Can Ports (Sja1000) - Connect Tech Multi-I/O User Manual

Connect Tech - Xtreme/Multi-I/O - Users Guide

CAN Ports (SJA1000)

These commands allow the 2 CAN Ports to be configured with Address and IRQ assignments. The
assignments can also be queried.
Command Operation
CAN? Query all the Address and IRQ settings for
both CAN (1 and 2) Ports
Cn? Query the Address and IRQ settings for a CAN Port
CnP? Query the Address setting for a CAN Port
CI? Query the IRQ setting for both CAN Ports
CnI? Query the IRQ setting for a CAN Port
CD? Query the CAN Port IO or MEMORY region setting
CM? Query the CAN decoding mode as BASIC or PELICAN
CSn? Query the Enable or Disable state of a CAN Ports
CP=v Set the Address for a CAN Port
See Note [1] below.
CI=v Set the IRQ for both CAN Ports.
See Note [2] below.
CnI=v Set the IRQ for a specific CAN Port.
CD=v Set the CAN Port decoding region.
CM=v Set the CAN Port Address decoding mode.
CSn=v Set the Enable / Disable state of a CAN Port
Notes:
1. When the Address is entered as a single value (ie: CP=0x400), then this is the Base Address for the group of Ports,
with the next Port being set Base+0x80 bytes. However, when the Addresses are entered as a comma separated list (ie:
CP=0x400,0x500), then each Port is set to the Address value indicated.

Examples:
o
With CM=B, CP=0x400

o
With CM=P, CP=0x400

o
With CP=0x0C0000 (the CM setting is ignored)

o
With CP=0x0C0000,0x0C2000 (the CM setting is ignored)

2. When the IRQ is entered as a single value (ie: CI=5), then this IRQ number is applied to both CAN Ports. However,
when the IRQs are entered as a comma separated list (ie: CI=9,11) then each CAN Port is set to the IRQ value
indicated.
3. The value specified for the CP= command implies either IO or Memory Space. When the value for the CP command
is a 3 digit IO address in Hex (0x000 to 0xFE0 or 0xF80), the IO Space is implied. When the value for the CP
command is a 6 digit Hex value (0x000000 to 0xFFFFE0 or 0xFFFF80).
decoding width, and the resulting IO address range.
4. The address decoding mode is used only when the CAN Ports are mapped into and IO region (with CD=P). The
SJA1000 must be set to operate in the mode that matches this address decoding mode (see the CLOCK DIVIDER
REGISTER in the SJA1000 data sheet for details).
Document: CTIM-00116
Revision: 0.02
CAN Port-1 = 0x400, CAN Port-2 = 0x480 (decoding width = 0x20)
CAN Port-1 = 0x400, CAN Port-2 = 0x480 (decoding width = 0x80)
CAN Port-1 = 0x0C0000, CAN Port-2 = 0x0C0080 (decoding width = 0x80)
CAN Port-1 = 0x0C0000, CAN Port-2 = 0x0C2000 (decoding width = 0x80)
Connect Tech Inc. Proprietary Information
Notes
n = 1 for CAN1
n = 2 for CAN2
n = (as above)
n = (as above)
n = 1 for CAN1
n = 2 for CAN2
v= Base Address value
See Note [3] below.
v= IRQ selections:
3,4,5,6,7,9,10,11,12,14,15
n = (as above)
v= IRQ selections:
3,4,5,6,7,9,10,11,12,14,15
v = 'P' for IO region decoded
'M' for MEMORY region decoded
v = 'B' for "BASIC" mode (0x20 boundary)
'P' for "PeliCAN" mode (0x80 boundary)
See Note [4] below.
v = 'E' to enable the Port
'D' to disable the Port
Page 18 of 50
0.02
See the IOD command for setting the IO
Date: Apr. 14, 2015