stm32f042 + can bus

[tomas mainzer]

Dobry den,
nemate nekdo prosim funkcni priklad pro STM32F042 a can bus?
Vychazim z prikladu pro STM32f072  - ake nedari se mi ani odeslat CAN
packet - uz jsem vyzkousel priklady (puvodne pro STM32F072) pro SPL
knihovny (to prekladam v embitz) i pro CubeMX (to prekladam v Atollic
TRUEstudiu) a nedokazu prijit na to kde je zakopan pes.
Uvitam jakekoliv tipy.

Nize je relevantni vysek programu pro SPL (CAN je na pinech PA11,PA12):


 GPIO_InitTypeDef  GPIO_InitStructure;
  NVIC_InitTypeDef  NVIC_InitStructure;
  CAN_InitTypeDef   CAN_InitStructure;
  CAN_FilterInitTypeDef  CAN_FilterInitStructure;


  /* CAN GPIOs configuration
**************************************************/

  /* Enable GPIO clock */
  //RCC_AHBPeriphClockCmd(CAN_GPIO_CLK, ENABLE);
  RCC_AHBPeriphClockCmd(RCC_APB1Periph_CAN, ENABLE);
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

  /* Connect CAN pins to AF7 */
  GPIO_PinAFConfig(CAN_GPIO_PORT, CAN_RX_SOURCE, CAN_AF_PORT);
  GPIO_PinAFConfig(CAN_GPIO_PORT, CAN_TX_SOURCE, CAN_AF_PORT);

  /* Configure CAN RX and TX pins */
  GPIO_InitStructure.GPIO_Pin = CAN_RX_PIN | CAN_TX_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
  GPIO_Init(CAN_GPIO_PORT, &GPIO_InitStructure);

  /* CAN NVIC  configuration
**************************************************/
  NVIC_InitStructure.NVIC_IRQChannel = CEC_CAN_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /* CAN configuration
********************************************************/
  /* Enable CAN clock */
  RCC_APB1PeriphClockCmd(CAN_CLK, ENABLE);

  /* CAN register init */
  CAN_DeInit(CANx);
  CAN_StructInit(&CAN_InitStructure);

  /* CAN cell init */
  CAN_InitStructure.CAN_TTCM = DISABLE;
  CAN_InitStructure.CAN_ABOM = DISABLE;
  CAN_InitStructure.CAN_AWUM = DISABLE;
  CAN_InitStructure.CAN_NART = DISABLE;
  CAN_InitStructure.CAN_RFLM = DISABLE;//ENABLE;
  CAN_InitStructure.CAN_TXFP = DISABLE;//ENABLE;
  CAN_InitStructure.CAN_Mode = CAN_Mode_Normal;
  CAN_InitStructure.CAN_SJW = CAN_SJW_1tq;

  /* CAN Baudrate = 1MBps (CAN clocked at 36 MHz) */
  CAN_InitStructure.CAN_BS1 = CAN_BS1_9tq;
  CAN_InitStructure.CAN_BS2 = CAN_BS2_8tq;
  CAN_InitStructure.CAN_Prescaler = 2;
  CAN_Init(CANx, &CAN_InitStructure);

  /* CAN filter init "FIFO0" */
  CAN_FilterInitStructure.CAN_FilterNumber = 0;
  CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdList;
  CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_32bit;
  CAN_FilterInitStructure.CAN_FilterIdHigh = 0x6420;
  CAN_FilterInitStructure.CAN_FilterIdLow = 0x2461;
  CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0x0000;
  CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0x0000;
  CAN_FilterInitStructure.CAN_FilterFIFOAssignment = 0;
  CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;
  CAN_FilterInit(&CAN_FilterInitStructure);

  /* Transmit Structure preparation */
  TxMessage.StdId = 0x321;
  TxMessage.ExtId = 0x00;
  TxMessage.RTR = CAN_RTR_DATA;
  TxMessage.IDE = CAN_ID_STD;
  TxMessage.DLC = 1;

  /* Enable FIFO 0 full Interrupt */
  //CAN_ITConfig(CANx, CAN_IT_FF0, ENABLE);
  CAN_ITConfig(CANx, CAN_IT_FMP0, ENABLE);

...

TxMessage.Data[0] = (uint8_t)(tick);
CAN_Transmit(CANx, &TxMessage);


Dekuji. TM.
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