CAN RX Fifo Format C set up

sophie-wang — Tue, 17 May 2022 09:50:11 GMT

Hello NXP Expert,

I want use flexcan fifo( id filter with format c ) receive can message，I set id filter in the following code:

uint32_t rxFifoFilter[] = {FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_HIGH(0x433) | \

FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_HIGH(0x512) | \

FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_MID_LOW(0x654) | \

FLEXCAN_RX_FIFO_STD_FILTER_TYPE_C_LOW(0x332) \

};

flexcan_rx_fifo_config_t rxFifoConfig;

rxFifoConfig.idFilterTable = rxFifoFilter;

rxFifoConfig.idFilterType = kFLEXCAN_RxFifoFilterTypeC;

rxFifoConfig.idFilterNum = sizeof(rxFifoFilter) / sizeof(rxFifoFilter[0]);

rxFifoConfig.priority = kFLEXCAN_RxFifoPrioHigh;

FLEXCAN_SetRxFifoConfig(FLEXCAN1, &rxFifoConfig, true);

I think the CAN message ID I received should be 0x430~0x437, 0x510~0x517, 0x650~0x657，0x330~0x337, but the CAN Message ID I received is out of this range(0x30~0x37, 0x1F8~0x1FF, 0x230~0x237, 0x330~0x337, 0x3F8~0x3FF, 0x430~0x437, 0x510~0x517, 0x5F8~0x5FF, 0x630~0x637, 0x650~0x657, 0x7F8~0x7FF),

Why did I receive an out-of-range ID?

Can you tell me how Fifo with ID Filter format C matches received ids?

What should I do if I want to use Fifo ID filters together with individmasks?

topic CAN RX Fifo Format C set up in i.MX Processors

CAN RX Fifo Format C set up