I-MICROCHIP TB3308 UkuPhathwa kweMiba yokuBambana kweCache ngexesha lokuSebenza usebenzisa uLondolozo lweCache
Intshayelelo
Umba wokuhambelana kwe-cache awunakuphepheka kwizicelo ezisebenza kwii-microcontrollers (MCUs) ezinemimandla yememori efihliweyo, esebenzisa i-Memory Access Access (DMA) kwimisebenzi yokudlulisa idatha. Oku kubangelwa ukuba i-CPU yenza umsebenzi wokufunda / wokubhala kwi-cache ngelixa i-DMA idlulisela idatha phakathi kwe-peripheral kunye nememori yomzimba.
Enye yeendlela zokuphatha ukuhambelana kwe-cache ifuna ukuba isicelo silawule i-cache ngexesha lokuqhuba usebenzisa imisebenzi yokugcinwa kwe-cache. I-MPLAB® Harmony v3 ibonelela nge-cache yokugcinwa kweNkqubo ye-Interfaces (APIs) yezixhobo zePIC32MZ.
Olu xwebhu luchaza indlela isicelo esinokulawula ngayo imiba yokuhambelana kwe-cache ngexesha lokuqhuba ngokusebenzisa i-APIs yolawulo lwe-cache phantsi kwe-MPLAB Harmony v3.
Phawula: Iingqikelelo ekuxoxwe ngazo kolu xwebhu ziqhelekile kuzo zonke ii-PIC32MZ MCUs. I-PIC32MZ EF isetyenziswa njenge-example ukuxoxa imiba.
Inkcazo
Eli nani lilandelayo libonisa umba wokuhambelana kwe-cache njengoko kuqatshelwe xa i-DMA ifunda kwi-SRAM kwi-PIC32MZ EF MCU.
Umfanekiso 1-1. iMemory-to-Peripheral Transfer (i-DMA ifundeka kwi-SRAM)
Isicelo singenisa isicelo sokudlulisela isithinteli sedatha ye-TxBuffer ixabiso 'ABCDEFGH' kumda wecala. I-CPU igcwalisa i-DMA yokubhala isithinteli (TxBuffer) ngedatha eza kubhalwa 'ABCDEFGH' kumda wecala.
Nangona kunjalo, ngenxa yomgaqo-nkqubo we-cache obekiweyo Bhala Emva kwaye Ubhale Ukwaba, i-DMA yokubhala i-buffer (TxBuffer) ayinakubhalwa ngokukhawuleza kwimemori eyintloko, kwaye idatha ebhaliweyo inokuhlala kwi-cache yedatha. I-DMA yokubhala isithinteli (TxBuffer) kwimemori engundoqo isenexabiso elidala lika-'12345678'.
Xa i-DMA isenziwa ukuba iqalise ugqithiselo lwememori-ukuya-peripheral, i-DMA ifunda isithinteli (TxBuffer) kwimemori engundoqo njenge-'12345678'. Ngenxa yoko, i-DMA iphetha ngokudlulisela idatha yakudala kwi-peripheral.
Eli nani lilandelayo libonisa umba wokuhambelana kwecache oqatshelweyo xa i-DMA ibhalela i-SRAM.
Umfanekiso 1-2. Ugqithiso lwe-Peripheral-to-Memory (i-DMA ibhalela kwi-SRAM)
Isicelo sifaka isicelo sokufumana idata kwi-RxBuffer enexabiso elithi '12345678' elisuka kumda wolwazi. I-DMA igcwalisa i-RxBuffer ngexabiso le-'12345678' kwi-SRAM. Nangona kunjalo, i-cache yedatha ayihlaziywa, kwaye iyaqhubeka nokubamba idatha yangaphambili. Xa i-CPU ifunda i-RxBuffer, iphetha ngokufunda ixabiso langaphambili elikwi-buffer njenge-'ABCDEFGH'.
Ukuphatha iCache Coherency
Iindlela ezimbini zokusingatha imiba yokuhambelana kwe-cache zibonakaliswe kwiMemori kwi-Peripheral Transfer (i-DMA ifunda kwi-SRAM) kunye ne-Peripheral-to-Memory Transfer (i-DMA ibhalela kwi-SRAM). Ezi ndlela ziquka usetyenziso olulawula i-cache ngexesha lokuqhuba usebenzisa imisebenzi yokulondoloza. Imisebenzi ibandakanya ukukwazi ukwenza ezi ntshukumo:
Yenze ukuba ingasebenzi i-cache: Iphawula imigca yecache njengengasebenziyo. Ukufikelela okulandelayo kunyanzela idatha ukuba ikhutshelwe kwimemori engundoqo ukuya kwi-cache.
