From 366ede9530a637238c1069cd2aa67e76648e8c83 Mon Sep 17 00:00:00 2001 From: wangxiaoxin Date: Thu, 27 Jun 2024 16:26:26 +0800 Subject: [PATCH] add lin status changes the format of the reported frame and add the macros that lin needs Signed-off-by: wangxiaoxin --- include/nuttx/lin.h | 66 ++++++++++++++++++++++++++++++--------------- 1 file changed, 45 insertions(+), 21 deletions(-) diff --git a/include/nuttx/lin.h b/include/nuttx/lin.h index 77dd75a157..d9907e9c92 100644 --- a/include/nuttx/lin.h +++ b/include/nuttx/lin.h @@ -30,6 +30,8 @@ #include #include +#ifdef CONFIG_NET_CAN + /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ @@ -38,37 +40,49 @@ #define LIN_ID_MASK ((1 << LIN_ID_BITS) - 1) #define LIN_ID_MAX LIN_ID_MASK -#define LIN_CTRL_FRAME CAN_EFF_FLAG +#define LIN_CTRL_FLAG CAN_EFF_FLAG /* Describe control information(such as wirte et.) */ +#define LIN_RTR_FLAG CAN_RTR_FLAG /* Describe the direction of sending and receiving */ +#define LIN_ERR_FLAG CAN_ERR_FLAG /* The flag indicate this is LIN err_frame */ -/* When slave response to master, slave node should send frame immediately - * which already be cached in last transmission in case of response interval - * over time; +/* Bit flags on can_frame.types + * + * Use can_frame.types to identify other special frame. + * + * LIN_TCF_FLAG : TxConfirmation message frame. Lower_half use this flag to + * confirm frame-transmit + * + * LIN_EVT_FLAG : Event message frame. Lower_half use this flag to report + * state switch event + * + * LIN_CACHE_RESP_FLAG: When slave response to master, slave node should send + * frame immediately which already be cached in last + * transmission in case of response interval over time. + * + * LIN_CHKSUM_EXT_FLAG: LIN checksum have two types, default type will be + * classic checksum + * + * LIN_SINGLE_RESP_FLAG: Cache LIN frame only work once, then will be cleared */ -#define LIN_CACHE_RESPONSE (1 << (LIN_ID_BITS)) - -/* LIN checksum have two types, default type will be classic checksum */ - -#define LIN_CHECKSUM_EXTENDED (1 << (LIN_ID_BITS + 1)) - -/* Cache LIN frame only work once. then will be clear */ - -#define LIN_SINGLE_RESPONSE (1 << (LIN_ID_BITS + 2)) +#define LIN_TCF_FLAG CAN_TCF_FLAG +#define LIN_EVT_FLAG CAN_EVT_FLAG +#define LIN_CACHE_RESP_FLAG (1 << (CANFD_FLAGS_BITS + 2)) +#define LIN_CHKSUM_EXT_FLAG (1 << (CANFD_FLAGS_BITS + 3)) +#define LIN_SINGLE_RESP_FLAG (1 << (CANFD_FLAGS_BITS + 4)) /* LIN Error Indications ****************************************************/ /* LIN_ERR_FLAG: Used to distinguish it from ordinary frames. - * The error frame consists of err_flag、err_class(defined in data[0]) - * and err_reason(defined in data[1] to data[4]). + * The error frame consists of err_flag（LIN_ERR_FLAG)、err_class + * (defined in data[0]) and err_reason(defined in data[1] to data[4]). * The error frame is described using the following structure: * struct can_frame { * canid_t can_id; * uint8_t can_dlc; - * uint8_t __pad; - * uint8_t __res0; + * uint16_t flags; * uint8_t __res1; * uint8_t data[CAN_MAX_DLEN] __attribute__((aligned(8))); - * }; + * }__attribute__((packed)); * * Error frame description format： * @@ -85,8 +99,6 @@ * define in data[0] ~ data[4] in can_frame. */ -#define LIN_ERR_FLAG CAN_ERR_FLAG /* The flag indicate this is LIN err_frame */ - /* ERR_CLASS in data[0] */ #define LIN_ERR_UNSPEC 0x00 /* Unspecified error */ @@ -124,7 +136,7 @@ #define LIN_ERR_BUS_PID (1 << 0) /* Bit 0: Pid received back is not equal to the pid sent */ #define LIN_ERR_BUS_TXCKSUM (1 << 1) /* Bit 1: Checksum received back is not equal to checksum sent */ #define LIN_ERR_BUS_SYNC (1 << 2) /* Bit 2: Master send sync, but receive back sync is not 0x55 */ -#define LIN_ERR_BUS_DATA (1 << 3) /* Bit 3: Data received back is not equal to the data sent */ +#define LIN_ERR_BUS_DATA (1 << 3) /* Bit 3: Data received back is not equal to the data sent */ /* Data[4] error status of LIN-controller */ @@ -132,6 +144,17 @@ #define LIN_ERR_CRTL_RXOVERFLOW (1 << 0) /* Hardware controller receive overflow */ #define LIN_ERR_CTRL_FRAMEERROR (1 << 1) /* Hardware controller frame error */ +/* LIN States Indications ***************************************************/ + +/* lower_half State switch events are defined in data[0] */ + +#define LIN_EVT_UNSPEC 0x00 /* Unspecified state event */ +#define LIN_EVT_WAKEUP (1 << 0) /* Already send a wake-up command to lin_bus */ +#define LIN_EVT_WAKEUP_PASSIVE (1 << 1) /* Wake up when detecte low level signal of bus a for a period of time(such as 250us-5ms) */ +#define LIN_EVT_SLEEP (1 << 2) /* Send a sleep command(0x3c) to the bus, only Master */ +#define LIN_EVT_SLEEP_PASSIVE (1 << 3) /* Receive a sleep command from bus */ +#define LIN_EVT_SLEEP_IDLE (1 << 4) /* Go to sleep when bus keep in the inactive for a period of time(such as 4s) */ + /**************************************************************************** * Public Function Prototypes ****************************************************************************/ @@ -150,4 +173,5 @@ extern "C" } #endif +#endif /* CONFIG_CAN */ #endif /* __INCLUDE_NUTTX_LIN_H */