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Diffstat (limited to 'bsps/include/grlib/canbtrs.h')
| -rw-r--r-- | bsps/include/grlib/canbtrs.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/bsps/include/grlib/canbtrs.h b/bsps/include/grlib/canbtrs.h new file mode 100644 index 0000000000..1fbbbfc7f8 --- /dev/null +++ b/bsps/include/grlib/canbtrs.h @@ -0,0 +1,62 @@ +/** + * @file + * @ingroup can + * @brief CAN baud-rate paramter operations for OCCAN/GRCAN/GRCANFD controllers + */ + +/* + * COPYRIGHT (c) 2019. + * Cobham Gaisler AB. + * + * The license and distribution terms for this file may be + * found in the file LICENSE in this distribution or at + * http://www.rtems.org/license/LICENSE. + */ + +#ifndef __GRLIB_CANBTRS_H__ +#define __GRLIB_CANBTRS_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +/* CAN Baud-rate parameters, range of valid parameter values */ +struct grlib_canbtrs_ranges { + unsigned int max_scaler; + char has_bpr; + unsigned char divfactor; + unsigned char min_tseg1; + unsigned char max_tseg1; + unsigned char min_tseg2; + unsigned char max_tseg2; +}; + +struct grlib_canbtrs_timing { + unsigned char scaler; + unsigned char ps1; + unsigned char ps2; + unsigned char rsj; + unsigned char bpr; +}; + +/* Calculate CAN baud-rate generation parameters from requested baud-rate + * + * \param baud The CAN baud rate requested + * \param core_hz Input clock [Hz] to CAN core + * \param sampl_pt CAN sample point in %, 80 means 80% + * \param br CAN Baud-rate parameters limitations + * \param timing result is placed here + */ +int grlib_canbtrs_calc_timing( + unsigned int baud, + unsigned int core_hz, + unsigned int sampl_pt, + struct grlib_canbtrs_ranges *br, + struct grlib_canbtrs_timing *timing + ); + +#ifdef __cplusplus +} +#endif + +#endif |