Coca i-cache: Ubhala imigca ye-cache, ephawulwe njengemdaka, ubuyela kwimemori engundoqo Ukusingatha ukuhambelana kwe-cache kuxoxwe kwi-Memory ukuya kwi-peripheral Transfer (i-DMA ifundeka kwi-SRAM), yenza ezi ntshukumo zilandelayo:
- Isicelo sigcwalisa isithinteli sedatha yokubhala (TxBuffer) ngexabiso 'ABCEDFGH'. Ngenxa yomgaqo-nkqubo we-cache ongagqibekanga (Bhala Emva kwaye Ubhale Yabela), idatha ebhaliweyo inokuba kwi-cache.
Umfanekiso 1-3. Populate Bhala Buffer
- Gubha isikhuseli sedatha yokubhala (TxBuffer) ngexabiso 'ABCDEFGH' kwimemori engundoqo ngokubiza i-API egciniweyo ecocekileyo.
Umfanekiso 1-4. Flush Bhala isithinteli
- Isicelo singenisa isicelo sokudlulisa idatha esuka kwi-TxBuffer enexabiso le-'ABCDEFGH' ukuya kumda we-peripheral.
Umfanekiso 1-5. Bhalela kwi-peripheral
Ukuphatha ukuthungelana kwecache njengoko kuxoxiwe kwi-Peripheral to Memory Transfer (i-DMA Ibhalela kwi-SRAM), landela la manyathelo:
- Usetyenziso lubiza i-API ye-Cache engasebenziyo ukuphawula imigca ye-cache njengengasebenziyo.
Umfanekiso 1-6. I-Cache engasebenziyo
- Isicelo sifaka isicelo sokufumana idata kwi-RxBuffer enexabiso elithi '12345678' elisuka kumda wolwazi.
- I-DMA igcwalisa i-RxBuffer ngexabiso le-'12345678' kwi-SRAM.
- Ngenxa yokuba umgca we-cache ohambelana ne-RxBuffer ukwimeko engasebenziyo, ufikelelo olufundwayo yi-CPU lukhokelela ekubeni i-RxBuffer ikotshwe kwimemori engundoqo ukuya kugcino lwedatha.
Umfanekiso 1-7. Bamba i-Peripheral-to-Memory Transfer Cache Coherency
Ukuphunyezwa
Uqwalaselo
Kwiprojekthi ye-MPLAB Harmony v3 ye-PIC32 MZ EF, imisebenzi yokugcinwa kwe-cache inikwe amandla yi-MPLAB Harmony v3 Configurator (MHC) okanye i-MPLAB Code Configurator (MCC). Kwi-MHC okanye i-MCC, useto lolungelelwaniso lunokufunyanwa phantsi kwegrafu yeprojekthi > Inkqubo > Uqwalaselo lwe-MIPS > I-Cache.
Umfanekiso 2-1. Uqwalaselo lwe-Cache ye-MHC
Data-Cache Maintenance APIs
I-MPLAB Harmony v3 ibonelela ngolu lwazi lulandelayo lwe-APIs yokugcina i-cache:
Uluhlu 2-1. Data-Cache Maintenance APIs
| Igama | Inkcazo |
| DCACHE_INVALIDATE (ingekho) | Ayisebenzi yonke i-cache yedatha phambi kokuba ivulwe. |
| DCACHE_CLEAN_BY_ADDR (uint32_t addr, size_t sz) | Bhala kwakhona kwaye wenze uluhlu lweedilesi lungasebenzi kwi-cache yedatha. |
| DCACHE_INVALIDATE_BY_ADDR (uint32_t addr, size_t sz) | Uluhlu lweedilesi aluvumelekanga kwi-cache yedatha. |
| DCACHE_CLEAN_INVALIDATE_BY_ADDR (uint32_t addr, size_t sz) | Bhala kwakhona kwaye wenze uluhlu lweedilesi lungasebenzi kwi-cache yedatha. |
Amanqaku:
- Idatha ethile ye-MCU kunye nee-API zokugcinwa kwe-cache yomyalelo ziyafumaneka njengethala leencwadi le-peripheral (PLIB) plib_cache.c. Jonga kwi-PLIB isicelo umzekeloampkwi:
https://github.com/Microchip-MPLAB-Harmony/csp_apps_pic32mz_ef/tree/master/apps/cache/cache_maintenance. - Xa usebenzisa i-cache icocekile kwaye i-cache ayisebenzi ngedilesi APIs:
- ukongeza: Kufuneka ilungelelaniswe kumda wesayizi wecache. Oku kuthetha ukuba idilesi ye-DMA buffer kufuneka ilungelelaniswe kumda we-16-byte.
