Nucleo-144 CAN bus example code?

[Dick Lin]

Posted on May 30, 2018 at 21:08

Hi,

I am using STM32L496 with Nucleo-144/STM32CubeMX.

Is there any CAN BUS example with HAL Drivers? I can't even find how to setup the baudrate.

Thanks,

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[Dick Lin]

Posted on May 31, 2018 at 21:36

I found this on the internet for 48 MHz clock. Why the setting is different than what you said?

/* CAN cell init */
CAN_InitStructure.CAN_TTCM = DISABLE;
CAN_InitStructure.CAN_ABOM = DISABLE;
CAN_InitStructure.CAN_AWUM = DISABLE;
CAN_InitStructure.CAN_NART = ENABLE;
CAN_InitStructure.CAN_RFLM = DISABLE;
CAN_InitStructure.CAN_TXFP = ENABLE;
CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;
/* CAN Baudrate = 500kbps (CAN clocked at 48 MHz) */
CAN_InitStructure.CAN_BS1 = CAN_BS1_6tq;
CAN_InitStructure.CAN_BS2 = CAN_BS2_5tq;
CAN_InitStructure.CAN_Prescaler = 16;
CAN_Init(CAN1, &CAN_InitStructure);
// 48Mhz / ( 8 * ( 1 + 6 + 5) ) = 500Kbps
// 48Mhz / 96

[Tesla DeLorean]

Posted on June 20, 2018 at 20:49

Three weeks later...

https://community.st.com/0D50X00009XkYGHSA3

[Dick Lin]

Posted on June 20, 2018 at 21:18

Yeah. First we are using our own dev kit which CANH./L 5V. Then I wasn't get the SystemClock_Config() function correctly.

Then purchase CAN transceiver, enable PEAK termination.

It's painful. 

Now I am moving to flash. Thx