Send Fail about arduino-stm32-can HOT 16 CLOSED

I solved the problems they work now thank you for your help. I used the arduino codes you suggested and changed the clock settings. It works perfectly now.

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Yes, I used USB as a serial port

from arduino-stm32-can.

It is work fine with stm32F405/406.

https://github.com/nopnop2002/Arduino-STM32-CAN/tree/master/stm32f407

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I used your code but I am getting send fail on my screen. I tried the things you said and they didnt seem to work for me. My two arduinos talk to each other just fine but when I add stm32 with your code my receiver doesnt get anything and yours say send fail.

from arduino-stm32-can.

If the transmission fails, these are the possible causes.

There is no receiving app on CanBus.
The speed does not match the receiver.
There is no terminating resistor on the CanBus.
There are three terminating resistors on the CanBus.
The resistance value of the terminating resistor is incorrect.
Stub length in CAN bus is too long.
Though the ISO11898 Standard specifies a maximum bus length of 40m and maximum stub length of 0.3m at 1Mbps. See here.

from arduino-stm32-can.

Your CAN-BUS may be affected by noise.

If you review the wiring of CAN-BUS, it may work.

It occurs when the wire cable is thin or wire cable is crossing.
It is preferable to use twisted wire.

I changed the wire cable to twisted wire. Fixed.

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I am going to try the cables. Do you have the code for arduino receiver. Did you share it somewhere? Maybe I can try that.

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And I tried the code you said it works perfectly. My UART-USB converter connection is fine.

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My problem isnt solved. Only Serial connection is ok. But communication problem continious.

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I really need to try the arduino code you used.

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I really need to try the arduino code you used.

Read carefully.

https://github.com/nopnop2002/Arduino-STM32-CAN/blob/master/README.md

README say;
Communication with Arduino-UNO
You can use this library.

If you search the Internet, you will find a lot of sample code.

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Sir, I am trying to send data from Mega and Stm32 then read it from Nano. Mega and Nano works perfectly together but when I connect Stm32 with your code. Nano stops receiving and Stm32 says send fail. I connected resistors and everyting. I am asking if you shared the code that you used in Arduino to try it. I have read the README.

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I am asking if you shared the code that you used in Arduino to try it.

https://github.com/coryjfowler/MCP_CAN_lib

Mega and Nano works perfectly together but when I connect Stm32 with your code. Nano stops receiving and Stm32 says send fail.

simply a wire cable or terminating resistor or bitrate or connection problem.

Is the STM32 BitRate correct?

Are STM32 wires short enough?

Are the STM32 wires well shielded?

Are all wires adequately shielded?

Are the terminating resistors really on both ends?

I changed the wire cable to twisted wire. It Fixed.

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1000KBPS is susceptible to noise.

Try it at 250KBPS or 500KBPS.

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Mega and Nano works perfectly together but when I connect Stm32 with your code. Nano stops receiving and Stm32 says send fail.

Mega and Nano are working perfectly, what happens when you add STM32 to CAN-BUS?

Connect stm32 to tranceiver.
Add tranceiver to CAN-BUS.
But without turning on the STM32.

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I found that:

STM32F405/407 can use a Virtual COM port.
If you enable Virtual COM port, you can use the USB port as a serial port.

With STM32F103, Basic Extended CAN(BxCan) and USB Support can not be used at the same time.

With STM32F405/407, Basic Extended CAN(BxCan) and USB Support can be used at the same time.

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