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the CAN bus, diagnostics


 13.06.2010  start of date 

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(c) 2010 Pavel Pindora 




Hardware for CAN bus




USB - CAN bus interface




MCP2515 SPI CAN bus controler http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010406
82C250 CAN Transceiver 1Mb http://www.semiconductors.philips.com/acrobat_download/datasheets/PCA82C250_5.pdf



CAN diag. 

S04 (Id1 = 1025 - 1030) , 

Id1 = 3 test only, a noise


CAN diag. 

Masking received message  noise 3, KV04 257, SP04 129


Now, the Input of KV04 has been changed



CAN bus and some description  (11.2.2006)

Délka vedení (Length of wire) Resistance Ohm / 1m Max. Baud rate
< 40m <70mO/m  1Mbits/sec
< 300m <60 mO/m  500kbits/sec
< 600m <40 mO/m 100kbits/sec
< 1000m <26 mO/m 50kbits/sec