topic Re: S32146 CAN FD issue in S32K

S32146 CAN FD issue

chandan_uv — Fri, 20 Oct 2023 10:24:50 GMT

Hello, I want to CAN0 of S32146 in CAN-FD mode. Initially I am using CAN0 as CAN 2.0 and working fine. But when I am using code in S32146, getting stuff error. I just modified the .fd enable, . payload and .data_length. Below is the code

status_t host_can_init(void) { status_t ret = STATUS_SUCCESS; flexcan_user_config_t can_500kbps_init_cfg = { .fd_enable =true, .pe_clock = FLEXCAN_CLK_SOURCE_PERIPH, .max_num_mb = 4, //8, .num_id_filters = FLEXCAN_RX_FIFO_ID_FILTERS_8, .is_rx_fifo_needed = false, .flexcanMode = FLEXCAN_NORMAL_MODE, .payload = FLEXCAN_PAYLOAD_SIZE_64 , //FLEXCAN_PAYLOAD_SIZE_8, .bitrate = { .propSeg = 3U, .phaseSeg1 = 10U, .phaseSeg2 = 7U, .preDivider = 9U, .rJumpwidth = 1U }, .bitrate_cbt = { .propSeg = 3U, .phaseSeg1 = 10U, .phaseSeg2 = 7U, .preDivider = 9U, .rJumpwidth = 1U }, /* .bitrate = { .propSeg = 3U, .phaseSeg1 = 1U, .phaseSeg2 = 2U, .preDivider = 3U, .rJumpwidth = 1U }, .bitrate_cbt = { .propSeg = 3U, .phaseSeg1 = 1U, .phaseSeg2 = 2U, .preDivider = 3U, .rJumpwidth = 1U }, */ .transfer_type = FLEXCAN_RXFIFO_USING_INTERRUPTS, .rxFifoDMAChannel = 0, }; FLEXCAN_DRV_Deinit(HOST_CAN_INST); /* CAN interface initialization */ ret = FLEXCAN_DRV_Init(HOST_CAN_INST, &host_can_state, &can_500kbps_init_cfg); return ret; } void can_if_init_host (void) { flexcan_data_info_t data_info = { .data_length = 64U, .msg_id_type = FLEXCAN_MSG_ID_STD, .fd_enable = true, .enable_brs = false, .fd_padding = 0U }; DEV_ASSERT(FLEXCAN_DRV_ConfigRxMb(HOST_CAN_INST, HOST_RX_MBX, &data_info, RX_HOST_MSG_ID) == STATUS_SUCCESS ); FLEXCAN_DRV_SetRxMbGlobalMask(HOST_CAN_INST, FLEXCAN_MSG_ID_STD, RX_HOST_MSG_ID); DEV_ASSERT(FLEXCAN_DRV_SetRxIndividualMask(HOST_CAN_INST, FLEXCAN_MSG_ID_STD, HOST_RX_MBX, RX_HOST_MSG_ID) == STATUS_SUCCESS ); } status_t can_send(uint8_t instance, uint8_t mb_idx, uint8_t *tx_data, uint32_t len, uint32_t msg_id, flexcan_msgbuff_id_type_t id_type) { status_t send_status = STATUS_SUCCESS; //bool sucess = false; flexcan_data_info_t txdata_info = { .data_length = len, .msg_id_type = id_type, .enable_brs = false, .fd_enable = false, .fd_padding = 0U, .is_remote = false }; if(instance == HOST_CAN_INST){ txdata_info.fd_enable = true; } if( FLEXCAN_DRV_GetTransferStatus(instance, mb_idx) != STATUS_BUSY ){ /* Configure TX message buffer with index TX_MBX and msg_id*/ FLEXCAN_DRV_ConfigTxMb(instance, mb_idx, &txdata_info, msg_id); /* Start transimitting data */ send_status = FLEXCAN_DRV_Send(instance, mb_idx, &txdata_info, msg_id, tx_data); } return send_status; }

Re: S32146 CAN FD issue

chandan_uv — Tue, 24 Oct 2023 07:32:01 GMT

Updated CAN bit rate configuration as below, still similar issue

.bitrate = {
.propSeg = 4U,
.phaseSeg1 = 7U,
.phaseSeg2 = 1U,
.preDivider = 9U,
.rJumpwidth = 1U
},
.bitrate_cbt = {
.propSeg = 4U,
.phaseSeg1 = 7U,
.phaseSeg2 = 1U,
.preDivider = 9U,
.rJumpwidth = 1U
},

Re: S32146 CAN FD issue

Senlent — Tue, 24 Oct 2023 09:54:44 GMT

Hi@chandan_uv

If possible, please provide the entire project and I will test it for you.

