Re: [PATCH 1/2] canbusload: Add exact CAN frame length calculation (including bitstuffing)

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 01/30/2014 02:38 PM, Michal Sojka wrote:

> diff --git a/canframelen.h b/canframelen.h
> new file mode 100644
> index 0000000..225bc09
> --- /dev/null
> +++ b/canframelen.h
> @@ -0,0 +1,35 @@
> +#ifndef CANFRAMELEN_H
> +#define CANFRAMELEN_H
> +
> +#include <linux/can.h>
> +
> +/**
> + * Frame length calculation modes.
> + *
> + * CFL_WORSTCASE corresponds to Ken Tindells *worst* case calculation
> + * for stuff-bits (see "Guaranteeing Message Latencies on Controller
> + * Area Network" 1st ICC'94) the needed bits on the wire can be
> + * calculated as:
> + *
> + * (34 + 8n)/5 + 47 + 8n for SFF frames (11 bit CAN-ID) => (269 + 48n)/5
> + * (54 + 8n)/5 + 67 + 8n for EFF frames (29 bit CAN-ID) => (389 + 48n)/5
> + *
> + * while 'n' is the data length code (number of payload bytes)
> + *
> + */

Can you please post a patch against the new master and add a license
header to this file.

Tnx,
Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
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