cell phone jammer has been effectively divided so that it only interferes the down-link. [Q] CAN beginner friends I should encounter this problem, my understanding is that a node sends a message to the network, all nodes can receive, after receiving the identifier of each node will receive comparison with their own, in line with the only receiver, filters and masks can determine which bits in the identifier comparison, that is some place you can not compare directly involved in receiving, this is useful, for example, 11-bit identifier is not may have used to identify the next crew number, you can not connect so much a network node, 11-bit identifier bit of a waste, we can be up to 3 bits of data sent by the type, set the filter at the receiving point and shielding Comparing node numbers are only part of the first data reception down in the top three is used to determine what data, test results are RXB0SIDH I will be sending the TXB0SIDH modified to determine the maximum three RXB0SIDH received data can be aware of types, these are my days of learning outcomes, we hope that common discussion.
cell phone jammer would not cause any interference to the base station.[Answer] is right. Do not do this if the hardware filtering, you can also use the software to resolve the address, determine the need for processing the received message, but this will increase the CPU overhead, therefore, reasonable to set the hardware The [answer] nn you can set a wait time, since the beginning of sending, the waiting time to the future, canceled. You can send a bit set up, no waiting is sent successfully, shop and go to other things, the program will not die here. The course of cell phone jammer production strictly complied with the ISO9001 quality system.[Q] CAN response is the underlying protocol? Set up to send bit. Sender CAN controller itself is not to wait for the receiver of the controller response. . CAN I ask is that the response mechanism. Is not its underlying protocol. . If you receive the answer, CAN will die there? Problem has been resolved. After each time I send, and then the next software reset of the CAN. [Answer] The general practice is: nnn filled data set from the transmit bit; to do other things, to be sent before the next record, to check whether sending the last time; if the sum is not transmitted, then the decision. cell phone jammer works steadily and reliably. How to deal with: cancel sending, or wait. How to send more than eight bytes [Q] now need to work together to send more than eight bytes of data. . But can only send a maximum of SJA1000, eight bytes of data. How can one send more than eight bytes of data [Answer] The fragmentation / reassembly protocol [Q] can specifically do?
For example: set a receive filter register, receive mask register, then the combination will be rejected for all but the corresponding CAN frame identifier, because the shielding device sets the second bit (0) all identifier bits other than to strictly match (value consistent with the filter), the first two filter values and the second received the CAN identifier value are the same can. Different chip operating mode filter mask register is not consistent, at least I used AT90CAN128 and MCP2515 great difference, but the same principle.
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