I-SmartFusion2 MSS
CAN Ukucushwa
Isingeniso
I-SmartFusion2 Microcontroller Subsystem (MSS) ihlinzeka nge-CAN hard peripheral (APB_1 ibhasi elincane).
Kukhanvasi ye-MSS, kufanele uvule (okuzenzakalelayo) noma ukhubaze isenzakalo se-CAN ngokusekelwe ekutheni siyasetshenziswa yini ohlelweni lwakho lokusebenza lwamanje. Uma kukhutshaziwe, isibonelo se-CAN sibanjwa ngokusetha kabusha (isimo samandla aphansi kakhulu).
Ngokuzenzakalela, uma kunikwe amandla, izimbobo ze-CAN zilungiswa ukuthi zixhumeke kudivayisi ye-Multi Standard I/Os (MSIOs). Qaphela ukuthi ama-MSIO abelwe isenzakalo se-CAN abelwe namanye ama-peripheral e-MSS. Lawa ma-I/O abelwe ayatholakala ukuze axhumeke kuma-MSS GPIOs namanye ama-peripheral uma isenzakalo se-CAN sikhutshaziwe noma uma izimbobo zesibonelo ze-CAN zixhunywe kwendwangu ye-FPGA.
Ukuziphatha okusebenzayo kwesibonelo se-CAN kufanele kuchazwe ezingeni lohlelo lokusebenza kusetshenziswa i-SmartFusion2 MSS CAN Driver ehlinzekwe yi-Microsemi.
Kulo mbhalo, sichaza ukuthi ungasilungiselela kanjani isibonelo se-MSS CAN futhi uchaze ukuthi amasiginali we-peripheral axhumeke kanjani.
Ukuze uthole imininingwane eyengeziwe mayelana ne-MSS CAN hard peripheral, sicela ubheke ku-SmartFusion2 User Guide.
Izinketho zokumisa
Azikho izinketho zokucushwa kwezingxenyekazi zekhompuyutha ze-CAN peripheral.
Qaphela: Uma isenzakalo se-CAN sinikwe amandla, i-M3_CLK kufanele ibe ukuphindaphinda okungu-8MHz. Lo mkhawulo uzosetshenziswa ku-MSS CCC Configurator.
Ithebula Lokwabiwa Kwezimpawu Zomngcele
Isakhiwo se-SmartFusion2 sinikeza i-schema eguquguquka kakhulu yokuxhuma amasiginali we-peripherals kuma-MSIO noma indwangu ye-FPGA. Sebenzisa ithebula lesignali yokumisa ukuze uchaze ukuthi i-peripheral yakho ixhumeke kuphi kuhlelo lwakho lokusebenza. Leli thebula lesabelo linamakholomu alandelayo (Umfanekiso 2-1):
I-MSIO - Ikhomba igama lesiginali le-peripheral elilungiselelwe umugqa onikeziwe.
Ukuxhumana Okuyinhloko - Sebenzisa uhlu lokudonsela phansi ukuze ukhethe ukuthi isignali ixhunywe ku-MSIO noma indwangu ye-FPGA.
Isikhombisi-ndlela - Ibonisa uma isikhombisi-ndlela sesiginali INGABE, INGAPHI noma INGAPHAKATHI.
Iphinikhodi Yephakheji - Ibonisa iphinikhodi yephakheji ehlotshaniswa ne-MSIO lapho isignali ixhunywe ku-MSIO.
Ukuxhumana Okungeziwe – Sebenzisa ibhokisi lokuhlola Izinketho Ezithuthukile ukuze view izinketho ezengeziwe zokuxhumana:
- Hlola inketho Yendwangu ukuze ubone kwindwangu ye-FPGA isignali exhunywe ku-MSIO.
- Hlola inketho ye-GPIO ukuze ubone isignali yenkomba yokufaka - kusukela kwendwangu ye-FPGA noma i-MSIO - usebenzisa i-MSS GPIO.
Ukuxhumana Preview
I-Connection Preview iphaneli kungxoxo ye-MSS CAN Configurator ibonisa umfanekiso view kokuxhumana kwamanje komugqa wesignali ogqanyisiwe (Umfanekiso 3-1).
Ukungqubuzana Kwezinsiza
Ngenxa yokuthi ama-peripherals e-MSS (MMUART, I2C, SPI, CAN, GPIO, USB, Ethernet MAC) abelana ngezinsiza zokufinyelela zendwangu ye-MSIO ne-FPGA, ukulungiselelwa kwanoma iyiphi yalezi zindawo kungase kubangele ukungqubuzana kwensiza lapho ulungiselela isenzakalo se-peripheral yamanje. Ama-peripheral configurator ahlinzeka ngezinkomba ezicacile lapho kuphakama ukungqubuzana okunjalo.
Izinsiza ezisetshenziswa umphumela we-peripheral olungiselelwe ngaphambilini ezinhlotsheni ezintathu zempendulo kusilungiselelo samanje se-peripheral:
• Ulwazi – Uma insiza esetshenziswa enye i-peripheral ingangqubuzani nokucushwa kwamanje, isithonjana solwazi siyavela ekuxhumekeni ngaphambili.view iphaneli, kuleyo nsiza. Ithiphu yamathuluzi esithonjaneni ihlinzeka ngemininingwane mayelana nokuthi iyiphi i-peripheral esebenzisa leyo nsiza.
• Isexwayiso/Iphutha – Uma insiza esetshenziswa enye i-peripheral ingqubuzana nokucushwa kwamanje, isithonjana sesixwayiso noma iphutha siyavela ekuxhumekeni kwangaphambili.view iphaneli, kuleyo nsiza. Ithiphu yamathuluzi esithonjaneni ihlinzeka ngemininingwane mayelana nokuthi iyiphi i-peripheral esebenzisa leyo nsiza.
