can是一種基于廣播的通訊機制,報文依靠報文標(biāo)識符來進行識別。can協(xié)議支持兩種幀格式,不同之處在于標(biāo)識符域的長度不同,一種被稱為can標(biāo)準(zhǔn)幀,支持11bit的標(biāo)識符長度;另一種稱為can擴展幀,支持29bit的標(biāo)識符。
廈門岳航計算機工程有限公司
聯(lián)系人:李素云
企業(yè)QQ:2851195446,2851195466
手機:18965423501
座機:0592-5165501
can接口芯片選用philips公司的can獨立控制器sja1000。arm處理器at91rm9200內(nèi)部集成了外部總線接口ebi,通過此接口與sja1000連接。從sja1000輸出的can信號,通過光藕器件隔離后連接到收發(fā)器tja1050,收發(fā)器的輸出與總線連接。
sja1000的地址線和數(shù)據(jù)線是分時復(fù)用的,而at91rm9200的外部數(shù)據(jù)總線接口ebi的地址線和數(shù)據(jù)線是相互獨立的,因此,需要通過軟件編程實現(xiàn)地址的鎖存,以達(dá)到數(shù)據(jù)和地址的分時傳輸。硬件原理圖如圖3[3]。
New Treadlite II T-91-PS Foot Switch w/ 8' Audio Cable 3A 30VAC Max
New LineMaster Treadlite II T-91-S Foot Switch
Linemaster Treadlite II T-91-S Foot Switch, 15A 125-250VAC, 1/2HP
Linemaster 532-SWN Hercules Foot Switch, 20A 125-250VAC, 1HP 125-250VAC
Conntrol 893-1000-00 Foot Switch w/Guard, 20A, 1HP, 125-250VAC
Compact 491-S Foot Switch w/Guard, 10A 125-250VAC, 1/2HP 125-250VAC
Linemaster T-51-SC36 Treadlite Foot Switch w/Guard, 7A 125-250VAC, 1/6HP 125VAC
Linemaster T-91-S Treadlite II Foot Switch w/Guard, 15A 125-250V, 1/2HP 125-250V
New Altech Corp FK1 SU1L 51.901B Foot Switch 250VAC 10A SPDT Black IP43
Linemaster 531-SWHOX Heavy Duty Foot Switch, 20A 125-250VAC, 1HP 125-250VAC
New Pizzato VF KIT31
Tapeswitch Model III Controflex Foot Switch 2 Wire 5" x 2"
New Treadlite II T-91-SC36 Foot Switch 10A 1/2HP 125-250VAC
Linemaster Executive 72 Footswitch 10A 125-250VAC
Light Duty S100-1002 Foot Switch 10AMP, 125/250VAC
Conntrol 892-1460-03 Footswitch 125-250VAC 10A 1/2 HP
Highly EFS-D Foot-Switch 10A 250VAC
Tapeswitch 111 Footswitch 2" x 5" x 0.0375" 5lbs Pressure Rating Black
Treadlite II T-91-SC36 Foot Switch 10A 1/2HP 125-250VAC
Herga 6289-CC Footswitch 3A 250VAC
Linemaster 522-B12 Dual Full Foot Guard
Linemaster 522-B14 Full Guard w/Treadlite II T-91-S Foot Switch
New STI SL Series 44505-2011 Limit Switch SL-MP11M 1N.C. + 1N.O.IC695ETM001
JACP-921900 CP-9200SH/SVA
MMC-BDP081PNA
MMS6312
MX-CS101-401
PCD2.M110
PCD4.M120
PCI-6111
PCI-6224
PCI-6509
RDC2
SG2K-1T
SST-PFB-CLX
TI435-CPU
DSSR122 48990001-NK
1747-L543
CP60
FBM201
FBM206
FBM217
FBM231
FBM237
PF3S-BP13
PF3S-PSA1
Micro Switch LSN1A Heavy-Duty Limit Switch, 2-Pos Maintained, SPDT, 10A Contacts
Telemecanique XCM NFC 63-140 Limit Switch, 300V 6A
Micro Switch EX-AR16 Explosion Proof Snap Switch 480VAC 15A 1/4 HP *No Roller*
Durant E-S-4-X Limit Switch with Enclosure Cork Gasket 1/4" Diameter Shaft
Namco EA15030275 Rotary Limit Switch 460VAC 3A 1NC 1NO CW/CCW 1/2" NPT
Micro Switch 8LS125 Precision Limit Switch, 10A-120,240 or 480VAC
Micro Switch 11LS9 Limit Switch w/Roller Arm, 10A-125 or 250VAC, 1/2HP - 125VAC
Schmersal Z4VH 336-11z Limit Switch
Omron ZC-N2255 10A Limit Switch 250 VAC
圖3 CAN接口硬件原理圖