szafonimateusz-mi opened a new pull request, #16285:
URL: https://github.com/apache/nuttx/pull/16285
## Summary
- arch/sim: add CAN support based on host SocketCAN
- boards/sim: add CAN support and configuration
## Impact
CAN interface can be used with simulator
## Testing
tested with `sim/can` configuration:
1. create virtual CAN on host:
```
ip link add dev can0 type vcan
ifconfig can0 up
```
2. run nuttx
3. bring up can0 on NuttX
```
nsh> ifup can0
ifup can0...OK
```
4. read CAN messages
```
nsh> candump can0
```
5. send CAN messages from host to NuttX
```
$ cansequence can0
```
6. frames received on NuttX
```
nsh> candump can0
can0 002 [1] 00
can0 002 [1] 01
can0 002 [1] 02
can0 002 [1] 03
can0 002 [1] 04
can0 002 [1] 05
can0 002 [1] 06
can0 002 [1] 07
can0 002 [1] 08
can0 002 [1] 09
can0 002 [1] 0A
can0 002 [1] 0B
can0 002 [1] 0C
can0 002 [1] 0D
can0 002 [1] 0E
can0 002 [1] 0F
can0 002 [1] 10
can0 002 [1] 11
can0 002 [1] 12
```
similar steps can be used to test CAN character driver with `examples/can`
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