USB2-F-7x01 Full-Speed USB to 1-Port CANBus Adapter Datasheet

Version 1.4

Document Reference No.: CP_000050 Clearance No.: CP#040

Copyright © Connective Peripherals Pte Ltd

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4.1.4 Set Acceptance Filter (M)

Summary

The Acceptance Filter, in conjunction with the Acceptance Mask (m), defines which received messages

(i.e. of a specific ID or range of CAN IDs) will be passed to the USB interface. The Acceptance Filter

value corresponds to a valid CAN ID for either standard or extended CAN messages.

The Set Acceptance Mask (m) command should be executed prior to the Set Acceptance Filter (M)

command.

NOTE: The CAN channel will revert to its prior state after execution. For example if the channel is Open

when this command is executed, the channel will update the setting and return to the Open state.

Definition

Miii<CR> for standard 11-bit CAN messages

Miiiiiiii<CR> for extended 29-bit CAN messages

Parameters

iii = standard 11-bit CAN ID (0x000 through 0x7FF)

iiiiiiii = extended 29-bit CAN ID (0x00000000 through 0x1FFFFFFF)

Default is to pass all frames (Acceptance Filter = 0x7FF for standard messages and 0x1FFFFFFF

for extended messages).

Remarks

Example

M1FF<CR>

Set Acceptance Filter to receive standard messages with the CAN ID of 0x1FF. If used in conjunction

with the Acceptance Mask example above, frames of the range 0x100 through 0x1FF will be passed and

all other CAN IDs blocked.

Return Codes

<CR> = OK

<BELL> = ERROR

4.1.5 Enable Time Stamp (Z)

Summary

Sets or clears time stamp on received frames. This value is persistent in EEPROM across reset or restart.

Four (4) bytes are added to the end of a received frame. This value is a rolling 16-bit counter that

increments once every millisecond and rolls over at 60,000mS (1 minute). Valid hex values are 0x0000

through 0xEA5F.

NOTE: The CAN channel will revert to its prior state after execution. For example if the channel is Open

when this command is executed, the channel will update the setting and return to the Open state.

Definition

Zn<CR>

Parameters

n =

0 = disable time stamp feature