- dsize: Kufuneka ibe yimpinda yobungakanani bomgca wecache. Oku kuthetha ukuba ubungakanani be-buffer ye-DMA kufuneka ibe yi-multiple of 16- bytes.
Example
Le khowudi ilandelayo example ibonisa ukusetyenziswa kwee-APIs zokugcinwa kwe-data-cache kunye ne-MPLAB Harmony v3 DMA peripheral library APIs ukufunda nokubhala idatha kwi-interface ye-UART.
Ukufumana iinkcukacha zekhowudi yomthombo, bhekisa kwi-PLIB yesicelo exampkwi:
https://github.com/Microchip-MPLAB-Harmony/csp_apps_pic32mz_ef/tree/master/apps/cache/cache_maintenance.
Phawula: Imiba yokuhambelana kwe-cache exutyushwa ngasentla inokusingathwa kwakhona ngexesha lekhonkco ngokusebenzisa uphawu oluhambelanayo oluguquguqukayo kwi-buffer yedatha kwingxabano.
int engatyikitywanga __impawu__((ehambelanayo)) isithinteli[1024];
Kule khowudi, umqambi unikezela (ngexesha lekhonkco) into ye-1024 kwindawo yememori engabonakaliyo KSEG1.
Iimbekiselo
La maxwebhu alandelayo adweliswe njengezibonelelo. Ngolwazi olongezelelweyo malunga nokuhambelana kwe-cache kunye neemveliso ezinxulumene ne-Microchip, bhekisa kwi-Microchip Webindawo, okanye uqhagamshelane nommeli wentengiso yeMicrochip yendawo.
- Ukusebenzisa i-L1 Cache kwi-PIC32MZ iDevices
- PIC32MZ EF Ugcino lweCache PLIB Example
- I-MPLAB Harmony v3 Iphakheji yee-Quick Docs ibonelela ngamaphepha oncedo azimeleyo kubasebenzisi ukuba baqalise ukuphuhlisa usetyenziso kwi-Microchip's 32-bit SAM kunye ne-PIC32 MCUs. Khuphela i quick_docs repository kwaye uqale nge index.html file iyafumaneka kwifolda yamaxwebhu.
Inguqulelo ye-intanethi iyafumaneka: microchip-mplab-harmony.github.io/quick_docs/. - I-MPLAB Harmony v3 yokufika web iphepha: www.microchip.com/mplab/mplab-harmony
I Microchip Webindawo
I-Microchip ibonelela ngenkxaso ye-intanethi ngokusebenzisa yethu webindawo kwi www.microchip.com/. Oku webindawo isetyenziselwa ukwenza files kunye nolwazi olufumaneka lula kubathengi. Eminye imixholo ekhoyo iquka:
- Inkxaso yeMveliso- Amaxwebhu edatha kunye neerrata, amanqaku esicelo kunye ne-sampiinkqubo, izixhobo zoyilo, izikhokelo zabasebenzisi kunye namaxwebhu enkxaso yehardware, ukukhutshwa kwesoftware yamva nje kunye nesoftware egciniweyo
- Inkxaso yobuGcisa ngokubanzi – Imibuzo Ebuzwa Rhoqo (FAQs), izicelo zenkxaso yobugcisa, amaqela eengxoxo kwi-Intanethi, uluhlu lwamalungu enkqubo yoyilo lweMicrochip
- Ishishini leMicrochip- Umkhethi wemveliso kunye nezikhokelo zokuodola, ushicilelo lwamva nje lweMicrochip, uluhlu lweesemina kunye nemisitho, uluhlu lweeofisi zentengiso yeMicrochip, abasasazi kunye nabameli befektri.
Inkonzo yesaziso soTshintsho kwimveliso
Inkonzo yesaziso yokutshintsha imveliso yeMicrochip inceda ukugcina abathengi bangoku kwiimveliso zeMicrochip. Ababhalisi baya kufumana isaziso se-imeyile nanini na kukho utshintsho, uhlaziyo, uhlaziyo okanye iimpazamo ezinxulumene nosapho lwemveliso ethile okanye isixhobo sophuhliso esinomdla.
Ukubhalisa, yiya ku www.microchip.com/pcn kwaye ulandele imiyalelo yobhaliso.
