XtendLan TCD-N2600-C2G2-2, Руководство пользователя

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D & A
Buffer
Decoder
SJA1000
CAN-BUS
Controller
CO
M
2-
DB9
CA
N
OPTO
Isolation
CANBUS
This section describes how to program and use the CAN BUS. It’s provides a
Description of the I/O memory map of the chip and discussion of the internal
registers to aid you in programming your CAN controller chip.
‘
Defined Memory Mapping And Interrupt
The CANBUS occupies 2 bytes of TCD-N2600-C2G2-2 memory space. You can set
the base address and access to the internal resources of the SJA1000 CAN
controller chip. The SJA1000 chip access is multiplexed in such a way that the host
must first write to 300h the internal address of the CAN chip and after that perform
a write to address 301h with the actual data to be written into the desired memory
location. Address 302h is a hardware-reset function of the SJA1000. Performing a
read or write to this address will cause a hardware reset to the CAN controller. You
may need to reset the chip in case of an unrecoverable error in the CAN controller
chip. And your can use interrupt the main processor when a message is received
or transmitted if interrupts are enabled on the FX5312. By using interrupts you can
write powerful code to CAN.
Description Factory Setting
Base Address 300H
Data Of Address 301H
Hardware Reset Of SJA1000 Chips
302H
Interrupt Require Quest 11
Xceiver
Lo
cal
B
us