use dual CAN on stm32f105,can2 can not send

55722827 · ‎2010-07-22

Posted on July 22, 2010 at 09:50

Tesla DeLorean · ‎2011-05-17

Posted on May 17, 2011 at 13:59

>>The problem is not CAN2, but CAN1. If the interrupt CAN1_RX0_IRQn is enabled, the microcontroller hangs up some cycles after the reception of a CAN message.

I'm not a CAN guy, but the classic hang up issue with interrupts on the STM32 (M3/NVIC) is that if you fail to clear all the pending interrupts it will tail-chain back into your IRQ code in a tight circle, and no user space code will run.

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cb · ‎2011-05-17

Posted on May 17, 2011 at 13:59

Ok, I got it: In the start-up code, I used the wrong name for the interrupt handler,

USB_LP_CAN1_RX0_IRQHandler

instead of

CAN1_RX0_IRQHandler.

Now it works fine.