Hello NXP team!
What are the steps to configure FlexCAN into Legacy RxFIFO mode ?
I have done so far:
1. Configure PIN from pin tool
2. Configure FlexCAN3 + IntCtrl from peripheral tool
In the code....
3. Init clocks
4. Init interrupt controller and FlexCAN3 interrupt +set IRQ priority
5. Init FlexCAN3 peripheral (FlexCAN_Ip_Init)
6. Setup ID filter Table for RxFIFO (FlexCAN_Ip_ConfigRxFifo)
7. Put FlexCAN peripheral into Start Mode (FlexCAN_Ip_SetStartMode)
8. Enter a while(1) loop and wait for IRQ of FlexCAN.
9. I'm sending a packet via my PC by using a usb to can controller of PEAK-System.
10. I get a message that the bus is heavy and I don't see anything changing until I stop the communication myself.
I've studied the RM of S32K344 regarding FlexCAN and I have configured in the past the Enchanced RxFIFO for FlexCAN0 but it is not supported for FlexCAN1,2 and 3 so I need to setup the Legacy RxFIFO.
a. I've sent a message with the same ID as the ID used in the ID Filter table.
b. My bitrate is 500Kb in both devices (my MCU and PCAN controller).
c.FlexCAN clock is 16MHz
d. My configurations are those:
.cfg =
{
//CAN periph configs
.flexcanMode = FLEXCAN_NORMAL_MODE,
.ctrlOptions = (FLEXCAN_IP_PROTOCOL_EXCEPTION_U32),
.fd_enable = false,
.enhCbtEnable = false,
.bitRateSwitch = false,
.bitrate = {2, 2, 3, 4, 2},
.bitrate_cbt = {2, 2, 3, 4, 2},
//CAN IRQ callback pointers
.Callback = flexcan3_cb,
.ErrorCallback = NULL_PTR,
// MailBox configs
.max_num_mb = 32,
.payload = {FLEXCAN_PAYLOAD_SIZE_8, FLEXCAN_PAYLOAD_SIZE_8, FLEXCAN_PAYLOAD_SIZE_8},
//RxFIFO configs
.is_rx_fifo_needed = true ,
.num_id_filters = FLEXCAN_RX_FIFO_ID_FILTERS_8,
.transfer_type = FLEXCAN_RXFIFO_USING_INTERRUPTS,
//Enchanced RxFIFO configs
.is_enhanced_rx_fifo_needed = false,
.num_enhanced_std_id_filters = 0,
.num_enhanced_ext_id_filters = 0,
.num_enhanced_watermark = 0,
},
Kind regards,
kyf