Uxhaso lwabathengi
Abasebenzisi beemveliso zeMicrochip banokufumana uncedo ngeendlela ezininzi:
- Umsasazi okanye uMmeli
- I-Ofisi yoThengiso yasekuhlaleni
- Embedded Solutions Engineer (ESE)
- Uxhaso lobuchwepheshe
Abathengi kufuneka baqhagamshelane nomthengisi wabo, ummeli okanye i-ESE ngenkxaso. Iiofisi zeentengiso zasekuhlaleni zikwafumaneka ukunceda abathengi. Uluhlu lweeofisi zokuthengisa kunye neendawo zibandakanyiwe kolu xwebhu.
Inkxaso yobugcisa ifumaneka nge webindawo e: www.microchip.com/support
Microchip Devices Code Protection Feature
Qaphela ezi nkcukacha zilandelayo zenqaku lokhuseleko lwekhowudi kwiimveliso zeMicrochip:
- Iimveliso zeMicrochip ziyahlangabezana nemigaqo equlethwe kwiMicrochip Data Sheet yazo.
- IMicrochip ikholelwa ukuba usapho lwayo lweemveliso lukhuselekile xa lusetyenziswa ngendlela ecetywayo, ngokwemigaqo yokusebenza, naphantsi kweemeko eziqhelekileyo.
- Ixabiso leMicrochip kwaye likhusela ngokungqongqo amalungelo epropathi enomgangatho ophezulu wokuqonda. Iinzame zokwaphula ikhowudi yokukhusela iimpawu zeMicrochip zithintelwe ngokungqongqo kwaye zinokwaphula umthetho weDigital Millennium Copyright Act.
- Ayikho i-Microchip okanye nawuphi na umenzi we-semiconductor onokuqinisekisa ukhuseleko lwekhowudi yayo. Ukukhuselwa kwekhowudi akuthethi ukuba siqinisekisa ukuba imveliso "ayinakwaphulwa". Ukhuseleko lwekhowudi luhlala luvela. I-Microchip izinikele ekuphuculeni ngokuqhubekayo iimpawu zokukhusela ikhowudi kwiimveliso zethu.
Isaziso soMthetho
Olu papasho kunye nolwazi olulapha lunokusetyenziswa kuphela ngeemveliso zeMicrochip, kubandakanywa ukuyila, ukuvavanya, kunye nokudibanisa iimveliso zeMicrochip kunye nesicelo sakho. Ukusetyenziswa kolu lwazi ngayo nayiphi na enye indlela kwaphula le migaqo. Ulwazi malunga nosetyenziso lwesixhobo lunikezelwa kuphela ukulungiselela wena kwaye lunokuthi luthathelwe indawo luhlaziyo. Luxanduva lwakho ukuqinisekisa ukuba isicelo sakho siyadibana neenkcukacha zakho. Qhagamshelana neofisi yakho yentengiso yeMicrochip yengingqi ngenkxaso eyongezelelweyo okanye, ufumane inkxaso eyongezelelweyo kwi www.microchip.com/en-us/support/design-help/client-support-services.
OLU LWAZI LUBONWA NGE-MICROCHIP “NJENGOKO ZINJALO”. I-MICROCHIP AYENZI Mmeli OKANYE IZIQINISEKISO ZALO NALUPHI UHLOBO, OKANYE INGCACILEYO OKANYE IYACINGQIWA, IYABHALWA OKANYE NGOMLOMO, EMTHETHWENI.
OKANYE OKUNYE, OKUNXULUMENE NOLWAZI KUBANDAKANYEKA KODWA AKUMNTU MANDLA KWIZIQINISEKISO EZIXHONYIWEYO ZOKUNGAPHUMULI, UKUTHENGISWA, NOKULUNGELELWA NGENJONGO ETHILE, OKANYE IZIQINISEKISO EZINXULUMENE NEMEKO, UMTHETHO, UMGANGATHO WAWO.
AKUKHO SIGANEKO IYA KUTHWATHWA NALUPHI NA I-MICROCHIP ESIYA KUTHWALA NGALO NALUPHI NA ULWAZI, OLUKHETHEKILEYO, LWESOHLWAYO, NGESIGANEKO, OKANYE OKUPHUMELELE Ilahleko, UMONAKALO, IINDLEKO, OKANYE INKCITHO YALO NOLUPHI NA UHLOBO ELUYANXULUMENE NOLWAZI OKANYE UKUSETYENZISWA KWALO, NANGONA INGCACISO, NANGENZWENI. OKUSEKO OKANYE UMONAKALO UYABONAKALA. NGOKUPHELELEYO UXANDUVA LUVUMELEKILEYO NGOMTHETHO, UXANDUVA LWONKE LE-MICROCHIP KULONKE AMABANGO NGAYO NAYIPHI NA IINDLELA EZINXULUMENE NOLWAZI OKANYE UKUSETYENZISWA KWALO AKUYI KUGQIBELA ISIXA SOMRHUMO, UKUBA NAKHO, OWUHLAWULE NGQO UKUBA ULWAZI LWAZI.
