Difference between revisions of "AOM-3841 CAN FD（CAN0/1）"
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| + | <p style="text-align: justify;">[[File:AOM-DB3500 CAN0 1.jpg|RTENOTITLE]] [[File:AOM-DB3500 CAN0 1 Pin define.jpg]]</p> | ||
| − | + | === '''Check Network Ports''' === | |
| − | | + | Check network ports of can0 and can1: |
| + | <pre># ifconfig -a | ||
| + | … … | ||
| + | can0: flags=193<UP,RUNNING,NOARP> mtu 16 | ||
| + | unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC) | ||
| + | RX packets 0 bytes 0 (0.0 B) | ||
| + | RX errors 0 dropped 0 overruns 0 frame 0 | ||
| + | TX packets 0 bytes 0 (0.0 B) | ||
| + | TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 | ||
| − | | + | can1: flags=193<UP,RUNNING,NOARP> mtu 16 |
| + | unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC) | ||
| + | RX packets 0 bytes 0 (0.0 B) | ||
| + | RX errors 0 dropped 0 overruns 0 frame 0 | ||
| + | TX packets 0 bytes 0 (0.0 B) | ||
| + | TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 | ||
| + | |||
| + | … … | ||
| + | </pre> | ||
| + | |||
| + | ==== '''Configure''' ==== | ||
| + | |||
| + | Use “ip” command to configure can port. See details of the usage of “ip link”: | ||
| + | <pre># ip link help | ||
| + | … … | ||
| + | ip link set { DEVICE | dev DEVICE | group DEVGROUP } | ||
| + | [ { up | down } ] | ||
| + | [ type TYPE ARGS ] | ||
| + | … … | ||
| + | </pre> | ||
| + | <pre># ip link help can | ||
| + | … … | ||
| + | ip link set DEVICE type can | ||
| + | [ bitrate BITRATE [ sample-point SAMPLE-POINT] ] | | ||
| + | [ dbitrate BITRATE [ dsample-point SAMPLE-POINT] ] | | ||
| + | [ fd { on | off } ] | ||
| + | … … | ||
| + | </pre> | ||
| + | |||
| + | For example, set can0 "birate rate” to 1000000 “dbitrate rate” to 2000000 “fd” to on | ||
| + | <pre># #---- For can0 ----# # | ||
| + | # ip link set can0 down | ||
| + | # ip link set can0 type can bitrate 1000000 dbitrate 2000000 fd on | ||
| + | # ip link set can0 up | ||
| + | </pre> | ||
| + | |||
| + | === '''Send and Reveive Data''' === | ||
| + | |||
| + | *'''As receiver''' | ||
| + | <pre># #---- As receiver ----# # | ||
| + | # ip link set can0 down | ||
| + | # ip link set can0 type can bitrate 1000000 dbitrate 2000000 fd on | ||
| + | # ip link set can0 up | ||
| + | # candump can0 & | ||
| + | </pre> | ||
| + | |||
| + | *'''As sender''' | ||
| + | <pre># #---- As sender ----# # | ||
| + | # ip link set can1 down | ||
| + | # ip link set can1 type can bitrate 1000000 dbitrate 2000000 fd on | ||
| + | # ip link set can1 up | ||
| + | # cansend can1 123##155 | ||
| + | |||
| + | # #----If no error, the receiver will receive the following data----# # | ||
| + | Can0 123 [01] 55</pre> | ||
Latest revision as of 04:07, 24 March 2026
Contents
CAN FD
AOM-3841 has two CAN ports.
Use the “candump” and “cansend” tools directly to send and receive messages. The tools have been embedded into the system.
AOM-DB3500 CAN0_1 HW Pindefine
| Pin | Signal | I/O | Description |
| 1 | CAN0_D+ | I/O | CAN0 Data+ |
| 2 | CAN0_D- | I/O | CAN0 Data- |
| 3 | CAN1_D+ | I/O | CAN1 Data+ |
| 4 | CAN1_D- | I/O | CAN1 Data- |
| 5 | GND | Ground | |
| 6 | GND | Ground | |
| 7 | N/A | Not Applicable | |
| 8 | N/A | Not Applicable |
Check Network Ports
Check network ports of can0 and can1:
# ifconfig -a … … can0: flags=193<UP,RUNNING,NOARP> mtu 16 unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 can1: flags=193<UP,RUNNING,NOARP> mtu 16 unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 10 (UNSPEC) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 … …
Configure
Use “ip” command to configure can port. See details of the usage of “ip link”:
# ip link help
… …
ip link set { DEVICE | dev DEVICE | group DEVGROUP }
[ { up | down } ]
[ type TYPE ARGS ]
… …
# ip link help can
… …
ip link set DEVICE type can
[ bitrate BITRATE [ sample-point SAMPLE-POINT] ] |
[ dbitrate BITRATE [ dsample-point SAMPLE-POINT] ] |
[ fd { on | off } ]
… …
For example, set can0 "birate rate” to 1000000 “dbitrate rate” to 2000000 “fd” to on
# #---- For can0 ----# # # ip link set can0 down # ip link set can0 type can bitrate 1000000 dbitrate 2000000 fd on # ip link set can0 up
Send and Reveive Data
- As receiver
# #---- As receiver ----# # # ip link set can0 down # ip link set can0 type can bitrate 1000000 dbitrate 2000000 fd on # ip link set can0 up # candump can0 &
- As sender
# #---- As sender ----# # # ip link set can1 down # ip link set can1 type can bitrate 1000000 dbitrate 2000000 fd on # ip link set can1 up # cansend can1 123##155 # #----If no error, the receiver will receive the following data----# # Can0 123 [01] 55