Re: Bug? -- NEVER getting controller-problem{back-to-error-active}

[ajneu <ajneu1@gmail.com>]

ajneu <ajneu1 <at> gmail.com> writes:
> I'm using a PEAK USB Adapter (PCAN-USB FD) for normal CAN Frames (standard
> format), and lsmod shows peak_usb as it should.
> 
> When running on a can bus and continually send out messages (one frame each
> second).
> But there is no other participant, so I will get NO ACK.
> 
> So berr-counter-tx counts up until it reaches
> 96:
> -> enter state ERROR-WARNING.
> 
>    I then get a frame:
>    Error: 
> 	Id  : 0x20000004
> 	Data: 0x0 0x8 0x0 0x0 0x0 0x0 0x0 0x0 
> 	controller-problem{tx-error-warning}
> [...]

I should mention which settings I'm using (I hope the settings are ok.)

        const can_err_mask_t err_mask =
            ( CAN_ERR_TX_TIMEOUT   /* TX timeout (by netdevice driver) */
            | CAN_ERR_LOSTARB      /* lost arbitration    / data[0]    */
            | CAN_ERR_CRTL         /* controller problems / data[1]    */
            | CAN_ERR_PROT         /* protocol violations / data[2..3] */
            | CAN_ERR_TRX          /* transceiver status  / data[4]    */
            | CAN_ERR_ACK          /* received no ACK on transmission */
            | CAN_ERR_BUSOFF       /* bus off */
            //CAN_ERR_BUSERROR     /* bus error (may flood!) */
            | CAN_ERR_RESTARTED    /* controller restarted */
        );

        ret = setsockopt(sock_fd, SOL_CAN_RAW, CAN_RAW_ERR_FILTER,
&err_mask, sizeof(err_mask));


AND

        // Write should block, when socketcan's own queue is full.
        // To have this behaviour (and not get error ENOBUFS) set SO_SNDBUF
to its minimum value.
        // See https://rtime.felk.cvut.cz/can/socketcan-qdisc-final.pdf#page=21
        const int sndbuf = 0;
        if (setsockopt(sock_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf,
sizeof(sndbuf)) < 0) {
            std::cerr << "Error setting SO_SNDBUF in setsockopt" <<
std::strerror(errno) << std::endl;
            return -1;
        }