Ukusetyenziswa kwezixhobo zeMicrochip kwinkxaso yobomi kunye / okanye izicelo zokhuseleko ngokupheleleyo kumngcipheko womthengi, kwaye umthengi uyavuma ukukhusela, ukuhlawulela kwaye ubambe iMicrochip engenabungozi kuyo nayiphi na kunye nawo wonke umonakalo, amabango, iisuti, okanye iindleko ezibangelwa kukusetyenziswa okunjalo. Akukho zilayisenisi zigqithiswayo, ngokungafihlisiyo okanye ngenye indlela, phantsi kwawo nawaphi na amalungelo epropathi yemveliso yeMicrochip ngaphandle kokuba kuchazwe ngenye indlela.
Iimpawu zokuthengisa
Igama leMicrochip kunye nelogo, uphawu lweMicrochip, Adaptec, AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud, CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO, JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo, MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch, SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash , Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O, Vectron, kunye ne-XMEGA ziimpawu zorhwebo ezibhalisiweyo ze-Microchip Technology Incorporated e-USA nakwamanye amazwe.
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USA kunye namanye amazwe.
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Ilogo ye-Adaptec, Frequency on Demand, Silicon Storage Technology, Symmcom, kunye nexesha eliThenjiweyo ziimpawu zorhwebo ezibhalisiweyo zeMicrochip Technology Inc. kwamanye amazwe.
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Zonke ezinye iimpawu zorhwebo ezikhankanywe apha ziyipropathi yeenkampani zabo.
© 2021, Microchip Technology Incorporated kunye nenkxaso yayo. Onke Amalungelo Agciniwe.
ISBN: 978-1-5224-9447-8
Inkqubo yoLawulo loMgangatho
Ngolwazi malunga neMicrochip's Quality Management Systems, nceda undwendwele www.microchip.com/quality.
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Umnxeba: 358-9-4520-820 France - Paris
Umnxeba: 33-1-69-53-63-20 Ifeksi: 33-1-69-30-90-79 eJamani – Garching Umnxeba: 49-8931-9700 eJamani – Haan
Umnxeba: 49-2129-3766400 eJamani - Heilbronn Umnxeba: 49-7131-72400 eJamani - Karlsruhe Umnxeba: 49-721-625370 eJamani - eMunich Umnxeba: 49-89-627-144-0 Ifeksi: 49-89-627-144 -44 eJamani - Rosenheim Umnxeba: 49-8031-354-560 Israel - Ra'anana
Umnxeba: 972-9-744-7705 Italy-Milan
Umnxeba: 39-0331-742611 Ifeksi: 39-0331-466781 Italy - Padova
Umnxeba: 39-049-7625286 Netherlands – Drunen Umnxeba: 31-416-690399 Ifeksi: 31-416-690340 Norway – Trondheim Umnxeba: 47-72884388 Poland – Warsaw
Umnxeba: 48-22-3325737 Romania - Bucharest Umnxeba: 40-21-407-87-50 Spain - Madrid
Umnxeba: 34-91-708-08-90 Ifeksi: 34-91-708-08-91 Sweden – Gothenberg Umnxeba: 46-31-704-60-40 Sweden – Stockholm Umnxeba: 46-8-5090-4654 UK – Wokingham
Tel: 44-118-921-5800 Fax: 44-118-921-5820
Amaxwebhu / Izibonelelo
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I-MICROCHIP TB3308 UkuPhathwa kweMiba yokuBambana kweCache ngexesha lokuSebenza usebenzisa uLondolozo lweCache [pdf] Isikhokelo somsebenzisi I-TB3308 UkuPhathwa kweMiba yokuNxulumaniswa kweCache ngexesha lokuSebenza usebenzisa iCache Maintenance, TB3308, Ukuphatha iCache Coherency Imiba ngexesha lokuSebenza usebenzisa uLondolozo lweCache, uRuntime usebenzisa uLondolozo lweCache, uLondolozo lweCache |
