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pazi88 / STM32_CAN

CAN bus Library for Arduino STM32
GNU General Public License v3.0
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Extended identifier #3

Closed ru3dnw closed 1 year ago

ru3dnw commented 1 year ago

Good afternoon! Please tell me how, using your library, to transmit /receive CAN messages with an extended identifier? What settings do I need to work with the extended identifier? Thank you very much in advance!

pazi88 commented 1 year ago

Hi!

I think it should work as is. There is Boolean showing if id is extended. Though I haven't tested that, because I haven't needed that on my projects. I need to test/verify that when I have time.

ru3dnw commented 1 year ago

I conducted a simple experiment - I took your "Write" example, changed their ID to 0x1FFFFFFF (29 bits). An oscilloscope with CAN decoding reads 0x7FF (11 bits). Is it possible to forcibly assign "msg.flags.extended ==1"? And how to do it?

pazi88 commented 1 year ago

I conducted a simple experiment - I took your "Write" example, changed their ID to 0x1FFFFFFF (29 bits). An oscilloscope with CAN decoding reads 0x7FF (11 bits). Is it possible to forcibly assign "msg.flags.extended ==1"? And how to do it?

Oh yes you are right. You need to add "CAN_tx_msg.flags.extended = 1" to the struct in the write.ino, in addition to the longer ID to make it work as extended." By default it's 0 if not set separately.

Anyways I'll need to check the extended identifiers myself too to make sure those work. Good reminder.

ru3dnw commented 1 year ago

Thanks! So it worked. True, I had to write "CAN_TX_msg.flags.extended = 1" in the sketch, although in the library the message flag is called as you suggested - "CAN_tx_msg.flags.extended = 1". Please add examples with the reception and transmission of "extended ID"

pazi88 commented 1 year ago

Thanks! So it worked. True, I had to write "CAN_TX_msg.flags.extended = 1" in the sketch, although in the library the message flag is called as you suggested - "CAN_tx_msg.flags.extended = 1". Please add examples with the reception and transmission of "extended ID"

Yes, I tested that too and it works. I'll update the examples.

ru3dnw commented 1 year ago

Thanks!