[STM32F4 Disco] Connect CAN 1 RX to EXTI 0

[nikofionn]

Posted on July 23, 2014 at 22:35The original post was too long to process during our migration. Please click on the attachment to read the original post.

[Tesla DeLorean]

Posted on July 23, 2014 at 22:40

This forum software does not support posting from mobile devices (Phones, Tablets).

Perhaps if it's connected to PD0?

[nikofionn]

Posted on July 24, 2014 at 10:32

****update****

I just had a quick chat with an STM engineer, who told me, that what I am trying to do, will not work... There is no way to connect the interrupt behind the CAN filter to an EXTI line, because they are not working in STOP-Mode. So, there are two ways left to get a quick solution (without changing hardware): - Enter STOP-Mode via WFE - Wait for event. This would wake up the MCU without an ISR, which would be fine for now. - Enable the EXTI line connected to RX-Pin just before entering STOP-Mode and disabling the EXTI line again after wake up. Otherwise an Interrupt would occur with any CAN message, which is not my aim. I will try to get the STOP-Mode working using the WFE - sequence. Can anybody give me some hints? I will post my code later on 😉 ********* Good morning clive1, I reworked my posting, as I did not know, thath mobile devices are not supported 🙂 Kind regards, Niko

[Tesla DeLorean]

Posted on July 24, 2014 at 16:18

Your EXTI configuration is wrong

// EXT_INT0 connect to Pin0 [GPIOD] = RX-PIN SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, GPIO_Pin_0); Should be // EXT_INT0 connect to Pin PD0 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOD, EXTI_PinSource0);  Whether the state of the pin is usable is debatable, not sure the if you want an Event, if you configured an Interrupt. I'd go for WFI