AP29002
Standalone TwinCAN Controller
Using special features of the 82C900
Application Note
41
V 1.0, 2004-02
3.8
Configuration via CAN-Bus
After the configuration of one Node and one message object, the 82C900 can be
configured via CAN-Bus. These initmessages contain as a first byte the Initcode (here
0xAA), then two bytes of address and one to four bytes of data. The following
sequence will configure the second Node for 125 KBaud and 2 more message objects
so that 82C900 will work as unidirectional gateway between the two CAN-Busses.
Figure 11
82C900 after the initialization via CAN-Messages
C A N -B U S 1 1 M B a u d
C A N -B U S 2 1 2 5 K B a ud
N o d e A
M e s sa g e o b je c t 1 ID 0 2 ,
R e c e iv in g O b je c t,
N o r m a l G a te w a y,
1 D a ta b y te
In itia liz a t io n M e ssa g e o b je c t0
ID 0 3 , I nit c o d e 0 x A A
8 2 C 9 0 0
R e g is te r -S e t
M e s sa g e o b je c t 2 ID c o p ie d ,
T r a n s m it ting O b je c t,
N o r m a l G a te w a y,
1 D a t a b y te
N o d e B
