STM32F769I EVAL CAN problems
Hello,
we are trying to listen to can messages with our evaluation board.
We are using a PCAN-USB adapter to play a can log to our eval board.
When starting the PC program it says that there is no can buffer detected. We assume that somehow our CAN Transceiver is not working or properly configured.
Following is our CAN1 initialization.
With this configuration we reach 500kbit/s baud rate at 216Mhz, which we are aiming for.
hcan1.Instance = CAN1;
hcan1.Init.Prescaler = 27;
hcan1.Init.Mode = CAN_MODE_SILENT;
hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_1TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = DISABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = DISABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
{
Error_Handler();
}Since we're trying to test the communication we have not yet configured an specific filter. We are aiming to receive all messages to make sure that the connection is established.
CAN_FilterTypeDef sFilterConfig;
//Test-Filter passing all values through
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterBank = 0;
sFilterConfig.FilterIdHigh = 0x0000;
sFilterConfig.FilterIdLow = 0x0000;
sFilterConfig.FilterMaskIdHigh = 0x0000;
sFilterConfig.FilterMaskIdLow = 0x0000;
sFilterConfig.FilterFIFOAssignment = CAN_RX_FIFO0;
sFilterConfig.FilterActivation = ENABLE;
//Filter setzen
HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig);
//Can Starten
HAL_CAN_Start(&hcan1);
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING)
!= HAL_OK) {
Error_Handler();
}
//NVIC Interrupts aktivieren
HAL_NVIC_SetPriority(CAN1_RX0_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(CAN1_RX0_IRQn);Our GPIOs are configured in the .IOC
We are expecting the HAL_CAN_RxFifo0MsgPendingCallback Method to be called after a Message is received an an Interrupt was thrown.
void HAL_CAN_RxFifo0MsgPendingCallback(CAN_HandleTypeDef *hcan)
{
can_datacheck = 1;
}We configured our Jumper Positions following:
JP19 - 1 & 2 for high speed mode
JP18 fitted
JP14 fitted
Is there anything we are missing out on ?
We can not figure out our problem.
Thank you very much for any help,
regards Luis