q´ú»~®t½d³ò,¤£¼vÅT¨â¿»P1/2Ãö«Y
±q³oùØ¥h¦^±À§äµª®×,¥i¯à·|§Ö¤@ÂI...
2018/07/17 10:48
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2015/12/28 16:20
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Hi jason680 :
20MHz »P 40MHz ³£¬O Clock source(Primary oscillator)
¦ý¬O PWM ³]©w¤W¦Yªº¬O Timer2 ªº PBCLK ÀW²v ¡A ·Ó²z¨Ó»¡¿é¥XÀ³¸Ó¤£·|¨ü¼vÅT¡C
Clock source ¦^±Àªº¤è¦¡¥h·Q :
§Ú·Qªk²q´ú¬O¦]¬°«ü¥O¶g´Á (TOSC = 1/FOSC = TCY) ªºÃö«Y¡A¦ý¬OPIC32RefManual-Dec2013 ¸ê®Æ¤¤´£¨Ñªº¤½¦¡ : PWM Period = [(PR + 1) • TPB • (TMR Prescale Value)] (TPB = 1/PBCLK )
¨S¦³´£¨ì©M«ü¥O¶g´Á¦³Ãö¡A¦]¬°¦¹³B³]©wªº PBCLK ³£¬O¤@¼Ëªº¡A²£¥Í¨â¿ªº®t²§¡A¤p§Ì¤£¸Ñ¦óì¦]¤Îì²z·§©À¡C
©Î³\¤]¬O¤p§Ì¦³¦a¤è¸ÑŪ¿ù»~¡AÁٽаª¤â«üÂI¡C
2018/07/17 11:44
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2007/06/05 21:45
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pic32mx470_OSC.jpg (145.90 KB)
2018/07/17 19:43
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2015/12/28 16:20
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Hi jason680 :
¦]¬°¦p¦P²Ä¤@«h©Ò»¡¡A§Ú¬O¨Ï¥Î :
System USB PLL > XTPLL,HSPLL,ECPLL,FRCPLL ¨«¶i¥hµ¹ PBCLK
°²³]¦p§Aµeªº¬õ½u¨ú¦V "Posc(XT,HS,EC)"¡A¨º¦b¨ä¥LªºSFR¸Ì´N¯à¬Ý¥XȤ£¥¿½T¤]´N¬O±q : OSCCON : bit 10-8 NOSC<2:0> , bit 14-12 COSC<2:0>
OSCCON = 0x53300 , Âà´««á¤]´N¬O 0101 0011 0011 0000 0000, ®Ú¾Ú¤Wzdatasheetµ¹ªº¹ï·Ó¤]¨S¦³°ÝÃD¡C
Á`µ²§Ú»{¬°¦YªºÀW²v¬O±q System USB PLL¥X¨Óªº¡A©Ò¥H§Ú¤£»{¬°¥L·|©M§A¹Ï©Òµeªº¤è¦¡¡A¦³¥ô¦óÃöÁp¡C
¦p¤p§Ì¦³Æ[©À¿ù»~¡A³Ò·ÐªÈ¥¿´£¿ô¡A·PÁ¡C
2018/07/18 09:56
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2009/04/07 13:30
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³o¦ì¥S§Ì, ±z¦n!
´£¨Ñ¥H¤U¨Ñ§A¦A¦¸À˵ø§Aªº clock source Ãö«Y.
¿ï¾Ü XTPLL,HSPLL,ECPLL,FRCPLL ¨Ó¨Ï¥Î®É,
¨Ã¤£¬O System USB PLL ªº¿é¥X,
¦Ó¬O System PLL ªº¿é¥X, (¤è¶ô¹Ï¤¤¥i¥H§ä¨ì)
¤£ºÞ¬O System PLL ©Î USB PLL ,
¥Ñ¤è¶ô¹Ï¤¤Åã¥Ü, ¥u¦³2Ó¨Ó·½¥i¨Ñ¿ï¥Î,
¤@Ó¬O Primary Oscillator,
¥t¤@Ó¬O FRC Oscillator,
ÅãµM§A¨Ã¤£¬O¿ï¥Î FRC Oscillator,
¨º»òÀ³¸Óªí¥Ü¥Ø«e System PLL »P USB PL
¬Ò¥H Primary Oscillator ¬°¿é¤J¨Ó·½.
2018/07/18 12:27
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2007/06/05 21:45
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§A»{¬°.... ¨º´Nµe±i¹Ï ¦AÀËÅç¤@¤U¹ï¿ù °ò¥»´N¯à¸Ñ¨M°ÝÃD...
2018/07/18 13:01
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2015/12/28 16:20
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¦¹¹Ï¬O§Ú©Ò»¡ªº¨«¦V¡A³o¼Ë¬O¹ïªº¶Ü?
ªþ¥[ÀÉ®×:
oscillator.jpg (287.26 KB)
2018/07/18 14:25
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Re: Ãö©ó Curiosity pic32mx470 ªºÀW²v³]©w»PPWM°T¸¹ |
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µù¥U¤é´Á: 2007/06/05 21:45
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2018/07/18 15:32
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