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  1. D

    Interface GSM and GPS both with 8051 using Tx & Rx

    yes by using appropriate delay we can catch every bit from gsm and gps modem by making any GPIO pin of mcu as tx and rx pin.
  2. D

    [SOLVED] bitrate of nodes in can communication

    dear Tanmay, kindly read my above comment before you reply anything, as i have written that if ack error and crc error detected on the same frame then error frame will be generated due to ack error because it is mentioned in can part A and part B document (please refer page 25 under error...
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    Interface GSM and GPS both with 8051 using Tx & Rx

    no need to use any mux just simply connect gsm modem to mcu i/o pins and by using carry bit recieve every bit and by using appropriate delay u can recieve the data without using the tx and rx pin.
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    error frame in can communication

    yes i have to check bit by bit but can you please expalin about error frame and overload frame , how to differentiate them....
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    [SOLVED] bitrate of nodes in can communication

    dear emb4u, sir you are right due to different speed crc in both side will not match and crc error will generate , but also ack error will generate and the error frame will generate only due to ack error not for crc error , as per datasheet when a crc error occurs then the error flag will...
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    error frame in can communication

    i am doing can communication using at89s8252,mcp2515,pca82c250..actually i donot have any can tool to visualize the bits and i have a doubt that there are how many bits in active error frame and passive error frame. please suggest and explain .also please suggest how a node on can bus...
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    [SOLVED] can camunication using MCP2515 AND AT89S8252

    dear, embd4u, as per your answer i think mcp2515 handles the busoff condition and its not an overhead for mcu to reset the can controller . so we can say that mcp2515 is having self reset ..right..?..please suggest
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    RS232 Port Communication 89c51 to PC

    here TI must be clear .......that is TI = 0....
  9. D

    [SOLVED] C typedef can't understand

    typedef facility allows us to define a new nam for an existing data type...... here in the above expression When this exception handler function is called, the parameter Data pointer contains the same value as you provided when you registered the handler.
  10. D

    [SOLVED] bitrate of nodes in can communication

    thanx for the above suggestion sir.....kindly please explain your answer...
  11. D

    [SOLVED] bitrate of nodes in can communication

    hi , i am doing can communication using mcp2515 can controller,at89s8252 mcu and pca82c250 can transceiver... i have a doubt regarding the speed of nodes....if we have two nodes with different speed (bit rate ) on a can bus ..then what will happen will the communication happen smoothly or any...
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    [SOLVED] arbitration issues in can communication

    how it is possible that two data frames will be on bus till complete tx.....that means if two nodes are trying to access one same node by sending their data frames (both the data frames are identical as i said above) ..then the 3rd node will receive both the frames ...how is it possible...
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    [SOLVED] arbitration issues in can communication

    dear ftsolution , sir actually i asked that if two node are with same identifier that is the address of device as u said and the data field are same that means two identical data frames ...it means they have equal number of dominant and recessive bits then how the arbitration will occurre and...
  14. D

    [SOLVED] arbitration issues in can communication

    so who will loose arbitration and how....because as i said that both the frame having same bits upto the data field means the identifier and datas are same how the arbitration occures please explain it sir..........
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    [SOLVED] arbitration issues in can communication

    i am doing can communication using at89s8252 mcu, mcp2515 can controller, pca82c250 can tranciever..i have doubt that if on a can bus if two data frames with same identifier and same data field will arise at the same time ...then will be their any arbitration occured and if yes then who will win...
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    [SOLVED] busoff issuues in can communication

    dear ftsolutions sir, i am using can controller mcp2515 with at89s8252 mcu.....if i will not reset by sending comand from my mcu then is it possible that any bus-off node will automatically come out from its busoff state to original state by monitoring 128*11 recessive bits...if yes then please...
  17. D

    [SOLVED] busoff issuues in can communication

    so if after a node goes to bus off if another node will start its transmission and bus remains busy and never goes to ideal state then that bus-off node will never come back to its original position....i think it is a big problem then in such case that node will never able to rejoin to the...
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    [SOLVED] busoff issuues in can communication

    yes sir actually i am asking about the reset part....how the node will get reset .....i read from document that node will get reset after monitoring about 128*11 recessive bits ...but got confused in that part that who will send those bit and how ...please guide me thank you
  19. D

    [SOLVED] busoff issuues in can communication

    i am doing can protocol using at89s8252 mcu, ,mcp2515 and pca82c250....i have a doubt regarding bus-off condition in can...actually when a node goes bus off then how it get recoverd...please suggest here..thank you

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