STM32F4 - beide CAN gleichzeitig

[OP (Gast)]

Ich möchte beide CAN-Busse im STM32F446 gleichzeitig nutzen. 
Grundsätzlich funktioniert das auch, ich kann auch auf beiden Senden.
Je nach Interrupt- und Filtereinstellung generiert aber nur einer der 
Busse Interrupts beim Empfangen.
Wo liegt mein Fehler?

Hier der relevante Code:

nvic.c

  NVIC_InitStructure.NVIC_IRQChannel = CAN1_RX0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
  
  NVIC_InitStructure.NVIC_IRQChannel = CAN2_RX0_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

stm32f4xx_it.c

void CAN1_RX0_IRQHandler(void)
{
  CAN_Receive(CAN1, CAN_FIFO0, &RxMessage1);
  //do stuff
}

void CAN2_RX0_IRQHandler(void)
{
  CAN_Receive(CAN2, CAN_FIFO0, &RxMessage2);
  //do stuff
}

can.c

CAN_ITConfig(CAN1, CAN_IT_FMP0, ENABLE);
CAN_ITConfig(CAN2, CAN_IT_FMP0, ENABLE);

    /* CAN filter init */
  CAN_FilterInitStructure.CAN_FilterNumber = 14;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

[OP (Gast)]

Niemand?

[OP (Gast)]

  CAN_FilterInitStructure.CAN_FilterNumber = 0;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO0;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

Muss ich die Filterinitialisierung mehrfach durchführen, für jede 
verwendete Filternummer? Also zb weiter so:

  CAN_FilterInitStructure.CAN_FilterNumber = 14;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_FIFO1;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

Damit hätte ich quasi Filter 0 und 14 konfiguriert für jeweils 1 FIFO, 
und kann dann in den Interrupts aus den jeweiligen FIFOs lesen?

[OP (Gast)]

Hat sich erledigt

[Joe (Gast)]

Es wäre schön wenn du auch für andere die Lösung bereitstellen würdest!