Uma amaphutha eboniswa ngeke ukwazi ukwenza ukumisa kwamanje. Ungakwazi ukuxazulula ukungqubuzana ngokusebenzisa ukulungiselelwa okuhlukile noma ukhansele ukucushwa kwamanje usebenzisa inkinobho ethi Khansela.
Uma izixwayiso ziboniswa (futhi awekho amaphutha), ungakwazi ukwenza ukucushwa kwamanje. Nokho, awukwazi ukukhiqiza i-MSS iyonke; uzobona amaphutha esizukulwane efasiteleni lokungena le-Libero SoC. Kufanele uxazulule ukungqubuzana okudalile ngenkathi wenza ukumisa ngokulungisa kabusha noma iyiphi yezinto ezithinta umngcele ezidala ukungqubuzana.
Izihleli ze-peripheral zisebenzisa imithetho elandelayo ukuze zinqume uma ngabe ukungqubuzana kufanele kubikwe njengephutha noma isexwayiso.
- Uma i-peripheral elungiswayo iyi-GPIO peripheral ngakho konke ukungqubuzana kungamaphutha.
- Uma i-peripheral elungiswayo ingeyona i-GPIO peripheral ngakho konke ukungqubuzana kungamaphutha ngaphandle kwalapho ukungqubuzana kunensiza ye-GPIO lapho ukungqubuzana kuzothathwa njengezixwayiso.
Iphutha Example
I-peripheral ye-USB iyasetshenziswa futhi isebenzisa i-PAD yedivayisi eboshelwe ukupakisha iphinikhodi ye-V24. Ukulungiselela i-peripheral ye-CAN ngendlela yokuthi imbobo ye-RXBUS ixhumeke ku-MSIO kubangela iphutha.
Umfanekiso 4-1 ubonisa isithonjana sephutha esiboniswe kuthebula Lomsebenzi Wokuxhumanisa wembobo ye-RXBUS. 
Umfanekiso 4-2 ubonisa isithonjana sephutha esiboniswe ku-Preview iphaneli kusisetshenziswa se-PAD sembobo ye-RXBUS.
Isexwayiso Example
I-GPIO peripheral isetshenziswa futhi isebenzisa i-PAD yedivayisi eboshwe ukupakisha iphinikhodi ye-V24 (GPIO_3).
Ukulungiselela i-peripheral ye-CAN ngendlela yokuthi imbobo ye-RXBUS ixhumeke ku-MSIO kuphumela kusexwayiso.
Umfanekiso 4-3 ubonisa isithonjana sesixwayiso esiboniswa kuthebula Lomsebenzi Wokuxhumanisa wembobo ye-RXBUS.
Umfanekiso 4-4 ubonisa isithonjana sesixwayiso esiboniswe ekuqaleniview iphaneli kusisetshenziswa se-PAD sembobo ye-RXBUS. Qaphela ukuthi kulesi example, kukhona ukungqubuzana kwesibili ne-GPIO ngenxa yokuxhumana okwengeziwe ku-GPIO_3.
Ulwazi Example
I-peripheral ye-USB iyasetshenziswa futhi isebenzisa i-PAD yedivayisi eboshelwe ukupakisha iphinikhodi ye-V24. Ukulungiselela i-peripheral ye-CAN ukuze imbobo ye-RXBUS ixhumeke kwindwangu ye-FPGA akubangeli ukungqubuzana. Nokho, ukukhombisa ukuthi i-PAD ihlotshaniswa nembobo ye-RXBUS (kodwa ayisetshenziswanga kuleli cala), isithonjana solwazi siboniswa ku-Pre.view iphaneli (Figure 4-5). Ithiphu yamathuluzi ehlobene nesithonjana inikeza incazelo yokuthi insiza isetshenziswa kanjani (i-USB kulokhu).
Incazelo Yembobo
Ithebula 5-1 • Incazelo Yembobo
| Igama Lembobo | Port Group | Isiqondiso | Incazelo |
| RX | CAN_PADS CAN_FABRIC |
In | Isiginali yokwamukela yendawo. |
| TX | CAN_PADS CAN_FABRIC |
Phuma | CAN isignali yokudlulisa ibhasi. |
| TX_EN_N | CAN_PADS CAN_FABRIC |
Phuma | Isiginali yokulawula umshayeli yangaphandle. / Lokhu kusetshenziselwa ukukhubaza i-transceiver yangaphandle ye-CAN. / I-TX_EN_N igonyelwa lapho isilawuli se-CAN simisiwe noma uma isimo se-CAN singekho ibhasi. |
Qaphela:
- Amagama embobo anegama lesibonelo se-CAN njengesiqalo, isb CAN_RX.
- Amagama ezimbobo zokuxhuma okuyinhloko kwendwangu ane-“F2M” njengesijobelelo, isb. CAN _RX_F2M.
- Amagama ezimbobo zokufakwa kokuxhumana okwengeziwe kwendwangu ane-“I2F” njengesijobelelo, isb. CAN_RX_I2F.
- Amagama ezimbobo okukhiphayo nokunika amandla okukhiphayo amandla ane-“M2F” kanye ne-“M2F_OE” njengesijobelelo, isb. CAN_RX_M2F kanye ne-CAN_ RX_M2F_OE.
- Izimbobo ze-PAD ziphromothwa ngokuzenzakalelayo ukuthi zibe phezulu kulo lonke uhlelo lokuklama.
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Amadokhumenti / Izinsiza
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I-Microsemi SmartFusion2 MSS INGABE Ukucushwa [pdf] Umhlahlandlela Womsebenzisi I-SmartFusion2 MSS CAN Configuration, SmartFusion2, MSS CAN Configuration, CAN Configuration |
