dll.h

Definitions of low-level CAN DLL interface.

int can_dll_init(void)

Initialize the CAN DLL.

Return values

• 0 on success

int can_dll_register_candev(device.h::candev_dev_t * candev)

Register a CAN device into the DLL.

This function must be called by the device thread to register the device into the DLL

Parameters

candev:the candev to register

Return values

• interface number on success
• -ENODEV if ifnum is invalid

int can_dll_dispatch_rx_frame(struct can_frame * frame, kernel_types.h::kernel_pid_t pid)

Dispatch a received frame.

This function is used to send a message to the DLL thread when a frame is received from the device identified by its pid

Parameters

frame:the received frame pid:the pid of the receiver device

Return values

• 0 on success
• -ENOMEM if the message can not be sent

int can_dll_dispatch_tx_conf(can_pkt_t * pkt)

Dispatch a tx confirmation.

This function is used to send a message to the sender thread when the pkt has been sent correctly.

Parameters

pkt:the pkt which has been sent

Return values

• 0 on success
• -ENOMEM if the message can not be sent

int can_dll_dispatch_tx_error(can_pkt_t * pkt)

Dispatch a tx error.

This function is used to send a message to the sender thread when the pkt has not been sent correctly

Parameters

pkt:the pkt which has not been sent correctly

Return values

• 0 on success
• -ENOMEM if the message can not be sent

int can_dll_dispatch_bus_off(kernel_types.h::kernel_pid_t pid)

Dispatch RX error from a device.

Dispatch RX error from a device to receivers threads which have subscribed to frames on that interface

Parameters

pid:the device thread pid

Return values

• 0 on success