s32K144 can UDS bootloader: secure Access 0x27

[Chandrakant]

Hello team,

I'm trying to send 256 bytes of seed but getting issue in CAN Transmit (

''/* Write a frame data to TP TX FIFO */

boolean TP_WriteAFrameDataInTP(const uint32 i_TxMsgID,

const tpfUDSTxMsgCallBack i_pfUDSTxMsgCallBack,

const uint32 i_xTxDataLen,

const uint8 *i_pDataBuf)

{

}''

). but if i send 16 bytes of seed it's working fine i am getting seed of 16bytes at receiver side. but this is not case when i update the seed length to 256 bytes. please help me out to resolve this issue asap.

[Chandrakant]

hello Lukas, 
Thanks for the insight.
JFYR, I am using s32k144 CAN bootloader project where 16 bytes of seed has been used.My aim is to send 256 bytes of seed, I somehow managed to send 252 bytes seed by updating the below fields:

//previous #define TOTAL_FIFO_BYTES (800u) /* Config total bytes */

#define TOTAL_FIFO_BYTES (2400u) /* Config total bytes */

//#define SA_ALGORITHM_SEED_LEN (16u) /* Seed Length previous*/#define SA_ALGORITHM_SEED_LEN (256u)

uint8 aDataBuf[270u]; //updated buf size of this structure "tUdsAppMsgInfo"

//previous #define TX_TP_QUEUE_LEN (50u) /* UDS send message to TP max length */

#define TX_TP_QUEUE_LEN (300) /* UDS send message to TP max length */

//previous static void AppMemcopy(const void *i_pvSource, const uint8 i_CopyLen, void *o_pvDest);

static void AppMemcopy(const void *i_pvSource, const uint16 i_CopyLen, void *o_pvDest); <---- here by changing the datatype of copylen from uint8 to uint16, I am trying to send 256 bytes of seed but in vain, no success,.
It would be really a great help if you can help me out here.

Thanks,
Chandrakant

[lukaszadrapa]

Hi @Chandrakant 

In case of CAN FD mode, length of data is limited to 64 bytes:

And the length is checked like this:

As you can see, messageinfo will also occupy a couple of bytes. 

So, you need to follow this limitation.  

Regards,

Lukas

[Chandrakant]

Thanks Lukas for your quick response.
Got your point but is that mean seed can not be beyond 64bytes ?
can we break out 256 bytes of seed into multiple frames just to send as a service 27 response from the ECU(S32K144).
To perform the same, I was changing TX_TP_QUEUE_LEN mentioned in Tp_cfg.h from 50u to 270u but its giving issue in initialization
FYR, issue details are as below:

Program received signal SIGTRAP, Trace/breakpoint trap.
main () at ../Sources/main.c:98
98 UDS_MAIN_Init(BSP_Init, BSP_AbortCANTxMsg);

Breakpoint 1, CANTP_Init () at ../UDS_ProtocolStack/can_tp.c:429
429 ApplyFifo(RX_TP_QUEUE_LEN, RX_TP_QUEUE_ID, &eStatus);

Program received signal SIGINT, Interrupt.
0x00006782 in CANTP_Init () at ../UDS_ProtocolStack/can_tp.c:442
442 if (ERRO_NONE != eStatus)

Breakpoint 3, CANTP_Init () at ../UDS_ProtocolStack/can_tp.c:429
429 ApplyFifo(RX_TP_QUEUE_LEN, RX_TP_QUEUE_ID, &eStatus);
Can you please provide your guidance on this part?