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CAN: Define IOCTL commands to get and set the bit timing values

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This commit is contained in:
Gregory Nutt 2015-08-18 11:21:01 -06:00
parent 505d5f8103
commit 28853e5932
2 changed files with 53 additions and 10 deletions
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2
arch

@ -1 +1 @@
Subproject commit c4e2c4ec83f421469a3ef3f355fd56317e0ac595
Subproject commit fba93b8a0fa0176c2df08835677e6f85adf75f4f

61
include/nuttx/can.h
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@ -106,7 +106,7 @@
* Returned Value: A non-negative filter ID is returned on success.
* Otherwise -1 (ERROR) is returned with the errno
* variable set to indicate the nature of the error.
* Dependencies: Requires CONFIG_CAN_EXID *not* defined
* Dependencies: None
*
* CANIOC_ADD_EXTFILTER:
* Description: Add an address filter for a extended 29 bit address.
@ -114,7 +114,7 @@
* Returned Value: A non-negative filter ID is returned on success.
* Otherwise -1 (ERROR) is returned with the errno
* variable set to indicate the nature of the error.
* Dependencies: Requires CONFIG_CAN_EXID=y
* Dependencies: Requires CONFIG_CAN_EXTID=y
*
* CANIOC_DEL_STDFILTER:
* Description: Remove an address filter for a standard 11 bit address.
@ -123,7 +123,7 @@
* Returned Value: Zero (OK) is returned on success. Otherwise -1 (ERROR)
* is returned with the errno variable set to indicate the
* nature of the error.
* Dependencies: Requires CONFIG_CAN_EXID *not* defined
* Dependencies: None
*
* CANIOC_DEL_EXTFILTER:
* Description: Remove an address filter for a standard 29 bit address.
@ -132,20 +132,42 @@
* Returned Value: Zero (OK) is returned on success. Otherwise -1 (ERROR)
* is returned with the errno variable set to indicate the
* nature of the error.
* Dependencies: Requires CONFIG_CAN_EXID=y
* Dependencies: Requires CONFIG_CAN_EXTID=y
*
* CANIOC_GET_BITTIMING:
* Description: Return the current bit timing settings
* Argument: A pointer to a write-able instance of struct
* canioc_bittiming_s in which current bit timing values
* will be returned.
* Returned Value: Zero (OK) is returned on success. Otherwise -1 (ERROR)
* is returned with the errno variable set to indicate the
* nature of the error.
* Dependencies: None
*
* CANIOC_SET_BITTIMING:
* Description: Set new current bit timing values
* Argument: A pointer to a read-able instance of struct
* canioc_bittiming_s in which the new bit timing values
* are provided.
* Returned Value: Zero (OK) is returned on success. Otherwise -1 (ERROR)
* is returned with the errno variable set to indicate the
* nature of the error.
* Dependencies: None
*/
#define CANIOC_RTR _CANIOC(1)
#define CANIOC_ADD_STDFILTER _CANIOC(2)
#define CANIOC_ADD_EXTFILTER _CANIOC(3)
#define CANIOC_DEL_STDFILTER _CANIOC(4)
#define CANIOC_DEL_EXTFILTER _CANIOC(5)
#define CANIOC_GET_BITTIMING _CANIOC(2)
#define CANIOC_SET_BITTIMING _CANIOC(3)
#define CANIOC_ADD_STDFILTER _CANIOC(4)
#define CANIOC_ADD_EXTFILTER _CANIOC(5)
#define CANIOC_DEL_STDFILTER _CANIOC(6)
#define CANIOC_DEL_EXTFILTER _CANIOC(7)
/* CANIOC_USER: Device specific ioctl calls can be supported with cmds greater
* than this value
*/
#define CANIOC_USER _CANIOC(6)
#define CANIOC_USER _CANIOC(8)
/* Convenience macros ***************************************************************/
@ -390,6 +412,7 @@ struct can_dev_s
};
/* Structures used with ioctl calls */
/* CANIOC_RTR: */
struct canioc_rtr_s
{
@ -397,7 +420,25 @@ struct canioc_rtr_s
FAR struct can_msg_s *ci_msg; /* The location to return the RTR response */
};
/* CANIOC_GET_BITTIMING/CANIOC_SET_BITTIMING: */
/* Bit time = Tquanta * (Sync_Seg + Prop_Seq + Phase_Seg1 + Phase_Seg2)
* = Tquanta * (TSEG1 + TSEG2 + 1)
* Where
* TSEG1 = Prop_Seq + Phase_Seg1
* TSEG2 = Phase_Seg2
*/
struct canioc_bittiming_s
{
uint32_t bt_baud; /* Bit rate = 1 / bit time */
uint8_t bt_tseg1; /* TSEG1 in time quanta */
uint8_t bt_tseg2; /* TSEG2 in time quanta */
uint8_t bt_sjw; /* Synchronization Jump Width in time quanta */
};
#ifdef CONFIG_CAN_EXTID
/* CANIOC_ADD_EXTFILTER: */
struct canioc_extfilter_s
{
uint32_t xf_id1; /* 29-bit ID. For dual match or for the
@ -409,6 +450,8 @@ struct canioc_extfilter_s
};
#endif
/* CANIOC_ADD_STDFILTER: */
struct canioc_stdfilter_s
{
uint16_t sf_id1; /* 11-bit ID. For dual match or for the