Re: S32146 CAN FD issue

chandan_uv — Tue, 24 Oct 2023 09:59:21 GMT

Its not possible for me to share as shared code is a part of project.

Re: S32146 CAN FD issue

Senlent — Tue, 24 Oct 2023 10:14:14 GMT

Hi@chandan_uv

the bitrate configuration is not right from your description.

have a try below setting

and i didn't find any more issues in the picture you provided.

if still have issues,please provided the demo code,

Re: S32146 CAN FD issue

chandan_uv — Tue, 24 Oct 2023 10:26:29 GMT

HI @Senlent, Clock is 80MHZ for me and below are the bit rate configuration

.bitrate = {
.propSeg = 4U,
.phaseSeg1 = 7U,
.phaseSeg2 = 1U,
.preDivider = 9U,
.rJumpwidth = 1U
},
.bitrate_cbt = {
.propSeg = 4U,
.phaseSeg1 = 7U,
.phaseSeg2 = 1U,
.preDivider = 9U,
.rJumpwidth = 1U
},

Re: S32146 CAN FD issue

Senlent — Wed, 25 Oct 2023 01:26:49 GMT

Hi@chandan_uv

please have a try below settings.

Re: S32146 CAN FD issue

chandan_uv — Tue, 05 Dec 2023 13:09:35 GMT

@Senlent I tried but still same issue.

status_t host_can_init(void) { status_t ret = STATUS_SUCCESS; /* Configuration for 500kbps CAN bit rate */ flexcan_user_config_t can_500kbps_init_cfg = { .fd_enable =true, .pe_clock = FLEXCAN_CLK_SOURCE_PERIPH, .max_num_mb = 4, //8, .num_id_filters = FLEXCAN_RX_FIFO_ID_FILTERS_8, .is_rx_fifo_needed = false, .flexcanMode = FLEXCAN_NORMAL_MODE, .payload = FLEXCAN_PAYLOAD_SIZE_64 , //FLEXCAN_PAYLOAD_SIZE_8, .bitrate = { .propSeg = 7U, .phaseSeg1 = 4U, .phaseSeg2 = 1U, .preDivider = 9U, .rJumpwidth = 1U }, .bitrate_cbt = { .propSeg = 7U, .phaseSeg1 = 4U, .phaseSeg2 = 1U, .preDivider = 9U, .rJumpwidth = 1U }, .transfer_type = FLEXCAN_RXFIFO_USING_INTERRUPTS, .rxFifoDMAChannel = 0, }; /* CAN interface initialization */ ret = FLEXCAN_DRV_Init(HOST_CAN_INST, &host_can_state, &can_500kbps_init_cfg); DEV_ASSERT(ret == STATUS_SUCCESS); return ret; } void can_if_init_host (void) { flexcan_data_info_t data_info = { .data_length = 64U, .msg_id_type = FLEXCAN_MSG_ID_STD, .fd_enable = true, .enable_brs = false, .fd_padding = 0U }; DEV_ASSERT(FLEXCAN_DRV_ConfigRxMb(HOST_CAN_INST, HOST_RX_MBX, &data_info, RX_HOST_MSG_ID) == STATUS_SUCCESS ); FLEXCAN_DRV_SetRxMbGlobalMask(HOST_CAN_INST, FLEXCAN_MSG_ID_STD, RX_HOST_MSG_ID); DEV_ASSERT(FLEXCAN_DRV_SetRxIndividualMask(HOST_CAN_INST, FLEXCAN_MSG_ID_STD, HOST_RX_MBX, RX_HOST_MSG_ID) == STATUS_SUCCESS ); }

I checked with custom python script to receive the data, able to get data but it is in the multiple of 4, like if I send 13, receiving 16 bytes.