CSTAT?

Description

This command prints out statistics counters of the CAN (Controller Area Network) interface.
The output consist of five decimal numbers separated by whitespace (0x20) characters.

From left to right:

1. RX_OK: Number of successfully received and buffered CAN frames.

2. RX_LOST: Is incremented when the input FIFO has not enough room to store a received CAN Frame, so that frame must be thrown away.

3. TX_OK: Number of successfully transmitted CAN frames.

4. TX_FAILED: Is incremented when a frame could not be transmitted because the CAN interface is temporarily busy.

5. BUS_ERRORS: Is incremented on bus errors. e.g. there's no other node that acknowledge our retransmissions.

If the CAN driver is not active (on a module that doesn't use it), all counters remain zero.

Parameter

CSTAT? doesn't need any arguments.

Return value

ERR_OK (0) - Always

Example

CSTAT?

outputs the following: 411 0 17 1 4

Remarks

The CSTAT? command is only meaningful if the CAN interface is active. This command only prints statistics counters for the primary CAN interface.